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74HC/HCT192 View Datasheet(PDF) - Philips Electronics

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74HC/HCT192 Datasheet PDF : 13 Pages
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Philips Semiconductors
Presettable synchronous BCD decade
up/down counter
Product speciļ¬cation
74HC/HCT192
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.10 Waveforms showing the master reset input (MR) pulse width, MR to Qn propagation delays, MR to CPU,
CPD removal time and output transition times.
The shaded areas indicate when the input is permitted
to change for predictable output performance.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.11 Waveforms showing the data input (Dn) to parallel load input (PL) set-up and hold times.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.12 Waveforms showing the data input (Dn), parallel load input (PL) and the master reset input (MR) to the
terminal count outputs (TCU, TCD) propagation delays.
December 1990
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