19-2197; Rev 0; 10/01
2.7Gbps Dual Mux/Buffer with Loopback
General Description
The MAX3783 is a dual serial multiplexer (mux) and
buffer with selectable line-side loopback for system
interconnect and serial backplane applications up to
2.7Gbps. Each independent channel consists of a trans-
mitter with fanout of two and a receiver with a 2:1 input
mux. Selectable loopback paths support system testing.
Operating from a single 3.3V supply, this device has
current-mode logic (CML) inputs and outputs, which
can be AC-coupled for PECL compatibility, if desired.
The IC is packaged in a compact 48-pin TQFP-EP pack-
age with exposed pad. Typical power consumption is
1.12W.
o
Provides Redundant Serial I/O
o
11ps Deterministic Jitter
o
Selectable Loopback
o
On-Chip 50鈩?Termination Resistors
o
3.3V Power Supply
o
Two-Port Integration
Features
MAX3783
Applications
2.7Gbps Serial Communications
System Interconnect
Serial Backplane
Fail-Over and Protection Switching
PART
MAX3783UCM
Ordering Information
TEMP. RANGE
0掳C to +85掳C
PIN-PACKAGE
48 TQFP-EP*
* Exposed pad
Pin Configuration
SOA+
SOA-
V
CC
LO1A+
LO1A-
46
45
44
43
42
48
47
41
40
39
38
GND
SIA-
SIA+
V
CC
LB1A
LB2A
LB1B
LB2B
V
CC
SIB+
SIB-
GND
37
36
35
34
33
32
31
30
29
28
27
26
25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
V
CC
LO2A+
LO2A-
V
CC
GND
SELA
V
CC
Typical Application Circuit appears at end of data sheet.
MAX3783
LI2A+
LI2A-
V
CC
LI1A+
LI1A-
GND
GND
LI1B-
LI1B+
V
CC
LI2B-
LI2B+
V
CC
LO1B+
LO1B-
V
CC
LO2B+
LO2B-
SELB
V
CC
SOB+
SOB-
TQFP-EP*
*EXPOSED PAD MUST BE SOLDERED TO
SUPPLY GROUND ON THE CIRCUIT BOARD
________________________________________________________________
Maxim Integrated Products
V
CC
GND
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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