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Renesas X9241AUSIT2
- Part No.:
- X9241AUSIT2
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X9241AUSIT2.pdf
- Description:
- IC DGTL POT 50KOHM 64TAP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,639
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Product details
Overview
X9241AUSIT2 from Intersil is a quad digital controlled potentiometer (XDCP™) IC with nonvolatile storage, 2-wire I²C interface, 64-tap resolution per channel, ±3.0V to +5V terminal voltage range, and 2kΩ/10kΩ/50kΩ selectable resistor arrays-used for precision analog trimming in programmable power supplies, sensor calibration circuits, and audio level control systems.
For engineers reviewing the X9241AUSIT2 datasheet, X9241AUSIT2 pinout, X9241AUSIT2 application, or X9241AUSIT2 equivalent, key selection criteria include wiper current limits (±3mA for 10kΩ/50kΩ arrays), cascade mode support for extended resistance values, nonvolatile register endurance (100,000 cycles), and industrial temperature operation (-40°C to +85°C).
Technical Context
The X9241AUSIT2 implements four independent 63-element resistor arrays with decoded 6-bit Wiper Counter Registers (WCR), each backed by four nonvolatile Data Registers (DR0–DR3). Each potentiometer supports direct WCR write, DR-to-WCR transfer, global register operations, and real-time increment/decrement via SCL clocking.
It uses a standard 2-wire I²C-compatible interface with slave address formed by fixed 0101b prefix plus user-configurable A0–A3 pins. The CM bit (bit 7 of WCR) enables cascading between adjacent arrays, while DW bit (bit 6) disables wiper output to float the VW/RW terminal-enabling flexible analog routing without external switches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Four independent digitally controlled potentiometers on single die |
| Resolution | 64 taps per potentiometer (6-bit WCR addressing) |
| Resistance Options | 2kΩ, 10kΩ, or 50kΩ per array; cascadable up to 200kΩ |
| Interface | 2-wire I²C-compatible bus with 100kHz max clock frequency |
| Nonvolatile Memory | 16 bytes (4 registers × 4 pots), 100-year data retention, 100k write cycles |
| Terminal Voltage Range | +5V, -3.0V referenced to VSS-supports bipolar analog signal conditioning |
| Wiper Current Limit | ±3mA max for 10kΩ/50kΩ arrays; ±4mA for 2kΩ arrays |
| Operating Temp | -40°C to +85°C (industrial grade) |
Pinout & Package
Package: 20-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant, Pb-free matte tin termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply rail | 5V ±10% main power input; powers internal logic and analog arrays |
| VSS | Ground reference | Common return path for all analog and digital circuitry |
| SCL | Serial clock input | Master-generated I²C clock; controls timing of all data transfers |
| SDA | Serial data bidirectional | Open-drain I²C data line requiring external pull-up; supports multi-drop bus |
| A0–A3 | Slave address inputs | Set LSBs of 8-bit I²C address (0101xxxxb); enable up to 16 devices on same bus |
| VH0–VH3 / VL0–VL3 | Potentiometer high/low terminals | Fixed end points of each resistor array; VH/RH and VL/RL are functionally identical per channel |
| VW0–VW3 | Wiper outputs | Analog output nodes; position determined by WCR; can be disabled via DW bit to float |
Key Features
| Feature | Design Value |
|---|---|
| Quad integration | Four independent XDCP channels reduce board space and interconnect complexity vs. discrete solutions |
| Cascade mode | Enables serial connection of arrays (e.g., Pot2→Pot3) to synthesize 4kΩ–200kΩ values without external resistors |
| Power-up recall | Automatically loads DR0 into WCR at startup-ensures known analog state after reset or cold boot |
| Wiper disable control | DW bit in WCR electrically isolates VW/RW output, eliminating leakage paths during standby or reconfiguration |
| Register-oriented command set | Supports atomic read/write/transfer operations across volatile WCR and nonvolatile DRs-enabling robust firmware calibration workflows |
Applications
| Programmable Power Supply Trim | Sensor Signal Conditioning |
|---|---|
Use Scenario: Adjusting feedback divider ratios in DC-DC converters to maintain precise output voltage under load and temperature variation. IC Role / Device Role / Timing Role: Four-channel XDCP acts as digitally reconfigurable voltage divider network, replacing mechanical trimpots and enabling factory calibration and field updates. Use Value: Eliminates manual tuning; supports closed-loop calibration routines using MCU-controlled I²C writes to DR registers and WCR recall on power-up. | Use Scenario: Compensating offset and gain drift in bridge-based pressure or temperature sensors before ADC input. IC Role / Device Role / Timing Role: X9241AUSIT2 provides two independent potentiometers-one for zero-offset nulling, one for span adjustment-within same package. Use Value: Enables single-point calibration at production and periodic recalibration in-field using stored DR values, improving long-term measurement accuracy beyond 0.1%. |
| Audio Channel Level Control | Industrial Analog I/O Module |
Use Scenario: Implementing software-controlled volume/gain control in professional audio mixers or codec interfaces. IC Role / Device Role / Timing Role: Dual potentiometers (e.g., Pot0/Pot1) serve as left/right channel attenuators; wiper positions updated via I²C during mute/unmute or fade transitions. Use Value: Provides glitch-free analog attenuation with monotonic step response (±0.2 MI relative linearity), avoiding zipper noise common in PWM-based digital pots. | Use Scenario: Configuring input scaling and output drive levels in modular PLC analog I/O cards supporting multiple sensor types. IC Role / Device Role / Timing Role: All four XDCP channels used for simultaneous calibration of 4-channel 4–20mA transmitter outputs and differential input gain/offset settings. Use Value: Enables full channel-by-channel calibration data storage in nonvolatile registers, surviving power loss and supporting hot-swap module replacement with retained settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5204BRUZ10 | Quad 10kΩ pot; SPI interface; no cascade mode; 256-tap resolution | Lacks I²C compatibility and resistor array cascading; requires separate SPI master resource | Choose when higher resolution (256 taps) and SPI-native host architecture outweigh need for cascade flexibility and I²C bus sharing |
| MCP42050-I/SL | Quad 50kΩ pot; SPI interface; volatile-only memory; no nonvolatile registers | No DR0–DR3 storage; wiper position lost on power cycle; requires external EEPROM for calibration persistence | Prefer when cost sensitivity dominates and calibration data is managed externally or reloaded at boot via host firmware |
Compared with AD5204BRUZ10 and MCP42050-I/SL, the X9241AUSIT2 uniquely combines I²C compatibility, nonvolatile register storage with power-up recall, and hardware-supported cascading-making it optimal for embedded systems requiring autonomous analog configuration recovery and extended resistance synthesis without added components.
Availability
X9241AUSIT2 is available at Aetrix Electronics and suitable for programmable power supplies, sensor calibration systems, audio level control circuits, and industrial analog I/O modules requiring stable component supply across commercial and industrial temperature ranges.
Supply support for X9241AUSIT2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Intersil Corporation is a leading provider of precision analog and power management ICs, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.
The X9241A product line was designed for embedded analog reconfiguration tasks-specifically targeting applications needing nonvolatile calibration storage, multi-channel integration, and I²C-based system-level control without external memory or complex firmware overhead.
FAQ
What is the maximum wiper current rating for X9241AUSIT2 when configured with 10kΩ resistor arrays?
The maximum wiper current for X9241AUSIT2 with 10kΩ or 50kΩ resistor arrays is ±3mA. This limit applies across the full operating temperature range (-40°C to +85°C) and ensures reliable switch FET operation and long-term endurance. Exceeding this current may degrade wiper resistance stability or accelerate wear in the internal CMOS switches. The X9241AUSIT2 datasheet specifies derating curves for elevated temperatures, and design margins should account for worst-case voltage differentials across the array.
Does X9241AUSIT2 support true I²C bus communication, including ACK polling during nonvolatile writes?
Yes, X9241AUSIT2 fully supports standard I²C protocol-including START/STOP conditions, 7-bit slave addressing (0101xxxxb), and ACK polling. After issuing a nonvolatile write command (e.g., Write Data Register), the host can immediately initiate ACK polling by sending START + slave address; the device responds with ACK only after completing the internal 10ms EEPROM write cycle. This eliminates need for fixed delay timers and enables deterministic firmware synchronization during calibration updates.
How does cascade mode work across potentiometers in X9241AUSIT2, and what external connections are required?
In cascade mode, X9241AUSIT2 connects resistor arrays serially-e.g., VL1/RL1 of Pot1 must be wired to VH0/RH0 of Pot0. The CM bit (bit 7 of WCR) enables cascading per pot; only one wiper remains active (others disabled via DW bit), and wiper movement automatically crosses array boundaries. External wiring must connect all VH/RH, VL/RL, and VW/RW nodes as specified in Figure 9 of the datasheet. Cascading supports 2–4 arrays, enabling total resistance values from 4kΩ to 200kΩ without external components.
Can X9241AUSIT2 operate with negative voltages on its potentiometer terminals, and what is the safe range?
Yes, X9241AUSIT2 supports bipolar terminal operation: VH/RH, VL/RL, and VW/RW pins tolerate -3.0V to +5V referenced to VSS. This allows use in AC-coupled or dual-supply analog circuits-for example, trimming op-amp offsets with ±2.5V signals. However, the absolute voltage difference ΔV = |VH – VL| must not exceed 10V, and VCC must remain at +5V ±10%. Operation outside these bounds risks latch-up or permanent damage to the internal CMOS switches.
What happens to the wiper position of X9241AUSIT2 after power cycling, and how is it restored?
On power-up, X9241AUSIT2 automatically loads the contents of Data Register 0 (DR0) for each potentiometer into its corresponding volatile Wiper Counter Register (WCR), restoring the last-saved wiper position. This recall occurs within 1ms (tPUR) and requires no host intervention. To preserve a specific setting, firmware must explicitly write that value to DR0 before power-down-or use Global XFR WCR to Data Register to capture all four positions simultaneously. DR0 is nonvolatile and retains data for 100 years.
X9241AUSIT2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 64
- Resistance (Ohms):
- 50k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±300ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-SOIC
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 40
X9241AUSIT2 FAQ
1.How can I place an order for X9241AUSIT2 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9241AUSIT2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for X9241AUSIT2 reliable?
The price and inventory of X9241AUSIT2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9241AUSIT2 is usually 5 days.
3.What payment methods are accepted for X9241AUSIT2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9241AUSIT2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9241AUSIT2?
X9241AUSIT2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9241AUSIT2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for X9241AUSIT2?
For technical support, including X9241AUSIT2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9241AUSIT2 requirements.
6.How does Aetrix verify that X9241AUSIT2 is sourced from the original manufacturer or authorized distributors?
All X9241AUSIT2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that X9241AUSIT2 meets industry standards.
7.What is the process for return or replacement of X9241AUSIT2?
All X9241AUSIT2 units undergo pre-shipment inspection (PSI). If there is an issue with X9241AUSIT2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The X9241AUSIT2 part is unused and in its original packaging.
Return procedure for X9241AUSIT2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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