DS1321 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
MFG CO.
DS1321 Datasheet PDF : 13 Pages
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Input Leakage
Output Leakage
Battery Monitoring Test Load
DS1321
IIL
-1.0
+1.0
µA
ILO
-1.0
+1.0
µA
RINT
0.8
1.2
1.5
MΩ
DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCCI < VBAT; VCCI < VCCTP)
PARAMETER
SYMBOL MIN TYP MAX UNITS NOTES
Battery Current
IBAT
100
nA
3
Battery Backup Current
ICCO3
500
µA
7
Supply Voltage
VCCO
VBAT-0.2
V
2
CEO Output
VOHL
VBAT-0.2
V
2, 9
CAPACITANCE
PARAMETER
Input Capacitance
( CEI *, TOL, MODE)
Output Capacitance
( CEO *, BW , RST )
SYMBOL MIN
CIN
COUT
TYP
MAX
7
7
(TA = +25°C)
UNITS NOTES
pF
pF
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
CEI to CEO Propagation Delay
tPD
CE Pulse Width
tCE
VCC Valid to End of
tREC
Write Protection
VCC Valid to CEI Inactive
tPU
VCC Valid to RST Inactive
tRPU
VCC Valid to BW Valid
tBPU
MIN
150
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
VCC Slew Rate
tF
150
VCC Fail Detect to RST Active
tRPD
VCC Slew Rate
tR
15
(-40°C to +85°C; VCCI ≥ VCCTP)
TYP MAX UNITS NOTES
12
20
ns
1.5
µs
12
125
ms
10
2
ms
200
350
ms
11
1
s
11
(-40°C to +85°C; VCCI < VCCTP)
TYP MAX UNITS NOTES
µs
15
µs
11
µs
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Battery Test to BW Active
tBW
Battery Test Cycle-Normal
tBTCN
Battery Test Cycle-Warning
Battery Test Pulse Width
tBTCW
tBTPW
Battery Detach to Battery Attach
tBDBA
Battery Attach to BW Inactive
tBABW
MIN
7
(-40°C to +85°C; VCCI ≥ VCCTP)
TYP MAX UNITS NOTES
1
s
11
24
hr
5
s
1
s
s
1
s
11
7 of 13
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