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M27C1024-20B3TR Datasheet(PDF) 2 Page - STMicroelectronics |
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M27C1024-20B3TR Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 15 page Q6 Q5 Q4 Q11 Q8 VSS Q7 Q10 Q9 A12 A8 A11 A10 A6 A13 A9 VSS A7 A2 Q1 Q0 A0 G A1 A5 NC P E Q12 VPP VCC Q15 AI00703 M27C1024 8 1 2 3 4 5 6 7 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Q3 Q2 Q14 Q13 A4 A3 40 39 38 37 36 35 34 33 A14 A15 Figure 2A. DIP Pin Connections AI00704 A11 A7 23 Q6 Q5 Q4 Q12 Q8 VSS NC Q11 Q10 12 A9 1 VSS A12 A5 44 M27C1024 A13 NC A6 34 Q9 A10 A8 Q7 Figure 2B. LCC Pin Connections Warning: NC = Not Connected. 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 Vpp and 12V on A9 for Electronic Signature. Read Mode The M27C1024 has two control functions, both of which must be logically active in order to obtain data at the outputs. Chip Enable (E) is the power control and should be used for device selection. Output Enable (G) is the output control and should be used to gate data to the output pins, inde- pendent of device selection. Assuming that the addresses are stable, the address access time (tAVQV) is equalto the delay from E to output (tELQV). Data is available at the output after a delay of tOE from the falling edge of G, assuming that E has been low and the addresses have been stable for at least tAVQV-tGLQV. Standby Mode The M27C1024 has a standby mode which re- duces the active current from 35mA to 100 µA. The M27C1024 is placed in the standby mode by applying a TTL high signal to the E input. When in the standby mode, the outputs are in a high imped- ance state, independent of the G input. Warning: NC = Not Connected. DQ6 DQ3 DQ2 DQ13 DQ8 DQ7 DQ10 DQ9 A14 A8 A11 A10 A4 A15 A9 G A7 A2 DQ1 DQ0 A0 A1 A3 NC P E DQ14 VPP VCC DQ15 AI01582 M27C1024 (Normal) 10 1 11 20 21 30 31 40 VSS A12 A6 A13 A5 DQ12 DQ4 DQ11 DQ5 VSS Figure 2C. TSOP Pin Connections Warning: NC = Not Connected. 2/15 M27C1024 |
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