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M27256-20F6 데이터시트(PDF) 1 Page - STMicroelectronics |
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M27256-20F6 데이터시트(HTML) 1 Page - STMicroelectronics |
1 / 10 page 1/10 NOT FOR NEW DESIGN November 2000 This is information on a product still in production but not recommended for new designs. M27256 NMOS 256 Kbit (32Kb x 8) UV EPROM 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. Figure 1. Logic Diagram AI00767B 15 A0-A14 Q0-Q7 VPP VCC M27256 G E VSS 8 1 28 FDIP28W (F) |
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