Maxim MAX3270EMN Datasheet

_______________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

____________________________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

Pin Configuration appears at end of data sheet.

MAX3270

155Mbps/622Mbps Clock Recovery and

Data Retiming IC with Fully Integrated

Phase/Frequency Detector

________________________________________________________________

Maxim Integrated Products

1

MAX3270

50Ω

50Ω

50Ω

50Ω 50Ω

450Ω

11

+5V

3

4
41
42

13
18
20
14

17219 3839

VTTL

SDIP

RCON

CRP

FILP
FILG

FILN

FM

RCOP

RDOP

RDON

26
25
31
30

2.2µF

20Ω

-4.5V

2.2µF

20Ω

28

9
8
10
6

SDIN
PHADJ

-2V

-2V

-2V

EXCS AND CRS ARE CONNECTED FOR
622Mbps OPERATION.

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

50Ω

50Ω

DVCC

DVCC

AVEE1

AVEE2

GVEE

DVEE

DVEE

DVEE

DVEE

DVEE

DVCC

DVCC

AVCC

AVCC

AVCC

AVCC

OVCC

OVCC

OVCC

OVCC

16 15 57 272932

-2V

+5V

24

VR
EXCS

CRS
RST

EXC

12

-4.5V-4.5V -4.5V

-4.5V

DIGITAL

SUPPLY

ANALOG SUPPLY

1

35 36 22 21 34

___________________________________________________Typical Operating Circuit

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

19-0379; Rev 0; 3/95

PART

MAX3270EMH -40°C to +85°C

TEMP. RANGE PIN-PACKAGE

44 MQFP

______________Ordering Information

MAX3270

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

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.

Supply Voltages

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

V

CC

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

V

EE

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

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

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

A

= +85°C).......................1.3W

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

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

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

VR = PHADJ = 0, T

A

= +25°C

VTTL = 5.00V, VIN = 0.8V

VTTL = 5.00V, VIN = 2V

Loaded with 50Ω to -2V

Loaded with 470Ω to V

EE

Loaded with 470Ω to V

EE

VIN= VOL(typ)

VIN= VOH(typ)

Loaded with 50Ω to -2V

CONDITIONS

µA010I

BIAS

Input Bias Current

µA040I

IL

Input Low Current

µA040I

IH

Input High Current

V0.8V

IL

Input Low Voltage

V2V

IH

Input High Voltage

mV-1830 -1705 -1620V

OL

Output Low Voltage

mV-1025 -955 -870V

OH

Output High Voltage

mV-1830 -1705 -1550V

OL

Output Low Voltage

mA2.4 5I

TTL

Static Supply Current from VTTL

V-4.725 -4.50 -4.275V

EE

V4.75 5.00 5.25V

TTL

Positive Voltage Supply
(with respect to ground)

Negative Voltage Supply
(with respect to ground)

mV-1025 -955 -870V

OH

Output High Voltage

nA-100 100I

IL

Input Low Current

µA0 100I

IH

Input High Current

mA150 210I

VEE

Static Supply Current from V

EE

mV-1165 -870V

IH

Input High Voltage

mV-1830 -1475V

IL

Input Low Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

PHASE ADJUST INPUTS: PHADJ, VR

TTL INPUTS: CRS, RST, EXCS

LOW-POWER ECL OUTPUT: CRP

ECL OUTPUTS: RCOP, RCON, RDOP, RDON

ECL INPUTS: EXC, SDIP, SDIN

MAX3270

155Mbps/622Mbps Clock Recovery and

Data Retiming IC with Fully Integrated

Phase/Frequency Detector

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

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

PHADJ = 0

Loaded with 50Ω to -2V and
5pF to GND

FILP and FILN shorted

FILP - FILN = 1.6V

FILP - FILN = 1.6V

FILP and FILN open

FILP and FILN shorted,
PFD = neutral state

ft= 622.08MHz

CONDITIONS

rad/V2K

PHADJ

Phase Offset Sensitivity, ∆Φ/∆PHADJ

mA/V1.25GmTransconduction Gain of Filter Amplifier

mV/rad192KDPhase-Detector Gain

MHz/V75K

O

Incremental Tuning Sensitivity
(Incremental Slope, ∆f/∆Vt)

MHz622.08F

O

Frequency of VCO

V/V0.95 1.05GFMGain of the Monitor Amplifier

ps600tr, t

f

Transition Time 20% to 80%

kHz/V550K

OV

Frequency Sensitivity to
Power-Supply Voltage

MHz/V3.75 6K

O

Mean Frequency Sensitivity

MHz610DF

O

Frequency Range

dB21 26GOLFilter Amplifier Open-Loop Voltage Gain

MHz38.00 39.50F

O

Center Frequency

UNITSMIN TYP MAXSYMBOLPARAMETER

175

180

185

190

150

-40 80

VEE SUPPLY CURRENT

vs. TEMPERATURE

155

170

MAX3270-TOC9

TEMPERATURE (°C)

V

EE

SUPPLY CURRENT (mA)

0 40 60 100-20 20

165
160

-4.75V

-4.5V

-4.25V

__________________________________________Typical Operating Characteristics

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

O

Output Offset Voltage of the
Monitor Amplifier

Loaded with 50Ω to -2V and
5pF to GND

ps100TDTime Difference between RDO and RCO

ECL OUTPUTS: RDOP, RDON, RCOP, RCON

VCO TEST PARAMETERS; CPR OUTPUT

PLL ELECTRICAL SPECIFICATIONS

PFD AND FILTER AMPLIFIER TEST LEVELS

38.8

38.9

39.0

38.3
0 60 80 100

CRP FREE-RUNNING FREQUENCY (VCO/16)

vs. DIE TEMPERATURE

38.4

38.7

MAX3270-TOC5

TEMPERATURE (°C)

FREQUENCY (MHz)

20 40 50 70 9010 30

38.6

38.5

MEASURED

MAX3270

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

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

0.1
10 1k 10k 100k 1M

JITTER TOLERANCE

(155Mbps, 2

23

-1 PRBS)

1.0

10.0

MAX3270-TOC1

FREQUENCY (Hz)

AMPLITUDE (UI p-p)

100

DATA

BELLCORE

MASK

0.1

10 1k 10k 100k 1M

JITTER TOLERANCE

(622Mbps, 2

23

-1 PRBS)

1.0

10.0

MAX3270-TOC2

FREQUENCY (Hz

)

AMPLITUDE (UI p-p)

100

DATA

BELLCORE

MASK