19-1523; Rev 6, 5/04
+3 .0 V t o +5 .5 V, 1 .2 5 Gb p s /2 .5 Gb p s
Lim it in g Am p lifie rs
Ge n e ra l De s c rip t io n
Fe a t u re s
The 1.25Gbps MAX3264/MAX3268/MAX3768 and the
2.5Gbps MAX3265/MAX3269/MAX3765 limiting ampli-
fie rs a re d e s ig ne d for Gig a b it Ethe rne t a nd Fib re
Channel optical receiver systems. The amplifiers accept
a wide range of input voltages and provide constant-
le ve l output volta ge s with c ontrolle d e dge spe e ds.
Additional features include RMS power detectors with
p rog ra mma b le los s -of-s ig na l (LOS) ind ic a tion, a n
optional squelch function that mutes the data output sig-
nal when the input voltage falls below a programmable
threshold, and excellent jitter performance.
♦ +3.0V to +5.5V Supply Voltage
♦ Low Deterministic Jitter
14ps (MAX3264)
11ps (MAX3265/MAX3765)
♦ 150ps (max) Edge Speed (MAX3265/MAX3765)
300ps (max) Edge Speed (MAX3264)
♦ Programmable Signal-Detect Function
♦ Choice of CML or PECL Output Interface
♦ 10-Pin µMAX or 16-Pin TSSOP Package
Ord e rin g In fo rm a t io n
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
c irc uits id e a l for GBIC re c e ive rs . The MAX3268/
MAX3269/MAX3768 feature standards-compliant posi-
tive-referenced emitter-coupled logic (PECL) data out-
puts and are available in a tiny 10-pin µMAX package
that is ideal for small-form-factor (SFF) receivers.
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
PIN-PACKAGE
16 TSSOP-EP*
16 TSSOP-EP*
Dice**
MAX3264CUE
MAX3264CUE+
MAX3264C/D
MAX3265CUE
MAX3265CUE+
MAX3265CUB
MAX3265CUB+
MAX3265EUE
MAX3265EUE+
MAX3265C/D
16 TSSOP-EP*
16 TSSOP-EP*
10 µMAX-EP*
10 µMAX-EP*
16 TSSOP-EP*
16 TSSOP-EP*
Dice**
Ap p lic a t io n s
Gigabit Ethernet Optical Receivers
Fibre Channel Optical Receivers
System Interconnect
ATM Optical Receivers
+Denotes lead-free package.
*EP = Exposed paddle.
**Dice are designed to operate from 0°C to +70°C, but are tested
and guaranteed only at T = +25°C.
A
Selector Guide appears at end of data sheet.
Pin Configurations appear at end of data sheet.
Ordering Information continued at end of data sheet.
Typ ic a l Op e ra t in g Circ u it s
C
AZ
V
CC
V
CC
V
CC
CAZ1
CAZ2
MAX3264CUE
MAX3265CUE
MAX3265EUE
R
TERM
C
IN
0.01µF
0.01µF
OUT+
OUT-
IN+
IN-
R
100Ω
L
100Ω
0.01µF
MAX3266
MAX3267
C
IN
0.01µF
R
TERM
LOS
N.C.
TH SQUELCH
N.C.
LOS
LEVEL
N.C.
V
CC
R
TH
LOSS
OF
SIGNAL
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’s website at www.maxim-ic.com.