DS1386/DS1386P
RAMified Watchdog Timekeeper
www.maxim-ic.com
FEATURES
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8 or 32 kbytes of user NV RAM
Integrated NV SRAM, real time clock,
crystal, power-fail control circuit and lithium
energy source
Totally nonvolatile with over 10 years of
operation in the absence of power
Watchdog timer restarts an out-of-control
processor
Alarm function schedules real-time related
activities such as system wakeup
Programmable interrupts and square wave
output
All registers are individually addressable via
the address and data bus
Interrupt signals are active in power-down
mode
INTA
INTB
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN ASSIGNMENT
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V
CC
SQW
V
CC
WE
NC
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
INTA
INTB
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V
CC
SQW
V
CC
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DS1386 8k x 8
32-Pin Encapsulated Package
DS1386 32k x 8
32-Pin Encapsulated Package
INTB (INTB)
NC
NC
PFO
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
X1
GND V
BAT
X2
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
INTA
SQW
NC
NC
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
INTB (INTB)
NC
NC
PFO
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
X1
GND V
BAT
X2
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
INTA
SQW
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
DS1386 8k x 8
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
DS1386 32k x 8
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
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