MAX3882A Datasheet, PDF (1/13 Pages) Maxim Integrated Products – 2.488Gbps 1:4 Demultiplexer with Clock and Data Recovery and Limiting Amplifier

19-2718; Rev 2; 4/09
2.488Gbps 1:4 Demultiplexer with Clock and
Data Recovery and Limiting Amplifier
General Description
The MAX3882A is a deserializer combined with clock
and data recovery and limiting amplifier ideal for con-
verting 2.488Gbps serial data to 4-bit-wide, 622Mbps
parallel data for SDH/SONET applications. The device
accepts serial NRZ input data as low as 10mV_P-P of
2.488Gbps and generates four parallel LVDS data out-
puts at 622Mbps. Included is an additional high-speed
serial data input for system loopback diagnostic test-
ing. For data acquisition, the MAX3882A does not
require an external reference clock. However, if need-
ed, the loopback input can be connected to an external
reference clock of 155MHz or 622MHz to maintain a
valid clock output in the absence of input data transi-
tions. Additionally, a TTL-compatible loss-of-lock output
is provided. The device provides a vertical threshold
adjustment to compensate for optical noise generated
by EDFAs in WDM transmission systems. The
MAX3882A operates from a single +3.3V supply and
consumes 610mW.
The MAX3882A’s jitter performance exceeds all SDH/
SONET specifications. The device is available in a 6mm
✕ 6mm, 36-pin TQFN package.
Applications
SDH/SONET Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
SDH/SONET Test Equipment
DWDM Transmission Systems
Typical Application Circuits appear at end of data sheet.
Features
♦ No Reference Clock Required for Data Acquisition
♦ Serial Input Rate: 2.488Gbps
♦ Fully Integrated Clock and Data Recovery with
Limiting Amplifier and 1:4 Demultiplexer
♦ Parallel Output Rate: 622Mbps
♦ Differential Input Range: 10mV_P-P to 1.6V_P-P
without Threshold Adjust
♦ Differential Input Range: 50mV_P-P to 600mV_P-P
with Threshold Adjust
♦ 0.65UI High-Frequency Jitter Tolerance
♦ Loss-of-Lock (LOL) Indicator
♦ Wide Input Threshold Adjust Range: ±170mV
♦ Maintain Valid Clock Output in Absence of Data
Transitions
♦ System Loopback Input Available for System
Diagnostic Testing
♦ Operating Temperature Range -40°C to +85°C
♦ Low Power Dissipation: 610mW at +3.3V
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3882AETX+
-40°C to +85°C
36 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
27 26 25 24 23 22 21 20 19
V_CC_OUT 28
GND 29
FREFSET 30
V_CC 31
V_CC 32
CAZ+ 33
MAX3882A
CAZ- 34
V_REF 35
*EP
V_CTRL 36
+
12 34 56789
18 PCLK+
17 PCLK-
16 GND
15 V_CC_OUT
14 V_CC_VCO
13 FIL
12 V_CC_VCO
11 GND
10 LREF
*EXPOSED PAD.
TQFN
________________________________________________________________ Maxim Integrated Products 1
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.