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PDF DS3668N Data sheet ( Hoja de datos )
| Número de pieza | DS3668N | |
| Descripción | Quad Fault Protected Peripheral Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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March 1995
DS3668 Quad Fault Protected Peripheral Driver
General Description
The DS3668 quad peripheral driver is designed for those
applications where low operating power high breakdown
voltage high output current and low output ON voltage are
required Unlike most peripheral drivers available a unique
fault protection circuit is incorporated on each output When
the load current exceeds 1 0A (approximately) on any out-
put for more than a built-in delay time nominally 12 ms that
output will be shut off by its protection circuitry with no effect
on other outputs This condition will prevail until that protec-
tion circuitry is reset by toggling the corresponding input or
the enable pin low for at least 1 0 ms This built-in delay is
provided to ensure that the protection circuitry is not trig-
gered by turn-on surge currents associated with certain
kinds of loads
The DS3668’s inputs combine TTL compatibility with high
input impedance In fact its extreme low input current al-
lows it to be driven directly by a MOS device The outputs
are capable of sinking 600 mA each and offer a 70V break-
down However for inductive loads the output should be
clamped to 35V or less to avoid latch up during turn off
(inductive fly-back protection refer AN-213) An on-chip
clamp diode capable of handling 800 mA is provided at
each output for this purpose In addition the DS3668 incor-
porates circuitry that guarantees glitch-free power up or
down operation and a fail-safe feature which puts the output
in a high impedance state when the input is open
The molded package is specifically constructed to allow in-
creased power dissipation over conventional packages The
four ground pins are directly connected to the device chip
with a special copper lead frame When the quad driver is
soldered into a PC board the power rating of the device
improves significantly
Applications
Y Relay drivers
Y Solenoid drivers
Y Hammer drivers
Y Stepping motor drivers
Y Triac drivers
Y LED drivers
Y High current high voltage drivers
Y Level translators
Y Fiber optic LED drivers
Features
Y Output fault protection
Y High impedance TTL compatible inputs
Y High output current 600 mA per output
Y No output latch-up at 35V
Y Low output ON voltage (550 mV typ 600 mA)
Y High breakdown voltage (70V)
Y Open collector outputs
Y Output clamp diodes for inductive fly-back protection
Y NPN inputs for minimal input currents (1 mA typical)
Y Low operating power
Y Standard 5V power supply
Y Power up down protection
Y Fail-safe operation
Y 2W power package
Y Pin-for-pin compatible with SN75437
Connection Diagram
Dual-In-Line Package
Truth Table
Top View
C1995 National Semiconductor Corporation TL F 5225
TL F 5225 – 1
IN EN OUT
HH
LH
HL
LL
L
Z
Z
Z
H e High state
L e Low state
Z e High impedance state
Order Number DS3668N
See NS Package Number N16E
RRD-B30M105 Printed in U S A
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet DS3668N.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DS3668 | Quad Fault Protected Peripheral Driver | National Semiconductor |
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| DS3668N | Quad Fault Protected Peripheral Driver | National Semiconductor |
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