參數(shù)資料
型號(hào): UPD4991ACX
廠(chǎng)商: NEC Corp.
英文描述: 4-BIT PARALLEL I/O CALENDAR CLOCK
中文描述: 4位并行I / O日歷鐘
文件頁(yè)數(shù): 6/32頁(yè)
文件大?。?/td> 133K
代理商: UPD4991ACX
μ
PD4991A
6
Write Cycle (V
DD
= 2.7 to 3.6 V, T
a
= –40 to +85
°
C)
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
CONDITIONS
Cycle Time
t
WC
210
CS-WE Reset Time
t
CW
170
Address-WE Reset Time
t
AW
170
Address-WE Setup Time
t
AS
0
Write Pulse Width
t
WP
30
ns
Address Hold Time
t
WR
20
Input Data Setup Time
t
DW
100
Input Data Hold Time
t
DH
0
WE-Output Floating Time
t
WHZ
70
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