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STMicroelectronics - NMOS 256K 32K x 8 UV EPROM

Numéro de référence M27256
Description NMOS 256K 32K x 8 UV EPROM
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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M27256 fiche technique
M27256
NMOS 256K (32K x 8) UV EPROM
FAST ACCESS TIME: 170ns
EXTENDED TEMPERATURE RANGE
SINGLE 5V SUPPLY VOLTAGE
LOW STANDBY CURRENT: 40mA max
TTL COMPATIBLE DURING READ and
PROGRAM
FAST PROGRAMMING ALGORITHM
ELECTRONIC SIGNATURE
PROGRAMMING VOLTAGE: 12V
28
1
FDIP28W (F)
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 Ceramic
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 programming
procedure.
Figure 1. Logic Diagram
VCC VPP
15
A0-A14
8
Q0-Q7
Table 1. Signal Names
A0 - A14
Q0 - Q7
E
G
VPP
VCC
VSS
Address Inputs
Data Outputs
Chip Enable
Output Enable
Program Supply
Supply Voltage
Ground
E M27256
G
VSS
AI00767B
March 1995
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