參數(shù)資料
型號(hào): 74F269SCX
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 通用總線功能
英文描述: Synchronous Up/Down Counter
中文描述: F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDSO24
封裝: 0.300 INCH, MS-013, SOIC-24
文件頁數(shù): 8/14頁
文件大?。?/td> 118K
代理商: 74F269SCX
Philips Semiconductors
Product specification
74F269
8–bit bidirectional binary counter
1996 Jan 05
8
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
The shaded areas indicate when the input is permitted to change for predictable output performance.
t
PHL
V
M
t
PHL
V
M
V
M
V
M
1/f
MAX
t
W
(L)
CP
Q
n
t
W
(H)
V
M
V
M
t
PLH
t
PLH
V
M
TC
SF00791A
Waveform 1. Propagation Delay, Clock Input to Output,
Clock Pulse Width, and Maximum Clock Frequency
V
M
V
M
V
M
V
M
t
PLH
t
PHL
CET
TC
SF00792
Waveform 2. Propagation Delay,
CET Input to Terminal Count Output
V
M
V
M
V
M
t
PLH
t
PHL
V
M
U/D
TC
SF00793
Waveform 3. Propagation Delay, Up/Down Count Control Input
to Terminal Count Output
CP
V
M
V
M
V
M
V
M
V
M
V
M
t
s
t
s
(L)
t
s
(H)
t
h
= 0
t
h
= 0
Pn
PE
SF00844
V
M
V
M
t
h
Waveform 4. Parallel Data and Parallel Enable
Setup and Hold Times
CP
Q
n
V
M
V
M
V
M
V
M
t
h
(L)
t
h
(H)
CET
CEP
t
s
(H)
t
s
(L)
COUNT
NO CHANGE
SF00842
V
M
V
M
Waveform 5. Count Enables Setup and Hold Times
CP
V
M
V
M
V
M
V
M
t
s
(H)
t
h
t
h
t
s
(L)
COUNT UP
COUNT DOWN
U/D
Q
n
SF00839
V
M
V
M
Waveform 6. Up/Down Count Control Setup and Hold Times
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