ITT - Index of

ITT
ITT9601
Retriggerable Monostable Multivibrator TTL
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SEMICONDUCTORS
RETRIGGERABlE
MONOSTABlE
MUlTIVIBRATOR TTL
e Complementary Outputs and Complementary
DC level sensitive inputs..,.. insensitive to
input pulse transition time.
e"Leading edge" or "trailing edge" triggering.
eHigh speed operation - maximum input
repetition rate greater than 10 MHz.
e High noise immunity - 400 mV worst case.
e High fanout - up to 8 TTL loads.
eAccurate timing - determined by external R
and C - 50 nsec. to output pulse width
range.
oChoice of operating mode - inputs can
normally allow retriggering, but can also be
locked out.
elnput diode clamps prevent ringing.
e Logic levels are compatible with ITT DTL 930,
ITT TTL 9000, MSI and other DTL and TTL
families.
ePulse width compensated for Vee and
temperature variations.
ABSOLUTE MAXIMUM RATINGS
Characteristics
Units
Storage Temperature
-65 to + 150 C
Temperature (Ambient) Under Bias
-55to + 125 C
Vcc Pin Potential to Ground
(See Note 1) -0.5 to + 8.0 Volts
Input Voltage (D.C.)
(See Note 2) -0.5 to + 5.5 Volts
Input Current (See Note 2)
-30 to + 5.0 rnA
Voltage Applied to Output When
Output is High 0 V to + Vcc value
Current Into Output When
Output is Low 50 rnA
(1) The maximum VCC value of 8.0 volts Is not the primary
factor in determining the maximum VCC which may be
!lPplied to a number of interconnected devices, Tlle volt­
"age at a high output is approximatelY1 VBE below the
VCC voltage so the primary limit on the VCC is that the
voltage at any input may not go above 5.5 V unless the
current Is limited, so this effectively limits the system
VCC to approximately 7.0 volts.
NOTES:
Packages: 14 lead Dip and Flat Pack
The retriggerable monostable multivibrator or
one-shot provides an output pulse with high
accuracy and a very wide duration range (50
nsec. to to). It has four DC level-sensitive
inputs, two are active-level High and two are
active-level Low. Designed" for high speed
operation, the ITT9601 will respond to trigger
inputs even when already in its active timing
state, and will time itself out from the last input
pulse received.
The unique design of the ITT9601 makes it very
useful in applications such as in square-wave
and variable delay pulse generators, long delay
timers, pulse absence detectors, digital
low-pass filters, and even FM demodulators.
FUNCTIONAL DESCRIPTION
The 9601 monostable multivibrator has four
inputs, two of which are active level high and
two active level low. This allows a choice of
leading edge or trailing edge triggering. The
inputs are D.C. coupled making triggering
independent of input transition times.
Each time the input conditions for triggering
are met, the external capacitor is discharged in
a short time and a new cycle is begun.
Successive inputs with a period shorter than
the delay time retrigger the 9601 and result in a
continuous true output. Retriggering may be
inhibited by tying the negation (0) output back
to an active level high input.
Active pullups are provided for good drive
capability into capacitive loads.
(2) Because of the input clamp diodes, excess current can be
drawn out of the inputs if the D.C. input voltage is more
negative than -0.5 v. The diode is designed to clamp off
large negative A.C. swings associated with fast fall times
and long lines. This maximum rating is intended only to
Jimit the steady state input voltage and current.
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