HT23C040 Datasheet, PDF (1/10 Pages) Holtek Semiconductor Inc – CMOS 512Kx8-Bit Mask ROM

HT23C040
CMOS 512K´8-Bit Mask ROM
Features
· Operating voltage: 2.7V~5.5V
· Low power consumption
– _{Operation: 25mA max. (VCC=5V)}
10mA max. (V_CC=3V)
– _{Standby: 30mA max. (VCC=5V)}
10mA max. (V_CC=3V)
· Access time: 120ns max. (V_CC=5V)
250ns max. (V_CC=3V)
General Description
The HT23C040 is a read-only memory with
high performance CMOS storage device whose
4096K of memory is arranged into 524288 word
by 8 bits.
For application flexibility, the chip enable and
output enable control pins can be selected as ac-
tive high or active low. This flexibility not only
allows easy interface with most microproces-
sors, but also eliminates bus contention in mul-
· 524288´8-bit of mask ROM
· Mask option: chip enable CE/CE/OE1/OE1,
and output enable OE/OE/NC
· TTL compatible inputs and outputs
· Tristate outputs
· Fully static operation
· Package type: 32-pin DIP/SOP
tiple bus microprocessor systems. An
additional feature of the HT23C040 is its abil-
ity to enter the standby mode whenever the
chip enable (CE/CE) is inactive, thus reducing
current consumption to below 30mA. The combi-
nation of these functions makes the chip suit-
able for high density low power memory
applications.
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January 20, 2000