74HCT191D 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

74HCT191D

Presettable synchronous 4-bit binary up/down counter

Philips Electronics 

Philips Semiconductors

Presettable synchronous 4-bit binary

up/down counter

AC WAVEFORMS

Product specification

74HC/HCT191

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

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

Fig.10 Waveforms showing the clock (CP) 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.11 Waveforms showing the clock and count enable inputs (CP, CE) to ripple clock output (RC) propagation

delays.

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

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

Fig.12 Waveforms showing the input (Dn) to output (Qn) propagation delays.

December 1990

12

Share Link: