DS1557 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS1557 Datasheet PDF : 19 Pages
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POWER-ON DEFAULT STATES
Upon application of power to the device, the following register bits are set to a 0:
WDS=0, BMB0-BMB4=0, RB0-RB1=0, AE=0, ABE=0.
DS1557
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
-5.0V to +6.0V
0°C to 70°C
-55°C to +125°C
260°C for 10 seconds (See Note 8)
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
PARAMETER
SYMBOL MIN TYP
Logic 1 Voltage All Inputs
VCC = 5V ±10%
VIH
2.2
VCC = 3.3V ±10%
VIH
2.0
Logic 0 Voltage All Inputs
VCC = 5V ±10%
VIL
-0.3
VCC = 3.3V ±10%
VIL
-0.3
MAX
(0°C to 70°C)
UNITS NOTES
VCC +0.3V
V
1
VCC +0.3V
V
1
0.8
1
0.6
1
DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
Active Supply Current
ICC
TTL Standby Current ( CE =VIH )
ICC1
CMOS Standby Current
ICC2
( CE ≥=VCC - 0.2V)
Input Leakage Current (any input)
IIL
-1
Output Leakage Current (any
output)
IOL
-1
Output Logic 1 Voltage
(IOUT = -1.0 mA)
VOH
2.4
Output Logic 0 Voltage
(IOUT = 2.1 mA, DQ0-7 Outputs)
VOL1
(IOUT = 10.0 mA, IRQ /FT and
VOL2
RST outputs)
Write Protection Voltage
VPF
4.25
Battery Switch Over Voltage
VSO
(0°C to 70°C; VCC = 5.0V ±=10%)
TYP MAX UNITS NOTES
X
90
mA
2, 3
X
6
mA
2, 3
X
4
mA
2, 3
+1
µA
+1
µA
V
1
0.4
V
1
0.4
V
1, 5
4.37 4.50
V
1
VBAT
V
1, 4
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