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X4285S8-4.5A Datasheet(PDF) 2 Page - Intersil Corporation |
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X4285S8-4.5A Datasheet(HTML) 2 Page - Intersil Corporation |
2 / 21 page 2 FN8121.0 March 29, 2005 The memory portion of the device is a CMOS Serial EEPROM array with Intersil’s Block Lock protection. The array is internally organized as 64 bytes per page. The device features an 2-wire interface and software protocol allowing operation on an 2-wire bus. PIN CONFIGURATION PIN DESCRIPTION S1 VSS VCC SDA SCL 3 2 4 1 6 7 5 8 S0 WP RST/RST VCC S1 SCL RST/RST VSS 3 2 4 1 6 7 5 8 WP SDA S0 8-Pin JEDEC SOIC 8-Pin TSSOP 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 ac- tive 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 57 SDA Serial Data. SDA is a bidirectional pin used to transfer data into and out of the device. 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 al- ways 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. 68 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 X4283, X4285 |
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