MAX3873AETP+T Maxim Integrated Products, MAX3873AETP+T Datasheet

IC RECOV/RETIME 2.5GBPS 20TQFN

MAX3873AETP+T

Manufacturer Part Number
MAX3873AETP+T
Description
IC RECOV/RETIME 2.5GBPS 20TQFN
Manufacturer
Maxim Integrated Products
Type
Clock and Data Recovery (CDR)r
Datasheet

Specifications of MAX3873AETP+T

Input
CML
Output
CML
Frequency - Max
2.67GHz
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TQFN Exposed Pad
Frequency-max
2.67GHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3873A is a compact, low-power 2.488Gbps/
2.67Gbps clock-recovery and data-retiming IC for
SDH/SONET applications. The phase-locked loop (PLL)
recovers a synchronous clock signal from the serial NRZ
data input. The input data is then retimed by this recov-
ered clock, providing a clean data output. The MAX3873A
meets all SDH/SONET jitter specifications, does not
require an external reference clock to aid in frequency
acquisition, and provides excellent tolerance to both
deterministic and sinusoidal jitter. The MAX3873A pro-
vides a PLL loss-of-lock (LOL) output to indicate whether
the CDR is in lock. The recovered data and clock outputs
are CML with on-chip 50Ω back terminations on each line.
The clock output can be powered down if not used.
The MAX3873A is implemented in Maxim’s second-gener-
ation SiGe process and consumes only 260mW at 3.3V
supply (output clock disabled, low output swing). The
device is available in a 4mm x 4mm 20-pin QFN
exposed-pad package and operates from -40°C to +85°C.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-2577; Rev 2; 5/07
**NOTE: THE EXPOSED PAD MUST BE
TOP VIEW
SOLDERED TO THE SUPPLY GROUND.
Switch Matrix Backplanes
SDH/SONET Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
SDH/SONET Test Equipment
DWDM Transmission Systems
RATESET
SDI+
SDI-
V
V
CC
CC
1
2
3
4
5
________________________________________________________________ Maxim Integrated Products
Low-Power, Compact 2.5Gbps/2.7Gbps
General Description
QFN/TQFN**
Clock-Recovery and Data-Retiming IC
MAX3873A
Pin Configuration
Applications
15
14
13
12
11
SDO+
SDO-
VCC_BUF
SCLKO+
SCLKO-
♦ Fully Integrated Clock Recovery and Data
♦ Power Dissipation: 260mW with +3.3V Supply
♦ Clock Jitter Generation: 5mUI
♦ Exceeds ANSI, ITU, and Bellcore SDH/SONET
♦ Differential Input Range: 50mV
♦ Single +3.3V Power Supply
♦ PLL Fast Track (FASTRACK) Mode Available
♦ Clock Output Can Be Disabled
♦ Input Data Rate: 2.488Gbps or 2.67Gbps
♦ Selectable Output Amplitude
♦ Tolerates 2000 Consecutive Identical Digits
♦ Loss-of-Lock Indicator
♦ Differential CML Data and Clock Outputs
♦ Operating Temperature Range: -40°C to +85°C
+ Denotes lead-free package.
Typical Application Circuit appears at end of data sheet.
MAX3873AEGP
M AX 3873AE TP +
Retiming
Jitter Specifications
PART
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
PIN-
PACKAGE
20 QFN
(4mm x 4mm)
20 TQFN
(4mm x 4mm)
RMS
P-P
to 1.6V
Features
P-P
PKG
CODE
G2044-3
T2044-3
1

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MAX3873AETP+T Summary of contents

Page 1

... CC QFN/TQFN** **NOTE: THE EXPOSED PAD MUST BE SOLDERED TO THE SUPPLY GROUND. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ Fully Integrated Clock Recovery and Data Retiming ♦ Power Dissipation: 260mW with +3.3V Supply ♦ ...

Page 2

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming IC ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ..............................................-0.5V to +5.0V CC Voltage at SDI± .............................. (V CC CML Output Current at SDO±, SCLKO± ............................22mA Voltage at LOL, FASTRACK, FIL±, SCLKEN MODE, RATESET...................................-0.5V ...

Page 3

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming IC AC ELECTRICAL CHARACTERISTICS (V = 3.0V to 3.6V 0.022µ -40°C to +85°C. Typical values are noted.) (Note 4) PARAMETER SYMBOL Serial Input ...

Page 4

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming IC AC ELECTRICAL CHARACTERISTICS (continued 3.0V to 3.6V 0.022µ -40°C to +85°C. Typical values are noted.) (Note 4) Note 1: At ...

Page 5

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming +25°C, unless otherwise noted.) A RECOVERED CLOCK AND DATA (2.488Gbps 125mV/div RECOVERED CLOCK JITTER (2.488Gbps) JITTER TRANSFER 0.5 0 -0.5 -1.0 -1.5 BELLCORE MASK -2.0 -2.5 ...

Page 6

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming +25°C, unless otherwise noted.) A PULLIN RANGE (RATESET = 0) 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 -50 0 AMBIENT TEMPERATURE (°C) JITTER TOLERANCE vs. ...

Page 7

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming IC PIN NAME C l ock Outp ut E nab l e, TTL Inp ut. W hen S C LKE LKE ...

Page 8

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming IC The loop filter output controls the on-chip LC VCO run- ning at either 2.488GHz or 2.67GHz. The VCO provides low phase noise and is trimmed to the correct frequency. Clock jitter ...

Page 9

Low-Power, Compact 2.5Gbps or 2.7Gbps Clock-Recovery and Data-Retiming IC Sinusoidal Jitter Tolerance and Input Deterministic Jitter Trade-Offs The MAX3873A has excellent jitter tolerance. Adding DJ to the input will close the eye opening and result in reduced sinusoidal jitter tolerance. ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 _____________________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products ...

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