19-1523; Rev 4, 7/01
3.0V to 5.5V, 1.25Gbps/2.5Gbps
Limiting Amplifiers
General Description
The 1.25Gbps MAX3264/MAX3268 and the 2.5Gbps
MAX3265/MAX3269/MAX3765 limiting amplifiers are
designed for Gigabit Ethernet and Fibre Channel optical
receiver systems. The amplifiers accept a wide range of
input voltages and provide constant-level output volt-
ages with controlled edge speeds. Additional features
include RMS power detectors with programmable loss-
of-signal (LOS) indication, an optional squelch function
that mutes the data output signal when the input voltage
falls below a programmable threshold, and excellent jit-
ter performance.
The MAX3264/MAX3265/MAX3765 feature current-
mode logic (CML) data outputs that are tolerant of
inductive connectors and a 16-pin TSSOP package,
making these circuits ideal for GBIC receivers. The
MAX3268/MAX3269 feature standards-compliant posi-
tive-referenced emitter-coupled logic (PECL) data out-
puts and are available in a tiny 10-pin 碌MAX package
that is ideal for small-form-factor receivers.
o
+3.0V to +5.5V Supply Voltage
o
Low Deterministic Jitter
14ps (MAX3264)
11ps (MAX3265/MAX3765)
o
150ps (max) Edge Speed (MAX3265/MAX3765)
300ps (max) Edge Speed (MAX3264)
o
Programmable Signal-Detect Function
o
Choice of CML or PECL Output Interface
o
10-Pin 碌MAX or 16-Pin TSSOP Package
Features
MAX3264/MAX3265/MAX3268/MAX3269/MAX3765
Ordering Information
PART
MAX3264CUE
MAX3264C/D
MAX3265CUE
MAX3265CUB
MAX3265C/D
MAX3265EUE
MAX3268CUB
MAX3268C/D
MAX3269CUB
MAX3269C/D
TEMP. RANGE
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
PIN-PACKAGE
16 TSSOP-EP
鈥?/div>
Dice*
16 TSSOP-EP
鈥?/div>
10 碌MAX-EP
鈥?/div>
Dice*
16 TSSOP-EP
鈥?/div>
10 碌MAX-EP
鈥?/div>
Dice*
10 碌MAX-EP
鈥?/div>
Dice*
Applications
Gigabit Ethernet Optical Receivers
Fibre Channel Optical Receivers
System Interconnect
ATM Optical Receivers
Selector Guide appears at end of data sheet.
Pin Configurations appear at end of data sheet.
MAX3765CUB
0擄C to +70擄C
10 碌MAX-EP
鈥?/div>
*Dice
are designed to operate from 0擄C to +70擄C, but are tested
and guaranteed only at T
A
= +25擄C.
鈥?/div>
EP = Exposed paddle
Typical Operating Circuits
C
AZ
V
CC
V
CC
CAZ1
CAZ2
V
CC
C
IN
0.01碌F
IN+
100鈩?/div>
IN-
MAX3264CUE
MAX3265CUE
MAX3265EUE
OUT+
R
TERM
0.01碌F
OUT-
0.01碌F
R
L
100鈩?/div>
MAX3266
MAX3267
C
IN
0.01碌F
TH
SQUELCH
LOS
LOS
LEVEL
V
CC
R
TH
N.C.
LOSS
OF
SIGNAL
N.C.
N.C.
R
TERM
Typical Operating Circuits continued at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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