SN75140
DUAL LINE RECEIVER
SLLS080C – JANUARY 1977 – REVISED APRIL 1998
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Single 5-V Supply
D
±100-mV Sensitivity
D
For Application as:
– Single-Ended Line Receiver
– Gated Oscillator
– Level Comparator
D
Adjustable Reference Voltage
D
TTL Outputs
D
TTL-Compatible Strobe
D
Designed for Party-Line (Data-Bus)
Applications
D
Common Reference-V oltage Pin
D
Common Strobe
description
This device consists of a dual single-ended line receiver with TTL-compatible strobes and outputs. The
reference voltage (switching threshold) is applied externally and can be adjusted from 1.5 V to 3.5 V, making
it possible to optimize noise immunity for a given system design. Due to the low input current (less than 100 µA),
the device is suited ideally for party-line (data-bus) systems.
The SN75140 has a common reference-voltage pin and a common strobe.
The SN75140 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each receiver)
LINE INPUT
STROBE OUTPUT
≤ V
ref
– 100 mV L H
≥ V
ref
+ 100 mV X L
X H L
H = high level, L = low level, X = irrelevant
logic symbol
‡
2
COMSTRB
‡
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
3
1LINE
1OUT
1
≥1
5
2LINE
2OUT
7
≥1
6
COMREF
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.
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
8
7
6
5
1OUT
COMSTRB
1LINE
GND
V
CC
2OUT
COMREF
2LINE
P OR PS† PACKAGE
(TOP VIEW)
†
The PS package is only available
left-ended taped and reeled (order
SN75140 PSR).
SN75140
DUAL LINE RECEIVER
SLLS080C – JANUARY 1977 – REVISED APRIL 1998
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
2
3
6
5
1
7
1OUT
2OUT
COMSTRB
1LINE
COMREF
2LINE
schematic (each receiver)
To Other
Line Receiver
V
CC
OUT
COMSTRB
To Other Line Receiver
To Other
Line Receiver
GND
COMREF
LINE
NOTE: Resistor values shown are nominal and in ohms.
1500 750 40001500 4000 130
1500
750
850
470
470
2900
500 1000
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference input voltage, V
ref
5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line input voltage range with respect to GND –2 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line input voltage with respect to V
ref
±5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strobe input voltage 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–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.
NOTE 1: Unless otherwise specified, voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
P 1000 mW 8.0 mW/°C 640 mW
PS 450 mW 3.6 mW/°C 288 mW
SN75140
DUAL LINE RECEIVER
SLLS080C – JANUARY 1977 – REVISED APRIL 1998
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
CC
4.5 5 5.5 V
Reference input voltage, V
ref
1.5 3.5 V
High-level line input voltage, V
IH(L)
V
ref
+0.1 VCC–1 V
Low-level line input voltage, V
IL(L)
0 V
ref
–0.1
V
High-level strobe input voltage, V
IH(S)
2 5.5 V
Low-level strobe input voltage, V
IL(S)
0 0.8 V
Operating free-air temperature range, T
A
0 70 °C
electrical characteristics over recommended operating free-air temperature range,
V
CC
= 5 V ±10%, V
ref
= 1.5 V to 3.5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT
V
IK
Strobe input clamp voltage I
I(S)
= –12 mA –1.5 V
VOHHigh-level output voltage
VOLLow-level output voltage
Strobe input
current at
Strobe
I(S)
maximum input
voltage
COMSTRB
LINE V
I(L)
= 3.5 V, V
ref
= 1.5 V 35 100
µA
LINE V
I(L)
= 0, V
ref
= 1.5 V –10
–20
I
OS
Short-circuit output current
‡
VCC = 5.5 V –18 –55 mA
I
CCH
Supply current, output high V
I(S)
= 0, V
I(L)
= V
ref
– 100 mV 18 30 mA
I
CCL
Supply current, output low V
I(S)
= 0, V
I(L)
= V
ref
+ 100 mV 20 35 mA
†
All typical values are at VCC = 5 V, TA = 25°C.
‡
Only one output should be shorted at a time.
switching characteristics, VCC = 5 V, V
ref
= 2.5 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
PLH(L)
Propagation delay time, low- to high-level output from LINE
CL = 15 pF, RL = 400 kΩ,
See Figure 1
22 35 ns
t
PHL(L)
Propagation delay time, high- to low-level output from LINE
CL = 15 pF, RL = 400 kΩ,
See Figure 1
22 30 ns
t
PLH(S)
Propagation delay time,
low- to high-level output from COMSTRB
CL = 15 pF, RL = 400 kΩ,
See Figure 1
12 22 ns
t
PHL(S)
Propagation delay time,
high- to low-level output from COMSTRB
CL = 15 pF, RL = 400 kΩ,
See Figure 1
8 15 ns