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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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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VOHHigh-level output voltage
V
R
kΩ
V
VOLLow-level output voltage (see Note 2)
V
R
kΩ
V
O
,
100
IOZHigh-impedance-state output current
SM at 0.6 V
A
O
,
100
,
I
Supply current from V
A
,
,
I
Supply current from V
A
L
,
L
,
L
,
L
,
L
,
L
,
L
,
L
,
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
electrical characteristics over recommended operating free-air temperature range, V
at 2 V (unless otherwise noted)
SM
PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT
V
= ±5 V 4
CC–
CC+
CC±
V
= ±12 V 10
CC±
V
= ±5 V –4
CC±
V
= ±12 V –10
CC±
V
= 12 V,
V
= ±12 V
CC±
V
= –12 V,
V
= ±12 V
CC±
–4.5 –10 –19.5 mA
4.5 10 19.5 mA
V
= ±5 V 90 160
CC±
V
= ±12 V 95 160
CC±
V
= ±5 V 40
CC±
V
= ±12 V 40
CC±
V
= ±5 V –90 –160
CC±
V
= ±12 V –95 –160
CC±
V
= ±5 V –40
CC±
V
= ±12 V –40
CC±
p
p
I
IH
I
IL
I
OS(H)
I
OS(L)
r
o
CC+
CC–
†
All typical values are at TA = 25°C.
‡
Not more than one output should be shorted at a time.
NOTE 2: The algebraic convention, where the more positive (less negative) limit is designated as maximum, is used in this data sheet for logic
High-level input current VI = 5 V 10 µA
Low-level input current VI = 0 V –10 µA
p
High-level short-circuit output current‡VI = 0.8 V, VO = 0 or V
Low-level short-circuit output current
Output resistance V
pp
pp
levels only, e.g., if –10 V is a maximum, the typical value is a more negative voltage.
p
‡
CC+
CC–
= 0.8 V,
IH
= 2 V,
IH
VI = 2 V, VO = 0 or V
= 0, VO = –2 V to 2 V 300 Ω
CC±
A and B inputs at 0.8 V or 2 V,
No load
A and B inputs at 0.8 V or 2 V,
RL = 3 kΩ,SM at 0.6 V
A and B inputs at 0.8 V or 2 V,
No load
A and B inputs at 0.8 V or 2 V,
RL = 3 kΩ,SM at 0.6 V
L
L
= 3
= 3
CC
–
= ±12 V,
±
µ
µ
µ
switching characteristics over recommended operating free-air temperature range, V
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT
t
t
t
t
t
t
t
t
t
t
SR Output slew rate
†
§
¶
#
Propagation delay time, low- to high-level output
PLH
Propagation delay time, high- to low-level output
PHL
Transition time, low- to high-level output
TLH
Transition time, high- to low-level output
THL
Transition time, low- to high-level output
TLH
Transition time, high- to low-level output
THL
Output enable time to high level
PZH
Output disable time from high level
PHZ
Output enable time to low level
PZL
Output disable time from low level
PLZ
All typical values are at TA = 25°C.
t
and t
PHL
Measured between 10% and 90% points of output waveform
Measured between 3-V and –3-V points of output waveform
include the additional time due to on-chip slew rate and are measured at the 50% points.
PLH
#
§
§
¶
¶
#
#
R
= 3 kΩ to 7 kΩ, C
See Figure 1
R
= 3 kΩ to 7 kΩ, C
See Figure 2
R
= 3 kΩ to 7 kΩ, C
See Figure 3
R
= 3 kΩ to 7 kΩ, C
See Figure 4
RL = 3 kΩ to 7 kΩ, CL = 15 pF 6 15 30 V/µs
= 15 pF,
= 2500 pF,
= 15 pF,
= 15 pF,
0.53 1 3.2 µs
0.53 1 3.2 µs
1.5 µs
1.5 µs
±
CC
3 µs
3.5 µs
50 µs
10 µs
15 µs
10 µs
= ±12 V
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
PARAMETER MEASUREMENT INFORMATION
Input
Input
Pulse
Generator
(see Note A)
R
L
TEST CIRCUIT VOLTAGE WAVEFORMS
NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf ≤50 ns.
B. CL includes probe and jig capacitance.
Output
C
L
(see Note B)
Output
t
PHL
t
THL
90%
50%
10%
Figure 1. Test Circuit and Voltage Waveforms, Propagation and Transition Times
Input
Input
Pulse
Generator
(see Note A)
R
L
TEST CIRCUIT
NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf ≤50 ns.
B. CL includes probe and jig capacitance.
Output
C
L
(see Note B)
Output
3 V
t
THL
VOLTAGE WAVEFORMS
–3 V–3 V
Figure 2. Test Circuit and Voltage Waveforms, Transition Times
t
PLH
t
TLH
3 V
t
TLH
3 V
0 V
V
V
3 V
0 V
V
V
OH
OL
OH
OL
Input
Pulse
Generator
(see Note A)
0 V
R
L
TEST CIRCUIT
NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf ≤50 ns.
B. CL includes probe and jig capacitance.
Output
C
L
(see Note B)
Input
Output
1.5 V 1.5 V
t
PZH
V
OH/2
t
PHZ
VOLTAGE WAVEFORMS
Figure 3. Driver Test Circuit and Voltage Waveforms
0.5 V
3 V
0 V
V
V
OH
off
≈ 0 V
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Pulse
Generator
(see Note A)
3 V
Input
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
PARAMETER MEASUREMENT INFORMATION
Input
Output
t
PZL
C
R
L
L
(see Note B)
Output
1.5 V 1.5 V
V
OL/2
t
PLZ
SN75C198
3 V
0 V
V
≈ 0 V
off
0.5 V
V
OL
TEST CIRCUIT
NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf ≤50 ns.
B. CL includes probe and jig capacitance.
VOLTAGE WAVEFORMS
Figure 4. Driver Test Circuit and Voltage Waveforms
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
7
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
TYPICAL CHARACTERISTICS
VOLTAGE TRANSFER CHARACTERISTICS
V
= ±15 V
CC±
V
= ±12 V
CC±
V
= ±9 V
V
CC±
CC±
= ±5 V
9
6
3
0
20
16
12
8
4
0
V
= ±12 V
CC±
TA = 25°C
OUTPUT CURRENT
vs
OUTPUT VOLTAGE
VOL (VI = 2 V)
3-kΩ Load Line
–3
O
–6
V
VO – Output Voltage – V
–9
–12
–15
0
15
10
5
0
V
CC±
V
CC±
V
RL = 3 kΩ
TA = 25°C
VI – Input Voltage – V
V
CC±
CC±
Figure 5 Figure 6
SHORT-CIRCUIT OUTPUT CURRENT
vs
FREE-AIR TEMPERATURE
V
CC±
I
OS(L)
VI = 2 V
VO = 0 or V
CC+
= ±5 V
= ±9 V
= ±12 V
= ±15 V
= ±12 V
–4
–8
O
I
IO – Output Current – mA
–12
–16
20.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
–20
–16
–12 –8 –4 0 4 8 12
VOH (VI = 0.8 V)
16
VO – Output Voltage – V
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
12
8
4
0
VOH (V
VOH (V
= ± 12 V, VI = 0.8 V)
CC±
= ± 5 V, VI = 0.8 V)
CC±
RL = 3 kΩ
–5
I
OS(H)
VI = 0.8 V
–10
OS
I
IOS – Short-Circuit Output Current – mA
–15
VO = 0 or V
TA – Free-Air Temperature – ° C
CC–
Figure 7 Figure 8
8
VOL (V
–4
O
V
VO – Output Voltage – V
–8
VOL (V
100806040200 120
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
–12
0 20 40 60 80 100
= ± 5 V, VI = 2 V)
CC±
= ± 12 V, VI = 2 V)
CC±
TA – Free-Air Temperature – ° C
120
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
TYPICAL CHARACTERISTICS
FREE-AIR TEMPERATURE
120
V
= ±12 V
CC±
100
80
IIH (VI = 5 V)
60
40
20
I
II – Input Current – nA
I
0
IIL (VI = 0)
–20
–40
TA – Free-Air Temperature – ° C
FREE-AIR TEMPERATURE
120
80
Aµ
40
I
CC+
V
CC±
= ±12 V
INPUT CURRENT
vs
0 20 40 60 80 100
Figure 9
SUPPLY CURRENT
vs
RL = No Load
VI = 0.8 V or 2 V
V
= ±5 V
CC±
120
POWER-OFF OUTPUT RESISTANCE
FREE-AIR TEMPERATURE
500
V
= 0
Ωr
475
450
425
400
375
350
– Power-Off Output Resistance –
o
325
300
CC±
VO = – 2 V
VO = 2 V
TA – Free-Air Temperature – ° C
Figure 10
OUTPUT SLEW RATE
FREE-AIR TEMPERATURE
30
Slew Rate
25
µsV/
Positive Transition
20
RL = 3 kΩ
vs
100806040200 120
vs
RL =73 kΩ
0
– Supply Current –
–40
CC ±
I
–80
–120
I
CC–
15
Slew Rate
Negative
Transition
5
0
V
= ±5 V
CC±
V
= ±12 V
CC±
TA – Free-Air Temperature – ° C
10
SR – Output Slew Rate – V/s
100806040200 120
Figure 11 Figure 12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
RL = 3 kΩ
RL = 7 kΩ
100806040200 120
TA – Free-Air Temperature – ° C
9
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
TYPICAL CHARACTERISTICS
PROPAGATION DELAY TIME
vs
FREE-AIR TEMPERATURE
2
t
1.75
sµ
1.5
1.25
1
0.75
0.5
pd
t
tpd – Propagation Delay Time – s
0.25
0
0 20406080100
PHL
t
PLH
TA – Free-Air Temperature – ° C
RL = 3 kΩ
RL = 3 kΩ
RL = 7 kΩ
RL = 7 kΩ
Figure 13
OUTPUT ENABLE TIME TO HIGH LEVEL
vs
FREE-AIR TEMPERATURE
30
sµ
VCC± = ±12 V
RL = 3 kΩ
CL = 15 pF
25
V
= ±12 V
CC±
CL = 15 pF
120
OUTPUT TRANSITION TIME
vs
FREE-AIR TEMPERATURE
2
VCC± = ±12 V
1.75
sµ
1.25
0.75
– Output Transition Time –
t
t
0.25
RL = 3 kΩ to 7 kΩ
1.5
1
0.5
0
t
TLH
t
THL
CL = 2500 pF
t
TLH
t
TA – Free-Air Temperature – ° C
THL
CL = 15 pF
100806040200 120
Figure 14
OUTPUT DISABLE TIME FROM HIGH LEVEL
vs
FREE-AIR TEMPERATURE
0.8
sµ
0.7
VCC± = ±12 V
RL = 3 kΩ
CL = 15 pF
20
15
10
5
PZH
tPZH – Output Enable Time to High Level – us
t
0
0
10
20 40 60 80 100
TA – Free-Air Temperature – ° C
Figure 15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
120
0.6
0.5
0.4
0.3
PHZ
tPHZ – Output Disable Time From High Level –
t
0.2
TA – Free-Air Temperature – ° C
Figure 16
100806040200
120
SN75C198
QUADRUPLE LOW-POWER LINE DRIVERS
SLLS051C – JULY 1990 – REVISED MARCH 1997
TYPICAL CHARACTERISTICS
OUTPUT ENABLE TIME TO LOW LEVEL
FREE-AIR TEMPERATURE
8
sµ
PZL
tPZL – Output Enable Time to Low Level – us
t
7
6
5
4
3
2
1
0
VCC± = ±12 V
RL = 3 kΩ
CL = 15 pF
TA – Free-Air Temperature – ° C
vs
vs
FREE-AIR TEMPERATURE
OUTPUT DISABLE TIME FROM LOW LEVEL
3
sµ
VCC± = ±12 V
2.5
1.5
0.5
PLZ
tPZL – Output Disable Time From Low Level – us
t
100806040200
120
RL = 3 kΩ
CL = 15 pF
2
1
0
TA – Free-Air Temperature – ° C
Figure 17 Figure 18
100806040200 120
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
11
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pertaining to warranty, patent infringement, and limitation of liability.
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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