SN75ALS121DUAL LINE DRIVER

SLLS030A - D1334, SEPTEMBER 1987 - REVISED AUGUST 1989

features

Permits Digital Data Transmission Over Coaxial Cable, Strip Line, or Twisted Pair
Operates With 50- to 500- Transmission Lines
TTL Compatible With 5-V Supply
2.4-V Output at I_OH= -75 mA
Uncommitted Emitter-Follower Output Structure for Party-Line Operation
IMPACT^TM Low-Power Schottky Technology
Improved Replacement for the SN75121 and Signetics 8T13
Glitchless Power Up/Power Down
Short-Circuit Protection
AND-OR Logic Configuration
High Speed...Maximum Propagation Delay Time of 14 ns at C_L = 15 pF

description

The SN75ALS121 dual line driver is designed for digital data transmission over lines having impedances from 50 to 500 . It is compatible with standard TTL logic and supply voltage levels.

The low-impedance emitter-follower outputs drive terminated lines such as coaxial cable, strip line, or twisted pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops below approximately 1.5 V. All inputs are in conventional TTL configuration. Gating can be used during power-up and power-down sequences to ensure that no noise is introduced on the line.

The SN75ALS121 employs the IMPACT^TM process to achieve fast switching speeds, low power dissipation, and reduced input current requirements.

The SN75ALS121 is characterized for operation from 0°C to 70°C.

Title: DUAL LINE DRIVER
Product Family: TRANSMITTERS AND RECEIVERS
Device Functionality: DUAL LINE DRIVER
Orderable Devices: SN75ALS121N

View the complete PDF datasheet: slls030a.pdf (73 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN75ALS121

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