Features
- Four Potentiometers in One Package
- 64 Resistor Taps per Potentiometer
- 2-wire Serial Interface
- Wiper Resistance, 40Ω Typical at 5V
- Four Nonvolatile Data Registers for Each Pot
- Nonvolatile Storage of Wiper Position
- Standby Current 1µA max (Total Package)
- VCC = 2.7V to 5.5V Operation
- V+ = 2.7V to 5.5V
- V- = -2.7V to -5.5V
- 10kΩ, 2.5kΩ End to End Resistances
- High reliability
- Endurance-100,000 Data Changes Per Bit Per Register
- Register Data Retention-100 years
- 24 Ld SOIC, 24 Ld TSSOP, 24 Ld PDIP Packages
- Pb-Free (RoHS Compliant)
X9408 Functional Diagram
Description
Support is limited to customers who have already adopted these products.
The X9408 integrates four digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 63 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-wire bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four non-volatile Data Registers that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. Power-up recalls the contents of the default data register (DR0) to the WCR. The XDCP 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, and signal processing.
| Part Number | Status | Samples | Stock | Package | Carrier Type | MOQ |
|---|---|---|---|---|---|---|
| X9408WS24IZ-2.7 | Obsolete | N/A | Out of Stock | SOICW | Tube | 360 |
| X9408WS24IZ-2.7T2 | Obsolete | N/A | Out of Stock | SOICW | Reel | 1000 |
| X9408WV24IZ | Obsolete | N/A | Out of Stock | TSSOP | Tube | 248 |
| X9408WV24IZ-2.7 | Obsolete | N/A | Out of Stock | TSSOP | Tube | 248 |
| X9408WV24IZ-2.7T1 | Obsolete | N/A | Out of Stock | TSSOP | Reel | 2500 |
| X9408WV24IZT1 | Obsolete | N/A | Out of Stock | TSSOP | Reel | 2500 |
| X9408WV24Z | Obsolete | N/A | Out of Stock | TSSOP | Tube | 372 |
| X9408WV24Z-2.7 | Obsolete | N/A | Out of Stock | TSSOP | Tube | 248 |
| X9408WV24Z-2.7T1 | Obsolete | N/A | Out of Stock | TSSOP | Reel | 2500 |
| X9408WV24ZT1 | Obsolete | N/A | Out of Stock | TSSOP | Reel | 2500 |
| X9408YV24IZ-2.7 | Obsolete | N/A | Out of Stock | TSSOP | Tube | 124 |
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- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- End Of Life NoticePDF 270 KB PLC14054 Nov 26, 2014
- Product Change NoticePDF 237 KB PCN13065 Dec 24, 2013
- Product Change NoticePDF 121 KB PCN11113A Aug 13, 2012
- Product Change NoticePDF 120 KB PCN11113 Oct 31, 2011
- Product Change NoticePDF 161 KB PCN11089 Sep 14, 2011
- Application NotePDF 281 KB an1425 May 22, 2008AI-generated Summary: Digitally Controlled Potentiometers (DCPs) offer precise resistance control with configurations in both serial and parallel modes, featuring fixed resistors and various resistance options. The ISL22317 model provides 1% precision with 128 taps and can function as a two-terminal variable resistor or three-terminal potentiometer, delivering high accuracy and low temperature coefficient. DCPs can outperform DACs in fine tuning within limited ranges, offering better resolution with fewer bits. Resolution varies with voltage and tap count, as detailed in the provided tables. Usage guidelines and liability disclaimers emphasize proper application and safety considerations.
- Application NotePDF 717 KB an144 Jul 08, 2005AI-generated Summary: The report evaluates the signal integrity of XDCP audio components through SNR and THD+N measurements. All tested parts demonstrate exceptional low-level harmonic distortion below -100dB and high signal-to-noise ratios around 119-120dB at 1kHz. Dual tone tests confirm minimal intermodulation distortion, ensuring these components maintain audio clarity and integrity. Applications include filters, analog signal processing, and linear level control where precise audio signal attenuation is critical.
- Application NotePDF 750 KB an139 Jun 30, 2005AI-generated Summary: The document details the design of power supplies using Intersil’s XDCP mixed signal products. It explains four key circuit schematics: Front End, Power Mesh, Secondary Control, and Primary Control, highlighting their interconnections. The Front End converts AC line power to an unregulated 320V DC, incorporating protection and EMI filtering components. The Power Mesh is a single switch forward DC/DC converter that regulates 320V DC to 12V DC at 10A, using a cascode transistor arrangement and a digitally controlled switching frequency to meet EMI requirements.
- Application NotePDF 507 KB an1144 Jun 13, 2005AI-generated Summary: This document details interfacing the X9408 and X9418 XDCP devices with 8051 microcontrollers. It includes register definitions, command codes, and assembly routines to execute various instructions such as reading and writing WCRs and data registers, transferring data between registers, and incrementing wiper positions. The code structure uses jump tables for instruction handling and provides specific bit manipulations for command generation.
Recommended Documents (1)
Datasheets (1)
- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
Manuals & Guides (1)
- Application NotePDF 281 KB an1425 May 22, 2008AI-generated Summary: Digitally Controlled Potentiometers (DCPs) offer precise resistance control with configurations in both serial and parallel modes, featuring fixed resistors and various resistance options. The ISL22317 model provides 1% precision with 128 taps and can function as a two-terminal variable resistor or three-terminal potentiometer, delivering high accuracy and low temperature coefficient. DCPs can outperform DACs in fine tuning within limited ranges, offering better resolution with fewer bits. Resolution varies with voltage and tap count, as detailed in the provided tables. Usage guidelines and liability disclaimers emphasize proper application and safety considerations.
- Application NotePDF 717 KB an144 Jul 08, 2005AI-generated Summary: The report evaluates the signal integrity of XDCP audio components through SNR and THD+N measurements. All tested parts demonstrate exceptional low-level harmonic distortion below -100dB and high signal-to-noise ratios around 119-120dB at 1kHz. Dual tone tests confirm minimal intermodulation distortion, ensuring these components maintain audio clarity and integrity. Applications include filters, analog signal processing, and linear level control where precise audio signal attenuation is critical.
- Application NotePDF 750 KB an139 Jun 30, 2005AI-generated Summary: The document details the design of power supplies using Intersil’s XDCP mixed signal products. It explains four key circuit schematics: Front End, Power Mesh, Secondary Control, and Primary Control, highlighting their interconnections. The Front End converts AC line power to an unregulated 320V DC, incorporating protection and EMI filtering components. The Power Mesh is a single switch forward DC/DC converter that regulates 320V DC to 12V DC at 10A, using a cascode transistor arrangement and a digitally controlled switching frequency to meet EMI requirements.
- Application NotePDF 507 KB an1144 Jun 13, 2005AI-generated Summary: This document details interfacing the X9408 and X9418 XDCP devices with 8051 microcontrollers. It includes register definitions, command codes, and assembly routines to execute various instructions such as reading and writing WCRs and data registers, transferring data between registers, and incrementing wiper positions. The code structure uses jump tables for instruction handling and provides specific bit manipulations for command generation.
- Application NotePDF 534 KB an133 Jun 06, 2005AI-generated Summary: The document explains how digitally controlled potentiometers (XDCPs) enable programmability in amplifier circuits by adjusting cutoff frequency and gain. It details the design of a non-inverting amplifier with variable resistors forming an RC low pass filter and gain control. Techniques to reduce potentiometer resistance for high-frequency applications are described, allowing gain from 1 to 2 and cutoff frequency from 130kHz to over 1MHz. The amplifier’s parameters are controlled via a serial bus, enabling computer-based customization.View More (16)
Application Notes & White Papers (16)
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- End Of Life NoticePDF 270 KB PLC14054 Nov 26, 2014
Product Notices (PCN, EOL, etc) (9)
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