HT23C512 Datasheet, PDF (1/8 Pages) Holtek Semiconductor Inc – CMOS 64Kx 8-Bit Mask ROM

HT23C512
CMOS 64K×8-Bit Mask ROM
Features
• _{Operating voltage: 2.7V~5.5V}
• _{Low power consumption}
– _{Operation: 25mA Max. (VCC=5V)}
10mA Max. (VCC=3V)
– _{Standby: 30µA Max. (VCC=5V)}
10µA Max. (VCC=3V)
• _{Access time:150ns Max. (VCC=5V)}
250ns Max. (VCC=3V)
• _{65536×8 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 HT23C512 is a read-only memory with high
performance CMOS storage device whose 512K
of memory is arranged into 65536 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 microproces-
sors, but also eliminates bus contention in mul-
tiple bus microprocessor systems. An additional
feature of the HT23C512 is its ability to enter
the standby mode whenever the chip enable
(CE/CE) is inactive, thus reducing current con-
sumption to below 30µA. The combination of
these functions makes the chip suitable for high
density low power memory applications.
Block Diagram
1
24th Aug ’98