X9421 datasheet(13/21 Pages) XICOR

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X9421

REV 1.1.6 8/1/02

Characteristics subject to change without notice.

13 of 21

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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 and then the potentiometer pins, RH, RL, and RW.

Voltage should not be applied to the potentiometer pins before VCC 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. Also, VCC

should not reverse polarity by more than 0.5V. Recall of wiper position will not be complete until VCC reaches its

ﬁnal value.

Notes: (5)

This parameter is periodically sampled and not 100% tested.

A.C. TEST CONDITIONS

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

tRVCC

(5)

VCC Power up Ramp

0.2

V/msec

Input pulse levels

VCC x 0.1 to VCC x

0.9

Input rise and fall times

10ns

Input and output timing level

VCC x 0.5

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