M27V320 Datasheet | STMicroelectronics

The M27V320 is a low voltage 32 Mbit EPROM offered in the OTP range (one time programmable). It is ideally suited for microprocessor systems requiring large data or program storage. It is organised as either 4 MWords of 8 bit or 2 MWords of 16 bit. The pin-out is patible with the 32 Mbit Mask ROM. The M27V320 is offered in SO44 and TSOP48 (12 x 20 mm) packages. 21 A0-A20 15 Q15A- 1 Q0-Q14 E GVPP M27V320 BYTE AI05852 August 2002 1/15 Figure 2. SO Connections Figure 3. TSOP Connections NC A18 A17 A7 A6 A5 A4 A3 A2 A1 A0 E VSS GVPP Q0 Q8 Q1 Q9 Q2 Q10 Q3 Q11 44 1 43 2 3 42 4 41 40 5 39 6 38 7 37 8 36 9 35 10 34 11 M27V320 33 12 32 13 31 14 30 15 29 16 17 28 18 27 19 26 20 25 21 24 22 23 AI05853 A20 A19 A8 A9 A10 A11 A12 A13 A14 A15 A16 BYTE VSS Q15A- 1 Q7 Q14 Q6 Q13 Q5 Q12 Q4 VCC BYTE A16 A15 A14 A13 A12 A11 A10 A9 A8 A19 VSS A20 A18 A17 A7 A6 A5 A4 A3 A2 A1 A0 E 12 13 37 36 AI05854 VSS VSS Q15A- 1 Q7 Q14 Q6 Q13 Q5 Q12 Q4 VCC VCC VSS Q11 Q3 Q10 Q2 Q9 Q1 Q8 Q0 GVPP VSS VSS Table 1. Signal Names A0-A20 Q0-Q7 Q8-Q14 Q15A- 1 E GVPP BYTE VCC VSS NC Address Inputs Data Outputs Data Outputs Data Output / Address Input Chip Enable Output Enable / Program Supply Byte-Wide Select Supply Voltage Ground Not Connected Internally DEVICE OPERATION The operating modes of the M27V320 are listed in the Operating Modes Table. A single power supply is required in the read mode. All inputs are TTL patible except for VPP and 12V on A9 for the Electronic Signature. Read Mode The M27V320 has two organisations, Word-wide and Byte-wide. The organisation is selected by the signal level on the BYTE pin. When BYTE is at VIH the Word-wide organisation is selected and the Q15A- 1 pin is used for Q15 Data Output. When the BYTE pin is at VIL the Byte-wide organisation is selected and the Q15A- 1 pin is used for the Address Input A- 1. When the memory is logically regarded as 16 bit wide, but read in the Byte-wide organisation, then with A- 1 at VIL the...