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SN75125, SN75127
SEVEN CHANNEL LINE RECEIVERS
SLLS108B − D239, JANUARY 1977 − REVISED FEBRUARY 1993
•
•
•
•
•
•
•
•
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Meets IBM 360/370 I/O Specification
Input Resistance . . . 7 kΩ to 20 kΩ
Output Compatible With TTL
Schottky-Clamped Transistors
Operates From Single 5-V Supply
High Speed . . . Low Propagation Delay
Ratio Specification for Propagation Delay
Time, Low-to-High/High-to-Low
Seven Channels in One 16-Pin Package
Standard V
CC
and Ground Positioning on
SN75127
SN75125 . . . D OR N PACKAGE
(TOP VIEW)
1A
2A
3A
4A
5A
6A
7A
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1Y
V
CC
3Y
4Y
5Y
6Y
7Y
2Y
SN75127 . . . D OR N PACKAGE
description
The SN75125 and SN75127 are monolithic
seven-channel line receivers designed to satisfy
the requirements of the IBM System 360/370
input/output interface specifications. Special
low-power design and Schottky-clamped
transistors allow for low supply-current
requirements while maintaining fast switching
speeds and high-current TTL outputs.
The SN75125 and SN75127 are characterized for
operation from 0°C to 70°C.
1A
2A
3A
4A
5A
6A
7A
GND
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
1Y
2Y
3Y
4Y
5Y
6Y
7Y
THE SN75125 IS NOT
RECOMMENDED FOR NEW DESIGN
logic symbols
†
SN75125
1A
2A
3A
4A
5A
6A
7A
1
2
3
4
5
6
7
16 1Y
9 2Y
14 3Y
13 4Y
12 5Y
11 6Y
10 7Y
1A
2A
3A
4A
5A
6A
7A
1
2
3
4
5
6
7
SN75127
15 1Y
14 2Y
13 3Y
12 4Y
11 5Y
10 6Y
9 7Y
† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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
1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
2−1
SN75125, SN75127
SEVEN CHANNEL LINE RECEIVERS
SLLS108B − D239, JANUARY 1977 − REVISED FEBRUARY 1993
schematic (each receiver)
Common Circuitry
VCC
150
Ω
NOM
To Other
Channels
A
Input
Y
Output
12 kΩ
NOM
GND
To Other
Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage range: SN75125 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.15 V to 7 V
SN75127 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 2 V to 7 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
NOTES: 1. All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
D
N
TA
≤
25°C
POWER RATING
950 mW
1050 mW
OPERATING FACTOR
ABOVE TA = 25°C
7.6 mW/°C
9.2 mW/°C
TA = 70°C
POWER RATING
608 mW
736 mW
2−2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
SN75125, SN75127
SEVEN CHANNEL LINE RECEIVERS
SLLS108B − D239, JANUARY 1977 − REVISED FEBRUARY 1993
recommended operating conditions
MIN
Supply voltage, VCC
High-level input voltage, VIH
Low-level input voltage, VIL
High-level output current, IOH
Low-level output current, IOL
Operating free-air temperature, TA
0
4.5
1.7
0.7
−0.4
16
70
NOM
5
MAX
5.5
UNIT
V
V
V
mA
mA
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VOH
VOL
IIH
IIL
IOS
ri
ICC
High-level output voltage
Low-level output voltage
High-level input current
Low-level input current
Short-circuit output current‡
Input resistance
Supply current
VCC = 4.5 V,
VCC = 4.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
TEST CONDITIONS
VIL = 0.7 V,
VIH = 1.7 V,
VI = 3.11 V
VI = 0.15 V
VO = 0
∆V
I = 0.15 V to 4.15 V
All inputs at 0.7 V
All inputs at 4 V
−18
7
15
28
IOH = − 0.4 mA
IOL = 16 mA
MIN
2.4
TYP†
3.1
0.4
0.3
0.5
0.42
30
−60
20
25
47
MAX
UNIT
V
V
mA
µA
mA
kΩ
mA
mA
VCC = 4.5 V, 0 V, or open,
VCC = 5.5 V,
IOH = − 0.4 mA,
IOL = 16 mA,
VCC = 5.5 V,
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Not more than one output should be shorted at a time.
switching characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER
tPLH
tPHL
tPLH
tPHL
tTLH
tTHL
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output
Ratio of propagation delay times
Transition time, low-to-high-level output
Transition time, high-to-low-level output
RL = 400
Ω,
CL = 50 pF,
Ω
See Figure 1
TEST CONDITIONS
MIN
7
10
0.5
1
1
TYP
14
18
0.8
7
3
MAX
25
30
1.3
12
12
ns
ns
UNIT
ns
ns
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
2−3
SN75125, SN75127
SEVEN CHANNEL LINE RECEIVERS
SLLS108B − D239, JANUARY 1977 − REVISED FEBRUARY 1993
PARAMETER MEASUREMENT INFORMATION
VCC
RL = 400
Ω
(see Note C)
Output
Pulse
Generator
(see Note A)
CL = 50 pF
(see Note B)
TEST CIRCUIT
100 ns
10 ns
Input
10%
90%
0.7 V
10 ns
90%
1.7 V
10%
3V
0V
tPHL
2V
Output
1.5 V
0.8 V
tTHL
VOLTAGE WAVEFORMS
tPLH
2V
1.2 V
0.8 V
tTLH
VOH
VOL
NOTES: A. The pulse generator has the following characteristics: ZO
≈
50
Ω,
PRR
≤
5 MHz.
B. CL includes probe and jig capacitance.
C. All diodes are 1N3064 or equivalent.
Figure 1. Tests Circuit and Voltage Waveforms
2−4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
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