DS1321 Datasheet, PDF (7/12 Pages) Dallas Semiconductor – Flexible Nonvolatile Controller with Lithium Battery Monitor

CAPACITANCE
PARAMETER
Input Capacitance
( CEI *, TOL, MODE)
Output Capacitance
( CEO *, BW , RST )
SYMBOL MIN
C_IN
C_OUT
AC ELECTRICAL CHARACTERISTICS
PARAMETER
CEI to CEO Propagation Delay
CE Pulse Width
V_CC Valid to End of
Write Protection
V_CC Valid to CEI Inactive
V_CC Valid to RST Inactive
V_CC Valid to BW Valid
SYMBOL
t_PD
t_CE
t_REC
t_PU
t_RPU
t_BPU
MIN
150
AC ELECTRICAL CHARACTERISTICS
PARAMETER
V_CC Slew Rate
V_CC Fail Detect to RST Active
V_CC Slew Rate
SYMBOL
t_F
t_RPD
t_R
MIN
150
15
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Battery Test to BW Active
Battery Test Cycle-Normal
Battery Test Cycle-Warning
Battery Test Pulse Width
Battery Detach to Battery Attach
Battery Attach to BW Inactive
SYMBOL
t_BW
t_BTCN
t_BTCW
t_BTPW
t_BDBA
t_BABW
MIN
7
TYP
MAX
7
7
DS1321
(t_A =25°C)
UNITS NOTES
pF
pF
(-40°C to +85°C; V_CCI ≥ V_CCTP)
TYP
12
MAX UNITS NOTES
20
ns
1.5
µs
11
125
ms
9
2
ms
200
350
ms
10
1
s
10
(-40°C to +85°C; V_CCI < V_CCTP)
TYP
MAX UNITS NOTES
µs
15
µs
10
µs
(-40°C to +85°C; V_CCI ≥ V_CCTP)
TYP
MAX UNITS NOTES
1
s
10
24
hr
5
s
1
s
s
1
s
10
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