UPD43257B datasheet(7/20 Pages) NEC

Part #	UPD43257B

Description	256K-BIT CMOS STATIC RAM 32K-WORD BY 8-BIT

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Manufacturer	NEC [NEC]

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Data Sheet M10693EJ7V0DS00

7

µµµµPD43257B

DC Characteristics (Recommended Operating Conditions Unless Otherwise Noted)

Parameter

Symbol

Test condition

µPD43257B-xxL

µPD43257B-xxLL

Unit

MIN.

TYP.

MAX.

MIN.

TYP.

MAX.

Input leakage

ILI

VIN = 0 V to VCC

–1.0

+1.0

–1.0

+1.0

µA

current

I/O leakage

ILO

VI/O = 0 V to VCC, /CE1 = VIH or

–1.0

+1.0

–1.0

+1.0

µA

current

CE2 = VIL or /WE = VIL

Operating

ICCA1

/CE1 = VIL, CE2 = VIH,

µPD43257B-70

45

mA

supply current

Minimum cycle time, II/O = 0 mA

µPD43257B-85

45

ICCA2

/CE1 = VIL, CE2 = VIH, II/O = 0 mA

10

ICCA3

/CE1

≤ 0.2 V, CE2 ≥ VCC – 0.2 V, Cycle = 1 MHz,

10

II/O = 0 mA, VIL

≤ 0.2 V, VIH ≥ VCC – 0.2 V

Standby

ISB

/CE1 = VIH or CE2 = VIL,3

3

mA

supply current

ISB1

/CE1

≥ VCC − 0.2 V, CE2 ≥ VCC − 0.2 V

1.0

50

0.5

15

µA

ISB2

CE2

≤ 0.2 V

1.0

50

0.5

15

High level

VOH1

IOH = –1.0 mA

2.4

V

output voltage

VOH2

IOH = –0.1 mA

VCC–0.5

Low level

VOL

IOL = 2.1 mA

0.4

V

output voltage

Remarks 1. VIN : Input voltage

VI/O : Input / Output voltage

2. These DC characteristics are in common regardless of package types and access time.

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