TEXAS INSTRUMENTS SN75C198 Technical data
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
D
Meets ANSI EIA/TIA-232-E and ITU
Recommendation V.28
D
Very Low Supply Current
D
Sleep Mode:
3-State Outputs in High-Impedance State
Ultra-Low Supply Current...17 µA Typ
D
Improved Functional Replacement for:
SN75188,
Motorola MC1488,
National Semiconductor DS14C88, and
D OR N PACKAGE
(TOP VIEW)
V
GND
CC–
1A
1Y
2A
2B
2Y
1
2
3
4
5
6
7
14
13
12
11
10
V
CC+
SM
4A
4Y
3B
3A
9
8
3Y
DS1488
D
CMOS- and TTL-Compatible Data Inputs
D
On-Chip Slew-Rate Limit...30 V/µs
D
Output Current Limit...10 mA Typ
D
Wide Supply Voltage Range...±4.5 V
to ±15 V
NOT RECOMMENDED FOR NEW DESIGNS
description
The SN75C198 is a monolithic low-power BI-MOS device containing four low-power line drivers designed to
interface data terminal equipment (DTE) with data circuit-terminating equipment (DCE) in conformance with the
specifications of ANSI EIA /TIA-232-E. The drivers of the SN75C198 are similar to those of the SN75C188
quadruple driver. The drivers have a controlled-output slew rate that is limited to a maximum of 30 V/µ s. This
feature eliminates the need for external components.
The sleep-mode input, SM
, can switch the outputs to high impedance, which avoids the transmission of
corrupted data during power-up and allows significant system power savings during data-off periods.
The SN75C198 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
SM A B
H H H L
H LX H
HXL H
LXX Z
H = high level, L = low level,
X = irrelevant, Z= high impedance
OUTPUT
Y
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.
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.
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Copyright 1997, Texas Instruments Incorporated
1
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
13
2
4
5
9
10
12
†
EN
3
&
&
6
8
11
logic symbol
SM
1A
2A
2B
3A
3B
4A
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
1Y
2Y
3Y
4Y
logic diagram (positive logic)
13
SM
2
1A
4
2A
5
2B
9
3A
10
3B
12
4A
3
1Y
6
2Y
8
3Y
11
4Y
2
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schematics of inputs and outputs
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
V
CC+
Input A
Input B
(Drivers 2
and 3 Only)
V
CC –
EQUIVALENT OF A AND B INPUTS
(Drivers 1
and 4)
V
CC +
Internal
1.4-V
Reference
to GND
TYPICAL OF Y OUTPUTS
Input
VCC±
EQUIVALENT OF SLEEP-MODE INPUT
SM
V
CC+
Internal
1.4-V
Reference
to GND
All resistor values shown are nominal.
160 Ω
74 Ω
72 Ω
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Output
V
CC–
3
SN75C198
PACKAGE
A
Low-level input voltage, V
V
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Supply voltage, V
Input voltage range, V
Output voltage range, V
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
Storage temperature range, T
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: All voltages are with respect to the network ground terminal.
(see Note 1) 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC+
–15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC–
–15 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
V
O
: SN75C198 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
D 950 mW 7.6 mW/°C 608 mW
N 1150 mW 9.2 mW/°C 730 mW
A
DISSIPATION RATING TABLE
T
≤ 25°C DERATING FACTOR T
POWER RATING ABOVE TA = 25°CAPOWER RATING
= 70°C
CC–
–6 V to V
CC+
+ 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
Supply voltage, V
Input voltage, VI (see Figure 2) V
High-level input voltage, V
Operating free-air temperature, T
CC+
CC–
IH
p
A and B inputs 0.8
IL
SM input 0.6
A
4.5 12 15 V
–4.5 –12 –15 V
+2 V
CC–
2 V
0 70 °C
CC+
V
†
4
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