HT23C512-250-28DIP中文资料

HT23C512

CMOS 64K ´8-Bit Mask ROM

Block Diagram

Rev.1.101August 30,2002

Features

·Operating voltage:2.7V~5.5V ·Low power consumption

-Operation:25mA max.(V CC =5V)

10mA max.(V CC =3V)

-Standby:30m A max.(V CC =5V)

10m A max.(V CC =3V)

·Access time:150ns max.(V CC =5V)

250ns max.(V CC =3V)

·65536´8-bit of mask ROM

·Mask options:chip enable CE/CE/OE1/OE1and

output enable OE/OE/NC

·TTL compatible inputs and outputs ·Tristate outputs ·Fully static operation ·28-pin DIP/SOP package

General Description

The HT23C512is a read-only memory with high perfor-mance CMOS storage device whose 512K of memory is arranged into 65536words by 8bits.

For application flexibility,the chip enable and output en-able control pins can be selected as active high or active low.This flexibility not only allows easy interface with most microprocessors,but also eliminates bus conten-tion in multiple bus microprocessor systems.An addi-tional feature of the HT23C512is its ability to enter the standby mode whenever the chip enable (CE/CE)is in-active,thus reducing current consumption to below 30m A.The combination of these functions makes the chip suitable for high density low power memory appli-cations.

Pin Assignment

Pin Description

Pin Name I/O Description

A0~A15I Address inputs

D0~D7O Data outputs

CE/CE/OE1/OE1I Chip enable/Output enable input

OE/OE/NC I Output enable input

VSS¾Negative power supply,ground

VCC¾Positive power supply

Absolute Maximum Ratings

Supply Voltage............................................-0.3V to6V Storage Temperature............................-50°C to125°C Input Voltage....................................-0.3V to V CC+0.3V Operating Temperature...........................-40°C to85°C

Note:These are stress ratings only.Stresses exceeding the range specified under²Absolute Maximum Ratings²may 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 exposure to extreme conditions may affect device reliabil-ity.

D.C.Characteristics

Supply voltage:2.7V~3.6V Ta=-40°C to85°C

Symbol Parameter

Test Conditions

Min.Typ.Max.Unit V CC Conditions

V CC Operating Voltage¾¾ 2.7¾ 3.6V

I CC Operating Current3V O/P Unload,f=5MHz¾¾10mA

V IL Input Low Voltage3V¾V SS¾0.4V V IH Input High Voltage3V¾ 2.0¾V CC V

V OL Output Low Voltage3V I OL=2.1mA¾¾0.4V V OH Output High Voltage3V I OH=-0.4mA 2.4¾V CC V

Rev.1.102August30,2002