DS17287-3 查看數據表（PDF） - Maxim Integrated
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DS17287-3 Datasheet PDF : 31 Pages
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DS17285/DS17287/
DS17485/DS17487/
DS17885/DS17887
Real-Time Clocks
DC Electrical Characteristics
(VCC = 0V, VBAT = 3.0V, TA = Over the operating range, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
VBAT or VBAUX Current
(Oscillator On); TA = +25°C,
VBAT = 3.0V
IBAT
(Note 7)
VBAT or VBAUX Current
(Oscillator Off)
IBATDR (Note 7)
TYP MAX UNITS
500 700
nA
50
400
nA
AC Electrical Characteristics
(VCC = +4.5V to +5.5V, TA = Over the operating range, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
Cycle Time
Pulse Width, RD or WR Low
Pulse Width, RD or WR High
Input Rise and Fall
Chip-Select Setup Time Before
RD or WR
tCYC
PWRWL
PWRWH
tR, tF
tCS
Chip-Select Hold Time
Read-Data Hold Time
Write-Data Hold Time
Address Setup Time to ALE Fall
Address Hold Time to ALE Fall
RD or WR High Setup to ALE
Rise
tCH
tDHR
tDHW
tASL
tAHL
tASD
Pulse Width ALE High
Delay Time ALE Low to RD Low
Output Data Delay Time from RD
Data Setup Time
IRQ Release from RD
PWASH
tASED
tDDR
tDSW
tIRD
(Note 8)
MIN TYP MAX UNITS
240
DC
ns
120
ns
80
ns
30
ns
20
ns
0
ns
10
50
ns
0
ns
20
ns
10
ns
25
ns
40
ns
30
ns
20
120
ns
30
ns
2
µs
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