Datasheet MT9041BP Datasheet (MITEL)

Download

Page 1

MT9041B

T1/E1 System Synchronizer

Advance Information

Features

• Supports AT&T TR62411 and Bellcore GR-1244-CORE Stratum 4 Enhanced and Stratum 4 timing for DS1 Interfaces

• Supports ETSI ETS 300 011, TBR 4, TBR 12 and TBR 13 timing for E1 Interfaces

• Selectable 1.544MHz, 2.048MHz or 8kHz input reference signals

• Provides C1.5, C2, C3, C4, C8 and C16 output clock signals

• Provides 3 different styles of 8 KHz framing pulses

• Attenuates wander from 1.9 Hz

Applications

• Synchronization and timing control for multitrunk T1 and E1 systems

• ST-BUS clock and frame pulse sources

DS5059 ISSUE 3 Septemner 1999

Ordering Information

MT9041BP 28 Pin PLCC

-40 to +85 °C

Description

The MT9041B T1/E1 System Synchronizer contains a digital phase-locked loop (DPLL), which provides timing and synchronization signals for multitrunk T1 and E1 primary rate transmission links.

The MT9041B generates ST-BUS clock and framing signals that are phase locked to either a 2.048MHz,

1.544MHz, or 8kHz input reference.

The MT9041B is compliant with AT&T TR62411 and Bellcore GR-1244-CORE Stratum 4 Enhanced, Stratum 4, and ETSI ETS 300 011. It will meet the jitter tolerance, jitter transfer, intrinsic jitter, frequency accuracy, capture range and phase change slope requirements for these speciﬁcations.

REF

VDD VSS

Phase

Detector

Mode Select

Loop Filter

MS FS1 FS2RST

Figure 1 - Functional Block Diagram

DCO

Divider

OSCi OSCo

Output

Interface

Circuit

C1.5o C3o C2o C4o C8o C16o F0o F8o F16o

Page 2

MT9041B Advance Information

VSS

IC0

REF

RST

FS1

FS2

VSS

C8o

262728

IC0

IC1 IC0

VDD

C16o

VDD

OSCo

OSCi

F16o

F0o F8o

C1.5o

MT9041B

C2o

C3o

C4o

432

5 6 7 8

9 10 11

12 13 14 15 16 17 18

Figure 2 - Pin Connections

Pin Description

Pin # Name Description

1VSSGround. 0 Volts. 2 IC0 Internal Connect. Connect to Vss 3 NC No Connect. Connect to Vss 4 REF Reference (TTL Input). PLL reference clock. 5 V 6 OSCo Oscillator Master Clock (CMOS Output). For crystal operation, a 20MHz crystal is

Positive Supply Voltage. +5VDC nominal.

connected from this pin to OSCi, see Figure 6. For clock oscillator operation, this pin is left unconnected, see Figure 5.

7 OSCi Oscillator Master Clock (CMOS Input). For crystal operation, a 20MHz crystal is

connected from this pin to OSCo, see Figure 6. For clock oscillator operation, this pin is connected to a clock source, see Figure 5.

8 F16o Frame Pulse ST-BUS 16.384Mb/s (CMO7S Output). This is an 8kHz 61ns active low

framing pulse, which marks the beginning of an ST-BUS frame. This is typically used for ST-BUS operation at 16.384Mb/s. See Figure 11.

9 F0o Frame Pulse ST-BUS 2.048Mb/s (CMOS Output). This is an 8kHz 244ns active low

framing pulse, which marks the beginning of an ST-BUS frame. This is typically used for ST-BUS operation at 2.048Mb/s and 4.096Mb/s. See Figure 11.

10 F8o Frame Pulse ST-BUS 8.192Mb/s (CMOS Output). This is an 8kHz 122ns active high

framing pulse, which marks the beginning of an ST-BUS frame. This is used for ST-BUS

operation at 8.192Mb/s. See Figure 11. 11 C1.5o Clock 1.544MHz (CMOS Output). This output is used in T1 applications. 12 C3o Clock 3.088MHz (CMOS Output). This optional output is used in T1 applications. 13 C2o Clock 2.048MHz (CMOS Output). This output is used for ST-BUS operation at 2.048Mb/s. 14 C4o Clock 4.096MHz (CMOS Output). This output is used for ST-BUS operation at 2.048Mb/s

and 4.096Mb/s. 15 V

Ground. 0 Volts.

16 C8o Clock 8.192MHz (CMOS Output). This output is used for ST-BUS operation at 8.192Mb/s. 17 C16o Clock 16.384MHz (CMOS Output). This output is used for ST-BUS operation at 16.384Mb/

s. 18 V

Positive Supply Voltage. +5VDC nominal.

Page 3

Advance Information MT9041B

Pin Description (continued)

Pin # Name Description

19 IC0 Internal Connect. Connect to Vss 20 IC1 Internal Connect. Leave open Circuit 21 IC0 Internal Connect. Connect to Vss 22 IC0 Internal Connect. Connect to Vss 23 MS Mode/Control Select (TTL Input). This pin, determines the device’s state (Normal, or

Freerun) of operation. The logic level at this input is gated in by the rising edge of F8o. See

Table 3. 24 IC0 Internal Connect. Connect to Vss 25 IC0 Internal Connect. Connect to Vss 26 FS2 Frequency Select 2 (TTL Input). This input, in conjunction with FS1, selects which of three

possible frequencies (8kHz, 1.544MHz, or 2.048MHz) may be input to the REF input. See

Table 1. 27 FS1 Frequency Select 1 (TTL Input). See pin description for FS2. 28 RST Reset (Schmitt Input). A logic low at this input resets the MT9041B. To ensure proper

operation, the device must be reset after reference signal frequency changes and power-up.

The RST pin should be held low for a minimum of 300ns. While the RST pin is low, all frame

and clock outputs are at logic high. Following a reset, the input reference source and output

clocks and frame pulses are phase aligned as shown in Figure 10.

Functional Description

The MT9041B is a System Synchronizer, providing timing (clock) and synchronization (frame) signals to interface circuits for T1 and E1 Primary Rate Digital Transmission links.

Figure 1 is a functional block diagram which is described in the following sections.

Frequency Select MUX Circuit

The MT9041B operates on the falling edges of one of three possible input reference frequencies (8kHz,

1.544MHz or 2.048MHz). The frequency select inputs (FS1 and FS2) determine which of the three frequencies may be used at the reference input (REF). A reset (RST) must be performed after every frequency select input change. Operation with FS1 and FS2 both at logic low is reserved and must not be used. See Table 1.

FS2 FS1 Input Frequency

0 0 Reserved 0 1 8kHz 1 0 1.544MHz 1 1 2.048MHz

Table 1 - Input Frequency Selection

Digital Phase Lock Loop (DPLL)

The DPLL of the MT9041B consists of a Phase Detector, Limiter, Loop Filter, Digitally Controlled Oscillator, and a Control Circuit (see Figure 3).

Phase Detector - the Phase Detector compares the primary reference signal (REF) with the feedback signal from the Frequency Select MUX circuit, and provides an error signal corresponding to the phase difference between the two. This error signal is passed to the Limiter circuit. The Frequency Select MUX allows the proper feedback signal to be externally selected (e.g., 8kHz, 1.544MHz or

2.048MHz).

Limiter - the Limiter receives the error signal from the Phase Detector and ensures that the DPLL responds to all input transient conditions with a maximum output phase slope of 5ns per 125us. This

Page 4

MT9041B Advance Information

REF Reference

Frequency Select MUX

Phase

Detector

Feedback Signal

from

Limiter Loop Filter

Figure 3 - DPLL Block Diagram

is well within the maximum phase slope of 7.6ns per 125us or 81ns per 1.326ms speciﬁed by Bellcore GR-1244-CORE Stratum 4E.

Loop Filter - the Loop Filter is similar to a ﬁrst order low pass ﬁlter with a 1.9 Hz cutoff frequency for all three reference frequency selections (8kHz,

1.544MHz or 2.048MHz). This ﬁlter ensures that the jitter transfer requirements in ETS 300 011 and AT&T TR62411 are met.

Control Circuit - the Control Circuit sets the mode of the DPLL. The two possible modes are Normal and Freerun.

Digitally Controlled Oscillator (DCO) - the DCO receives the limited and ﬁltered signal from the Loop FIlter, and based on its value, generates a corresponding digital output signal. The synchronization method of the DCO is dependent on the state of the MT9041B.

Digitally

Controlled

Oscillator

Control

Circuit

DPLL Reference

Output Interface Circuit

outputs. The C8o, C4o and C2o clocks are generated by simply dividing the C16o clock by two, four and eight respectively. These outputs have a nominal 50% duty cycle.

The T1 Divider Circuit uses the 12.384MHz signal to generate two clock outputs. C1.5o and C3o are generated by dividing the internal C12 clock by four and eight respectively. These outputs have a nominal 50% duty cycle.

C1.5o

C3o

From

DPLL

Tapped

Delay

Line

12MHz

T1 Divider

In Normal Mode, the DCO provides an output signal which is frequency and phase locked to the selected input reference signal.

In Freerun Mode, the DCO is free running with an accuracy equal to the accuracy of the OSCi 20MHz source.

Output Interface Circuit

The output of the DCO (DPLL) is used by the Output Interface Circuit to provide the output signals shown in Figure 4. The Output Interface Circuit uses two Tapped Delay Lines followed by a T1 Divider Circuit and an E1 Divider Circuit to generate the required output signals.

Two tapped delay lines are used to generate a

16.384MHz and a 12.352MHz signals.

The E1 Divider Circuit uses the 16.384MHz signal to generate four clock outputs and three frame pulse

C2o C4o C8o C16o F0o F8o F16o

Tapped

Delay

Line

E1 Divider

16MHz

Figure 4 - Output Interface Circuit Block

Diagram

The frame pulse outputs (F0o, F8o, F16o) are generated directly from the C16 clock.

The T1 and E1 signals are generated from a common DPLL signal. Consequently, the clock outputs C1.5o, C3o, C2o, C4o, C8o, C16o, F0o and F16o are locked to one another for all operating states, and are also locked to the selected input reference in Normal Mode. See Figures 11 and 12.

Page 5

Advance Information MT9041B

All frame pulse and clock outputs hav e limited driving capability, and should be buffered when driving high capacitance (e.g. 30pF) loads.

Master Clock

The MT9041B can use either a clock or crystal as the master timing source. For recommended master timing circuits, see the Applications - Master Clock section.

Control and Modes of Operation

The MT9041B can operate either in Normal or Freerun modes.

As shown in Table 2, pin MS selects between NORMAL and FREERUN modes.

MS Description of Operation

0 NORMAL 1 FREERUN

Table 2 - Operating Modes

Freerun Mode

Freerun Mode is typically used when a master clock source is required, or immediately following system power-up before network synchronization is achieved.

In Freerun Mode, the MT9041B provides timing and synchronization signals which are based on the master clock frequency (OSCi) only, and are not synchronized to the reference signal (REF).

The accuracy of the output clock is equal to the accuracy of the master clock (OSCi). So if a ±32ppm output clock is required, the master clock must also be ±32ppm. See Applications - Crystal and Clock Oscillator sections.

MT9041B Measures of Performance

The following are some synchronizer performance indicators and their corresponding deﬁnitions.

Intrinsic Jitter

Normal Mode

Normal Mode is typically used when a slave clock source synchronized to the network is required.

In Normal Mode, the MT9041B provides timing (C1.5o, C2o, C3o, C4o, C8o and C16o) and frame synchronization (F0o, F8o, F16o) signals, which are synchronized to reference input (REF). The input reference signal may have a nominal frequency of 8kHz, 1.544MHz or 2.048MHz.

From a reset condition, the MT9041B will take up to 25 seconds for the output signal to be phase locked to the reference.

The reference frequencies are selected by the frequency control pins FS2 and FS1 as shown in Table 1.

Intrinsic jitter is the jitter produced by the synchronizing circuit and is measured at its output. It is measured by applying a reference signal with no jitter to the input of the device, and measuring its output jitter. Intrinsic jitter may also be measured when the device is in a non-synchronizing mode, i.e. free running mode, by measuring the output jitter of the device. Intrinsic jitter is usually measured with various bandlimiting ﬁlters depending on the applicable standards.

Jitter Tolerance

Jitter tolerance is a measure of the ability of a PLL to operate properly (i.e., remain in lock and or regain lock), in the presence of large jitter magnitudes at various jitter frequencies applied to its reference. The applied jitter magnitude and jitter frequency depends on the applicable standards.

Jitter Transfer

Jitter transfer or jitter attenuation refers to the magnitude of jitter at the output of a device for a given amount of jitter at the input of the device. Input jitter is applied at various amplitudes and frequencies, and output jitter is measured with various ﬁlters depending on the applicable standards.

Page 6

MT9041B Advance Information

For the MT9041B, two internal elements determine the jitter attenuation. This includes the internal 1.9Hz low pass loop ﬁlter and the phase slope limiter. The phase slope limiter limits the output phase slope to 5ns/125us. Therefore, if the input signal exceeds this rate, such as for very large amplitude low frequency input jitter, the maximum output phase slope will be limited (i.e., attenuated) to 5ns/125us.

The MT9041B has nine outputs with three possible input frequencies for a total of 27 possible jitter transfer functions. However, the data sheet section on AC Electrical Characteristics - Jitter Transfer speciﬁes transfer values for only three cases, 8kHz to 8kHz, 1.544MHz to 1.544MHz and 2.048MHz to

2.048MHz. Since all outputs are derived from the same signal, these transfer values apply to all outputs.

It should be noted that 1UI at 1.544MHz is 644ns, which is not equal to 1UI at 2.048MHz, which is

488ns. Consequently, a transfer value using different input and output frequencies must be calculated in common units (e.g. seconds) as shown in the following example.

What is the T1 and E1 output jitter when the T1 input jitter is 20UI (T1 UI Units) and the T1 to T1 jitter attenuation is 18dB?

usually made with large input jitter signals (e.g. 75% of the speciﬁed maximum jitter tolerance).

Frequency Accuracy

Frequency accuracy is deﬁned as the absolute tolerance of an output clock signal when it is not locked to an external reference, but is operating in a free running mode. For the MT9041B, the Freerun accuracy is equal to the Master Clock (OSCi) accuracy.

Capture Range

Also referred to as pull-in range. This is the input frequency range over which the synchronizer must be able to pull into synchronization. The MT9041B capture range is equal to ±230ppm minus the accuracy of the master clock (OSCi). For example, a

±32ppm master clock results in a capture range of ±198ppm.

Lock Range

This is the input frequency range over which the synchronizer must be able to maintain synchronization. The lock range is equal to the capture range for the MT9041B.

A–



------ -



OutputT 1 InputT1



OutputT 120

OutputE1 OutputT1

Using the above method, the jitter attenuation can be calculated for all combinations of inputs and outputs based on the three jitter transfer functions provided.

Note that the resulting jitter transfer functions for all combinations of inputs (8kHz, 1.544MHz, 2.048MHz) and outputs (8kHz, 1.544MHz, 2.048MHz,

4.096MHz, 8.192MHz, 16.384MHz) for a given input signal (jitter frequency and jitter amplitude) are the same.

Since intrinsic jitter is always present, jitter attenuation will appear to be lower for small input jitter signals than for large ones. Consequently, accurate jitter transfer function measurements are



×10 2.5UI T 1()==

×10= 18–

-------- 20

1UIT1()

----------------------

×=

1UIE 1()

-------------------

644ns() 488ns()

3.3UI T 1()=×=

Phase Slope

Phase slope is measured in seconds per second and is the rate at which a given signal changes phase with respect to an ideal signal. The given signal is typically the output signal. The ideal signal is of constant frequency and is nominally equal to the value of the ﬁnal output signal or ﬁnal input signal.

Phase Continuity

Phase continuity is the phase difference between a given timing signal and an ideal timing signal at the end of a particular observation period. Usually, the given timing signal and the ideal timing signal are of the same frequency. Phase continuity applies to the output of the synchronizer after a signal disturbance due to a reference switch or a mode change. The observation period is usually the time from the disturbance, to just after the synchronizer has settled to a steady state.

In the case of the MT9041B, the output signal phase continuity is maintained to within ±5ns at the instance (over one frame) of mode changes. The total phase shift may accumulate up to ±200ns over

Page 7

Advance Information MT9041B

many frames. The rate of change of the ±200ns phase shift is limited to a maximum phase slope of approximately 5ns/125us. This meets the Bellcore GR-1244-CORE maximum phase slope requirement of 7.6ns/125us (81ns/1.326ms).

Phase Lock Time

This is the time it takes the synchronizer to phase lock to the input signal. Phase lock occurs when the input signal and output signal are not changing in phase with respect to each other (not including jitter).

Lock time is very difﬁcult to determine because it is affected by many factors which include:

i) initial input to output phase difference ii) initial input to output frequency difference iii) synchronizer loop ﬁlter iv) synchronizer limiter

Although a short lock time is desirable, it is not always possible to achieve due to other synchronizer requirements. For instance, better jitter transfer performance is achieved with a lower frequency loop ﬁlter which increases lock time. And better (smaller) phase slope performance (limiter) results in longer lock times. The MT9041B loop ﬁlter and limiter were optimized to meet the AT&T TR62411 jitter transfer and phase slope requirements. Consequently, phase lock time, which is not a standards requirement, may be longer than in other applications. See AC Electrical Characteristics - Performance for maximum phase lock time.

MT9041B and Network Speciﬁcations

The MT9041B fully meets all applicable PLL requirements (intrinsic jitter, jitter tolerance, jitter transfer, frequency accuracy, capture range and phase change slope) for the following speciﬁcations.

1. Bellcore GR-1244-CORE Issue 1, June 1995 for Stratum 4 Enhanced and Stratum 4

2. AT&T TR62411 (DS1) December 1990 for Stratum

4 Enhanced and Stratum 4

3. ANSI T1.101 (DS1) February 1994 for Stratum 4

Enhanced and Stratum 4

4. ETSI 300 011 (E1) April 1992 forSingle Access

and Multi Access

5. TBR 4 November 1995

6. TBR 12 December 1993

7. TBR 13 January 1996

8. ITU-T I.431 March 1993

Applications

This section contains MT9041B application speciﬁc details for clock and crystal operation, reset operation and power supply decoupling.

Master Clock

The MT9041B can use either a clock or crystal as the master timing source.

In Freerun Mode, the frequency tolerance at the clock outputs is identical to the frequency tolerance of the source at the OSCi pin. For applications not requiring an accurate Freerun Mode, tolerance of the master timing source may be ±100ppm. For applications requiring an accurate Freerun Mode, such as Bellcore GR-1244-CORE, the tolerance of the master timing source must be no greater than ±32ppm.

Another consideration in determining the accuracy of the master timing source is the desired capture range. The sum of the accuracy of the master timing source and the capture range of the MT9041B will always equal ±230ppm. For example, if the master timing source is ±100ppm, then the capture range will be ±130ppm.

Clock Oscillator - when selecting a Clock Oscillator, numerous parameters must be considered. These include absolute frequency, frequency change over temperature, output rise and fall times, output levels and duty cycle. See AC Electrical Characteristics.

MT9041B

OSCi

OSCo

No Connection

Figure 5 - Clock Oscillator Circuit

+5V

20MHz OUT

GND 0.1uF

Page 8

MT9041B Advance Information

For applications requiring ±32ppm clock accuracy, the following clock oscillator module may be used.

CTS CXO-65-HG-5-C-20.0MHz Frequency: 20MHz Tolerance: 25ppm 0C to 70C Rise & Fall Time: 8ns (0.5V 4.5V 50pF) Duty Cycle: 45% to 55%

The output clock should be connected directly (not AC coupled) to the OSCi input of the MT9041B, and the OSCo output should be left open as shown in Figure 5.

Crystal Oscillator - Alternatively, a Crystal Oscillator may be used. A complete oscillator circuit made up of a crystal, resistor and capacitors is shown in Figure 6.

MT9041B

OSCi

20MHz

1MΩ

Frequency: 20MHz Tolerance: As required Oscillation Mode: Fundamental Resonance Mode: Parallel Load Capacitance: 32pF Maximum Series Resistance: 35 Approximate Drive Level: 1mW e.g., CTS R1027-2BB-20.0MHZ (

20ppm absolute,±6ppm 0C to 50C, 32pF, 25Ω)

Ω

Reset Circuit

A simple power up reset circuit with about a 50us reset low time is shown in Figure 7. Resistor RP is for protection only and limits current into the RST pin during power down conditions. The reset low time is not critical but should be greater than 300ns.

MT9041B

+5V

10kΩ

56pF

OSCo

100Ω

1uH inductor: may improve stability and is optional

39pF

3-50pF

1uH

Figure 6 - Crystal Oscillator Circuit

The accuracy of a crystal oscillator depends on the crystal tolerance as well as the load capacitance tolerance. Typically, for a 20MHz crystal speciﬁed with a 32pF load capacitance, each 1pF change in load capacitance contributes approximately 9ppm to the frequency deviation. Consequently, capacitor tolerances, and stray capacitances have a major effect on the accuracy of the oscillator frequency.

The trimmer capacitor shown in Figure 6 may be used to compensate for capacitive effects. If accuracy is not a concern, then the trimmer may be removed, the 39pF capacitor may be increased to 56pF, and a wider tolerance crystal may be substituted.

The crystal should be a fundamental mode type - not an overtone. The fundamental mode crystal permits a simpler oscillator circuit with no additional ﬁlter components and is less likely to generate spurious responses. The crystal speciﬁcation is as follows.

RST

1kΩ

10nF

Figure 7 - Power-Up Reset Circuit

Power Supply Decoupling

The MT9041B has two VDD (+5V) pins and two VSS (GND) pins. Power and decoupling capacitors should be included as shown in Figure 8.

0.1uF

MT9041B

0.1uF

Figure 8 - Power Supply Decoupling

Page 9

Advance Information MT9041B

Link 0

Links 1-7

MT9074

TTIP TRING

RTIP RRING

MT9074

TTIP TRING

RTIP RRING

F0i

C4b

E1.5o

LOS

F0i

C4b

E1.5o

LOS

To Controller

Interrupt

To Controller

Interrupt

IN0 IN1

IN2 IN3 IN4 IN5

IN6 IN7

1 TO 8

MUX

OUT

MT9041B

F0o C4o

REF

RST

1kΩ 10kΩ

10nF

OSCi

FS1 FS2

+ 5V

20MHz

+ 5V

CLOCK

Out

20MHz ±32ppm

Figure 9 - Multiple E1 Reference Sources with MT9041B

Multiple E1 Reference Sources with MT9041B

In this example 8 E1 link framers (MT9074) are connected to a common system backplane clock using the MT9041B. Each of the extracted clocks E1.5o go to a mux which selects one of the eight input clocks as the reference to the MT9041B. The clock choice is made by a controller using the loss of signal pin LOS from the MT9074s to qualify potential references. In the event of loss of signal by one of the framers, an interrupt signals the controller to choose a different reference clock. Disturbances in the generated system backplane clocks C4b and F0b are minimized by the phase slope limitations of the MT9041B PLL. This ensures system integrity and minimizes the effect of clock switchover on downstream trunks.

Page 10

MT9041B Advance Information

Absolute Maximum Ratings* - Voltages are with respect to ground (V

) unless otherwise stated.

Parameter Symbol Min Max Units

1 Supply voltage V 2 Voltage on any pin V 3 Current on any pin I 4 Storage temperature T 5 PLCC package power dissipation P

* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.

Recommended Operating Conditions - Voltages are with respect to ground (V

-0.3 7.0 V

-0.3 VDD+0.3 V 20 mA

-55 125 °C 900 mW

) unless otherwise stated.

Characteristics Sym Min Typ Max Units

1 Supply voltage V 2 Operating temperature T

DC Electrical Characteristics* - Voltages are with respect to ground (V

4.5 5.0 5.5 V

-40 25 85 °C

) unless otherwise stated.

Characteristics Sym Min Max Units Conditions/Notes

1 Supply current with:OSCi = 0V I 2 OSCi = Clock I 3 TTL high-level input voltage V 4 TTL low-level input voltage V 5 CMOS high-level input voltage V 6 CMOS low-level input voltage V 7 Schmitt high-level input voltage V 8 Schmitt low-level input voltage V

9 Schmitt hysteresis voltage V 10 Input leakage current I 11 High-level output voltage V 12 Low-level output voltage V

* Supply voltage and operating temperature are as per Recommended Operating Conditions.

DDS

CIH

CIL

SIH

SIL

HYS

2.0 V

0.7V

2.3 V RST

0.4 V RST

-50 +50 uAV

0.8V

0.5 mA Outputs unloaded 60 mA Outputs unloaded

0.8 V

0.3V

0.8 V RST

0.2V

V OSCi V OSCi

I=VDD

VIOH=4mA VIOL=4mA

or 0V

Page 11

Advance Information MT9041B

AC Electrical Characteristics - Performance

Characteristics Sym Min Max Units Conditions/Notes†

1 Freerun Mode accuracy with OSCi at: 0ppm -0 +0 ppm 2-5 2 ±32ppm -32 +32 ppm 2-5 3 ±100ppm -100 +100 ppm 2-5 4 Capture range with OSCi at: 0ppm -230 +230 ppm 1,3-5,37 5 ±32ppm -198 +198 ppm 1,3-5, 37 6 ±100ppm -130 +130 ppm 1,3-5,37 7 Phase lock time 30 s 1, 3-11 8 Output phase continuity with:

9 mode switch to Normal 200 ns 1-11 10 mode switch to Freerun 200 ns 1, 3-11 11 Output phase slope 45 us/s 1-11, 24

† See "Notes" following AC Electrical Characteristics tables.

AC Electrical Characteristics - Timing P arameter Measurement Voltage Levels* - Voltages are

with respect to ground (VSS) unless otherwise stated.

Characteristics Sym Schmitt TTL CMOS Units

1 Threshold Voltage V 2 Rise and Fall Threshold Voltage High V 3 Rise and Fall Threshold Voltage Low V

* Supply voltage and operating temperature are as per Recommended Operating Conditions. * Timing for input and output signals is based on the worst Chislehurst of the combination of TTL and CMOS thresholds. * See Figure 10.

Timing Reference Points

ALL SIGNALS

IRF, tORF

T HM LM

Figure 10 - Timing Parameter Measurement Voltage Levels

1.5 1.5 0.5V

2.3 2.0 0.7V

0.8 0.8 0.3V

IRF, tORF

DD DD DD

V V V

Page 12

MT9041B Advance Information

AC Electrical Characteristics - Input/Output Timing

Characteristics Sym Min Max Units

1 Reference input pulse width high or low t 2 Reference input rise or fall time t 3 8kHz reference input to F8o delay t 4 1.544MHz reference input to F8o delay t 5 2.048MHz reference input to F8o delay t 6 F8o to F0o delay t 7 F16o setup to C16o falling t 8 F16o hold from C16o rising t

9 F8o to C1.5o delay t 10 F8o to C3o delay t 11 F8o to C2o delay t 12 F8o to C4o delay t 13 F8o to C8o delay t 14 F8o to C16o delay t 15 C1.5o pulse width high or low t 16 C3o pulse width high or low t 17 C2o pulse width high or low t 18 C4o pulse width high or low t 19 C8o pulse width high or low t 20 C16o pulse width high or low t 21 F0o pulse width low t 22 F8o pulse width high t 23 F16o pulse width low t 24 Output clock and frame pulse rise or fall time t 25 Input Controls Setup Time t 26 Input Controls Hold Time t

† See "Notes" following AC Electrical Characteristics tables.

RW IRF

R8D

R15D

R2D

F0D F16S F16H

C15D

C3D C2D C4D

C8D C16D C15W

C3W C2W C4W C8W

C16WL

F0WL F8WH

F16WL

ORF

100 ns

10 ns

-21 6 ns 337 363 ns 222 238 ns 110 134 ns

11 35 ns

020ns

-51 -37 ns

-13 2 ns

-13 2 ns 309 339 ns 149 175 ns 230 258 ns 111 133 ns

52 70 ns

24 35 ns 230 258 ns 111 133 ns

52 70 ns

9ns 100 ns 100 ns

Page 13

Advance Information MT9041B

REF 8kHz

REF

1.544MHz

REF

2.048MHz

R15D

R2D

R8D

F8o

NOTES:

1. Input to output delay values are valid after a TRST or RST with no further state changes

F8o

F0o

F16o

C16o

C8o

C4o

Figure 11 - Input to Output Timing (Normal Mode)

F8WH

C16WL

C8W

C4W

C8W

C4W

F0WL

F16S

F16WL

C8D

C4D

F0D

C16D

F16H

C2o

C3o

C1.5o

C2W

C3W

C15W

C3W

Figure 12 - Output Timing 1

C2D

C3D

C15D

Page 14

MT9041B Advance Information

F8o

Figure 13 - Input Controls Setup and Hold Timing

AC Electrical Characteristics - Intrinsic Jitter Unﬁltered

Characteristics Sym Min Max Units Conditions/Notes†

1 Intrinsic jitter at F8o (8kHz) 0.0002 UIpp 1-11,18-21,25 2 Intrinsic jitter at F0o (8kHz) 0.0002 UIpp 1-11,18-21,25 3 Intrinsic jitter at F16o (8kHz) 0.0002 UIpp 1-11,18-21,25 4 Intrinsic jitter at C1.5o (1.544MHz) 0.030 UIpp 1-11,18-21,26 5 Intrinsic jitter at C2o (2.048MHz) 0.040 UIpp 1-11,18-21,27 6 Intrinsic jitter at C3o (3.088MHz) 0.060 UIpp 1-11,18-21,28 7 Intrinsic jitter at C4o (4.096MHz) 0.080 UIpp 1-11,18-21,29 8 Intrinsic jitter at C8o (8.192MHz) 0.160 UIpp 1-11,18-21,30

9 Intrinsic jitter at C16o (16.384MHz) 0.320 UIpp 1-11,18-21,33

† See "Notes" following AC Electrical Characteristics tables.

AC Electrical Characteristics - C1.5o (1.544MHz) Intrinsic Jitter Filtered

Characteristics Sym Min Max Units Conditions/Notes†

1 Intrinsic jitter (4Hz to 100kHz ﬁlter) 0.015 UIpp 1-11,18-21,26 2 Intrinsic jitter (10Hz to 40kHz ﬁlter) 0.010 UIpp 1-11,18-21,26 3 Intrinsic jitter (8kHz to 40kHz ﬁlter) 0.010 UIpp 1-11,18-21,26 4 Intrinsic jitter (10Hz to 8kHz ﬁlter) 0.005 UIpp 1-11,18-21,26

† See "Notes" following AC Electrical Characteristics tables.

AC Electrical Characteristics - C2o (2.048MHz) Intrinsic Jitter Filtered

Characteristics Sym Min Max Units Conditions/Notes†

1 Intrinsic jitter (4Hz to 100kHz ﬁlter) 0.015 UIpp 1-11, 18-21, 27 2 Intrinsic jitter (10Hz to 40kHz ﬁlter) 0.010 UIpp 1-11, 18-21, 27 3 Intrinsic jitter (8kHz to 40kHz ﬁlter) 0.010 UIpp 1-11, 18-21, 27 4 Intrinsic jitter (10Hz to 8kHz ﬁlter) 0.005 UIpp 1-11, 18-21, 27

† See "Notes" following AC Electrical Characteristics tables.

Page 15

Advance Information MT9041B

AC Electrical Characteristics - 8kHz Input to 8kHz Output Jitter Transfer

Characteristics Sym Min Max Units Conditions/Notes†

1 Jitter attenuation for 1Hz@0.01UIpp input 0 6 dB 1,3,6-11,18-19,21,25,32 2 Jitter attenuation for 1Hz@0.54UIpp input 6 16 dB 1,3,6-11,18-19,21,25,32 3 Jitter attenuation for 10Hz@0.10UIpp

input

4 Jitter attenuation for 60Hz@0.10UIpp

input

5 Jitter attenuation for 300Hz@0.10UIpp

input

6 Jitter attenuation for 3600Hz@0.005UIpp

input

† See "Notes" following AC Electrical Characteristics tables.

12 22 dB 1,3,6-11,18-19,21,25,32

28 38 dB 1,3,6-11,18-19,21,25,32

42 dB 1,3,6-11,18-19,21,25,32

45 dB 1,3,6-11,18-19,21,25,32

AC Electrical Characteristics - 1.544MHz Input to 1.544MHz Output Jitter Transfer

Characteristics Sym Min Max Units Conditions/Notes†

1 Jitter attenuation for 1Hz@20UIpp input 0 6 dB 1,4,6-11,18-19,21,26,32 2 Jitter attenuation for 1Hz@104UIpp input 6 16 dB 1,4,6-11,18-19,21,26,32 3 Jitter attenuation for 10Hz@20UIpp input 12 22 dB 1,4,6-11,18-19,21,26,32 4 Jitter attenuation for 60Hz@20UIpp input 28 38 dB 1,4,6-11,18-19,21,26,32 5 Jitter attenuation for 300Hz@20UIpp input 42 dB 1,4,6-11,18-19,21,26,32 6 Jitter attenuation for 10kHz@0.3UIpp input 45 dB 1,4,6-11,18-19,21,26,32 7 Jitter attenuation for 100kHz@0.3UIpp

input

† See "Notes" following AC Electrical Characteristics tables.

45 dB 1,4,6-11,18-19,21,26,32

Page 16

MT9041B Advance Information

AC Electrical Characteristics - 2.048MHz Input to 2.048MHz Output Jitter Transfer

Characteristics Sym Min Max Units Conditions/Notes†

1 Jitter at output for 1Hz@3.00UIpp input 2.9 UIpp 1,5,6-11,18-19,21,27,32 2 with 40Hz to 100kHz ﬁlter 0.09 UIpp 1-5,6-11,18-19, 21,27,33 3 Jitter at output for 3Hz@2.33UIpp input 1.3 UIpp 1,5,6-11,18-19,21,27,32 4 with 40Hz to 100kHz ﬁlter 0.10 UIpp 1-5,6-11,18-19,21,2733 5 Jitter at output for 5Hz@2.07UIpp input 0.80 UIpp 1,5,6-11,18-19,21,27,32 6 with 40Hz to 100kHz ﬁlter 0.10 UIpp 1-5,6-11,18-19, 21,27,33 7 Jitter at output for 10Hz@1.76UIpp input 0.40 UIpp 1,5,6-11,18-19,21,27,32 8 with 40Hz to 100kHz ﬁlter 0.10 UIpp 1-5,6-11,18-19, 21,27,33

9 Jitter at output for 100Hz@1.50UIpp input 0.06 UIpp 1,5,6-11,18-19,21,27,32 10 with 40Hz to 100kHz ﬁlter 0.05 UIpp 1-5,6-11,18-19, 21,27,33 11 Jitter at output for 2400Hz@1.50UIpp input 0.04 UIpp 1,5,6-11,18-19,21,27,32 12 with 40Hz to 100kHz ﬁlter 0.03 UIpp 1-5,6-11,18-19,21,27,33 13 Jitter at output for 100kHz@0.20UIpp input 0.04 UIpp 1,5,6-11,18-19,21,27,32 14 with 40Hz to 100kHz ﬁlter 0.02 UIpp 1-5,6-11,18-19,21,27,33

† See "Notes" following AC Electrical Characteristics tables.

AC Electrical Characteristics - 8kHz Input Jitter Tolerance

Characteristics Sym Min Max Units Conditions/Notes†

1 Jitter tolerance for 1Hz input 0.80 UIpp 1,3,6-11,18-19,21-23,25 2 Jitter tolerance for 5Hz input 0.70 UIpp 1,3,6-11,18-19,21-23,25 3 Jitter tolerance for 20Hz input 0.60 UIpp 1,3,6-11,18-19,21-23,25 4 Jitter tolerance for 300Hz input 0.20 UIpp 1,3,6-11,18-19,21-23,25 5 Jitter tolerance for 400Hz input 0.15 UIpp 1,3,6-11,18-19,21-23,25 6 Jitter tolerance for 700Hz input 0.08 UIpp 1,3,6-11,18-19,21-23,25 7 Jitter tolerance for 2400Hz input 0.02 UIpp 1,3,6-11,18-19,21-23,25 8 Jitter tolerance for 3600Hz input 0.01 UIpp 1,3,6-11,18-19,21-23,25

† See "Notes" following AC Electrical Characteristics tables.

Page 17

Advance Information MT9041B

AC Electrical Characteristics - 1.544MHz Input Jitter Tolerance

Characteristics Sym Min Max Units Conditions/Notes†

1 Jitter tolerance for 1Hz input 150 UIpp 1,4,6-11,18-19,21-23,26 2 Jitter tolerance for 5Hz input 140 UIpp 1,4,6-11,18-19,21-23,26 3 Jitter tolerance for 20Hz input 130 UIpp 1,4,6-11,18-19,21-23,26 4 Jitter tolerance for 300Hz input 35 UIpp 1,4,6-11,18-19,21-23,26 5 Jitter tolerance for 400Hz input 25 UIpp 1,4,6-11,18-19,21-23,26 6 Jitter tolerance for 700Hz input 15 UIpp 1,4,6-11,18-19,21-23,26 7 Jitter tolerance for 2400Hz input 4 UIpp 1,4,6-11,18-19,21-23,26 8 Jitter tolerance for 10kHz input 1 UIpp 1,4,6-11,18-19,21-23,26 9 Jitter tolerance for 100kHz input 0.5 UIpp 1,4,6-11,18-19,21-23,26

† See "Notes" following AC Electrical Characteristics tables.

AC Electrical Characteristics - 2.048MHz Input Jitter Tolerance

Characteristics Sym Min Max Units Conditions/Notes†

1 Jitter tolerance for 1Hz input 150 UIpp 1,5,6-11,18-19,21-23,27 2 Jitter tolerance for 5Hz input 140 UIpp 1,5,6-11,18-19,21-23,27 3 Jitter tolerance for 20Hz input 130 UIpp 1,5,6-11,18-19,21-23,27 4 Jitter tolerance for 300Hz input 50 UIpp 1,5,6-11,18-19,21-23,27 5 Jitter tolerance for 400Hz input 40 UIpp 1,5,6-11,18-19,21-23,27 6 Jitter tolerance for 700Hz input 20 UIpp 1,5,6-11,18-19,21-23,27 7 Jitter tolerance for 2400Hz input 5 UIpp 1,5,6-11,18-19,21-23,27 8 Jitter tolerance for 10kHz input 1 UIpp 1,5,6-11,18-19,21-23,27 9 Jitter tolerance for 100kHz input 1 UIpp 1,5,6-11,18-19,21-23,27

† See "Notes" following AC Electrical Characteristics tables.

AC Electrical Characteristics - OSCi 20MHz Master Clock Input

Characteristics Sym Min Typ Max Units Conditions/Notes†

1 Frequency accuracy

(20 MHz nominal)

2 -32 0 +32 ppm 16,19

-0 0 +0 ppm 15,18

3 -100 0 +100 ppm 17,20 4 Duty cycle 40 50 60 % 5 Rise time 10 ns 6 Fall time 10 ns

† See "Notes" following AC Electrical Characteristics tables.

Page 18

MT9041B Advance Information

† Notes:

Voltages are with respect to ground (VSS) unless otherwise stated. Supply voltage and operating temperature are as per Recommended Operating Conditions. Timing parameters are as per AC Electrical Characteristics - Timing Parameter Measurement Voltage Levels

1. Normal Mode selected.

2. Freerun Mode selected.

3. 8kHz Frequency Mode selected.

4. 1.544MHz Frequency Mode selected.

5. 2.048MHz Frequency Mode selected.

6. Master clock input OSCi at 20MHz ±0ppm.

7. Master clock input OSCi at 20MHz ±32ppm.

8. Master clock input OSCi at 20MHz ±100ppm.

9. Selected reference input at ±0ppm.

10. Selected reference input at ±32ppm.

11. Selected reference input at ±100ppm.

12. For Freerun Mode of ±0ppm.

13. For Freerun Mode of ±32ppm.

14. For Freerun Mode of ±100ppm.

15. For capture range of ±230ppm.

16. For capture range of ±198ppm.

17. For capture range of ±130ppm.

18. 25pF capacitive load.

19. OSCi Master Clock jitter is less than 2nspp, or 0.04UIpp where1UIpp=1/20MHz.

20. Jitter on reference input is less than 7nspp.

21. Applied jitter is sinusoidal.

22. Minimum applied input jitter magnitude to regain synchronization.

23. Loss of synchronization is obtained at slightly higher input jitter amplitudes.

24. Within 10ms of the state, reference or input change.

25. 1UIpp = 125us for 8kHz signals.

26. 1UIpp = 648ns for 1.544MHz signals.

27. 1UIpp = 488ns for 2.048MHz signals.

28. 1UIpp = 323ns for 3.088MHz signals.

29. 1UIpp = 244ns for 4.096MHz signals.

30. 1UIpp = 122ns for 8.192MHz signals.

31. 1UIpp = 61ns for 16.384MHz signals.

32. No ﬁlter.

33. 40Hz to 100kHz bandpass ﬁlter.

34. With respect to reference input signal frequency.

35. After a RST or TRST.

36. Master clock duty cycle 40% to 60%.

Page 19

http://www.mitelsemi.com

World Headquarters - Canada

Tel: +1 (613) 592 2122

Fax: +1 (613) 592 6909

North America Asia/Paciﬁc Europe, Middle East,

Tel: +1 (770) 486 0194 Tel: +65 333 6193 and Africa (EMEA)

Fax: +1 (770) 631 8213 Fax: +65 333 6192 Tel: +44 (0) 1793 518528

Fax: +44 (0) 1793 518581

Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. However, Mitel assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Mitel or licensed from third parties by Mitel, whatsoever. Purchasers of products are also hereby notiﬁed that the use of product in certain ways or in combination with Mitel, or non-Mitel furnished goods or services may infringe patents or other intellectual property rights owned by Mitel.

This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their speciﬁcations, services and other information appearing in this publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a speciﬁc piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in signiﬁcant injury or death to the user. All products and materials are sold and services provided subject to Mitel’s conditions of sale which are available on request.

TECHNICAL DOCUMENTATION - NOT FOR RESALE