SN75122

N8T14, SN55122, SN75122 TRIPLE LINE RECEIVERS Designed for Digital Data Transmission Over Coaxial Cable, Strip Line, or Twisted Pair Designed for Operation With 50-Ω to 500-Ω Transmission Lines TTL Compatible Single 5-V Supply Built-Input Threshold Hysteresis High-Speed . . . Typical Propagation Delay Time = 20 ns Independent Channel Strobes Input Gating Increases Application Flexibility Fanout to 10 Series 54/74 Standard Loads Can Be Used With Dual Line Drivers SN55121 and SN75121 Interchangeable With Signetics N8T14 description SLLS075B – D1334, SEPTEMBER 1973 – REVISED FEBRUARY 1993 SN55122 . . . J PACKAGE N8T14, SN75122 . . . D OR N PACKAGE (TOP VIEW) 1A 1B 2R 2S 2A 2B 2Y GND 1 2 3 4 5 6 7 8 16 VCC 15 1S 14 1R 13 1Y 12 3A 11 3S 10 3R 9 3Y SN55122 . . . FK PACKAGE (TOP VIEW) 1B 1A NC VCC 1S 2R 3 2 1 20 19 4 18 1R 2S 5 17 1Y NC 6 16 NC 2A 7 15 3A 2B 8 14 3S 9 10 11 12 13 2Y GND NC 3Y 3R The N8T14, SN55122, and SN75122 are triple line receivers that are designed for digital data transmission over lines having impedances from 50 Ω to 500 Ω. They are also compatible with standard TTL-logic and supply voltage levels. NC – No internal connection THE N8T14 AND SN75122 ARE NOT RECOMMENDED FOR NEW DESIGN The N8T14, SN55122, and SN75122 have receiver inputs with built-in hysteresis to provide increased noise margin for single-ended systems. The high impedance of this input presents a minimum load to the driver and allows termination of th...