TI SN75123

SN75123
DUAL LINE DRIVER
SLLS086C – SEPTEMBER 1973 – REVISED APRIL 1998
D
D
D
D
D
D
D
D
D
D OR N PACKAGE
(TOP VIEW)
Meets or Exceeds the Requirements of
IBM System 360 Input/Output Interface
Specification
Operate From Single 5-V Supply
TTL Compatible
3.11-V Output at IOH = –59.3 mA
Uncommitted Emitter-Follower Output
Structure for Party-Line Operation
Short-Circuit Protection
AND-OR Logic Configuration
Designed for Use With Triple Line Receiver
SN75124
Designed to Be Interchangeable With
N8T13 and N8T23
1A
1B
1C
1D
1E
1F
1Y
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
2F
2E
2D
2C
2B
2A
2Y
THE SN751730 IS RECOMMENDED
FOR NEW IBM 360/370 INTERFACE DESIGNS.
description
The SN75123 is a dual line driver specifically designed to meet the input/output interface specifications for IBM
System 360. It also is compatible with standard-TTL logic and supply-voltage levels.
The SN75123 low-impedance emitter-follower outputs drive terminated lines such as coaxial cable or twisted
pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output
short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops
below approximately 1.5 V. All the inputs are in conventional TTL configuration, and the gating can be used
during power-up and power-down sequences to ensure that no noise is introduced to the line.
The SN75123 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
A
B
C
D
H
H
H
H
X
X
X
X
F
OUTPUT
Y
X
X
H
H
H
H
E
All other input combinations
L
H = high level, L = low level, X = irrelevant
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.
IBM is a trademark of International Business Machines Corp.
Copyright  1998, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN75123
DUAL LINE DRIVER
SLLS086C – SEPTEMBER 1973 – REVISED APRIL 1998
logic symbol†
1A
1B
1C
1D
1E
1F
2A
2B
2C
2D
2E
2F
1
&
≥1
2
3
7
4
5
&
6
10
11
12
9
13
14
15
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
A
B
C
D
Y
E
F
2
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SN75123
DUAL LINE DRIVER
SLLS086C – SEPTEMBER 1973 – REVISED APRIL 1998
schematic (each driver)
VCC
16
To Other
Line Driver
A
B
C
D
E
F
GND
4 kΩ
4 kΩ
360 Ω
15 Ω
1, 10
2, 11
3, 12
4, 13
7, 9
5, 14
Y
6, 15
8
To Other
Line Driver
Resistor values shown are nominal.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Output voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Continuous total dissipation at (or below) 25°C free-air temperature (see Note 2): D package . . . . . 950 mW
N package . . . . 1150 mW
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, except differential input voltage, are with respect to network ground terminal.
2. For operation above 25°C free-air temperature, derate the D package to 608 mW at 70°C at the rate of 7.6 mW/°C and the N package
to 736 mW at 70°C at the rate of 9.2 mW/°C.
recommended operating conditions
Supply voltage, VCC
High-level input voltage, VIH
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
2
Low-level input voltage, VIL
V
0.8
High-level output current, IOH
Operating free-air temperature, TA
0
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V
–100
mA
70
°C
3
SN75123
DUAL LINE DRIVER
SLLS086C – SEPTEMBER 1973 – REVISED APRIL 1998
electrical characteristics, VCC = 4.75 V to 5.25 V, TA = 0°C to 70°C (unless otherwise noted)
PARAMETER
VIK
VI(BR)
TEST CONDITIONS
Input clamp voltage
Input breakdown voltage
VCC = 5 V,
VCC = 5 V,
II = –12 mA
II = 10 mA
MIN
VOH
High level output voltage
High-level
VCC = 5 V,, VIH = 2 V,,
IOH = –59.3 mA, See Note 3
VOL
Low-level output voltage
VIL = 0.8 V,
IOL = –240 µA,
IOH
High level output current
High-level
V VIH = 4.5
45V
V TA = 25°C,
25°C See Note 3
VCC = 5 V,
V, VOH = 2 V,
IO(off)
IIH
Off-state output current
VCC = 0,
VI = 4.5 V
IIL
IOS
Low-level input current
ICCH
ICCL
Supply current, outputs high
V
3.11
V
2.9
See Note 3
100
–100
–0.1
VCC = 5.25 V,
VCC = 5.25 V,
Supply current, outputs low
V
0.15
V
250
–250
mA
40
µA
VO = 3 V
VI = 0.4 V
VCC = 5 V,
Short-circuit output current†
UNIT
–1.5
5.5
TA = 25°C
TA = 0°C to 70°C
High-level input current
MAX
40
µA
–1.6
mA
–30
mA
mA
TA = 25°C
All inputs at 2 V,
Outputs open
28
All inputs at 0.8 V,
Outputs open
60
mA
† Not more than one output should be shorted at a time.
NOTE 3: The output voltage and current limits are valid for any appropriate combination of high and low inputs specified by the function table
for the desired output.
switching characteristics, VCC = 5 V, TA = 25°C
TYP
MAX
tPLH
tPHL
Propagation delay time, low- to high-level output
PARAMETER
RL = 50 Ω,
TEST CONDITIONS
CL = 15 pF,
See Figure 1
MIN
12
20
UNIT
ns
Propagation delay time, high- to low-level output
RL = 50 Ω,
CL = 15 pF,
See Figure 1
12
20
ns
tPLH
tPHL
Propagation delay time, low- to high-level output
RL = 50 Ω,
CL = 100 pF,
See Figure 1
20
35
ns
Propagation delay time, high- to low-level output
RL = 50 Ω,
CL = 100 pF,
See Figure 1
15
25
ns
PARAMETER MEASUREMENT INFORMATION
3V
VCC
≤ 5 ns
Input
Pulse
Generator
(see Note A)
90%
1.5 V
≤ 5 ns
3V
90%
1.5 V
10%
10%
0V
Output
RL = 50 Ω
CL
(see Note B)
tPLH
tPHL
VOH
1.5 V
Output
1.5 V
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: ZO = 50 Ω, tw = 200 ns, duty cycle = 50%.
B. CL Includes probe and jig capacitance.
Figure 1. Test Circuit and Voltage Waveforms
4
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• DALLAS, TEXAS 75265
SN75123
DUAL LINE DRIVER
SLLS086C – SEPTEMBER 1973 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
OUTPUT CURRENT
vs
OUTPUT VOLTAGE
ÏÏÏÏÏÏ
ÏÏÏÏÏÏ
ÏÏÏÏÏÏ
–300
VCC = 5 V
All inputs at 2 V
TA = 25°C
I O – Output Current – mA
–250
–200
–150
–100
–50
0
0
1
2
3
4
5
VO – Output Voltage – V
Figure 2
APPLICATION INFORMATION
A
B
C
95-Ω Coaxial Cable
D
E
F
1/2 SN75123
95 Ω
95 Ω
Strobe
Y
A
B
1/3 SN75124
Figure 3. Unbalanced Line Communication Using SN75123 and SN75124
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• DALLAS, TEXAS 75265
5
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Copyright  1998, Texas Instruments Incorporated