27128

M27128A NMOS 128K (16K x 8) UV EPROM FAST ACCESS TIME: 200ns EXTENDED TEMPERATURE RANGE SINGLE 5 V 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 M27128A is a 131,072 bit UV erasable and electrically programmable memory EPROM. It is organized as 16,384 words by 8 bits. The M27128A 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 14 A0-A13 8 Q0-Q7 Table 1. Signal Names A0 - A13 Q0 - Q7 E G P VPP VCC VSS Address Inputs Data Outputs Chip Enable Output Enable Program Program Supply Supply Voltage Ground P E G M27128A VSS AI00769B March 1995 1/10 M27128A 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 A9 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 de...