N8T14 Datasheet: TRIPLE LINE RECEIVERS





N8T14 TRIPLE LINE RECEIVERS Datasheet

Part Number N8T14
Description TRIPLE LINE RECEIVERS
Manufacture etcTI
Total Page 7 Pages
PDF Download Download N8T14 Datasheet PDF

Features: N8T14, SN55122, SN75122 TRIPLE LINE RECE IVERS • Designed for Digital Data Tr ansmission Over Coaxial Cable, Strip Li ne, or Twisted Pair • Designed for Op eration With 50-Ω to 500-Ω Transmis sion Lines • TTL Compatible • Singl e 5-V Supply • Built-Input Threshold Hysteresis • High-Speed . . . Typical Propagation Delay Time = 20 ns • Ind ependent Channel Strobes • Input Gati ng Increases Application Flexibility Fanout to 10 Series 54/74 Standard Lo ads • Can Be Used With Dual Line Driv ers SN55121 and SN75121 • Interchange able With Signetics N8T14 description SLLS075B – D1334, SEPTEMBER 1973 – REVISED FEBRUARY 1993 SN55122 . . . J P ACKAGE N8T14, SN75122 . . . D OR N PACK AGE (TOP VIEW) 1A 1B 2R 2S 2A 2B 2Y GN D 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 VC C 1S 2R 3 2 1 20 19 4 18 1R 2S 5 1 7 1Y NC 6 16 NC 2A 7 15 3A 2B 8 1 4 3S 9 10 11 12 13 2Y GND NC 3Y 3R The N8T14, SN55122, and SN75122 are triple line receive.

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N8T14, SN55122, SN75122
TRIPLE LINE RECEIVERS
Designed for Digital Data Transmission
Over Coaxial Cable, Strip Line, or Twisted
Pair
Designed for Operation With 50-to 500-
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)
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
The N8T14, SN55122, and SN75122 are triple
line receivers that are designed for digital data
transmission over lines having impedances from
50 to 500 . 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 the transmission line in its characteristic impedance to minimize line reflection. An open
line will affect the receiver input as would a low-level voltage. The receiver can withstand a level of – 0.15 V with
power on or off. The other inputs are in TTL configuration. The S input must be high to enable the receiver input.
Two of the line receivers have A and B inputs that, if both are high, will hold the output low. The third receiver
has only an A input that, if high, will hold the output low.
The SN55122 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
N8T14 and SN75122 are characterized for operation from 0°C to 70°C.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
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