74HC/HCT192 查看數據表（PDF） - Philips Electronics

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74HC/HCT192

Presettable synchronous BCD decade up/down counter

Philips Electronics 

Philips Semiconductors

Presettable synchronous BCD decade

up/down counter

AC WAVEFORMS

Product specification

74HC/HCT192

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.7 Waveforms showing the clock (CPU, CPD) to output (Qn) propagation delays, the clock pulse width and

the maximum clock pulse frequency.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.8 Waveforms showing the clock (CPU, CPD) to terminal count output (TCU, TCD) propagation delays.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.9 Waveforms showing the parallel load input (PL) and data (Dn) to Qn output propagation delays and PL

removal time to clock input (CPU, CPD).

December 1990

11

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