Download DS55122 Triple Line Receiver

General Description
Features
The DS55122 is a triple line receiver designed for digital data
transmission with line impedances from 50Ω to 500Ω. Each
receiver has one input with built-in hysteresis which provides
a large noise margin. The other inputs on each receiver are
in a standard TTL configuration. The DS55122 is compatible
with standard TTL logic and supply voltage levels.
n
n
n
n
n
n
n
Connection Diagram
Truth Table
Built-in input threshold hysteresis
High speed—typical propagation delay time 20 ns
Independent channel strobes
Input gating increases application flexibility
Single 5.0V supply operation
Fanout to 10 series standard loads
Plug-in replacement for the SN55122
Inputs
Dual-In-Line Package
DS55122 Triple
DS55122
Triple Line Receiver
DS55122 Triple Line Receiver
March 1992
Output
A
B†
R
S
Y
H
H
X
X
L
X
X
L
H
L
L
X
H
X
H
L
X
X
L
H
X
L
H
X
H
X
L
X
L
H
H = high level, L = low level, X = irrelevant
†
B input and last two lines of the truth table are applicable to receivers
1 and 2 only.
DS010816-1
Top View
For Complete Military 883 Specifications,
see RETS Data Sheet.
Order Number DS55122J/883 or DS55122W/883
See NS Package Number J16A or W16A
AC Test Circuit and Switching Time Waveforms
DS010816-2
Note 1: The pulse generator has the following characteristics: ZOUT ≈ 50Ω, tW
= 200 ns, duty cycle = 50%, tr = tf = 5.0 ns.
DS010816-3
Note 2: CL includes probe and jig capacitance.
© 1997 National Semiconductor Corporation
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DS010816
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1
Absolute Maximum Ratings
(Note 4)
Lead Temperature
(Soldering, 10 sec.)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
Input Voltage
R Input
A, B, or S Input
Output Voltage
Output Current
Maximum Power Dissipation
at 25˚C (J)
Storage Temperature Range
300˚C
Operating Conditions
6.0V
Supply Voltage (VCC)
Operating Temperature (TA)
DS55122
High Level Output Current
(IOH)
Low Level Output Current
(IOL)
6.0V
5.5V
6.0V
± 100 mA
1433 mW
−65˚C to +150˚C
Min
4.75
Max
5.25
Units
V
−55
+125
˚C
−500
µA
16
mA
Note 3: Derate cavity package 9.6 mW/˚C above 25˚C; derate molded package 10.9 mW/˚C above 25˚C.
Electrical Characteristics (Notes 5 and 6)
VCC = 4.75V to 5.25V (unless otherwise noted)
Symbol
Parameter
Conditions
VIH
High Level Input Voltage
A, B, R, or S
VIL
Low Level Input Voltage
A, B, R, or S
VCC = 5.0V, TA = 25˚C, R, (Note 6)
VCC = 5.0V, II = −12 mA, A, B, or S
VT+–VT−
Hysteresis
Input Clamp Voltage
II
Input Clamp at Max Input
Voltage
VCC = 5.25V, VIN = 5.5V, A, B, or S
VOH
High Level Output Voltage
IOH = −500 µA
Low Level Output Voltage
IOL = 16 mA
Typ
Max Units
2.0
VI
VOL
Min
0.3
VIH = 2V, VIL = 0.8V, (Note 4)
VI(A) = 0V, VI(B) = 0V,
VI(R) = 1.45V, VI(S) = 2.0V, (Note 7)
VIH = 2.0V, VIL = 0.8V, (Note 4)
V
0.8
V
−1.5
V
1.0
mA
0.6
V
2.6
V
2.6
V
VI(A) = 0V, VI(B) = 0V,
VI(R) = 1.45V, VI(S) = 2.0V, (Note 8)
IIH
High Level Input Current
IIL
Low Level Input Current
IOS
Short Circuit Output Current
ICC
Supply Current
VI = 4.5V, A, B, or S
VI = 3.8V, R
VI = 0.4V, A, B, or S
VCC = 5.0V, TA = 25˚C, (Note 5)
VCC = 5.25V
0.4
V
0.4
V
40
µA
170
µA
−0.1
−1.6
mA
−50
−100
mA
72
mA
Switching Characteristics
VCC = 5.0V, TA = 25˚C
Symbol
tPLH
tPHL
Parameter
Conditions
Propagation Delay Time, Low-to-High
(See AC Test Circuit and Switching
Level Output from R Input
Time Waveforms)
Propagation Delay Time, High-to-Low
(See AC Test Circuit and Switching
Level Output from R Input
Time Waveforms)
Min
Typ
Max
Units
20
30
ns
20
30
ns
Note 4: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Except for “Operating Temperature Range” they
are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation.
Note 5: All currents into device pins are shown as positive, currents out of device pins shown as negative, all voltage values are referenced with respect to network
ground terminal, unless otherwise noted. All values shown as max or min on absolute value basis.
Note 6: Min/max limits apply across the guaranteed operating temperature range of −55˚C to +125˚C for DS55122 and 0˚C to +75˚C for DS75122, unless otherwise
specified. Typicals are for VCC = 5.0V, TA = 25˚C. Positive current is defined as current into the referenced pin.
Note 7: The output voltage and current limits are guaranteed for any appropriate combination of high and low inputs specified by the truth table for the desired output.
Note 8: Not more than one output should be shorted at a time.
Note 9: Hysteresis is the difference between the positive going input threshold voltage, VT+, and the negative going input threshold voltage, VT−.
Note 10: Receiver input was at a high level immediately before being reduced to 1.45V.
Note 11: Receiver input was at a low level immediately before being raised to 1.45V.
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PrintDate=1997/04/02 PrintTime=07:23:10 7206 ds010816 Rev. No. 1
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Typical Performance Characteristics
Output Voltage vs
Receiver Input Voltage
DS010816-4
Typical Applications
Book
Extract
End
DS010816-5
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Typical Applications
(Continued)
Book
Extract
End
Pulse Squaring
DS010816-6
The high gain and built-in hystersis of the DS55122
line receiver enables it to be used as a
Schmitt trigger in squaring up pulses.
http:\\www.national.com
PrintDate=1997/04/02 PrintTime=07:23:11 7206 ds010816 Rev. No. 1
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THIS PAGE IS IGNORED IN THE DATABOOK
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PrintDate=1997/04/02 PrintTime=07:23:11 7206 ds010816 Rev. No. 1
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DS55122 Triple Line Receiver
Physical Dimensions
inches (millimeters)
Order Number DS55122J/883
NS Package Number J16A
Order Number DS55122W/883
NS Package Number W16A
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2. A critical component in any component of a life support
1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into
sonably expected to cause the failure of the life support
the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness.
ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
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PrintDate=1997/04/02 PrintTime=07:23:12 7206 ds010816 Rev. No. 1
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