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DS2250T-64-16 Datasheet(PDF) 11 Page - Dallas Semiconductor

Part # DS2250T-64-16
Description  Soft Microcontroller Module
Download  19 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS2250T-64-16 Datasheet(HTML) 11 Page - Dallas Semiconductor

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DS2250(T)
121395 11/19
AC CHARACTERISTICS
EXPANDED BUS MODE TIMING SPECIFICATIONS
(tA = 0°C to70°C; VCC = 5V + 5%)
#
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
5
ALE Low to Valid Instr. In
@12 MHz
@16 MHz
tALLVI
4tCLK –150
4tCLK–90
ns
6
ALE Low to PSEN Low
tALLPSL
tCLK –25
ns
7
PSEN Pulse Width
tPSPW
3tCLK –35
ns
8
PSEN Low to Valid Instr. In
@12 MHz
@16 MHz
tPSLVI
3tCLK –150
3tCLK –90
ns
ns
9
Input Instr. Hold after PSEN Going High
tPSIV
0
ns
10
Input Instr. Float after PSEN Going High
tPSIX
tCLK –20
ns
11
Address Hold after PSEN Going High
tPSAV
tCLK –8
ns
12
Address Valid to Valid Instr. In @12 MHz
@16 MHz
tAVVI
5tCLK –150
5tCLK –90
ns
ns
13
PSEN Low to Address Float
tPSLAZ
0
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
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
8CLK –150
8tCLK –90
ns
ns
20
Valid Addr. to Valid Data In
@12 MHz
@16 MHz
tAVDV
9tCLK –165
9tCLK –105
ns
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
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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