AS1156/AS1154

Single/Dual LV DS Driver

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1 General Description

The AS1156/AS1154 is a Single/Dual Flow-Through

LVDS (Low-Voltage Differential Signaling) Line Driver

which accepts and converts LVTTL/LVCMOS input lev-

els into LVDS output signals. The device is perfect for

low-power low-noise applications requiring high signal-

ing rates and reduced EMI emissions.

The device is guaranteed to transmit data at speeds up

to 800Mbps (400MHz) over controlled impedance media

of approximately 100

Ω. Supported transmission media

are PCB traces, backplanes, and cables.

The AS1156 is a single LVDS transmitter, and the

AS1154 is a dual LVDS transmitter.

Outputs conform to the ANSI TIA/EIA-644 LVDS stan-

dards. Flow-through pinout simplifies PC board layout

and reduces crosstalk by separating the LVTTL/LVC-

MOS inputs and LVDS outputs.

The AS1156/AS1154 operates from a single +3.3V sup-

ply and is specified for operation from -40 to +85°C.

Figure 1. Block Diagram

2 Key Features

!

Flow-Through Pinout

!

Guaranteed 800Mbps Data Rate

!

250ps Pulse Skew (Max)

!

Conforms to ANSI TIA/EIA-644 LVDS Standards

!

Single +3.3V Supply

!

Operating Temperature Range: -40 to +85°C

!

8-Pin SOIC Package

3 Applications

Digital Copiers, Laser Printers, Cellular Phone Base Sta-

tions, Add/Drop Muxes, Digital Cross-Connects,

DSLAMs, Network Switches/Routers, Backplane Inter-

connect, Clock Distribution Computers, Intelligent Instru-

ments, Controllers, Critical Microprocessors and

Microcontrollers, Power Monitoring, and Portable/Bat-

tery-Powered Equipment.

AS1156

IN1

N/C

GND

OUT1-

OUT1+

N/C

N/C

AS1154

IN1

IN2

GND

OUT1-

OUT1+

OUT2+

OUT2-

Tx

Tx

Tx