74HC5555 Datasheet, PDF (11/23 Pages) NXP Semiconductors – Programmable delay timer with oscillator

Philips Semiconductors
Programmable delay timer with oscillator
Product specification
74HC/HCT5555
T_amb (°C)
TEST CONDITION
SYMBOL PARAMETER
+25
−40 to +85 −40 to +125 UNIT
MIN TYP MAX MIN MAX MIN MAX
V_CC
(V)
WAVEFORMS
f_max
maximum
2
5.9 −
1.8 −
1.3 −
MHz 2.0
Fig.8; note 3
clock pulse
10 18 −
8
−
6.6 −
MHz 4.5
frequency
12 21 −
10 −
8
−
MHz 6.0
f_max
maximum
6
24.8 −
4.8 −
4
−
MHz 2.0
Fig.9; note 4
clock pulse
30 75 −
24 −
20 −
MHz 4.5
frequency
35 89 −
28 −
24 −
MHz 6.0
Notes
1. One stage selected.
2. It is possible to retrigger directly after the trigger pulse, however the pulse will only be extended, if the time period
exceeds the clock input cycle time divided by 2.
3. One stage selected. The termination of the output pulse remains synchronized with respect to the falling edge of the
RS clock input.
4. One stage selected. The termination of the output pulse is no longer synchronized with respect to the falling edge of
the RS clock input.
September 1993
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