line drivers. LM75121 Datasheet

LM75121 drivers. Datasheet pdf. Equivalent


Part LM75121
Description dual line drivers
Feature ..N..... .L..n.. Line Drivers/Receivers :E ....I ,... LM55121/LM75121 dual line drivers N :..g. .
Manufacture National Semiconductor
Datasheet
Download LM75121 Datasheet


..N..... .L..n.. Line Drivers/Receivers :E ....I ,... LM5 LM75121 Datasheet
Recommendation Recommendation Datasheet LM75121 Datasheet




LM75121
..N.....
.L..n.. Line Drivers/Receivers
:E
....I
,... LM55121/LM75121 dual line drivers
N
:..g. general description
features
:E The LM55121/LM75121 are monolithic dual line
....I drivers designed to drive long lengths of coaxial
cable, strip line, or twisted pair transmission lines
• Designed for digital data transmission over 50
to 500 ohms coaxial cable, strip line, or
twisted pair transmission lines
having impedances from 50 to 500 ohms. Both
are compatible with standard TTL logic and
• TTL compatible
supply voltage levels.
• Open emitter-follower output structure for
The LM55121/LM75121 will drive terminated low
party-line operation
impedance lines due to the low·impedance emitter·
follower outputs. In addition the outputs are
• Short-circuit protection
uncommitted allowing two or more drivers to
drive the same line.
• AND-OR logic configuration
Output short-circuit protection is incorporated
• High speed (max propagation delay time 20 ns)
to turn off the output when the output voltage
• Plug-in replacement for the SN55121 and the
drops below ,approximately 1.5V.
BT13
connection diagram
Dual-In-Line Package
2F 2E 20 2C 2B 2A 2V
16 15 14
lA 1B lC 10 IE IF IV GNO
TOPVIEW
typical performance
cha racteristics
Output Current vs Output Voltage
J-300
c)5.6v
<' -250
V1H '" 2.0V
..,§....
~ -200
T.:25°C
g;
u -150
I'\.
5
~ -100
f\
c
I
..p -50
I-r-.
o
"\
o 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Vo - OUTPUT VOLTAGE (V)
truth table
Order Number LM55121J or LM75121J
See Package 17
Order Number LM75121N
See Package 23
INPUTS
A BC DEF
OUTPUT
y
HH HHXX
X XXXHH
All Other Input CombinatIOns
H
H
L
H = hIgh level, L =low level, X =..relevant
ac test circuit and switching time waveforms
30V
)--I--....--+--o OUTPUT
Cc
(NOTE B)
Note A' The pulse generators have the following characteristics
lOUT ~ son, tw = 200 ns, duty cycle = 50%, tr = If ;: 5.0 ns
Note 8: CL Includes probe and JIU capacitance
::;; 5.0 n5
30V-!--}=-=i
INPUT
OUTPUT
Voc
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LM75121
absolute maximum ratings
(Notes 1 and 2)
Supply Voltage, VCC
Input Voltage
Output Voltage
Output Current
Continuous Total Dissipation at (or below)
25°C Free-Air Temperature (Note 5)
Lead Temperature (Soldering, 10 seconds)
6.0V
6.0V
6.0V
-75mA
800mW
300°C
operating conditions
MIN MAX
Supply Voltage, VCC
Temperature, T A
LM55121
LM75121
4.75
-55
0
5.25
+125
+75
UNITS
V
sr-:
...(J1
(J1
to.)
~
s.r..-:..
(J1
......to.)
electrical characteristics (Note 3) VCC = 4.75V to 5.25V (unless otherwise noted)
PARAMETER
High Level Input Voltage (V ,H )
Low Level Input Voltage (V ,L )
Input Clamp Voltage (V,)
Input Breakdown Voltage V(BR)I
High Level Output Voltage (V OH )
High Level Output Current (lOH)
Low Level Output Current (l oL )
Off State Output Current (10 (OFF))
High Level Input Current (I,H)
Low Level Input Current (lId
Short CirCUit Output Current (los)
Supply Current, Outputs High (leeH)
Supply Current, Outputs Low (l eeL )
CONDITIONS
MIN
2.0
Vee = 5.0V, I, = -12 mA
Vce = 5.0V, I, = 10 mA
5.5
V ,H = 2.0V, IOH =-75 mA (Note 4)
2.4
Vee = 5.0V, V ,H = 4.75V, VOH = 2.0V, -100
TA = 25°C (Note 4)
V'L = 0.8V, VOL = O.4V (Note 4)
Vee = OV, Vo = 3.0V
V, = 4.5V
V, = O.4V
Vee =5.0V, TA =25°C
-01
Vee = 5.25V, All Inputs at 2.0V,
Outputs Open
Vee = 5.25V, All Inputs at 0.8V,
Outputs Open
TYP
MAX
0.8
-1.5
-250
-800
500
40
-16
-30
28
60
UNITS
V
V
V
V
V
mA
mA
rnA
mA
mA
switch ing characteristics Vee = 5.0V, TA =25°C
PARAMETER
PropagatIon Delay Time, Low to HIgh
Level Output (tPLH)
Propagation Delay Time, HIgh to Low
Level Output (tPHe!
Propagation Delay Time, Low to High
Level Output (tPLH)
Propagation Delay Time, High to Low
Level Output (tPHL)
CONDITIONS
RL = 37D, CL = 15 pF
(See AC Test Circuit and SWitching
Time Waveforms)
RL =37D, CL = 1000 pF
(See AC Test Circuit and SWitching
Time Waveforms)
MIN
TYP
11
80
22
20
MAX
20
20
50
50
UNITS
ns
ns
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 meant to 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 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 3: Minimax limits apply across the guaranteed operating temperature range of -55°C to +125°C for LM55121 and O°C
to +75°C for LM75121, unless otherwise specified. Typicals are for Vce = 5.0V, TA = 25°C. Positive current IS defined as cur-
rent IOta the referenced pin.
Note 4: The output voltage and current limits are guaranteed for any appropriate combination of high and low inputs
specified by the truth table for the des; red output.
Note 5: For operating at elevated temperatures, the cavity DIP package (J) must be derated based on a thermal resistance of
+85°C/W, junction to ambient. The molded DIP package (N) must be derated based on a thermal resistance of +150°C/W,
junction to ambient.
4-41







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