M27256 Datasheet, PDF (1/10 Pages) STMicroelectronics – NMOS 256K 32K x 8 UV EPROM

M27256
NMOS 256 Kbit (32Kb x 8) UV EPROM
NOT FOR NEW DESIGN
s FAST ACCESS TIME: 170ns
s EXTENDED TEMPERATURE RANGE
s SINGLE 5V SUPPLY VOLTAGE
s LOW STANDBY CURRENT: 40mA max
s TTL COMPATIBLE DURING READ and
PROGRAM
s FAST PROGRAMMING ALGORITHM
s ELECTRONIC SIGNATURE
s PROGRAMMING VOLTAGE: 12V
DESCRIPTION
The M27256 is a 262,144 bit UV erasable and
electrically programmable memory EPROM. It is
organized as 32.768 words by 8 bits.
The M27256 is housed in a 28 pin Window Ceram-
ic Frit-Seal Dual-in-Line package. The transparent
lid allows the user to expose the chip to ultraviolet
light to erase the bit pattern. A new pattern can
then be written to the device by following the pro-
gramming procedure.
28
1
FDIP28W (F)
Figure 1. Logic Diagram
VCC VPP
15
A0-A14
8
Q0-Q7
E
M27256
G
VSS
AI00767B
November 2000
This is information on a product still in production but not recommended for new designs.
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