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TC4404 Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc

Part No. TC4404
Description  1.5A DUAL OPEN-DRAIN MOSFET DRIVERS
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Maker  TELCOM [TelCom Semiconductor, Inc]
Homepage  http://www.telcom-semi.com
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TC4404 Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc

   
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TELCOM SEMICONDUCTOR, INC.
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TC4404
TC4405
INPUT
GND
EFFECTIVE
INPUT
C 12 pF
300 mV
VDD
PULL UP
PULL DOWN
2 (3)
A (B)
8 (6)
7 (5)
4
1
TC4404
INVERTING
TC4405
NONINVERTING
4.7V
FEATURES
s
Independently-Programmable Rise and Fall Times
s
Low Output Impedance ................................ 7
Ω Typ
s
High Speed tR, tF ....... <30 nsec with 1000 pF Load
s
Short Delay Times .................................... < 30 nsec
s
Wide Operating Range .......................... 4.5V to 18V
s
Latch-Up Protected ......... Will Withstand >500 mA
Reverse Current (Either Polarity)
s
Input Withstands Negative Swings Up to –5V
APPLICATIONS
s
Motor Controls
s
Driving Bipolar Transistors
s
Driver for Nonoverlapping Totem Poles
s
Reach-Up/Reach-Down Driver
1.5A DUAL OPEN-DRAIN MOSFET DRIVERS
GENERAL DESCRIPTION
The TC4404 and TC4405 are CMOS buffer-drivers
constructed with complementary MOS outputs, where the
drains of the totem-pole output have been left separated so
that individual connections can be made to the pull-up and
pull-down sections of the output. This allows the insertion
of drain-current-limiting resistors in the pull-up and/or pull-
down sections, allowing the user to define the rates of rise
and fall for a capacitive load; or a reduced output swing, if
driving a resistive load, or to limit base current, when
driving a bipolar transistor. Minimum rise and fall times,
with no resistors, will be less than 30 nsec for a 1000-pF
load. There is no upper limit.
For driving MOSFETs in motor-control applications,
where slow-ON/fast-OFF operation is desired, these de-
vices are superior to the previously-used technique of add-
ing a diode-resistor combination between the driver output
and the MOSFET, because they allow accurate control of
turn-ON, while maintaining fast turn-OFF and maximum
noise immunity for an OFF device.
When used to drive bipolar transistors, these drivers
maintain the high speeds common to other TelCom driv-
ers. They allow insertion of a base current-limiting resistor,
while providing a separate half-output for fast turn-OFF. By
proper positioning of the resistor, either npn or pnp transis-
tors can be driven.
For driving many loads in low-power regimes, these
drivers, because they eliminate shoot-through currents in
the output stage, require significantly less power at higher
frequencies, and can be helpful in meeting low-power
budgets.
Because neither drain in an output is dependent on
the other, these devices can also be used as open-drain
buffer/drivers where both drains are available in one device,
ORDERING INFORMATION
Part No.
Package
Temperature
Range
TC4404COA
8-Pin SOIC
0
°C to +70°C
TC4404CPA
8-Pin PDIP
0
°C to +70°C
TC4404EOA
8-Pin SOIC
– 40
°C to +85°C
TC4404EPA
8-Pin PDIP
– 40
°C to +85°C
TC4404MJA
8-Pin CerDIP
– 55
°C to +125°C
TC4405COA
8-Pin SOIC
0
°C to +70°C
TC4405CPA
8-Pin PDIP
0
°C to +70°C
TC4405EOA
8-Pin SOIC
– 40
°C to +85°C
TC4405EPA
8-Pin PDIP
– 40
°C to +85°C
TC4405MJA
8-Pin CerDIP
– 55
°C to +125°C
FUNCTIONAL BLOCK DIAGRAM
TC4404/5-6 10/21/96


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