UPD4992GS-E2 datasheet(3/16 Pages) NEC

Part #	UPD4992GS-E2

Description	8-Bit Parallel I/O Calendar Clock

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Manufacturer	NEC [NEC]

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µPD4992

3

ABSOLUTE MAXIMUM RATINGS (VSS = 0 V)

Item

Symbol

Ratings

Unit

Supply voltage

VDD

–0.3 to 7.0

V

Input voltage range

VIN

–0.3 to VDD + 0.3

V

Output pin withstand voltage

VOUT

7.0

V

Low level output current

IOUT

30

mA

(N ch Open Drain)

Operating temperature range

Topt

–40 to +85

°C

Storage temperature range

Tstg

–65 to +125

°C

ELECTRICAL CHARACTERISTICS

(VSS = 0 V, f = 32.768 kHz, CG = CD = 20 pF, Ci = 20k ohms, Ta = –40 to +85

°C)

Item

Symbol

Condition

MIN.

TYP.*

MAX.

Unit

Operating voltage range

VDD

2.4

5.5

V

High level input voltage

VIH

0.7 VDD

VDD

V

Low level input voltage

VIL

VSS

0.3 VDD

V

Supply current

IDD

VDD = 5.5 V, VIN = VSS

26

µA

Supply current

IDD

VDD = 2.4 V, VIN = VSS

0.6

2

µA

Input leakage current

ILI

VDD = 5.5 V, VIN = VDD or VSS

±1 × 10–5

±1.0

µA

High level output voltage

VOH

IOH = –1.0 mA

2.4

4.3

V

Low level output voltage

VOL1

IOL = 2.0 mA

0.1

0.4

V

Low level output voltage

VOL2

IOL = 1.0 mA (N ch Open Drain)

0.4

V

High level leakage current

ILOH

TPout = VDD (N ch Open Drain)

4

× 10–5

1.0

µA

*: Ta = +25

°C

SWITCHING CHARACTERISTICS

WRITE CYCLE (unless otherwise specified VDD = 5 V

± 10 %, Ta = –40 to +85 °C)

Item

Symbol

Condition

MIN.

TYP.

MAX.

Unit

Cycle time

tWC

150

CS-WR reset time

tCW

120

Address - WR reset time

tAW

120

Address - WR set up time

tAS

0

Write pulse width

tWP

90

ns

Address hold time

tWR

20

Input data set up time

tDW

50

Input data hold time

tDH

0

WR - output floating time

tWHZ

50

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