DS2250T Maxim Integrated Products, Inc., DS2250T Datasheet - Page 9

• Manufacturer Part Number: DS2250T
• Description: Soft Microcontroller Module
• Manufacturer: Maxim Integrated Products, Inc.

AC CHARACTERISTICS—EXPANDED BUS MODE TIMING SPECIFICATIONS
(V
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
#
1
2
3
4
5
6
7
8
9
CC
= 5V ±5%, T
PARAMETER
Oscillator Frequency
ALE Pulse Width
Address Valid to ALE Low
Address Hold After ALE Low
ALE Low to Valid Instr. In
ALE Low to
Input Instr. Hold after
Input Instr. Float after
Address Hold after
Address Valid to Valid Instr. In @ 12 MHz
Data Hold after
Data Float after
ALE Low to Valid Data In
Valid Addr. to Valid Data In
ALE Low to
Address Valid to
Data Valid to
Data Valid to
Data Valid after
PSEN
PSEN
PSEN
RD
WR
RD
RD
RD
Pulse Width
Low to Valid Data In
Low to Address Float
or
Pulse Width
Pulse Width
Low to Valid Instr. In
Low to Address Float
WR
High to ALE High
PSEN
RD
WR
WR
A
RD
RD
WR
or
= 0°C to +70°C.)
RD
Going Low
High
Low
PSEN
High
High
WR
High
or
PSEN
PSEN
WR
Low
Going High
Going High
Going High
Low
@ 12 MHz
@ 16 MHz
@ 12 MHz
@ 16 MHz
@ 16 MHz
@ 12 MHz
@ 16 MHz
@ 12 MHz
@ 16 MHz
@ 12 MHz
@ 16 MHz
@ 12 MHz
@ 16 MHz
9 of 18
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RDHALH
1/t
t
t
ALLRDL
t
t
t
DVWRH
WRHDV
t
AVAAV
ALLPSL
t
RDHDV
DVWRL
t
RDLDV
RDHDZ
AVRDL
AVALL
t
t
ALLVD
RDLAZ
ALLVI
t
t
PSLAZ
WRPW
RDPW
AVDV
ALPW
PSLVI
PSPW
PSAV
AVVI
PSIV
PSIX
CLK
6t
6t
4t
7t
2t
3t
3t
7t
t
t
t
t
t
t
CLK
CLK
CLK
t
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
MIN
1.0
0
0
0
-40
-35
-25
-100
-100
-130
-60
-150
-50
-40
-40
-35
-8
-50
-90
4t
3t
5t
5t
5t
9t
9t
8
3t
4t
3t
5t
2t
8t
t
16 (-16)
t
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
MAX
CLK
CLK
CLK
CLK
CLK
CLK
0
-150
+50
-150
-150
-20
-150
-165
-105
-165
-105
+50
-90
-90
-90
-70
-90
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns