STMicroelectronics M27256
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.| Part No. | M27256 |
|---|---|
| Datasheet | M27256 Download |
| Manufacturer |  STMicroelectronics |
| Description | NMOS 256K 32K x 8 UV EPROM |
| Buy | Stock & Price |
DESCRIPTION
It is organized as 32.768 words by 8 bits. 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 E M27256 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 G VSS AI00767B March 1995 1/10 M27256 Table 2.ABSOLUTE MAXIMUM RATINGS
Symbol TA TBIAS TSTG VIO VCC VA9 VPP Parameter Ambient Operating Temperature Temperature Under Bias Storage Temperature Input or Output Voltages Supply Voltage VA9 Voltage Program Supply grade 1 grade 6 grade 1 grade 6 Value 0 to 70 –40 to 85 –10 to 80 –50 to 95 –65 to 125 –0.6 to 6.25 –0.6 to 6.25 –0.6 to 13.5 –0.6 to 14 Unit °C °C °C V V V V Note: Except for the rating "Operating Temperature Range", stresses above those listed in the Table "ABSOLUTE MAXIMUM RATINGS
" may cause permanent damage to the device.
