intersil X93254 DATA SHEET

®

www.BDTIC.com/Intersil

X93254

Data Sheet February 4, 2008

Dual Digitally Controlled Potentiometers
(XDCPs™)

The Intersil X93254 is a dual digitally controlled
potentiometer (XDCP). The device consists of two resistor
arrays, wiper switches, a control section, and nonvolatile
memory. The wiper positions are controlled by individual
Up/Down interfaces.

A potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. The position of each wiper element is controlled by
a set of independent CS

, U/D, and INC inputs. The position
of the wiper can be stored in nonvolatile memory and then
be recalled upon during a subsequent power-up operation.

Each potentiometer is connected as a two-terminal variable
resistor and can be used in a wide variety of applications
including:

• Bias and Gain control

• LCD Contrast Adjustment

Pinout

X93254

(14 LD TSSOP)

TOP VIEW

Features

• Dual solid-state potentiometers

• Independent Up/Down interfaces

• 32 wiper tap points per potentiometer

- Wiper position stored in nonvolatile memory and
recalled on power-up

• 31 resistive elements per potentiometer

- Temperature compensated

- Maximum resistance tolerance of ± 30%

- Terminal voltage, 0 to V

• Low power CMOS

-V

= 3V ±10%

CC

- Active current, 250µA max

- Standby current, 1µA max

• High reliability

- Endurance 200,000 data changes per bit

- Register data retention, 100 years

TOTAL

value = 50kΩ

•R

• 14 Ld TSSOP package

CC

FN8186.1

DNC*

R

CS
INC
U/D

R

V

*Do not connect.

L1

H2

SS

1

2

1

3

2

4
5

2

6
7

14

13

12

11
10

R

H1

U/D

1

INC

1

V

CC

CS

2

R

9
8

L2

DNC*

Ordering Information

PART NUMBER PART MARKING VCC LIMITS (V) R

X93254UV141-3 X9325 4UVE 3 ±10% 50 -40 to +85 14 Ld TSSOP M14.173

TOTAL

(kΩ)

TEMP

RANGE (°C) PACKAGE PKG DWG. #

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or1-888-468-3774

XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005, 2008. All Rights Reserved

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Block Diagram

www.BDTIC.com/Intersil

UP/DOWN

(U/D1)

INCREMENT

(INC

DEVICE SELECT

(CS

UP/DOWN

(U/D2)

INCREMENT

(INC

DEVICE SELECT

(CS

X93254

(SUPPLY VOLTAGE)

V

CC

R

30k

30k

CONTROL

)

1

)

1

)

2

)

2

AND

MEMORY

CONTROL

AND

MEMORY

V

(Ground)

SS

H1

R

L1

R

H2

R

L2

Pin Descriptions

TSSOP SYMBOL DESCRIPTION

1 DNC Do Not Connect
2R
3CS
4INC
5U/D
6R
7V
8 DNC Do Not Connect

9R
10 CS
11 V
12 INC
13 U/D
14 R

L1

H2

SS

L2

CC

H1

Low Terminal 1

1

2
2

Chip Select 1
Increment 2
Up/Down 2
High Terminal 2

Ground

Low Terminal 2

2

Chip Select 2

Supply Voltage

1
1

Increment 1
Up/Down 1
High Terminal 1

2

FN8186.1

February 4, 2008

X93254

www.BDTIC.com/Intersil

Absolute Maximum Ratings Thermal Information

Voltage on CS, INC, U/D, RH, RL and V

with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . . . .-1V to +6.5V

Maximum resistor current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA

CC

Recommended Operating Conditions

Temperature Range

Industrial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Supply Voltage

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3V ±10% (Note 6)

V

CC

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.

NOTES:

1. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (V
n = 1 .. 29 only

2. Relative linearity is a measure of the error in step size between taps = V

3. 1 Ml = Minimum Increment = R

4. Typical values are for T

5. Limits established by characterization and are not production tested.

6. When performing multiple write operations, V

7. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.

= +25°C and nominal supply voltage.

A

TOT

/31.

must not decrease by more than 150mV from its initial value.

CC

Temperature under bias. . . . . . . . . . . . . . . . . . . . . .-65°C to +135°C

Storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C

Lead temperature (soldering 10s) . . . . . . . . . . . . . . . . . . . . .+300°C

Maximum reflow temperature (40s). . . . . . . . . . . . . . . . . . . .+240°C

H(n+1)

- [V

(actual) - V

H(n)

+ Ml] = ±0.5 Ml, n = 1 .. 29 only.

H(n)

(expected)) = ±1 Ml Maximum.

H(n)

Potentiometer Specifications Over recommended operating conditions, unless otherwise stated.

MIN

SYMBOL PARAMETER TEST CONDITIONS/NOTES

R

TOT

V

R

I

W

C

H/CL/CW

R

W

End-to-End Resistance 37.5 50 62.5 kΩ
RH, RL Terminal Voltages 0 V
Power Rating R

Noise Ref: 1kHz -120 dBV

Wiper Resistance (Note 5) 1000 Ω
Wiper Current (Note 5) 0.6 mA
Resolution 3%
Absolute Linearity

Relative Linearity

Temperature Coefficient (Note 5) ±35 ppm/°C

R

TOTAL

Potentiometer Capacitances See “Circuit #2 SPICE Macro

(Note 1) V

(Note 2) V

= 50kΩ 1mΩ

TOTAL

- [V

H(n)+MI

- V

H(n)(expected)

H(n)(actual)

H(n+1)

Model” on page 4

(Note 7)

TYP

(Note 4)

10/10/25 pF

MAX

(Note 7) UNIT

CC

(Note 5)

(Note 5)

±1 MI

(Note 3)

±0.5 MI

(Note 3)

(Note 5)

V

3

FN8186.1

February 4, 2008