X9420WS datasheet(11/20 Pages) XICOR

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X9420

Characteristics subject to change without notice.

11 of 20

REV 1.1.6 7/30/02

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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)

µA

SCK = SI = VSS, Addr. = VSS

ILI

Input Leakage Current

µAVIN = VSS to VCC

ILO

Output Leakage Current

µAVOUT = VSS to VCC

VIH

Input HIGH Voltage

VCC x 0.7

VCC + 0.5

VIL

Input LOW Voltage

–0.5

VCC x 0.1

VOL

Output LOW Voltage

0.4

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)

VOUT = 0V

CIN

(5)

Input Capacitance (A0, SI, and SCK)

VIN = 0V

Symbol

Parameter

Max.

Units

tPUR

(6)

Power-up to Initiation of Read Operation

tPUW

(6)

Power-up to Initiation of Write Operation

tRVCC

VCC Power up Ramp

0.2

V/msec

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