DESCRIPTION
The TC57256AD is a 32,768 word x 8 bit CMOS
ultraviolet light erasable and electrically programmable
read only memory. For read operation, the TC
57256AD's access time is 150ns, and the TC57256AD
operates from a single 5-volt power supply and has
low power standby mode which reduces the power
dissipation without increasing access time. The
standby mode is achieved by applying a TTL-high
level signal to the CE input. Advanced CMOS techn-
nology reduces the maximum active current to 30
mA/6.7MHz and standby current to 100μA
For program operation, the programming is achieved
by using the high speed programming mode.
TC57256AD is fabricated with the CMOS technology
and the N-channel silicon double layer gate MOS
technology.

FEATURES
• Peripheral circuit: CMOS
Memory cell
:N-MOS
• Low power dissipation
30mA/6.7MHZ (atcive)
(standby)
100μA
• Fast access time TC57256AD-15
150ns
TC57256AD-20 200ns
Single 5V power supply
• Full static operation
High speed programming mode
Inputs and outputs TTL compatible
Pin compatible with ROM TC53257P and
TMM23256P EPROM 27256
Standard 28 pin DIP cerdip Package