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X9420WPI-2.7 Datasheet(PDF) 11 Page - Xicor Inc. |
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X9420WPI-2.7 Datasheet(HTML) 11 Page - Xicor Inc. |
11 / 20 page X9420 Characteristics subject to change without notice. 11 of 20 REV 1.1.6 7/30/02 www.xicor.com D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) ENDURANCE AND DATA RETENTION CAPACITANCE POWER-UP TIMING POWER UP REQUIREMENTS (Power up sequencing can affect correct recall of the wiper registers) The preferred power-on sequence is as follows: First VCC, then V+ and V–, and then the potentiometer pins, RH, RL, and RW. Voltage should not be applied to the potentiometer pins before V+ or V– is applied. The VCC ramp rate specification should be met, and any glitches or slope changes in the VCC line should be held to <100mV if possible. If VCC powers down, it should be held below 0.1V for more than 1 second before powering up again in order for proper wiper register recall. Also, VCC should not reverse polarity by more than 0.5V. Recall of wiper position will not be complete until VCC, V+ and V– reach their final value. Notes: (5) This parameter is periodically sampled and not 100% tested. (6) tPUR and tPUW are the delays required from the time the third (last) power supply (VCC, V+ or V-) is stable until the specific instruction can be issued. These parameters are periodically sampled and not 100% tested. Symbol Parameter Limits Test Conditions Min. Typ. Max. Units ICC1 VCC Supply Current (Active) 400 µA fSCK = 2MHz, SO = Open, Other Inputs = VSS ICC2 VCC Supply Current (Non-volatile Write) 1mA fSCK = 2MHz, SO = Open, Other Inputs = VSS ISB VCC Current (Standby) 1 µA SCK = SI = VSS, Addr. = VSS ILI Input Leakage Current 10 µAVIN = VSS to VCC ILO Output Leakage Current 10 µAVOUT = VSS to VCC VIH Input HIGH Voltage VCC x 0.7 VCC + 0.5 V VIL Input LOW Voltage –0.5 VCC x 0.1 V VOL Output LOW Voltage 0.4 V IOL = 3mA Parameter Min. Units Minimum Endurance 100,000 Data Changes per Bit per Register Data Retention 100 Years Symbol Test Max. Units Test Conditions COUT (5) Output Capacitance (SO) 8 pF VOUT = 0V CIN (5) Input Capacitance (A0, SI, and SCK) 6 pF VIN = 0V Symbol Parameter Max. Max. Units tPUR (6) Power-up to Initiation of Read Operation 1 1 ms tPUW (6) Power-up to Initiation of Write Operation 5 5 ms tRVCC VCC Power up Ramp 0.2 50 V/msec |
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