SN75128 Datasheet, PDF (1/9 Pages) Texas Instruments – EIGHT-CHANNEL LINE RECEIVERS

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• Meets or Exceeds the Requirements of
IBM System 360/370 Input/Output
Specification
• Input Resistance . . . 7 kΩ to 20 kΩ
• Output Compatible With TTL
• Schottky-Clamped Transistors
• Operates From a Single 5-V Supply
• High Speed . . . Low Propagation Delay
• Ratio Specification . . . t_PLH /t_PHL
• Common Strobe for Each Group of Four
Receivers
• SN75128 . . . Active-High Strobes
SN75129 . . . Active-Low Strobes
SN75128, SN75129
EIGHTĆCHANNEL LINE RECEIVERS
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SLLS076B − JANUARY 1977 − REVISED MAY 1995
N PACKAGE
(TOP VIEW)
1S/1S^† ₁
1A ₂
2A ₃
3A 4
4A 5
5A 6
6A 7
7A 8
8A 9
GND 10
20 ^VCC
19 ^1Y
18 ^2Y
17 3Y
16 4Y
15 5Y
14 6Y
13 7Y
12 8Y
11 2S/2S^†
† _{S and S for SN75128 and SN75129, respectively}
description
The SN75128 and SN75129 are eight-channel line receivers designed to satisfy the requirements of the
input-output interface specification for IBM 360/370. Both devices feature common strobes for each group of
four devices. The SN75128 has active-high strobes; the SN75129 has active-low strobes. Special low-power
design and Schottky-diode-clamped transistors allow low supply-current requirements while maintaining fast
switching speeds and high-current TTL outputs.
For new IBM 360/370 interface designs, see the SN751730.
The SN75128 and SN75129 are characterized for operation from 0°C to 70°C.
logic symbols^†
SN75128
1
1S
EN1
11
2S
EN2
1
1S
11
2S
SN75129
EN1
EN2
2
1A
3
2A
4
3A
5
4A
6
5A
7
6A
8
7A
9
8A
19
1
1Y
18
2Y
17
3Y
16
4Y
15
2
5Y
14
6Y
13
7Y
12
8Y
2
1A
3
2A
4
3A
5
4A
6
5A
7
6A
8
7A
9
8A
1
19 _1Y
18 _2Y
17 _3Y
16 _4Y
2
15 _5Y
14 _6Y
13 _7Y
12 _8Y
† _{These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.}
IBM is a trademark of International Business Machines Corp.
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.
Copyright  1995, Texas Instruments Incorporated
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• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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