DS1391(2004) 查看數據表（PDF） - Maxim Integrated
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DS1391 Datasheet PDF : 24 Pages
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Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
RECOMMENDED DC OPERATING CONDITIONS (continued)
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and TA = +25°C,
unless otherwise noted.) (Note 1)
PARAMETER
VCC Standby Current
(Note 11)
VBACKUP Leakage Current
(VBACKUP = 3.7V,
VCC = VCC(MAX))
SYMBOL
-33
ICCS
-3
-18
IBACKUPLKG
CONDITIONS
MIN TYP MAX UNITS
115
175
80
125
µA
60
100
15
100
nA
DC ELECTRICAL CHARACTERISTICS
(VCC = 0V, VBACKUP = 3.7V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
VBACKUP Current OSC On,
SQW Off
SYMBOL
IBACKUP1 (Note 12)
CONDITIONS
VBACKUP Current OSC On,
SQW On (32kHz)
IBACKUP2 (Note 12)
VBACKUP Current OSC On,
SQW On, VBACKUP = 3.0V,
TA = +25°C
IBACKUP3 (Note 12)
VBACKUP Current, OSC Off
(Data Retention)
IBACKUPDR (Note 12)
MIN TYP MAX UNITS
500 1000
nA
600 1150
nA
600 1000
nA
25
100
nA
AC ELECTRICAL CHARACTERISTICS—SPI INTERFACE
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SCLK Frequency (Note 13)
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Valid
(Notes 13, 14, 15)
SCLK Low Time (Note 13)
SCLK High Time (Note 13)
SCLK Rise and Fall
CS to SCLK Setup (Note 13)
SCLK to CS Hold (Note 13)
CS Inactive Time (Note 13)
CS to Output High Impedance
SYMBOL
fSCLK
tDC
tCDH
tCDD
tCL
tCH
tR, tF
tCC
tCCH
tCWH
tCDZ
CONDITION
2.7V ≤ VCC ≤ 5.5V
1.71V ≤ VCC ≤ 1.89V
(Notes 13, 14)
(Notes 13, 14)
2.7V ≤ VCC ≤ 5.5V
1.71V ≤ VCC ≤ 1.89V
2.7V ≤ VCC ≤. 5.5V
1.71V ≤ VCC ≤ 1.89V
2.7V ≤ VCC ≤ 5.5V
1.71V ≤ VCC ≤ 1.89V
2.7V ≤ VCC ≤. 5.5V
1.71V ≤ VCC ≤ 1.89V
(Notes 13, 14)
MIN TYP MAX UNITS
4
MHz
1
30
ns
30
ns
80
ns
160
110
ns
400
110
ns
400
200
ns
400
ns
100
ns
400
ns
500
40
ns
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