MAXIM MAX3270 User Manual

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19-0379; Rev 0; 3/95

155Mbps/622Mbps Clock Recovery and

Data Retiming IC with Fully Integrated

_______________General Description

The MAX3270 is a complete Clock Recovery and Data
Retiming IC for 155Mbps and 622Mbps SDH/SONET
and ATM applications. The MAX3270 meets Bellcore
and CCITT jitter tolerance specifications ensuring error­free data recovery. Recovered clock and data are
phase aligned using a fully integrated phase-locked
loop (PLL). An output frequency monitor (FM) is includ­ed to detect loss of PLL acquisition or a loss of input
data.

The MAX3270 has differential ECL input and output
interfaces, so it is less susceptible to noise in a high­frequency environment. The fully integrated PLL
includes an integrated phase-frequency detector that
eliminates the need for external references.

________________________Applications

155Mbps (STM-1/OC-3)/622Mbps (STM-4/
OC-12) SDH/SONET Transmission Systems

155Mbps/622Mbps ATM/SONET Access Nodes
Add/Drop Multiplexers
Cross-Connects

Phase/Frequency Detector

____________________________Features

♦ Supports Both 155Mbps and 622Mbps Clock

Recovery and Data Retiming

♦ Fully Integrated Phase/Frequency Detector
♦ Capable of Switching to an External Clock
♦ Differential 100K ECL Data and Clock I/Os
♦ Output Monitor Provides Lock Detection
♦ No External Reference Clock Required

______________Ordering Information

PART

MAX3270EMH -40°C to +85°C

Pin Configuration appears at end of data sheet.

TEMP. RANGE PIN-PACKAGE

44 MQFP

MAX3270

___________________________________________________Typical Operating Circuit

3

SDIP

50Ω

-2V

4

SDIN

41

PHADJ

50Ω

-2V

50Ω

EXCS AND CRS ARE CONNECTED FOR
622Mbps OPERATION.

42

VR

13

EXCS

18

CRS

20

+5V

-2V

RST

14

EXC

________________________________________________________________

+5V

17219 3839

11

VTTL

DVCC

DVCC

16 15 57 272932

AVCC

DVCC

AVCC

DVCC

AVCC

AVCC

24

OVCC

OVCC

OVCC

MAX3270

AVEE1

AVEE2

GVEE

DVEE

DVEE

DVEE

DVEE

DVEE

1

12

-4.5V-4.5V -4.5V

ANALOG SUPPLY

35 36 22 21 34

-4.5V
DIGITAL
SUPPLY

-2V

50Ω

50Ω

50Ω 50Ω

26

RDOP

25

OVCC

RDON

31

RCOP

30

RCON

28

CRP

9

FILP
FILG

FILN

FM

BYPASS SUPPLIES WITH 0.1µF AND 0.01µF CAPACITORS.
DECOUPLE AVEE1, AVEE2, AND GVEE SUPPLY PINS.

2.2µF

8
10

2.2µF

6

Maxim Integrated Products

-4.5V

450Ω

20Ω

20Ω

Call toll free 1-800-998-8800 for free samples or literature.

1

155Mbps/622Mbps Clock Recovery and
Data Retiming IC with Fully Integrated
Phase/Frequency Detector

ABSOLUTE MAXIMUM RATINGS

Supply Voltages

VTTL to GND .....................................................-0.5V to +8.0V

to GND.......................................................-0.5V to +8.0V

V

CC

to GND........................................................-8.0V to +0.5V

V

EE

SDIP, SDIN, EXC...................................................-8.0V to +0.5V

RDOP, RDON, RCOP, RCON, CRP.......................-8.0V to +0.5V

EXCS, RST, CRS....................................................-0.5V to +8.0V

FILP, FILG, FILN....................................................-8.0V to +0.5V

MAX3270

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VEE= -4.5V ±5%, VTTL = 5V ±5%, TA= -40°C to +85°C, unless otherwise noted.)

PHADJ, VR ............................................................-8.0V to +8.0V

FM .........................................................................-8.0V to +8.0V

Input Differential Voltage Level, SDIP, SDIN ......................+3.0V

Continuous Power Dissipation (T

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range.............................-55°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

= +85°C).......................1.3W

A

Positive Voltage Supply
(with respect to ground)

Negative Voltage Supply
(with respect to ground)

Static Supply Current from VTTL
Static Supply Current from V

ECL INPUTS: EXC, SDIP, SDIN

Input High Voltage
Input Low Voltage
Input High Current
Input Low Current

ECL OUTPUTS: RCOP, RCON, RDOP, RDON

Output High Voltage
Output Low Voltage

LOW-POWER ECL OUTPUT: CRP

Output High Voltage
Output Low Voltage

TTL INPUTS: CRS, RST, EXCS

Input High Voltage
Input Low Voltage
Input High Current
Input Low Current

PHASE ADJUST INPUTS: PHADJ, VR

Input Bias Current

EE

TTL

EE

TTL
VEE

IH
IL

VIN= VOH(typ)

IH

VIN= VOL(typ)

IL

Loaded with 50Ω to -2V

OH

Loaded with 50Ω to -2V

OL

Loaded with 470Ω to V

OH

Loaded with 470Ω to V

OL

IH

IL

VTTL = 5.00V, VIN = 2V

IH

VTTL = 5.00V, VIN = 0.8V

IL

VR = PHADJ = 0, T

BIAS

CONDITIONS

EE
EE

= +25°C

A

UNITSMIN TYP MAXSYMBOLPARAMETER

V4.75 5.00 5.25V

V-4.725 -4.50 -4.275V

mA2.4 5I
mA150 210I

mV-1165 -870V
mV-1830 -1475V

µA0 100I
nA-100 100I

mV-1025 -955 -870V
mV-1830 -1705 -1550V

mV-1025 -955 -870V
mV-1830 -1705 -1620V

V2V

V0.8V
µA040I
µA040I

µA010I

2 _______________________________________________________________________________________

155Mbps/622Mbps Clock Recovery and

Data Retiming IC with Fully Integrated

Phase/Frequency Detector

AC ELECTRICAL CHARACTERISTICS (continued)

(VEE= -4.5V, VTTL = 5V, TA= 25°C, unless otherwise noted.)

MAX3270

CONDITIONS

UNITSMIN TYP MAXSYMBOLPARAMETER

ECL OUTPUTS: RDOP, RDON, RCOP, RCON

Transition Time 20% to 80%

Loaded with 50Ω to -2V and

f

5pF to GND
Loaded with 50Ω to -2V and

5pF to GND

ps600tr, t

ps100TDTime Difference between RDO and RCO

PFD AND FILTER AMPLIFIER TEST LEVELS

Output Offset Voltage of the
Monitor Amplifier

PHADJ = 0, FILP and FILN shorted mV-35 35V

O

PHADJ = 0
FILP and FILN open

V/V0.95 1.05GFMGain of the Monitor Amplifier
dB21 26GOLFilter Amplifier Open-Loop Voltage Gain

VCO TEST PARAMETERS; CPR OUTPUT

Center Frequency
Frequency Range

Mean Frequency Sensitivity
Frequency Sensitivity to

Power-Supply Voltage

FILP and FILN shorted,

O

PFD = neutral state
FILP - FILN = 1.6V

O

FILP - FILN = 1.6V

O

FILP and FILN shorted

OV

MHz38.00 39.50F
MHz610DF

MHz/V3.75 6K

kHz/V550K

PLL ELECTRICAL SPECIFICATIONS

Frequency of VCO
Incremental Tuning Sensitivity

(Incremental Slope, ∆f/∆Vt)

O

O

ft= 622.08MHz

MHz622.08F

MHz/V75K

mV/rad192KDPhase-Detector Gain

mA/V1.25GmTransconduction Gain of Filter Amplifier

Phase Offset Sensitivity, ∆Φ/∆PHADJ

PHADJ

rad/V2K

__________________________________________Typical Operating Characteristics

VEE SUPPLY CURRENT

190
185
180

175
170
165

SUPPLY CURRENT (mA)

160

EE

V

155
150

-40 80

vs. TEMPERATURE

-4.75V

-4.5V

-4.25V

0 40 60 100-20 20

TEMPERATURE (°C)

_______________________________________________________________________________________ 3

MAX3270-TOC9

CRP FREE-RUNNING FREQUENCY (VCO/16)

39.0

38.9

38.8

38.7

38.6

FREQUENCY (MHz)

38.5

38.4

38.3

vs. DIE TEMPERATURE

0 60 80 100

20 40 50 70 9010 30

TEMPERATURE (°C)

MEASURED

MAX3270-TOC5

155Mbps/622Mbps Clock Recovery and

)

Data Retiming IC with Fully Integrated
Phase/Frequency Detector

__________________________________________Typical Operating Characteristics

10.0

MAX3270

1.0

AMPLITUDE (UI p-p)

0.1
10 1k 10k 100k 1M

10.0

100

JITTER TOLERANCE

(155Mbps, 2

FREQUENCY (Hz)

JITTER TOLERANCE

(622Mbps, 2

23

-1 PRBS)

23

-1 PRBS)

DATA

BELLCORE

MASK

MAX3270-TOC1

MAX3270-TOC2

1.0

AMPLITUDE (UI p-p)

0.1

10 1k 10k 100k 1M

4 _______________________________________________________________________________________

100

FREQUENCY (Hz

DATA

BELLCORE

MASK