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REV 1.4.7 9/8/03

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X90100

PIN CONFIGURATION

X90100 ORDERING CODES

PIN DESCRIPTIONS

Ordering

Number

Ctotal

Package

Temperature

Range

X90100M8I

7.5pF to 14.5pF, Single Ended

8-lead MSOP

-40C to +85C

X90100X8I

7.5pF to 14.5pF, Single Ended

8-lead FCP

-40C to +85C

Pin Number

Symbol

Brief Description

MSOP

FCP

1

6

INC

Increment (INC). The INC input is negative-edge triggered. Toggling INC will move the

capacitance value and either increment or decrement the counter in the direction indicat-

ed by the logic level on the U/D input.

2

7

U/D

Up/Down (U/D). The U/D input controls the direction of the trimmed capacitor value and

whether the counter is incremented or decremented.

38

Ground.

45

Cp

Cp. The high (Cp) and low (Cm) terminals of the X90100 are equivalent to the fixed ter-

inputs INC, U/D, and CS.

54

Cm

Cm. The high (Cp) and low (Cm) terminals of the X90100 are equivalent to the fixed ter-

inputs INC, U/D, and CS.

6

2

N/C

Not Connected. Must be floating.

71

CS

Chip Select (CS). The device is selected when the CS input is LOW. The current counter

value is stored in nonvolatile memory when CS is returned HIGH while the INC input is

also HIGH. After the store operation is complete the X90100 will be placed in the low

power standby mode until the device is selected once again.

83

Positive Supply Voltage.

CS

INC

U/D

1

2

3

4

8

7

6

5

X90100

MSOP

N/C

Cm

Vss

Cp

Blank =2.7V to 5.5V

Temperature Range

I = Industrial = –40

°C to +85°C

Package

M = 8-Lead MSOP

X = 8-Bump FCP (Flipchip)

Base Part Number

X90100

X

X

X

1

2

3

4

6

5

78

X90100

FCP