19-1927; Rev 0; 2/01
Quad LVDS Line Driver with
Flow-Through Pinout
General Description
The MAX9123 quad low-voltage differential signaling
(LVDS) differential line driver is ideal for applications
requiring high data rates, low power, and low noise. The
MAX9123 is guaranteed to transmit data at speeds up to
800Mbps (400MHz) over controlled impedance media of
approximately 100鈩? The transmission media may be
printed circuit (PC) board traces, backplanes, or cables.
The MAX9123 accepts four LVTTL/LVCMOS input levels
and translates them to LVDS output signals. Moreover,
the MAX9123 is capable of setting all four outputs to a
high-impedance state through two enable inputs, EN and
EN,
thus dropping the device to an ultra-low-power state
of 16mW (typ) during high impedance. The enables are
common to all four transmitters. Outputs conform to the
ANSI TIA/EIA-644 LVDS standard. Flow-through pinout
simplifies PC board layout and reduces crosstalk by sep-
arating the LVTTL/LVCMOS inputs and LVDS outputs.
The MAX9123 operates from a single +3.3V supply and is
specified for operation from -40掳C to +85掳C. It is available
in 16-pin TSSOP and SO packages. Refer to the MAX9121/
MAX9122* data sheet for quad LVDS line receivers with
integrated termination and flow-through pinout.
o
Flow-Through Pinout
Simplifies PC Board Layout
Reduces Crosstalk
o
Pin Compatible with DS90LV047A
o
Guaranteed 800Mbps Data Rate
o
250ps Maximum Pulse Skew
o
Conforms to TIA/EIA-644 LVDS Standard
o
Single +3.3V Supply
o
16-Pin TSSOP and SO Packages
Features
MAX9123
Ordering Information
PART
MAX9123EUE
MAX9123ESE
TEMP. RANGE
-40掳C to +85掳C
-40掳C to +85掳C
PIN-PACKAGE
16 TSSOP
16 SO
Applications
Digital Copiers
Laser Printers
Cell Phone Base
Stations
Add Drop Muxes
Digital Cross-Connects
DSLAMs
Network
Switches/Routers
Backplane
Interconnect
Clock Distribution
Typical Applications Circuit
LVDS SIGNALS
MAX9122*
MAX9123
T
X
107鈩?/div>
R
X
Pin Configuration
TOP VIEW
EN 1
IN1 2
IN2 3
V
CC
4
GND 5
IN3 6
IN4 7
EN 8
16 OUT1-
15 OUT1+
14 OUT2+
LVTTL/CMOS
DATA INPUT
T
X
107鈩?/div>
R
X
LVTTL/CMOS
DATA OUTPUT
T
X
107鈩?/div>
R
X
MAX9123
13 OUT2-
12 OUT3-
11 OUT3+
10 OUT4+
9
OUT4-
100鈩?SHIELDED TWISTED CABLE OR MICROSTRIP PC BOARD TRACES
T
X
107鈩?/div>
R
X
TSSOP/SO
* Future product鈥攃ontact factory for availability.
________________________________________________________________
Maxim Integrated Products
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For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim鈥檚 website at www.maxim-ic.com.
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