參數(shù)資料
型號(hào): 74HC190PW
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 通用總線功能
英文描述: Presettable synchronous BCD decade up/down counter
中文描述: HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL DECADE COUNTER, PDSO16
文件頁(yè)數(shù): 12/13頁(yè)
文件大?。?/td> 101K
代理商: 74HC190PW
December 1990
12
Philips Semiconductors
Product specification
Presettable synchronous BCD decade
up/down counter
74HC/HCT190
AC WAVEFORMS
Fig.10 Waveforms showing the clock (CP) to
output (Q
n
) propagation delays, the clock
pulse width and the maximum clock pulse
frequency.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= 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 : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.12 Waveforms showing the input (D
n
) to output
(Q
n
) propagation delays.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.13 Waveforms showing the input (PL) to output
(Q
n
) propagation delays.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.14 Waveforms showing the up/down count
input (U/D) to terminal count and ripple
clock output (TC, RC) propagation delays.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.15 Waveforms showing the parallel load input
(PL) pulse width, removal time to clock (CP)
and the output (Q
n
) transition times.
(1) HC :
V
M
= 50%;
V
I
= GND to
V
CC
.
HCT :
V
M
= 1.3 V;
V
= GND to
3 V.
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