M27V101 Datasheet | STMicroelectronics

The M27V101 is a low voltage 1 Mbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor systems requiring large data or program storage and is organized as 131,072 by 8 bits. The M27V101 operates in the read mode with a supply voltage as low as 3V. The decrease in operating power allows either a reduction of the size of the battery or an increase in the time between battery recharges. The FDIP32W (window ceramic frit-seal package) has a transparent lid which allow the user to expose the chip to ultraviolet light to erase the bit pattern. Table 1. Signal Names A0-A16 Q0-Q7 E G P VPP VCC VSS Address Inputs Data Outputs Chip Enable Output Enable Program Program Supply Supply Voltage Ground PLCC32 (K) TSOP32 (N) 8 x 20 mm Figure 1. Logic Diagram 17 A0-A16 8 Q0-Q7 AI00660B May 1998 1/15 Figure 2A. DIP Pin Connections Figure 2B. LCC Pin Connections VPP A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 VSS 1 32 2 31 3 30 4 29 5 28 6 27 7 26 8 25 M27V101 9 24 10 23 11 22 12 21 13 20 14 19 15 18 16 17 AI01906 VCC P NC A14 A13 A8 A9 A11 G A10 E Q7 Q6 Q5 Q4 Q3 A7 A6 A5 A4 A3 A2 A1 A0 Q0 A12 A15 A16 VPP VCC P NC 1 32 A14 A13 A8 A9 A11 G A10 E Q7 9 M27V101 25 17 VSS Q3 Q4 Q5 Q6 AI00661 Warning : NC = Not Connected. Warning: NC = Not Connected. Figure 2C. TSOP Pin Connections A11 A9 A8 A13 A14 NC P VCC VPP A16 A15 A12 A7 A6 A5 A4 8 9 M27V101 (Normal) 25 24 AI01152B G A10 E Q7 Q6 Q5 Q4 Q3 VSS Q2 Q1 Q0 A0 A1 A2 A3 A new pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only one time and erasure is not required, the M27V101 is offered in both PDIP32, PLCC32 and TSOP32 (8 x 20 mm) packages. DEVICE OPERATION The operating modes of the M27V101 are listed in the Operating Modes table. A single power supply is required in the read mode. All inputs are TTL...