參數(shù)資料
型號(hào)： 74HC40102
廠商： NXP Semiconductors N.V.
元件分類： 通用總線功能
英文描述： 8-bit synchronous BCD down counter
中文描述： 8位同步BCD碼遞減計(jì)數(shù)器
文件頁(yè)數(shù)： 10/11頁(yè)
文件大小： 85K
代理商： 74HC40102
December 1990
10
Philips Semiconductors
Product specification
8-bit synchronous BCD down counter
74HC/HCT40102
AC WAVEFORMS
Fig.7
Waveforms showing the clock input (CP) to
TC propagation delays, the clock pulse
width, the output transition times 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.8
Waveforms showing the TE to
TC 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.9
Waveforms showing PL, MR, P
n
to
TC 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.10 Waveforms showing removal time for
MR and PL.
(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 hold and set-up times
for MR or PE to CP.
(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 hold and set-up times
for P
n
, PE to CP.
The shaded areas indicate when the input is permitted to
change for predictable output performance.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
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