DS1557P 查看數據表（PDF） - Maxim Integrated
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DS1557P Datasheet PDF : 17 Pages
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DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground………………………………………………………………-0.3V to +6.0V
Storage Temperature Range…………...………………………………………………………….....……..-55°C to +125°C
Lead Temperature (soldering, 10s).....................................................................................................…………+260°C
Soldering Temperature (reflow)………………………………………………………………………………………. +260°C
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.
OPERATING RANGE
RANGE
Commercial
Industrial
TEMP RANGE
0°C to +70°C
-40°C to +85°C
VCC
3.3V 10% or 5V 10%
3.3V 10% or 5V 10%
RECOMMENDED DC OPERATING CONDITIONS
(TA = Over the Operating Range)
PARAMETER
SYMBOL CONDITIONS MIN TYP
Logic 1 Voltage All Inputs
(Note 1)
VIH
VCC = 5V 10%
2.2
VIH
VCC = 3.3V 10%
2.0
Logic 0 Voltage All Inputs
(Note 1)
VIL
VCC = 5V 10%
-0.3
VIL
VCC = 3.3V 10% -0.3
MAX
VCC +
0.3V
VCC +
0.3V
+0.8
+0.6
UNITS
V
V
DC ELECTRICAL CHARACTERISTICS
(VCC = 5.0V ±10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL CONDITIONS
Active Supply Current
TTL Standby Current
(CE = VIH)
CMOS Standby Current
(CE VCC - 0.2V)
Input Leakage Current
(Any Input)
Output Leakage Current
(Any Output)
Output Logic 1 Voltage
(IOUT = -1.0 mA)
Output Logic 0 Voltage
ICC
ICC1
ICC2
IIL
IOL
VOH
VOL1
VOL2
(Notes 2, 3, 11)
(Notes 2, 3)
(Notes 2, 3)
(Note 1)
IOUT = 2.1 mA,
DQ0–7 Outputs
(Note 1)
IOUT = 7.0 mA,
IRQ/FT, and RST
Outputs
(Notes 1, 5)
Write Protection Voltage
VPF
(Note 1)
Battery Switchover Voltage
VSO
(Notes 1, 4)
MIN
-1
-1
2.4
4.20
TYP
45
3
2
MAX
90
6
UNITS
mA
mA
6
mA
+1
A
+1
A
V
0.4
V
0.4
V
4.50
V
VBAT
V
10 of 17
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