ITT - Index of

ITT
ITT342, ITT342H
DUAL MONOST ABLE MUL TIVIBRA TOR
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SEMICONDUCTORS
DUAL MONOST ABLE MUL TIVIBRATOR
Two completely Independent one-shots are
provided on the 342 chip. Each one shot has
an expandable trigger and provides compli­
. mentary output pulses of any length, as determined
by an external timing capacitor. Outputs
are active-high.
The 342 is triggered on the positive going edge
of the input pulse. Maximum operating frequency
is limited by the pulse width and recovery
time of the particular circuit application.
An external timing capacitor is required
in conjunction with an internal or external timing
resistor.
Pulse width is determined by the formula PW=
0.7 RC, with PW in Nanoseconds, R in ohms,
and C in Picofarads. The timing capacitor C
has no restriction. on value, but the timing resistor
should be held between 2 and 62 kO
An internal 20 Km ±2S % resistor is provided
for normal applications.
Recovery time is given by T R == 3C with
T R in Nanoseconds and C in Picofarads. This
is the time required to recharge the timing capacitor
to the proper voltage.
Pin Configuration
Schematic (Each Multivibrator)
8.2ft 1.1I( 110
ABSOLUTE MAXIMUM RATINGS
Characteristics
Units
Storage Temperature Range.. 6S' to +1S0'C
Operating Temperature Range
342H-1, 342-1 ........• -SS'C to +125'C
342H-S ................ -30'C to +7S'C
342-S .................. -30'C to +8S'C
Lead Temperature, 1/16 inch from
case, 60 seconds Maximum ....•..• 300'C
Supply Voltage
Continuous .....................• +16.5V
Pulsed 0.1 Second .............•'... 18V
Input Voltage (exclusive of expanders)
342-1, 342-S .............. - O.SV to 16.SV
342H-1,342H-S .............' -0.5Vto 18V
Input Voltage - Expanders ........ OV to 6.0V
Voltage applied to output ...... -O.SV to Vee
"-------++~i---+-+-+---+__ +-_o'.ND
EXT
CAP
Sink Current, Continuous Buffers 80mA
All Other Devices ........•........ 2SmA
Output short circuit duration
to ground ................... Continuous
(Not more than 1 output shorted simultaneously)
Maximum package power dissipation (free air)
at +12S' ................•..•.. SOOmw
at +8S' .....................•.. 900mw
C
D
1.81(
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