參數(shù)資料
型號(hào): DS21Q50N
英文描述: Telecommunication IC
中文描述: 通信集成電路
文件頁(yè)數(shù): 86/99頁(yè)
文件大?。?/td> 325K
代理商: DS21Q50N
DS21Q50
Page 86 of 99
24. AC TIMING PARAMETERS AND DIAGRAMS
24.1 MULTIPLEXED BUS AC CHARACTERISTICS
AC CHARACTERISTICS –
MULTIPLEXED PARALLEL PORT
(MUX = 1)
[See Figure 24-1 to Figure 24-3]
PARAMETER
Cycle Time
Pulse Width, DS low or RD* high
Pulse Width, DS high or RD* low
Input Rise/Fall times
R/W* Hold Time
R/W* Set Up time before DS high
CS* Set Up time before DS, WR* or
RD* active
CS* Hold time
Read Data Hold time
Write Data Hold time
Muxed Address valid to AS or ALE
fall
Muxed Address Hold time
Delay time DS, WR* or RD* to AS or
ALE rise
Pulse Width AS or ALE high
Delay time, AS or ALE to DS, WR*
or RD*
Output Data Delay time from DS or
RD*
Data Set Up time
(0
°
C to 70
°
C; V
DD
= 3.3.0V
±
5% for
DS21Q50L;
-40
°
C to +85
°
C; V
DD
= 3.3.0V
±
5% for
DS21Q50LN)
UNITS
ns
ns
ns
ns
ns
ns
ns
SYMBOL
t
CYC
PW
EL
PW
EH
t
R
, t
F
t
RWH
t
RWS
t
CS
MIN
200
100
100
10
50
20
TYP
MAX
20
NOTES
t
CH
t
DHR
t
DHW
t
ASL
0
10
0
15
ns
ns
ns
ns
50
t
AHL
t
ASD
10
20
ns
ns
PW
ASH
t
ASED
30
10
ns
ns
t
DDR
20
140
ns
t
DSW
50
ns
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