HT23C040 データシートの表示（PDF） - Holtek Semiconductor

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HT23C040

CMOS 512Kx
8-Bit Mask ROM

Holtek Semiconductor 

HT23C040

Pin Description

Pin Name

I/O

Description

NC

¾ No connection

A0~A18

I Address inputs

D0~D7

O Data outputs

VSS

¾ Negative power supply

CE/CE/OE1/OE1 I Chip enable/Output enable input

OE/OE/NC

I Output enable input

VCC

¾ Positive power supply

Operation Truth Table

Mode

Read

Deselect

Standby

CE/CE

H/L

H/L

L/H

OE/OE

H/L

L/H

X

A0~A18

Valid

X

X

D0~D7

Data Out

High Z

High Z

Note: H=VIH, L=VIL, X=VIH or VIL

Absolute Maximum Ratings

Supply Voltage.................................-0.3V to 6V

Input Voltage .......................-0.3V to VCC+0.3V

Storage Temperature.................-50°C to 125°C

Operating Temperature ..............-40°C to 85°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-

mum Ratings² may cause substantial damage to the device. Functional operation of this device

at other conditions beyond those listed in the specification is not implied and prolonged expo-

sure to extreme conditions may affect device reliability.

3

January 20, 2000

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