Texas Instruments SN55ALS195J, SN75ALS195J, SN75ALS195N, SNJ55ALS195W, SNJ55ALS195FK Datasheet
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SN55ALS195, SN75ALS195
QUADRUPLE DIFFERENTIAL LINE RECEIVERS
SLLS010D – JUNE 1986 – REVISED MA Y 1995
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meet or Exceed the Requirements of ANSI
Standards EIA/TIA-422-B and EIA/TIA-423-A
D
Meet ITU Recommendations V.10 and V.11
D
Designed to Operate Up to 20 Mbaud
D
–7 V to 7 V Common-Mode Input Voltage
Range With 200-mV Sensitivity
D
3-State TTL-Compatible Outputs
D
High Input Impedance...12 kΩ Min
D
Input Hysteresis...120 mV Typ
D
Single 5-V Supply Operation
D
Low Supply Current Requirement
35 mA Max
D
Improved Speed and Power Consumption
Compared to MC3486
description
The SN55ALS195 and SN75ALS195 are four
differential line receivers with 3-state outputs
designed using advanced low-power Schottky
technology. This technology provides combined
improvements in die design, tooling production,
and wafer fabrication, which in turn, provide lower
power consumption and permit much higher data
throughput than other designs. The devices meet
the specifications of ANSI Standards EIA/
TIA-422-B and EIA/TIA-423-A and ITU Recommendations V.10 and V.11. The 3-state outputs
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 devices are 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
±200 mV over a common-mode input voltage range of ±7 V. The devices also feature an active-high enable
function for each of two receiver pairs. The SN55ALS195 and SN75ALS195 are designed for optimum
performance when used with the SN55ALS194 and SN75ALS194 quadruple differential line drivers.
The SN55ALS195 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN75ALS195 is characterized for operation from 0°C to 70°C.
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.
SN55ALS195 ...J OR W PACKAGE
SN75ALS195 ...J OR N PACKAGE
†
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1B
1A
1Y
1,2EN
2Y
2A
2B
GND
V
CC
4B
4A
4Y
3,4EN
3Y
3A
3B
3 2 1 20 19
910111213
4
5
6
7
8
18
17
16
15
14
4A
4Y
NC
3, 4EN
3Y
1Y
1, 2EN
NC
2Y
2A
SN55ALS195 ...FK PACKAGE
(TOP VIEW)
1A1BNC3A4B
2B
GND
NC
NC – No internal connection
CC
V
3B
†
For surface-mount package, see the SN75ALS199.
SN55ALS195, SN75ALS195
QUADRUPLE DIFFERENTIAL LINE RECEIVERS
SLLS010D – JUNE 1986 – REVISED MA Y 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
(each receiver)
DIFFERENTIAL INPUTS
A–B
ENABLE
EN
OUTPUT
Y
VID ≥ 0.2 V H H
– 0.2 V < VID < 0.2 V H ?
VID ≤ – 0.2 V H L
X L Z
Open H H
H = high level, L = low level, X = irrelevant, ? = indeterminate,
Z = high impedance (off)
logic symbol
†
1A
2
1B
1
2A
6
2B
7
3
1Y
5
2Y
4
1,2EN
EN
1A
2
1B
1
2A
6
2B
7
3
5
4
EN
3A
10
3B
9
4A
14
4B
15
11
3Y
13
4Y
12
3,4EN
EN
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for the J, N, and W packages.
logic diagram
12
3,4EN
2A
6
11
3Y
1Y
3
2
1A
1,2EN
4
5
2Y
13
4Y
1B
2B
4A
3A
3B
4B
1
7
10
9
14
15
SN55ALS195, SN75ALS195
QUADRUPLE DIFFERENTIAL LINE RECEIVERS
SLLS010D – JUNE 1986 – REVISED MA Y 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs
V
CC
EQUIVALENT OF EACH A OR B INPUT EQUIVALENT OF EN INPUTS EQUIVALENT OF ALL OUTPUTS
GND
V
CC
Input
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
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
(see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, A or B inputs, V
I
±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
: SN55ALS195 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN75ALS195 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case temperature for 60 seconds, T
C
: FK package 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J, N, or W package 300°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 conditons 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
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 125°C
POWER RATING
FK 1375 mW 11.0 mW/°C 880 mW 275 mW
J (SN55ALS195) 1375 mW 11.0 mW/°C 880 mW 275 mW
J (SN75ALS195) 1025 mW 8.2 mW/°C 656 mW N/A
N 1150 mW 9.2 mW°C 736 mW N/A
W 1000 mW 8.0 mW/°C 640 mW 200 mW
SN55ALS195, SN75ALS195
QUADRUPLE DIFFERENTIAL LINE RECEIVERS
SLLS010D – JUNE 1986 – REVISED MA Y 1995
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
SN55ALS195 SN75ALS195
MIN NOM MAX MIN NOM MAX
UNIT
Supply voltage, V
CC
4.5 5 5.5 4.75 5 5.25 V
Common-mode input voltage, V
IC
±7 ±7 V
Differential input voltage, V
ID
±12 ±12 V
High-level input voltage, V
IH
2 2 V
Low-level input voltage, V
IL
0.8 0.8 V
High-level output current, I
OH
–400 –400 µA
Low-level output current, I
OL
16 16 mA
Operating free-air temperature, T
A
–55 125 0 70 °C
electrical characteristics over recommended ranges 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
200 mV
V
IT–
Negative-going input threshold
voltage
–200
§
mV
V
hys
Hysteresis voltage (V
IT+
– V
IT–
) 120 mV
V
IK
Enable-input clamp voltage VCC = MIN, II = – 18 mA –1.5 V
V
OH
High-level output voltage
VCC = MIN,
See Figure 1
VID = 200 mV , IOH = – 400 µA,
2.5 3.6 V
p
VCC = MIN,
IOL = 8 mA 0.45
VOLLow-level output voltage
V
ID
= –
200 mV
,
See Figure 1
IOL = 16 mA 0.5
V
High-impedance-state
VCC = MAX,
VO = 2.7 V
VIL = 0.8 V, VID = – 3 V,
20
I
OZ
g
output current
VCC = MAX,
VO = 0.5 V
VIL = 0.8 V, VID = 3 V,
–20
µ
A
p
Other input at 0 V ,
VCC = MIN, VI = 15 V 0.7 1.2
IILine input current
,
See Note 3
VCC = MAX, VI = –15 V –1 –1.7
mA
p
VIH = 2.7 V 20
IIHHigh-level enable-input current
V
CC
=
MAX
VIH = 5.25 V 100
µ
A
I
IL
Low-level enable-input current VCC = MAX, VIL = 0.4 V –100 µA
r
i
Input resistance 12 18 kΩ
I
OS
Short-circuit output current
VCC = MAX,
See Note 4
VID = 3 V, VO = 0,
–15 –78 –130 mA
I
CC
Supply current VCC = MAX, Outputs disabled 22 35 mA
†
For conditions shown as MIN or MAX, use the appropriate values specified under recommended operating conditions.
‡
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.
NOTES: 3. Refer to ANSI Standards EIA/TIA-422-B and EIA/TIA-423-A for exact conditions.
4. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
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