MAX3873AEGP

Manufacturer Part NumberMAX3873AEGP
DescriptionTimers & Support Products Low-Power, Compact 2 .5-2.7Gbps Clock Rec
ManufacturerMaxim Integrated Products
TypeClock Recovery
MAX3873AEGP datasheet
 

Specifications of MAX3873AEGP

Supply Voltage (max)3.6 VSupply Voltage (min)3 V
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTSupply Current112 mA
Package / CaseQFN-20 EPDc0509
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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19-2577; Rev 2; 5/07
Low-Power, Compact 2.5Gbps/2.7Gbps
Clock-Recovery and Data-Retiming IC
General Description
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.
Switch Matrix Backplanes
SDH/SONET Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
SDH/SONET Test Equipment
DWDM Transmission Systems
Pin Configuration
TOP VIEW
RATESET
1
V
2
CC
SDI+
3
MAX3873A
SDI-
4
V
5
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
♦ Clock Jitter Generation: 5mUI
♦ Exceeds ANSI, ITU, and Bellcore SDH/SONET
Jitter Specifications
♦ 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
Applications
PART
MAX3873AEGP
M AX 3873AE TP +
+ Denotes lead-free package.
15
SDO+
Typical Application Circuit appears at end of data sheet.
14
SDO-
13
VCC_BUF
12
SCLKO+
11
SCLKO-
Features
RMS
to 1.6V
P-P
P-P
Ordering Information
PIN-
PKG
TEMP RANGE
PACKAGE
CODE
20 QFN
-40°C to +85°C
G2044-3
(4mm x 4mm)
20 TQFN
-40°C to +85°C
T2044-3
(4mm x 4mm)
1

MAX3873AEGP Summary of contents

  • Page 1

    ... 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 Applications PART MAX3873AEGP M AX 3873AE Denotes lead-free package. 15 SDO+ Typical Application Circuit appears at end of data sheet. 14 ...

  • 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 ...