19-1927; Rev 0; 2/01
Quad LVDS Line Driver with
Flow-Through Pinout
General Description
Features
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 100Ω. The transmission media may be
printed circuit (PC) board traces, backplanes, or cables.
ꢀ Flow-Through Pinout
Simplifies PC Board Layout
Reduces Crosstalk
ꢀ Pin Compatible with DS90LV047A
ꢀ Guaranteed 800Mbps Data Rate
ꢀ 250ps Maximum Pulse Skew
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.
ꢀ Conforms to TIA/EIA-644 LVDS Standard
ꢀ Single +3.3V Supply
ꢀ 16-Pin TSSOP and SO Packages
Ordering Information
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
16 SO
The MAX9123 operates from a single +3.3V supply and is
specified for operation from -40°C to +85°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.
MAX9123EUE
MAX9123ESE
Typical Applications Circuit
Applications
LVDS SIGNALS
Digital Copiers
Laser Printers
DSLAMs
MAX9122*
MAX9123
Network
Switches/Routers
Cell Phone Base
Stations
Backplane
T
X
107Ω
107Ω
107Ω
107Ω
R
X
Interconnect
Add Drop Muxes
Clock Distribution
Digital Cross-Connects
T
X
T
X
T
X
R
X
R
X
R
X
Pin Configuration
LVTTL/CMOS
DATA INPUT
LVTTL/CMOS
DATA OUTPUT
TOP VIEW
EN
IN1
IN2
1
2
3
4
5
6
7
8
16 OUT1-
15 OUT1+
14 OUT2+
V
CC
MAX9123
13 OUT2-
12 OUT3-
11 OUT3+
10 OUT4+
GND
IN3
IN4
EN
OUT4-
9
TSSOP/SO
100Ω SHIELDED TWISTED CABLE OR MICROSTRIP PC BOARD TRACES
* Future product—contact factory for availability.
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.