參數(shù)資料
型號(hào): DS2252T
廠商: DALLAS SEMICONDUCTOR
元件分類: 微控制器/微處理器
英文描述: Secure Microcontroller Module(安全的微控制器模塊)
中文描述: 8-BIT, MICROCONTROLLER, SMA40
封裝: SIMM-40
文件頁數(shù): 9/15頁
文件大?。?/td> 125K
代理商: DS2252T
DS2252T
021998 9/15
AC CHARACTERISTICS
(t
A
= 0
°
C to70
°
C; V
CC
=0V to 5V)
MAX
UNITS
PARAMETER
SYMBOL
MIN
TYP
NOTES
SDI Pulse Reject
(4.5V<V
CC
<5.5V)
(V
CC
=0V, V
BAT
=2.9V)
t
SPR
2
4
μ
s
10
SDI Pulse Accept
(4.5V<V
<5.5V)
(V
CC
=0V, V
BAT
=2.9V)
t
SPA
10
50
μ
s
10
AC CHARACTERISTICS
EXPANDED BUS MODE TIMING SPECIFICATIONS
(t
A
= 0
°
C to70
°
C; V
CC
= 5V + 10%)
MIN
MAX
#
PARAMETER
SYMBOL
UNITS
1
Oscillator Frequency
1/t
CLK
1.0
16 (–16)
MHz
2
ALE Pulse Width
t
ALPW
2t
CLK
–40
ns
3
Address Valid to ALE Low
t
AVALL
t
CLK
–40
ns
4
Address Hold After ALE Low
t
AVAAV
t
CLK
–35
ns
14
RD Pulse Width
t
RDPW
6t
CLK
–100
ns
15
WR Pulse Width
t
WRPW
6t
CLK
–100
ns
16
RD Low to Valid Data In @12 MHz
@16 MHz
t
RDLDV
5t
CLK
–165
5t
CLK
–105
ns
ns
17
Data Hold after RD High
t
RDHDV
0
ns
18
Data Float after RD High
t
RDHDZ
2t
CLK
–70
ns
19
ALE Low to Valid Data In @12 MHz
@16 MHz
t
ALLVD
8t
CLK
–150
8t
CLK
–90
ns
ns
20
Valid Addr. to Valid Data In @12 MHz
@16 MHz
t
AVDV
9t
CLK
–165
9t
CLK
–105
ns
ns
21
ALE Low to RD or WR Low
t
ALLRDL
3t
CLK
–50
3t
CLK
+50
ns
22
Address Valid to RD or WR Low
t
AVRDL
4t
CLK
–130
ns
23
Data Valid to WR Going Low
t
DVWRL
t
CLK
–60
ns
24
Data Valid to WR High @12 MHz
@16 MHz
t
DVWRH
7t
CLK
–150
7t
CLK
–90
ns
ns
25
Data Valid after WR High
t
WRHDV
t
CLK
–50
ns
26
RD Low to Address Float
t
RDLAZ
0
ns
27
RD or WR High to ALE High
t
RDHALH
t
CLK
–40
t
CLK
+50
ns
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