ds2251 Maxim Integrated Products, Inc., ds2251 Datasheet - Page 10

• Manufacturer Part Number: ds2251
• Description: 128k Soft Microcontroller Module
• Manufacturer: Maxim Integrated Products, Inc.

AC CHARACTERISTICS: EXPANDED
BUS MODE TIMING SPECIFICATIONS
PARAMETER
Pin Capacitance
Reset Trip Point in Stop Mode
w/BAT=3.0V
w/BAT=3.3V
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
#
1
2
3
4
5
6
7
8
9
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
PSEN
PSEN
PSEN
RD
WR
RD
Pulse Width
Low to Valid Data In
Pulse Width
Pulse Width
Low to Valid Instr. In
Low to Address Float
PSEN
RD
WR
WR
RD
RD
or
RD
Going Low
High
Low
PSEN
High
High
WR
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
SYMBOL
C
IN
10 of 20
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
1/t
t
t
t
ALLRDL
t
t
t
DVWRH
AVAAV
ALLPSL
t
RDHDV
DVWRL
AVALL
t
t
RDLDV
RDHDZ
ALLVD
AVRDL
t
WRPW
ALLVI
t
t
PSLAZ
ALPW
RDPW
AVDV
PSLVI
PSPW
PSAV
AVVI
PSIV
PSIX
MIN
CLK
4.0
4.4
(t
A
TYP
=0˚C to70˚C; V
6t
6t
4t
7t
2t
3t
3t
t
t
t
t
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
-40
-35
-8
-50
MAX
4.25
4.65
10
4t
3t
5t
5t
5t
9t
9t
8
3t
4t
3t
5t
2t
8t
16 (-16)
t
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
MAX
CLK
UNITS
CLK
CLK
CLK
CLK
CLK
CC
pF
V
-150
-150
-150
-20
-150
-165
-105
-165
-105
+50
-90
-90
-90
-70
-90
=5V
NOTES
UNITS
DS2251T
MHz
10%)
5
1
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