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DS1236A Datasheet, PDF (19/20 Pages) Dallas Semiconductor – MicroManager Chip
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PARAMETER
Power Sup. Trip Point
Power Supply Trip (5% Option)
IN Input Pin Current
IN Input Trip Point
SYMBOL
VCCTP
VCCTP
ICCIN
VTP
MIN
4.25
4.50
-1.0
2.5
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
VCC Fail Detect to RST, RST
tRPD
40
VTP to NMI
tIPD
40
RESET Active Time
tRST
25
NMI Pulse Width
tNMI
200
ST Pulse Width
tST
20
PBRST @ VIL
tPB
30
VCC Slew Rate 4.75 to 4.25
tF
300
Chip Enable Propagation Delay
tPD
VCC Fail to Chip Enable High
tCF
7
VCC Valid to RST, RST (RC=1)
tFPU
VCC Valid to RST & RST
tRPU
25
VCC Slew to 4.24 to VBAT
tFB1
10
VCC Slew 4.25 to 4.75 VBAT
tFB2
100
Chip Enable Output Recovery
tREC
.1
Time
VCC Slew 4.25 to 4.75
tR
0
Chip Enable Pulse Width
tCE
Watchdog Time Delay
tTD
100
ST to WC/ SC
tWC
0.1
VBAT Detect to PF, PF
tPPF
ST to NMI
tSTN
NMI to RST & RST
tNRT
VBAT Detect to RST & RST
tARST
VCC Valid to RST, RST
tBRST
30
CAPACITANCE
PARAMETER
Input Capacitance
Output Capacitance
SYMBOL
CIN
COUT
MIN
TYP
4.37
4.62
2.54
MAX
4.50
4.75
+1.0
2.6
UNITS
V
V
µA
V
DS1236A
NOTES
1
1
1
(0°C to 70°C; VCC= 4.5V to 5.5V)
TYP MAX UNITS NOTES
100
175
µs
100
175
µs
100
150
ms
300
500
µs
14
ns
20
ms
µs
20
ns
12
44
µs
17
100
ns
100
150
ms
5
µs
7
µs
8
µs
9
µs
5
s
10
400
600
ms
50
µs
2
µs
7
30
ns
11
30
ns
200
µs
15
100
150
µs
16
(tA=25°C)
TYP MAX UNITS NOTES
5
pF
7
pF
19 of 20
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