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23C256

Description
CMOS 32Kx 8-Bit Mask ROM
File Size159KB,8 Pages
ManufacturerHoltek
Websitehttp://www.holtek.com/
Download Datasheet View All

23C256 Overview

CMOS 32Kx 8-Bit Mask ROM

HT23C256
CMOS 32K
×
8-Bit Mask ROM
Features
Operating voltage 2.7V~5.5V
Low power consumption
Operation: 25mA max. (V
CC
=5V)
10mA max. (V
CC
=3V)
Standby: 30
µ
A max. (V
CC
=5V)
10
µ
A max. (V
CC
=3V)
Access time:150ns max. (V
CC
=5V)
250ns max. (V
CC
=3V)
32768
×
8 bits of mask ROM
Mask options: chip enable CE/CE/OE1/OE1 and
output enable OE/OE/NC
TTL compatible inputs and outputs
Tristate outputs
Fully static operation
Package type: 28-pin DIP/SOP
General Description
The HT23C256 is a read-only memory with
high performance CMOS storage device whose
256K of memory is arranged into 32768 words
by 8 bits.
For application flexibility, the chip enable and
output enable control pins can be selected as
active high or active low. This flexibility not
only allows easy interface with most microproc-
essors, but also eliminates bus contention in
multiple bus microprocessor systems. An addi-
tional feature of the HT23C256 is its ability to
enter the standby mode whenever the chip en-
able (CE/CE) is inactive, thus reducing current
consumption to below 30
µ
A. The combination of
these functions makes the chip suitable for high
density low power memory applications.
Block Diagram
1
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