MAX3272 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – +3.3V, 2.5Gbps Low-Power Limiting Amplifier

19-2269; Rev 3; 11/04
EVAALVUAAILTAIOBNLEKIT
+3.3V, 2.5Gbps Low-Power
Limiting Amplifiers
General Description
The MAX3272/MAX3272A 2.5Gbps limiting amplifiers
accept a wide range of input voltages and provide a
constant-level output voltage with controlled edge
speeds. Additional features include power detectors
with programmable loss-of-signal (LOS) indication, an
optional squelch function that mutes the data output sig-
nal when the input voltage falls below a programmable
threshold, and an output polarity selector. These parts
exhibit excellent jitter performance and have low power
dissipation.
The MAX3272/MAX3272A feature current-mode logic
(CML) data outputs that are tolerant of inductive con-
nectors, and are available in a 4mm ✕ 4mm QFN pack-
age or in die form (MAX3272 only). Along with the
MAX3271, the MAX3272/MAX3272A are ideal for low-
power, compact optical receivers.
Applications
Gigabit Ethernet Optical Receivers
Fibre Channel Optical Receivers
System Interconnects
2.5Gbps Optical Receivers
SONET/SDH Receivers
Features
♦ Single +3.3V Power Supply
♦ 33mA Supply Current
♦ 5ps Deterministic Jitter
♦ 90ps Edge Speed
♦ Output Squelch Function
♦ Programmable Loss-of-Signal Function
♦ CML Output Interface
♦ 20-Pin 4mm ✕ 4mm QFN or Thin QFN Package
♦ Selectable Output Polarity
Ordering Information
PART
TEMP RANGE ^PIN-
PACKAGE
PACKAGE CODE
MAX3272EGP -40°C to +85°C 20 QFN
G2044-3
MAX3272E/D -40°C to +85°C Dice*
—
MAX3272AETP+ -40°C to +85°C 20 Thin QFN T2044-3
MAX3272AEGP -40°C to +85°C 20 QFN
G2044-3
+ Denotes Lead-Free Package.
*Dice are designed and guaranteed to operate from -40°C to
+85°C, but are tested only at T_A = +25°C.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
C_AZ
+3.3V
+3.3V
CAZ1 CAZ2 V_CC
OUTPOL
MAX3272/
MAX3272A
MAX3271
IN+
0.1µF
0.1µF
100Ω
IN-
C_CLOS
CLOS
TH SQUELCH
R_TH
Typical Operating Circuits continue at end of data sheet.
OUT+
OUT-
GND LOS LOS LEVEL
LOSS
OF
SIGNAL
+3.3V
V_CC
SDI+
SDO+
SDO-
MAX3873
CDR ^SCLKO+
SDI-
SCLKO-
GND
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