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TC4403
1.5A HIGH-SPEED, FLOATING LOAD DRIVER
GENERAL DESCRIPTION
FEATURES
The TC4403 is a modified version of the TC4425 driver,
intended to drive floating or isolated loads requiring high-
current pulses. The load is intended to be connected be-
tween the outputs without other reference to supply or
ground. Then, only when both logic inputs and the VDD input
are energized, is power supplied to the load. This construc-
tionallowstheimplementationofawidevarietyofredundant
input controllers.
ThelowOFF-stateoutputleakageandindependenceof
thetwohalf-circuitspermitawidevarietyoftestingschemes
to be utilized to assure functionality. The high peak current
capability, short internal delays, and fast output rise and fall
times ensure that sufficient power will be available to the
load when it is needed. The TTL and CMOS compatible
inputs allow operation from a wide variety of input devices.
The ability to swing the inputs negative without affecting
device performance allows negative biases to be placed on
the inputs for greater safety. In addition, the capacitive
nature of the inputs allows the use of series resistors on the
inputs for extra noise suppression.
■ Low Quiescent Current ......................... 300µA Max
■ Capacitive Inputs With 300mV Hysteresis
■ Both Inputs Must Be Driven to Drive Load
■ Low Output Leakage
■ High Peak Current Capability
■ Fast Output Rise Time
■ Outputs Individually Testable
APPLICATIONS
■ Isolated Load Drivers
■ Pulsers
■ Safety Interlocks
ORDERING INFORMATION
Temperature
Part No.
Package
Range
TC4403CPA
TC4403EPA
TC4403MJA
8-Pin PDIP
8-Pin PDIP
8-Pin CerDIP
0°C to 70°C
– 40°C to +85°C
– 55°C to +125°C
The TC4403 is built for outstanding ruggedness and
reliability in harsh applications. Input voltage excursions
above the supply voltage or below ground are clamped
internally without damaging the device. The output stages
are power MOSFETs with high-speed body diodes to pre-
vent damage to the driver from inductive kickbacks.
PIN CONFIGURATION
NC
)
1
2
3
4
8
7
6
5
NC
IN (V
OUT (V
)
DD
DD
GND
V
TC4403
DD
IN (GND)
OUT (GND)
(TOP VIEW)
FUNCTIONAL BLOCK DIAGRAM
6
V
DD
7
5
OUT (V
)
DD
300mV INPUT
HYSTERESIS
OUT (GND)
4
IN (GND)
2
IN (V
)
DD
TC4403
3
GND
EFFECTIVE INPUT
C = 20pF
(EACH INPUT)
TC4403-6 10/11/96
TELCOM SEMICONDUCTOR, INC.
4-213