参数资料
型号: DS2252T-64-16
厂商: DALLAS SEMICONDUCTOR
元件分类: Microcontroller
英文描述: 8-BIT, MICROCONTROLLER, SMA40
封装: SIMM-40
文件页数: 15/15页
文件大小: 125K
代理商: DS2252T-64-16
DS2252T
021998 9/15
AC CHARACTERISTICS
(tA = 0°C to70°C; VCC=0V to 5V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
SDI Pulse Reject
(4.5V<VCC<5.5V)
(VCC=0V, VBAT=2.9V)
tSPR
2
4
s
10
SDI Pulse Accept
(4.5V<VCC<5.5V)
(VCC=0V, VBAT=2.9V)
tSPA
10
50
s
10
AC CHARACTERISTICS
EXPANDED BUS MODE TIMING SPECIFICATIONS
(tA = 0°C to70°C; VCC = 5V + 10%)
#
PARAMETER
SYMBOL
MIN
MAX
UNITS
1
Oscillator Frequency
1/tCLK
1.0
16 (–16)
MHz
2
ALE Pulse Width
tALPW
2tCLK–40
ns
3
Address Valid to ALE Low
tAVALL
tCLK–40
ns
4
Address Hold After ALE Low
tAVAAV
tCLK–35
ns
14
RD Pulse Width
tRDPW
6tCLK–100
ns
15
WR Pulse Width
tWRPW
6tCLK–100
ns
16
RD Low to Valid Data In @12 MHz
@16 MHz
tRDLDV
5tCLK–165
5tCLK–105
ns
17
Data Hold after RD High
tRDHDV
0
ns
18
Data Float after RD High
tRDHDZ
2tCLK–70
ns
19
ALE Low to Valid Data In @12 MHz
@16 MHz
tALLVD
8tCLK–150
8tCLK–90
ns
20
Valid Addr. to Valid Data In @12 MHz
@16 MHz
tAVDV
9tCLK–165
9tCLK–105
ns
21
ALE Low to RD or WR Low
tALLRDL
3tCLK–50
3tCLK+50
ns
22
Address Valid to RD or WR Low
tAVRDL
4tCLK–130
ns
23
Data Valid to WR Going Low
tDVWRL
tCLK–60
ns
24
Data Valid to WR High @12 MHz
@16 MHz
tDVWRH
7tCLK–150
7tCLK–90
ns
25
Data Valid after WR High
tWRHDV
tCLK–50
ns
26
RD Low to Address Float
tRDLAZ
0
ns
27
RD or WR High to ALE High
tRDHALH
tCLK–40
tCLK+50
ns
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