Texas Instruments SN75124D, SN75124N, SN75124NS Datasheet

SN75124
TRIPLE LINE RECEIVER
SLLS058B – SEPTEMBER 1973 – REVISED MA Y 1995
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
D
Meets or Exceeds the Requirements of IBM System 360 Input/Output Interface Specification
D
Operates From Single 5-V Supply
D
TTL Compatible
D
Built-In Input Threshold Hysteresis
D
High Speed . . . Typical Propagation Delay Time = 20 ns
D
Independent Channel Strobes
D
Input Gating Increases Application Flexibility
D
Designed for Use With Dual Line Driver SN75123
D
Designed to Be Interchangeable With Signetics N8T24
description
The SN75124 triple line receiver is specifically designed to meet the input/output interface specifications for IBM System 360. It is also compatible with standard TTL logic and supply voltage levels.
The SN75124 has receiver inputs with built-in hysteresis to provide increased noise margin for single-ended systems. An open line affects the receiver input as does a low-level input voltage, and the receiver input 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, hold the output low. The third receiver has only an A input that, if high, holds the output low.
See the SN751730 for new IBM 360/370 interface designs. The SN75124 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUT
A
B
R S
OUTPUT
Y
H H X X L X XLH L LXHX H LXXL H XLHX H XLXL H
B input and last two lines of the function table are applicable to receivers 1 and 2 only.
Copyright 1995, Texas Instruments Incorporated
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.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10
9
1A 1B 2R 2S 2A 2B 2Y
GND
V
CC
1S 1R 1Y 3A 3S 3R 3Y
D OR N PACKAGE
(TOP VIEW)
IBM is a trademark of International Business Machines Corp.
SN75124 TRIPLE LINE RECEIVER
SLLS058B – SEPTEMBER 1973 – REVISED MA Y 1995
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
logic symbol
2Y
15
12
11
10
6
5
4
3
2
1
14
3Y
1Y
9
7
13
3A
3S
3R
2B
2A
2S
2R
1B
1A
1S
1R
1
&
&
&
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
1
logic diagram (positive logic)
3A
3S
3R
2B
2A
2S
2R
1B
1A
1S
1R
9
7
13
1Y
2Y
3Y
12
11
10
6
5
4
3
2
1
15
14
schematic (each receiver)
58
13, 7, 9
Y
800 4 k
4 k
A
B
1, 5, 12 2, 6
S
15, 4, 11
16
V
CC
14, 3, 10
R
8
GND
...VCC bus
To Other
Receivers
V
V
V
V
To Other
Receivers
B input is provided on receivers 1 and 2 only
Resistor values shown are nominal.
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