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X4645V8I-2.7 Datasheet(PDF) 2 Page - Xicor Inc. |
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X4645V8I-2.7 Datasheet(HTML) 2 Page - Xicor Inc. |
2 / 22 page X4643/5 – Preliminary Information Characteristics subject to change without notice. 2 of 22 REV 1.26 4/30/02 www.xicor.com standard VTRIP thresholds are available, however, Xicor’s unique circuits allow the threshold to be reprogrammed to meet custom requirements or to fine- tune the threshold for applications requiring higher precision. PIN CONFIGURATION S1 VSS VCC SDA SCL 3 2 4 1 6 7 5 8 S0 WP RESET/RESET VCC S1 SCL RESET/RESET VSS 3 2 4 1 6 7 5 8 WP SDA S0 8-Pin JEDEC SOIC 8 Pin TSSOP PIN FUNCTION Pin (SOIC) Pin (TSSOP) Name Function 13 S0 Device Select Input 24 S1 Device Select Input 35 RESET/ RESET Reset Output. RESET/RESET is an active LOW/HIGH, open drain output which goes active whenever VCC falls below the minimum VCC sense level. It will remain active until VCC rises above the minimum VCC sense level for 250ms. RESET/ RESET goes active if the Watchdog Timer is enabled and SDA remains either HIGH or LOW longer than the selectable Watchdog time out period. A falling edge on SDA, while SCL is HIGH, resets the Watchdog Timer. RESET/RESET goes active on power up and remains active for 250ms after the power supply stabilizes. 46 VSS Ground 5 7 SDA Serial Data. SDA is a bidirectional pin used to transfer data into and out of the de- vice. It has an open drain output and may be wire ORed with other open drain or open collector outputs. This pin requires a pull up resistor and the input buffer is always active (not gated). Watchdog Input. A HIGH to LOW transition on the SDA (while SCL is HIGH) restarts the Watchdog timer. The absence of a HIGH to LOW transition within the watchdog time out period results in RESET/RESET going active. 6 8 SCL Serial Clock. The Serial Clock controls the serial bus timing for data input and output. 71 WP Write Protect. WP HIGH used in conjunction with WPEN bit prevents writes to the control register. 82 VCC Supply Voltage |
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