M27C1024 Datasheet | STMicroelectronics

DESCRIPTION The M27C1024 is a 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 65,536 words of 16 bits. The FDIP40W (window ceramic frit-seal package) has a 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 application where the content is programmed only one time and erasure is not required, the M27C1024 is offered in PDIP40, PLCC44 and TSOP40 (10 x 14mm) packages. Table 1. Signal Names A0-A15 Q0-Q15 E G P VPP VCC VSS Address Inputs Data Outputs Chip Enable Output Enable Program Program Supply Supply Voltage Ground PLCC44 (C) TSOP40 (N) 10 x 14mm Figure 1. Logic Diagram 16 A0-A15 16 Q0-Q15 AI00702B September 1998 1/15 Figure 2A. DIP Pin Connections VPP E Q15 Q14 Q13 Q12 Q11 Q10 Q9 Q8 VSS Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 G 1 40 2 39 3 38 4 37 5 36 6 35 7 34 8 33 9 32 10 31 M27C1024 30 11 12 29 13 28 14 27 15 26 16 25 17 24 18 23 19 22 20 21 AI00703 Figure 2B. LCC Pin Connections VCC P NC A15 A14 A13 A12 A11 A10 A9 VSS A8 A7 A6 A5 A4 A3 A2 A1 A0 Q12 Q11 Q10 Q9 Q8 VSS NC Q7 Q6 Q5 Q4 Q13 Q14 Q15 E VPP NC VCC P NC A15 A14 1 44 A13 A12 A11 A10 A9 VSS NC A8 A7 A6 A5 12 M27C1024 34 23 Q3 Q2 Q1 Q0 G NC A0 A1 A2 A3 A4 AI00704 Warning: NC = Not Connected. Warning: NC = Not Connected. Figure 2C. TSOP Pin Connections A9 A10 A11 A12 A13 A14 A15 NC P VCC VPP E DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8 1 40 VSS A8 A7 A6 A5 A4 A3 A2 A1 A0 G DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 VSS 10 11 M27C1024 (Normal) 31 30 AI01582 Warning: NC = Not Connected. 2/15 DEVICE OPERATION The modes of operations of the M27C1024 are listed in the Operating Modes table. A single power supply is required in the read mode. All inputs are TTL levels except for...