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DS1321 Datasheet(PDF) 7 Page - Dallas Semiconductor

Part # DS1321
Description  Flexible Nonvolatile Controller with Lithium Battery Monitor
PDF  12 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1321 Datasheet(HTML) 7 Page - Dallas Semiconductor

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DS1321
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CAPACITANCE
(tA =25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Input Capacitance
( CEI *, TOL, MODE)
CIN
7
pF
Output Capacitance
( CEO *, BW , RST )
COUT
7
pF
AC ELECTRICAL CHARACTERISTICS
(-40°C to +85°C; VCCI
³ VCCTP)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
CEI
to CEO Propagation Delay
tPD
12
20
ns
CE
Pulse Width
tCE
1.5
µs
11
VCC Valid to End of
Write Protection
tREC
125
ms
9
VCC Valid to CEI Inactive
tPU
2
ms
VCC Valid to RST Inactive
tRPU
150
200
350
ms
10
VCC Valid to BW Valid
tBPU
1
s
10
AC ELECTRICAL CHARACTERISTICS
(-40°C to +85°C; VCCI < VCCTP)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
VCC Slew Rate
tF
150
µs
VCC Fail Detect to RST Active
tRPD
15
µs
10
VCC Slew Rate
tR
15
µs
AC ELECTRICAL CHARACTERISTICS
(-40°C to +85°C; VCCI
³ VCCTP)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Battery Test to BW Active
tBW
1
s
10
Battery Test Cycle-Normal
tBTCN
24
hr
Battery Test Cycle-Warning
tBTCW
5
s
Battery Test Pulse Width
tBTPW
1
s
Battery Detach to Battery Attach
tBDBA
7
s
Battery Attach to BW Inactive
tBABW
1
s
10



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