SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meets or Exceeds the Requirements of ITU
Recommendations V.10, V.11, X.26, and
X.27
D
Designed for Multipoint Bus Transmission
on Long Bus Lines in Noisy Environments
D
Designed to Operate Up to 20 Mbaud
D
3-State Outputs
D
Common-Mode Input Voltage Range
– 7 V to 7 V
D
Input Sensitivity...±300 mV
D
Input Hysteresis...120 mV Typ
D
High-Input Impedance...12 kΩ Min
D
Operates from Single 5-V Supply
D
Low Supply-Current Requirement
35 mA Max
D
Improved Speed and Power Consumption
Compared to AM26LS32A
description
The SN75ALSI97 is a monolithic, quadruple line receiver with 3-state outputs designed using advanced,
low-power, Schottky technology. This technology provides combined improvements in bar design, tooling
production, and wafer fabrication. This, in turn, provides significantly lower power requirements and permits
much higher data throughput than other designs. The device meets the specifications of ITU Recommendations
V .10, V.11, X.26, and X.27. It features 3-state outputs that permit direct connection to a bus-organized system
with a fail-safe design that ensures the outputs will always be high if the inputs are open.
The device is optimized for balanced, multipoint bus transmission at rates up to 20 megabits per second. The
input features high-input impedance, input hysteresis for increased noise immunity , and an input sensitivity of
±300 mV over a common-mode input voltage range of –7 V to 7 V . It also features active-high and active-low
enable functions that are common to the four channels. The SN75ALS197 is designed for optimum performance
when used with the SN75ALS192 quadruple differential line driver.
The SN75ALS197 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each receiver)
DIFFERENTIAL INPUTS
ENABLES
OUTPUT
A–B
G G
Y
VID ≥ 0.3 V
H
X
X
L
H
H
– 0.3 V < VID < 0.3 V
H
X
X
L
?
?
VID ≤ – 0.3 V
H
X
X
L
L
L
X L HZ
Open
H
X
X
L
H
H
H = high level, L = low level, X = irrelevant, ? = indeterminate,
Z = high impedance (off)
Copyright 1995, 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.
D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1B
1A
1Y
G
2Y
2A
2B
GND
V
CC
4B
4A
4Y
G
3Y
3A
3B
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
1A
2
1B
1
2A
6
2B
7
3A
10
3B
9
4A
14
4B
15
3
1Y
5
2Y
11
3Y
13
4Y
4
G
12
G
EN
≥ 1
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
logic diagram (positive logic)
4Y
3Y
2Y
1Y
13
11
5
3
4
4B
4A
3B
3A
2B
2A
1B
1A
15
14
9
10
7
6
1
2
12
G
G
schematics of inputs and outputs
EQUIVALENT OF EACH A OR B INPUT EQUIVALENT OF G OR G INPUTS EQUIVALENT OF ALL OUTPUTS
GND
V
CC
Input
V
CC
V
CC
Input
GND
3 kΩ
NOM
18 kΩ
NOM
300 kΩ
NOM
2 kΩ
NOM
VCC (A)
or
GND (B)
GND
22 kΩ
NOM
Output
50 kΩ
NOM
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
(A or B inputs) ±15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential input voltage, V
ID
(see Note 2) ±15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low-level output current, I
OL
50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
NOTES: 1. All voltage values, except differential input voltage, are with respect to network ground terminal.
2. Differential input voltage is measured at the noninverting input with respect to the corresponding inverting input.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING
FACTOR
TA = 70°C
POWER RATING
D 950 mW 7.6 mW/°C 608 mW
N 1150 mW 9.2 mW/°C 736 mW
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
CC
4.75 5 5.25 V
Common-mode input voltage, V
IC
±7 V
Differential input voltage, V
ID
±12 V
High-level input voltage, V
IH
2 V
Low-level input voltage, V
IL
0.8 V
High-level output current, I
OH
–400 µA
Low-level output current, I
OL
16 mA
Operating free-air temperature, T
A
0 70 °C
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended range of common-mode input voltage, supply
voltage, and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT
V
IT+
Positive-going input threshold voltage 300 mV
V
IT–
Negative-going input threshold voltage –300
‡
mV
V
hys
Hysteresis voltage (V
IT+
– V
IT–
) See Figure 4 120 mV
V
IK
Enable-input clamp voltage II = –18 mA –1.5 V
V
OH
High-level output voltage VID = 300 mV , IOH = – 400 µA 2.7 3.6 V
p
IOL = 8 mA
0.45
VOLLow-level output voltage
V
ID
= –
300 mV
IOL = 16 mA
0.5
V
p
p
VO = 2.4 V
20
IOZHigh-impedance-state output current
V
CC
= 5.25
V
VOH = 0.4 V
–20
µ
A
p
Other input at 0 V ,
VI = 15 V
0.7 1.2
IILine input current
,
See Note 3
VI = –15 V
–1.0 –1.7
mA
p
VIH = 2.7 V
20
IHHigh-level enable-input current
VIH = 5.25 V
100
µ
A
I
IL
Low-level enable-input current VIL = 0.4 V –100 µA
Input resistance 12 18 kΩ
I
OS
Short-circuit output current
§
VID = 3 V, VO = 0 –15 –78 –130 mA
I
CC
Supply current Outputs disabled 22 35 mA
†
All typical values are at VCC = 5 V, TA = 25°C.
‡
The algebraic convention, in which the less positive limit is designated minimum, is used in this data sheet for threshold voltage levels only.
§
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
NOTE 3: Refer to ANSI Standard EIA/TIA-422-B and EIA/TIA-423-B for exact conditions.
switching characteristics, VCC = 5 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
PLH
Propagation delay time, low- to high-level output
V
= – 2.5 V to 2.5 V, C
= 15 pF,
15 22 ns
t
PHL
Propagation delay time, high- to low-level output
ID
,
See Figure 2
L
,
15 22 ns
t
PZH
Output enable time to high level
p
13 25
t
PZL
Output enable time to low level
C
L
= 15 pF,
See Figure 3
11 25
ns
t
PHZ
Output disable time from high level
p
13 25
t
PLZ
Output disable time from low level
C
L
=
15 pF
,
See Figure 3
15 22
ns
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
I
OH
V
OH
I
OL
V
OL
V
ID
2 V
Figure 1. V
OH
and VOL Test Circuit
VOLTAGE WAVEFORMSTEST CIRCUIT
t
PHL
t
PLH
2.5 V
–2.5 V
V
OH
V
OL
1.3 V1.3 V
0 V
Output
Input
0 V
Output
50 Ω
2 V
Generator
(see Note A)
CL = 15 pF
(see Note B)
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, duty cycle ≤ 50%, ZO = 50 Ω,
tr ≤ 6 ns, tf ≤ 6 ns.
B. CL includes probe and jig capacitance.
Figure 2. t
PLH
and t
PHL
Test Circuit and Voltage Waveforms
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
LOAD CIRCUIT
VOLTAGE WAVEFORMS FOR t
PHZ
and t
PZH
VOLTAGE WAVEFORMS FOR t
PLZ
and t
PZL
C
L
(see Note A)
RL = 2 kΩ
S2
V
CC
≈ 1.4 V
t
PHZ
t
PZH
1.3 V
3 V
Enable
G
Output
S1
Test
Point
5 kΩ
See Note B
10%
90%
0 V
3 V
0 V
10%10%
Enable
G
1.3 V
90%
See Note C
1.3 V1.3 V
90% 90%
10%
S1 Open
S2 Closed
S1 Closed
S2 Closed
0.5 V
V
OH
≤ 5 ns
≈ 1.4 V
t
PLZ
t
PZL
1.3 V
3 V
Enable
G
Output
10%
90%
0 V
3 V
0 V
10%10%
Enable
G
1.3 V
90%
See Note C
1.3 V1.3 V
90% 90%
10%
S1 Closed
S2 Open
S1 Closed
S2 Closed
0.5 V
V
OL
1.3 V 1.3 V
From Output
Under Test
≤ 5 ns ≤ 5 ns ≤ 5 ns
NOTES: A. CL includes probe and jig capacitance.
B. All diodes are 1N3064 or equivalent.
C. Enable G is tested with G
high; G is tested with G low.
Figure 3. t
PHZ
, t
PZH
, t
PLZ
, and t
PZL
Load Circuit and Voltage Waveforms
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 4
OUTPUT VOLTAGE
vs
ENABLE VOLTAGE
Enable Voltage – V
3
2
0 0.5 1 1.5
4
5
2 2.5 3
1
0
– Output Voltage – VV
O
VID = 300 mV
VIC = 0
RL = 8 kΩ to GND
TA = 25°C
VCC = 5.5 V
VCC = 5 V
VCC = 4.5 V
4.5
3.5
2.5
1.5
0.5
Figure 5
OUTPUT VOLTAGE
vs
ENABLE VOLTAGE
Enable Voltage – V
– Output Voltage – VV
O
2
0
0 0.5 1 1.5 2
3
4
2.5 3
1
TA = 70°C
TA = 25°C
TA = 0°C
VCC = 5 V
VID = 300 mV
VIC = 0
RL = 8 kΩ to GND
3.5
2.5
1.5
0.5
Figure 6
OUTPUT VOLTAGE
vs
ENABLE VOLTAGE
Enable Voltage – V
– Output Voltage – VV
O
3
2
1
0
0 0.5 1
4
5
6
1.5 2 2.5
3
VCC = 5.5 V
VCC = 5 V
VCC = 4.5 V
VID = – 300 mV
VIC = 0
RL = 1 kΩ to V
CC
TA = 25°C
Figure 7
OUTPUT VOLTAGE
vs
ENABLE VOLTAGE
Enable Voltage – V
– Output Voltage – VV
O
3
2
1
0
0 0.5 1
4
5
6
1.5 2 2.5
3
VCC = 5 V
VID = – 300 mV
VIC = 0
RL = 1 kΩ to V
CC
TA = 0°C
TA = 25°C
TA = 70°C
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 8
OUTPUT VOLTAGE
vs
DIFFERENTIAL INPUT VOLTAGE
VID – Differential Input Voltage – mV
– Output Voltage – VV
O
0
– 200 – 100 0
3
4
5
100 200
1
2
VIT
+
VCC = 5 V
VIC = –12 V to 12 V
IO = 0
TA = 25°C
4.5
3.5
2.5
1.5
0.5
– 150 – 50 50 150
VIT
–
Figure 9
HIGH-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
– High-Level Output Voltage – VV
OH
2
1
0
01020304050
3
4
60 70 80
VCC = 5 V
VID = 300 mV
VIC = 0
IOH = – 400 µA
IOH = 0
3.5
2.5
1.5
0.5
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
IOH – High-Level Output Current – mA
– High-Level Output Voltage – VV
OH
3
2
4
5
1
0
– 100
VID = 300 mV
VIC = 0
TA = 25°C
VCC = 5.5 V
VCC = 5 V
VCC = 4.5 V
0 – 20 – 40 – 60 – 80
4.5
3.5
2.5
1.5
0.5
–10 –30 –50 –70 –90
Figure 10 Figure 11
3.5
– High-Level Output Voltage – VV
OH
HIGH-LEVEL OUTPUT VOLTAGE
vs
HIGH-LEVEL OUTPUT CURRENT
IOH – High-Level Output Current – mA
3
2
4
5
1
0
0 – 20 –40 –60 – 80 – 100
VCC = 5 V
VID = 300 mV
VIC = 0
TA = 0°C
TA = 25°C
TA = 70°C
–10 –30 –50 –70 –90
4.5
2.5
1.5
0.5
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
– Low-Level Output Volatge – VV
OL
LOW-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
0.2
0.1
0
01020304050
0.3
0.4
60 70 80
VCC = 5 V
VID = – 300 mV
VIC = 0
IO = 8 mA
IO = 0
0.35
0.25
0.15
0.05
Figure 12
Figure 13
– Low-Level Output Voltage – VV
OL
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
IOL – Low-Level Output Current – mA
0.4
0.2
0
01020304050
0.6
0.8
60 70 80
VCC = 4.5 V
0.7
0.5
0.3
0.1
VID = – 300 mV
VIC = 0
TA = 25°C
VCC = 5.5 V
VCC = 5 V
Figure 14
– Low-Level Output Voltage – VV
OL
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
IOL – Low-Level Output Current – mA
0.4
0.2
0
01020304050
0.6
0.8
60 70 80
TA = 70°C
0.7
0.5
0.3
0.1
VCC = 5 V
VID = – 300 mV
VIC = 0
TA = 25°C
TA = 0°C
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 15
SUPPLY CURRENT
vs
SUPPLY VOLTAGE
VCC – Supply Voltage – V
– Supply Current – mAI
CC
0
024
30
40
50
68
10
20
Enabled
VID = – 300 mV
VIC = 0
IO= 0
TA = 25°C
Disabled
5
15
25
35
45
1357
Figure 16
SUPPLY CURRENT
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
15
10
5
0
01020304050
20
25
30
60 70 80
VID = – 300 mV
Outputs Enabled
IO = 0
VCC = 5.5 V
VCC = 5 V
VCC = 4.5 V
– Supply Current – mAI
CC
Figure 17
SUPPLY CURRENT
vs
DIFFERENTIAL INPUT VOLTAGE
VID – Differential Input Voltage – mV
– Supply Current – mAI
CC
15
10
5
0
– 200 – 100 0
20
25
30
100 200
VCC = 5.5 V
VCC = 5 V
VCC = 4.5 V
IO = 0
Outputs Enabled
VIC = 0
TA = 25°C
30
5
20
0
40
25
10 k 100 k 1 M 10 M 100 M
35
10
15
VCC = 5 V
VI = ± 1.5-V Square Wave
CL = 15 pF
Four Channels Driven
TA = 25°C
SUPPLY CURRENT
vs
FREQUENCY
f – Frequency – Hz
– Supply Current – mAI
CC
Figure 18
SN75ALS197
QUADRUPLE DIFFERENTIAL LINE RECEIVER
SLLS045B – JANUARY 1989 – REVISED MA Y 1995
11
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 19
– Input Resistance – kr
I
INPUT RESISTANCE
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
30
20
25
15
5
10
10 807060504030200
0
Ω
Figure 20
INPUT CURRENT
vs
INPUT VOLTAGE TO GND
–15 15 201050–5–10–20
TA = 25°C
1
3
2
0
–1
–2
–3
VI – Input Voltage to GND – V
– Input Current – mAI
I
Figure 21
Switching Time – ns
SWITCHING TIME
vs
FREE-AIR TEMPERATURE
TA – Free-Air Temperature – °C
10
30
20
25
15
5
80706050403020
10
0
0
t
PHZ
t
PHL
t
PZH
t
PHZ
t
PLZ
t
PLH
t
PZH
CL = 15 pF
VCC = 5 V
t
PZL
Figure 22
PROPAGATION DELAY TIME
vs
SUPPLY VOLTAGE
VCC – Supply Voltage – V
2
5.55.45.35.25.154.94.84.7
18
4
6
8
10
12
14
16
4.6
20
4.5
0
TA = 25°C
CL = 15 pF
t
PHL
t
PLH
tpd – Propagation Delay Time – ns
IMPORTANT NOTICE
T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
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pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
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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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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Copyright 1998, Texas Instruments Incorporated
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