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SN55121

Texas Instruments
Part Number SN55121
Manufacturer Texas Instruments
Description DUAL LINE DRIVERS
Published Oct 4, 2019
Detailed Description D Designed for Digital Data Transmission Over 50-Ω to 500-Ω Coaxial Cable, Strip Line, or Twisted Pair D High Speed tpd ...
Datasheet PDF File SN55121 PDF File

SN55121
SN55121

Overview
D Designed for Digital Data Transmission Over 50-Ω to 500-Ω Coaxial Cable, Strip Line, or Twisted Pair D High Speed tpd = 20 ns Maximum at CL = 15 pF D TTL Compatible With Single 5-V Supply D 2.
4-V Output at IOH = – 75 mA D Uncommitted Emitter-Follower Output Structure for Party-Line Operation D Short-Circuit Protection D AND-OR Logic Configuration D Designed for Use With Triple Line Receivers SN55122, SN75122 D Designed to Be Interchangeable With Signetics N8T13 description The SN55121 and SN75121 dual line drivers are designed for digital data transmission over lines having impedances from 50 to 500 Ω.
They are also compatible with standard TTL logic and supply-voltage levels.
The low-impedance emitter-follower outputs of the SN55121 and SN75121 can drive terminated lines such as coaxial cable 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 of the inputs are in conventional TTL configuration and the gating can be used during power-up and power-down sequences to ensure that no noise is introduced to the line.
The SN55121 is characterized for operation over the full military temperature range of – 55°C to 125°C.
The SN75121 is characterized for operation from 0°C to 70°C.
SN55121, SN75121 DUAL LINE DRIVERS SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998 SN55121 .
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J PACKAGE SN75121 .
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D OR N PACKAGE (TOP VIEW) 1A 1B 1C 1D 1E 1F 1Y GND 1 2 3 4 5 6 7 8 16 VCC 15 2F 14 2E 13 2D 12 2C 11 2B 10 2A 9 2Y SN55121 .
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FK PACKAGE (TOP VIEW) 1B 1A NC VCC 2F 1C 3 2 1 20 19 4 18 2E 1D 5 17 2D NC 6 16 NC 1E 7 15 2C 1F 8 14 2B 9 10 11 12 13 1Y GND NC 2Y 2A NC – No internal connection THE SN75121 IS NOT RECOMMENDED FOR NEW DESIGNS Please be aware that an important notice concerning availability, standard warranty, and use in critical applica...


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