27C64

M27C64A 64 Kbit (8Kb x 8) UV EPROM and OTP EPROM 5V ± 10% SUPPLY VOLTAGE in READ OPERATION FAST ACCESS TIME: 150ns LOW POWER “CMOS” CONSUMPTION: – Active Current 30mA – Standby Current 100µA PROGRAMMING VOLTAGE: 12.5V ± 0.25V HIGH SPEED PROGRAMMING (less than 1 minute) ELECTRONIC SIGNATURE – Manufacturer Code: 9Bh – Device Code: 08h DESCRIPTION The M27C64A is a 64Kbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor systems requiring large programs and is organized as 8,192 by 8 bits. The FDIP28W (window ceramic frit-seal package) has transparent lid which 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. For applications where the content is programmed only on time and erasure is not required, the M27C64A is offered in PLCC32 package. 28 1 PLCC32 (C) FDIP28W (F) Figure 1. Logic Diagram VCC VPP 13 A0-A12 8 Q0-Q7 Table 1. Signal Names A0-A12 Q0-Q7 E G P VPP VCC VSS March 1998 Address Inputs Data Outputs Chip Enable Output Enable P E G M27C64A VSS Program Program Supply Supply Voltage Ground 1/12 AI00834B M27C64A Figure 2A. DIP Pin Connections Figure 2B. LCC Pin Connections AI00835 VSS DU Q3 Q4 Q5 AI00836 VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 VSS 1 28 2 27 3 26 4 25 5 24 6 23 7 22 M27C64A 21 8 20 9 19 10 18 11 17 12 16 13 15 14 VCC P NC A8 A9 A11 G A10 E Q7 Q6...