MAX9129 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Quad Bus LVDS Driver with Flow-Through Pinout

19-2100; Rev 0; 8/01
Quad Bus LVDS Driver with
Flow-Through Pinout
General Description
The MAX9129 is a quad bus low-voltage differential sig-
naling (BLVDS) driver with flow-through pinout. This
device is designed to drive a heavily loaded multipoint
bus with controlled transition times (1ns 0% to 100%
minimum) for reduced reflections. The MAX9129
accepts four LVTTL/LVCMOS input levels and trans-
lates them to output levels of 250mV to 450mV (stan-
dard LVDS levels) into a 27Ω load at speeds up to
200Mbps (100MHz).
The power-on reset ensures that all four outputs are
disabled and high impedance during power up and
power down. The outputs can be set to high imped-
ance by two enable inputs, EN and EN, thus dropping
the device to a low-power state of 11mW. The enables
are common to all four drivers. The flow-through pinout
simplifies PC board layout and reduces crosstalk by
keeping the LVTTL/LVCMOS inputs and BLVDS outputs
separated.
The MAX9129 operates from a single +3.3V supply and
is specified for operation from -40°C to +85°C. It is
available in 16-pin QFN and TSSOP packages. Refer to
the MAX9121 data sheet for a quad LVDS line receiver
with flow-through pinout.
Cell Phone Base Stations
Add/Drop Muxes
Digital Cross-Connects
DSLAMs
Network Switches/Routers
Backplane Interconnect
Clock Distribution
Applications
Features
o Drive LVDS Levels into a 27Ω Load
o 1ns (0% to 100%) Minimum Transition Time
Reduces Reflections
o Guaranteed 200Mbps (100MHz) Data Rate
o Enable Pins for High-Impedance Output
o High-Impedance Outputs when Powered Off
o Glitch-Free Power-Up and Power-Down
o Hot Swappable
o Flow-Through Pinout
o Available in Tiny QFN Package (50% Smaller
than TSSOP)
o Single +3.3V Supply
PART
MAX9129EGE
MAX9129EUE
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QFN
16 TSSOP
Functional Diagram appears at end of data sheet.
Pin Configurations appear at end of data sheet.
Typical Applications Circuit
CARD 1A
MAX9129
MAX9121
CARD 10A
MAX9129
MAX9121
CARD 1B
MAX9129
MAX9121
CARD 2B
MAX9129
MAX9121
BUS A
R_t
BUS B
R_t
MULTIPOINT FULL-DUPLEX TRANSMIT AND RECEIVE BUS
R_t
= TERMINATION
R_t
RESISTOR
R_t
________________________________________________________________ Maxim Integrated Products 1
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