line receivers. LM55122 Datasheet

LM55122 receivers. Datasheet pdf. Equivalent


Part LM55122
Description triple line receivers
Feature Line Drivers/Receivers LM55122/LM75122 triple line receivers general description The LM55122/LM751.
Manufacture National Semiconductor
Datasheet
Download LM55122 Datasheet


Line Drivers/Receivers LM55122/LM75122 triple line receiver LM55122 Datasheet
Recommendation Recommendation Datasheet LM55122 Datasheet




LM55122
Line Drivers/Receivers
LM55122/LM75122 triple line receivers
general description
The LM55122/LM75122 are triple line receivers
designed for digital data transmission with line
impedances from 50n to 500n. 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
LM55122/LM75122 are compatible with standard
TTL logic and supply voltage levels.
features
• 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 54174 standard loads
• Plug-in replacement for the SN55122 and the
8T14
connection diagram
truth table
Dual-I n-Line Package
,.'"1A 1B
TOP VIEW
,v
Order Number LM55122J, LM75122J
See Package 17
Order Number LM75122N
See Package 23
INPUTS
A Bt R S
OUTPUT
Y
H HXX
XXL H
L XHX
L XXL
XL HX
XL XL
L
L
H
H
H
H
H = high level, L "" low level, X = Irrelevant
ts input and last two Imes of the truth table
are appilcable to receivers 1 and 2 only
ac test circuit and switching time waveforms
vee 2.GV
BUn
1N3D64
)o-~~~-""-OUTPUT
50k
:S;5Dru:
26V-f-~=-=-i
INPUT
NoteA. The pulse generator has tbefoltoWing characteristics
ZoUT "'" 50n, tw " 200 os, duty cvcle " 50%, I, '" If = 5 0 os.
NoteD CL Includes probe and 119 capacitance
4·42·



LM55122
absolute maximum ratings
(Notes 1 and 2)
Supply Voltage, Vee
6.0V
Input Vol tage
R Input
6.0V
A, B, or S Input
5.5V
Output Voltage
6.0V
Output Current
±100 rnA
Continuous Total Power Dissipation at (or
belowl 25'e Free-Air Temperature (Note 51 800 mW
Storage Temperature Range
-6SoC to +150°C
Lead Temperature (Soldering, 10 seconds I
300'e
operating conditions
MIN
MAX
Supply Voltage, Vee
4.75
5.25
Operating Temperature, TA
LM55122
-55
LM75122
0
High Level Output Current,
IOH
Low Level Output Current,
IOL
+125
+75
-500
16
UNITS
V
'e
'e
p.A
mA
r-
..3:
U'I
U'I
N
.N......
r-
..3....:.
U'I
N
N
electrical characteristics (Note 3) Vcc = 4.75V to 5.25V (unless otherwise noted)
PARAMETER
High Level Input Voltage (V 1H )
A, B, R, or S
Low Level Input Voltage (V1d
A, B, R, or S
HysteresIs (V T+ - VT-)
R
Input Clamp Voltage (Vd
A, 8, or S
Input Breakdown Voltage (V(BR)d
A, B, or S
High Level Output Voltage (VOH )
Low Level Output Voltage (VoLl
High Level Input Current (lIH)
A, B, orS
R
Low Level Input Current (IlL)
A, S, orS
Short CirCUit Output Current (los)
Supply Current (Ieel
CONDITIONS
Vee = 5.0V, TA = 25'C
(Note 71
Vee =SOV,I,=-12mA
Vee =50V,I,=10mA
V ,H =OV, V ,L =08V, 10H =-500IlA,
(Note 41
VI(A) = OV, VI{S) = OV, VI{S) = 2.0V,
VIIR) = 1.45V, (Note 81.IOH =-500IlA
V 1H = 2 av, V 1L = 0 8V, tOl = 16 mA,
(Note 41
VI(Al == OV, VI(Bl = OV, V1(S) = 20V,
VIIR) = 1.45V, (Note 91.10L = 16 mA
V, = 4 5V
V, = 3 8V
V, = O.4V
Vee = 5.0V, TA = 25'C, (Note 61
Vee = 5.25V
MIN TYP MAX
2.0
0.8
0.3 0.6
-1.5
5.5
2.6
26
0.4
0.4
40
170
-0.1 -1.6
-50 -100
72
UNITS
V
V
V
V
V
V
V
V
V
IlA
IlA
mA
mA
mA
switching characteristics Vee =5.0V, TA = 25°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Propagation Delay Time, Low to High Level
Output from R Input (tPLH)
Propagation Delay Time, High to low level
Output from R Input (tPHLl
(See AC Test CirCUit and SWitching
Time Waveforms)
20 30
20 30
ns
ns
Note 1: "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. Except for "Operating
Temperature Range" they are not meantto Imply that the devices should be operated at these limits. The table of "Electrical Characteristics"
prOVides conditions for actual deVice operation.
Note 2: All currents into device pms are shown as POSitive, currents out of deVice PinS shown as negative, aU voltage values are referenced
with respect to network ground termmal, unless otherwise noted. All values shown as max or min on absolute value basis.
Note 3: Min/max limits apply across the guaranteed operatmg temperature range of --55°C to +125°C for LM55122 and O°C to +75°C for
LM75122, unless otherWise specified TYPlcalsare for Vee'" 5 OV, TA = 25°C POSitive current IS defined as current IOta the referenced pin.
Note 4: The output voltage and current limits are guaranteed for any appropriate combination of high and low tnputs specified bv the truth
table for the desired output
Note 5: For operating at elevated temperatures, the cavity DIP package (J) has a maximum Junction temperature of +150°C and must be
derated based on a thermal resistance of +85°C/W, JunctIOn to ambient. The molded DIP package (N) haS a maximum junction temperature
of +150°C and must be derated based on a thermal resistance of +150°C/W~ Junction to ambient
Note 6: Not more than one output should be shorted at a time
Note 7: HysteresIs IS the difference between the positive gOing input threshold voltage, VT+. and the negative goIOg Input threshold
voltage, VT_.
Note 8: Receiver Input was at a high level Immediately before being reduced to 1.45V.
Note 9: Receiver Input was at a low level Immediately before bemg raised to 1.45V.
4-43







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