DS1557P 查看數據表（PDF） - Maxim Integrated

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DS1557P

4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM

Maxim Integrated 

DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM

DC ELECTRICAL CHARACTERISTICS

(VCC = 3.3V ±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 TYP MAX UNITS

20 30

mA

2

6

mA

1

4

mA

-1

+1

A

-1

+1

A

2.4

V

0.4

V

0.4

V

2.75

2.97

V

VBAT

or

V

VPF

Figure 5. Read Cycle Timing Diagram

11 of 17

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