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M48T251Y Datasheet(PDF) 5 Page - STMicroelectronics |
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M48T251Y Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 24 page 5/24 M48T251Y, M48T251V Figure 3. DIP Connections Figure 4. Block Diagram VCC CE M48T251Y M48T251V DQ3 DQ4 DQ5 DQ6 DQ7 A0 A1 A2 A3 OE WE A16 A17 2 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 31 DQ1 DQ2 VSS DQ0 A10 A11 A9 A8 A13 A15 A14 A12 A4 A6 A5 A7 A18/RST AI04239 UPDATE DQ0 VCC VBAT DATA INTERNAL VCC READ WRITE 32.768 Hz CRYSTAL XI XO POWER FAIL A0–A16 DQ0–DQ7 CLOCK/CALENDAR LOGIC TIMEKEEPER REGISTER SRAM CONTROL LOGIC ACCESS ENABLE SEQUENCE DETECTOR COMPARISON REGISTER I/O BUFFERS POWER-FAIL DETECT LOGIC RST WE OE CE AI04238 |
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