MAX9121

Integrated Termination Eliminates Four External Resistors (MAX9122)
Flow-Through Pinout Simplifies PC Board Layout Reduces Crosstalk
Pin Compatible with DS90LV048A
Guaranteed 500Mbps Data Rate
300ps Pulse Skew (max)
Conform to ANSI TIA/EIA-644 LVDS Standard
Single +3.3V Supply
Fail-Safe Circuit

Digital Copiers Laser Printers Cellular Phone Base Stations Add/Drop Muxes Digital Cross-Connects DSLAMs Network Switches/Routers Backplane Interconnect Clock Distribution

VCC to GND...............................................................................-0.3V to +4.0V
IN_+, IN_- to GND ....................................................................-0.3V to +4.0V
EN, EN to GND................................................................-0.3V to (VCC + 0.3V)
OUT_ to GND .................................................................-0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
16-Pin TSSOP (derate 9.4mW/°C above +70°C) ..............................755mW
16-Pin SO (derate 8.7mW/°C above +70°C).....................................696mW
Storage Temperature Range .............................................-65°C to +150°C
Maximum Junction Temperature ........................................................+150°C
Operating Temperature Range ............................................-40°C to +85°C
Lead Temperature (soldering, 10s) ...................................................+300°C
ESD Protection
(Human Body Model, IN_+, IN_-) ............................................................±8kV

The MAX9121/MAX9122 quad low-voltage differential signaling (LVDS) differential line receivers are ideal for applications requiring high data rates, low power, and low noise. The MAX9121/MAX9122 are guaranteed to receive data at speeds up to 500Mbps (250MHz) over controlledimpedance media of approximately 100. The transmission media may be printed circuit (PC) board traces or cables.

The MAX9121/MAX9122 accept four LVDS differential inputs and translate them to LVCMOS outputs. The MAX9122 features integrated parallel termination resistors (nominally 107), which eliminate the requirement for four discrete termination resistors and reduce stub lengths. The MAX9121 inputs are high impedance and require an external termination resistor when used in a point-to-point connection.

The MAX9121 support a wide common-mode input range of 0.05V to 2.35V, allowing for ground potential differences and common-mode noise between the driver and the receiver. A fail-safe feature sets the output high when the inputs are open, or when the inputs are undriven and shorted or parallel terminated. The EN and EN inputs of MAX9121 control the high-impedance output. The enables are common to all four receivers. Inputs conform to the ANSI TIA/EIA- 644 LVDS standard. Flow-through pinout simplifies PC board layout and reduces crosstalk by separating the LVDS inputs and LVCMOS outputs. The MAX9121/ MAX9122 operate from a single +3.3V supply, and are specified for operation from -40°C to +85°C. These devices are available in 16-pin TSSOP and SO packages. Refer to the MAX9123 data sheet for a quad LVDS line driver ith flow-through pinout.