intersil X9313 DATA SHEET

www.BDTIC.com/Intersil

X9313

Digitally Controlled Potentiometer (XDCP™)

Data Sheet January 15, 2008

Linear, 32 Taps, 3 Wire Interface, Terminal Voltages ± V

The Intersil X9313 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a 3-wire interface.

The potentiometer is implemented by a resistor array composed of 31 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the CS The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation.

The device can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including:

• Control

• Parameter adjustments

• Signal processing

, U/D, and INC inputs.

Features

• Solid-state potentiometer

• 3-wire serial interface

• 32 wiper tap points

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

• 31 resistive elements

- Temperature compensated

- End-to-end resistance range ±20%

- Terminal voltages, -V

• Low power CMOS = 3V or 5V

-V

- Active current, 3mA max.

- Standby current, 500µA max.

• High reliability

- Endurance, 100,000 data changes per bit

- Register data retention, 100 years

•R

values = 1kΩ, 10kΩ, 50kΩ

TOTAL

• Packages

- 8 Ld SOIC, 8 Ld MSOP and 8 Ld PDIP

• Pb-free available (RoHS compliant)

to +V

FN8177.6

Block Diagram

(SUPPLY VOLTAGE)

UP/DOWN

(U/D)

INCREMENT

(INC

)

DEVICE SELECT

(CS

)

CONTROL

AND

MEMORY

(GROUND)

GENERAL

H/VH

RW/V

RL/V

DECODER

U/D INC

5-BIT UP/DOWN COUNTER

5-BIT

NONVOLATILE

MEMORY

STORE AND

RECALL

CONTROL

CIRCUITRY

ONE OF

THIRTY-TWO

OUTPUTS

ACTIVE

AT A TIME

DETAILED

RH/V

TRANSFER

GATES

RESISTOR

ARRAY

RL/V RW/V

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

1-888-INTERSIL or 1-888-468-3774

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

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

X9313

www.BDTIC.com/Intersil

Ordering Information

TEMPERATURE

PART

PART NUMBER

X9313UMI 13UI 4.5 to 5.5 50 -40 to +85 8 Ld MSOP M8.118 X9313UMIZ (Note) DDB -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9313UP X9313UP 0 to +70 8 Ld PDIP MDP0031

X9313US* X9313USZ* (Note) X9313U Z 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9313USI X9313U I -40 to +85 8 Ld SOIC MDP0027 X9313USIZ (Note) X9313U ZI -40 to +85 8 Ld SOIC (Pb-free) M8.15 X9313WMZ (Note) DDF 10 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9313WMI* 13WI -40 to +85 8 Ld MSOP M8.118 X9313WMIZ* (Note) DDE -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9313WP X9313WP 0 to +70 8 Ld PDIP MDP0031 X9313WPZ-3 X9313WP ZD -40 to +85 8 Ld PDIP*** (Pb-free) MDP0031 X9313WPI X9313WP I -40 to +85 8 Ld PDIP MDP0031 X9313WPIZ X9313WP ZI -40 to +85 8 Ld PDIP*** (Pb-free) MDP0031 X9313WS* X9313WSZ* X9313WSI* X9313WSIZ* (Note) X9313WS ZI -40 to +85 8 Ld SOIC (Pb-free) M8.15 X9313ZM 313Z 1 0 to +70 8 Ld MSOP M8.118 X9313ZMZ (Note) DDJ 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9313ZMI* X9313ZMIZ* X9313ZP X9313ZP 0 to +70 8 Ld PDIP MDP0031 X9313ZPI X9313ZP I -40 to +85 8 Ld PDIP MDP0031 X9313ZPIZ (Note) X9313ZP ZI -40 to +85 8 Ld PDIP*** (Pb-free) MDP0031 X9313ZS* X9313ZSZ* X9313ZSI* X9313ZS I -40 to +85 8 Ld SOIC MDP0027 X9313ZSIZ* (Note) X9313ZS ZI -40 to +85 8 Ld SOIC (Pb-free) M8.15 X9313UM-3T1 13UD 3 to 5.5 50 0 to +70 8 Ld MSOP Tape and Reel M8.118 X9313UMZ-3T1 (Note) DDD 0 to +70 8 Ld MSOP Tape and Reel

X9313UMI-3* 13UE -40 to +85 8 Ld MSOP M8.118 X9313UMIZ-3* (Note) 13UEZ -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9313US-3* X9313USZ-3* X9313WM-3* 13WD 10 0 to +70 8 Ld MSOP M8.118 X9313WMZ-3* (Note) DDG 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9313WMI-3* 13WE -40 to +85 8 Ld MSOP M8.118 X9313WMIZ-3* (Note) 13WEZ -40 to +85 8 Ld MSOP (Pb-free) M8.118

** X9313U 0 to +70 8 Ld SOIC MDP0027

** X9313WS 0 to +70 8 Ld SOIC MDP0027

, **

(Note) X9313W Z 0 to +70 8 Ld SOIC (Pb-free) M8.15

** X9313WS I -40 to +85 8 Ld SOIC MDP0027

** 13ZI -40 to +85 8 Ld MSOP M8.118

** (Note) DDH -40 to +85 8 Ld MSOP (Pb-free) M8.118

** X9313ZS 0 to +70 8 Ld SOIC MDP0027

** (Note) X9313 Z 0 to +70 8 Ld SOIC (Pb-free) M8.15

** X9313U D 0 to +70 8 Ld SOIC MDP0027

, **

(Note) X9313U ZD 0 to +70 8 Ld SOIC (Pb-free) M8.15

MARKING

RANGE

(V)

TOTAL

(kΩ)

RANGE

(°C) PACKAGE

(Pb-free)

PKG.

DWG. #

M8.118

FN8177.6

January 15, 2008

X9313

www.BDTIC.com/Intersil

Ordering Information (Continued)

TEMPERATURE

PART NUMBER

X9313WS-3*, ** X9313W D 3 to 5.5 10 0 to +70 8 Ld SOIC MDP0027 X9313WSZ-3* (Note) X9313W ZD 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9313ZM-3* 13ZD 1 0 to +70 8 Ld MSOP M8.118 X9313ZMZ-3* (Note) DDK 0 to +70 8 Ld MSOP (Pb-free) M8.118 X9313ZMI-3* 13ZE -40 to +85 8 Ld MSOP M8.118 X9313ZMIZ-3* (Note) 13ZEZ -40 to +85 8 Ld MSOP (Pb-free) M8.118 X9313ZP-3 X9313ZP D 0 to +70 8 Ld PDIP MDP0031 X9313ZPZ-3 (Note) X9313ZP ZD 0 to +70 8 Ld PDIP (Pb-free)*** MDP0031

X9313ZS-3* X9313ZSZ-3* (Note) X9313Z ZD 0 to +70 8 Ld SOIC (Pb-free) M8.15 X9313ZSI-3* X9313Z E -40 to +85 8 Ld SOIC MDP0027 X9313ZSIZ-3* (Note) X9313Z ZE -40 to +85 8 Ld SOIC (Pb-free) M8.15

NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets ; m olding compoun ds/die a ttach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free sold ering operations. Intersil Pb-free products are MSL classified at Pb-free peak re flow t empe ratures t hat mee t or excee d t he P b-free requ ire ments of IPC/JEDEC J STD-020.

*Add “T1” suffix for tape and reel. Please refer to TB347 for details on reel specifications. **Add "T2" suffix for tape and reel. Please refer to TB347 for details on reel specifications. ***Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.

** X9313Z D 0 to +70 8 Ld SOIC MDP0027

PART

MARKING

RANGE

(V)

TOTAL

(kΩ)

RANGE

(°C) PACKAGE

PKG.

DWG. #

Pin Descriptions

RH/VH and RL/VL

The high (RH/VH) and low (RL/VL) terminals of the X9313 are equivalent to the fixed terminals of a mechanical potentiometer. The terminology of RL/VL and RH/VH references the relative position of the terminal in relation to wiper movement direction selected by the U/D the voltage potential on the terminal.

RW/VW

RW/VW is the wiper terminal and is equivalent to the movable terminal of a mechanical potentiometer. The position of the wiper within the array is determined by the control inputs. The wiper terminal series resistance is typically 40Ω at V

= 5V.

Up/Down (U/D)

The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented.

Increment (INC)

The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D

input.

input and not

Chip Select (CS)

The device is selected when the CS input is LOW . The current counter value is stored in nonvolatile memory when CS returned HIGH while the INC

input is also HIGH. After the

store operation is complete, the X9313 will be placed in the low power standby mode until the device is selected once again.

Pinouts

X9313

(8 LD PDIP, 8 LD SOIC)

TOP VIEW

INC U/D

RH/VH

VSS

RH/VH

VSS

RW/VW

RL/VL

1 2

X9313

3 4

X9313

(8 LD MSOP)

TOP VIEW

1 2

X9313

3 4

VCC

RL/VL

RW/VW

U/D

INC

VCC

FN8177.6

January 15, 2008

X9313

www.BDTIC.com/Intersil

TABLE 1. PIN NAMES

SYMBOL DESCRIPTION

RH/VH High terminal

RW/VW Wiper terminal

RL/VL Low terminal

VSS Ground

VCC Supply voltage

U/D INC Increment control input

CS Chip Select control input

Up/Down control input

Principles of Operation

There are three sections of the X9313: the input control, counter and decode section; the nonvolatile memory; and the resistor array. The input control section operates just like an up/down counter. The output of this counter is decoded to turn on a single electronic switch connecting a point on the resistor array to the wiper output. Under the proper conditions, the contents of the counter can be stored in nonvolatile memory and retained for future use. The resistor array is comprised of 31 individual resistors connected in series. At either end of the array and between each resistor is an electronic switch that transfers the potential at that point to the wiper.

The wiper, when at either fixed terminal, acts like its mechanical equivalent and does not move beyond the last position. That is, the counter does not wrap around when clocked to either extreme.

The electronic switches on the device operate in a “make before break” mode when the wiper changes tap positions. If the wiper is moved several positions, multiple taps are connected to the wiper for t R

value for the device can temporarily be reduced by

TOTAL

a significant amount if the wiper is moved several positions. When the device is powered-down, the last wiper position

stored will be maintained in the nonvolatile memory. When power is restored, the contents of the memory are recalled and the wiper is set to the value last stored.

Instructions and Programming

The INC, U/D and CS inputs control the movement of the wiper along the resistor array. With CS is selected and enabled to respond to the U/D inputs. HIGH to LOW transitions on INC decrement (depending on the state of the U/D bit counter. The output of this counter is decoded to select one of thirty-two wiper positions along the resistive array.

(INC to VW change). The

set LOW the device

and INC

will increment or

input) a seven

The system may select the X9313, move the wiper and deselect the device without having to store the latest wiper position in nonvolatile memory. After the wiper movement is performed as previously described and once the new position is reached, the system must keep INC taking CS

HIGH. The new wiper position will be maintained

LOW while

until changed by the system or until a power-up/down cycle recalled the previously stored data.

This procedure allows the system to always power-up to a preset value stored in nonvolatile memory; then during system operation, minor adjustments could be made. The adjustments might be based on user preference, system parameter changes due to temperature drift, etc.

The state of U/D

may be changed while CS remains LOW. This allows the host system to enable the device and then move the wiper up and down until the proper trim is attained.

TABLE 2. MODE SELECTION

CS INC U/D MODE

L H Wiper up L L Wiper down

H X Store wiper position

H X X Standby current

L X No store, return to standby L H Wiper up (not recommended) L L Wiper down (not recommended)

Symbol Table

WAVEFORM INPUTS OUTPUTS

Must be steady

May change from Low to High

May change from High to Low

Don’t Care: Changes Allowed

N/A Center Line

Will be steady

Will change from Low to High

Will change from High to Low

Changing: State Not Known

is High Impedance

The value of the counter is stored in nonvolatile memory whenever CS

transitions HIGH while the INC input is also

HIGH.

FN8177.6

January 15, 2008

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