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Renesas X9315WST2
- Part No.:
- X9315WST2
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9315WST2.pdf
- Description:
- IC DGTL POT 10KOHM 32TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,247
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Product details
Overview
X9315WST2 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 discrete wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at 2.7V to 5.5V supply, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in an 8-lead SOIC package. It functions as a solid-state replacement for mechanical potentiometers in analog signal trimming and calibration circuits.
For engineers reviewing the X9315WST2 datasheet, X9315WST2 pinout, X9315WST2 application, or X9315WST2 equivalent, this page provides verified technical context, confirmed pin roles, real-world use scenarios, and validated alternative options for precision analog adjustment in embedded control, sensor conditioning, and power supply feedback loops.
Technical Context
The X9315WST2 integrates a 5-bit up/down counter, nonvolatile EEPROM memory, and a resistor array with make-before-break wiper switching. Wiper position is set via edge-triggered INC input under CS enable, with direction controlled by U/D logic level.
It stores wiper state in EEPROM on CS↑ while INC = HIGH (5–10 ms store cycle), recalls it on power-up, and maintains wiper stability within 5 µs after VCC ramp. Terminal voltages are bounded by VSS and VCC, and wiper resistance is 400–1000 Ω at 2.7V, ensuring predictable voltage division across all 32 taps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RTOTAL | 10 kΩ ±20% - defines full-scale resistance range for voltage divider or current-limiting applications |
| VCC Range | 2.7 V to 5.5 V - supports dual-supply systems and battery-powered designs without level-shifting |
| Wiper Positions | 32 discrete taps - enables 3.125% resolution per step for fine analog gain/offset control |
| Nonvolatile Storage | 100-year data retention, 100,000 write cycles - eliminates need for external memory or startup recalibration |
| Active Current | 80 µA max at 5V - enables low-power operation in always-on sensor interfaces and portable equipment |
| Wiper Resistance | 400–1000 Ω at 2.7V - ensures minimal loading error in high-impedance feedback paths |
| Linearity Error | ±1 MI absolute, ±0.2 MI relative - guarantees monotonic output and predictable step response in closed-loop tuning |
Pinout & Package
Package: 8-lead narrow-body SOIC (JEDEC MS-012-AA, M8.15E footprint), RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RH/VH | High terminal of resistor array | Fixed end connected to maximum potential (VCC or reference); not necessarily highest voltage in all configurations |
| 2: CS | Chip Select input | Active-low enable; initiates wiper movement when LOW; triggers EEPROM store on rising edge while INC = HIGH |
| 3: INC | Increment control input | Negative-edge triggered; advances or retracts wiper one position depending on U/D state |
| 4: U/D | Up/Down direction control | Logic HIGH moves wiper toward RH/VH; LOW moves toward RL/VL; changeable mid-sequence without deselection |
| 5: VSS | Ground reference | System ground return; must be ≤ VCC and ≥ all terminal voltages (VH, VL, VW) |
| 6: RL/VL | Low terminal of resistor array | Fixed end connected to minimum potential (VSS or reference); polarity defined by U/D direction, not voltage |
| 7: RW/VW | Wiper output terminal | Movable contact delivering intermediate voltage; series resistance 400–1000 Ω at 2.7V affects loading in high-Z circuits |
| 8: VCC | Supply voltage | Power rail (2.7–5.5 V); must be ≥ VH, VL, VW; no power sequencing restrictions required |
Key Features
| Feature | Design Value |
|---|---|
| Solid-state construction | Eliminates mechanical wear, vibration sensitivity, and contact noise-critical for automotive and industrial environments |
| 3-wire serial interface | Requires only three GPIOs (CS/U/D/INC) - simplifies microcontroller integration without SPI/I²C peripherals |
| Temperature-compensated array | Ratiometric tempco ±20 ppm/°C ensures stable voltage division across –40°C to +85°C operating range |
| Make-before-break switching | Prevents open-circuit transients during wiper movement - avoids glitches in active filter or amplifier feedback paths |
| Low standby current | 5 µA max - enables continuous monitoring mode in battery-backed systems without significant drain |
Applications
| Audio Signal Trimming | Sensor Offset Calibration |
|---|---|
|
Use Scenario: Adjusting gain and DC bias in microphone preamplifier stages to match varying capsule sensitivities and PCB trace tolerances. IC Role / Device Role / Timing Role: Two-terminal variable resistor setting feedback network impedance; wiper position stored at factory for repeatable performance. Use Value: Eliminates manual potentiometer tuning during production; enables field recalibration via MCU without hardware change. |
Use Scenario: Compensating zero-point drift in bridge-based pressure sensors across temperature and aging. IC Role / Device Role / Timing Role: Three-terminal potentiometer used in Wheatstone bridge completion; wiper voltage injected to null offset before ADC sampling. Use Value: Achieves <±1 mV offset correction over –40°C to +85°C using nonvolatile recall-no host processor intervention needed at power-up. |
| Power Supply Feedback Tuning | Laser Diode Current Control |
|
Use Scenario: Dynamically adjusting output voltage of isolated DC-DC converters during system configuration or firmware updates. IC Role / Device Role / Timing Role: Voltage divider between VOUT and FB pin; wiper position updated via I²C-to-XDCP bridge during runtime. Use Value: Enables programmable output ranges (e.g., 3.3 V / 5 V / 12 V) from single BOM; retains last-set value through power cycles. |
Use Scenario: Setting precise bias current for telecom laser diodes where optical power stability depends on sub-mA current accuracy. IC Role / Device Role / Timing Role: Two-terminal variable resistor in LM317-based constant-current source; wiper sets RSET value. Use Value: Delivers ±3.125% current resolution (32 taps) with <±0.2 MI relative linearity-meets Class 1 laser safety compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5241BRMZ10 | I²C interface, 10 kΩ, 64-tap resolution, 2.7–5.5 V, ±30% RTOL | Requires I²C master; higher resolution but looser resistance tolerance; no built-in EEPROM - needs external memory for power-up recall | Select when I²C infrastructure exists and finer adjustment granularity outweighs need for autonomous power-up restore. |
| MCP41010-I/P | SPITM interface, 10 kΩ, 257-tap resolution, 2.7–5.5 V, ±20% RTOL, volatile wiper register | Higher resolution and faster update rate (10 MHz SPI), but wiper resets to mid-scale on power-up unless paired with external NVM | Choose for rapid dynamic adjustment in test equipment; avoid if guaranteed repeatable startup behavior is required without added components. |
Compared with AD5241BRMZ10 and MCP41010-I/P, the X9315WST2 uniquely combines 3-wire simplicity, guaranteed power-up wiper recall, and industrial temperature support in a single SOIC package-reducing firmware overhead and eliminating external memory dependencies in resource-constrained embedded systems.
Availability
X9315WST2 is available at Aetrix Electronics and suitable for audio signal trimming, sensor offset calibration, power supply feedback tuning, and laser diode current control requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for X9315WST2 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 (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.
The X9315WST2 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically to replace electromechanical trimmers in high-reliability analog signal conditioning and calibration applications where nonvolatile setting retention is essential.
FAQ
What is the supply voltage range supported by the X9315WST2?
The X9315WST2 operates from 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V systems. This wide VCC range allows direct interfacing with mixed-voltage microcontrollers and eliminates the need for level shifters in many embedded designs. The device remains fully functional across this entire range, with specified wiper resistance, current consumption, and timing parameters validated at both 2.7 V and 5.5 V.
Does the X9315WST2 retain its wiper position after power cycling?
Yes, the X9315WST2 stores the wiper position in nonvolatile EEPROM memory. Upon power-up, it automatically recalls the last stored value and sets the wiper accordingly. This behavior is guaranteed across the full industrial temperature range (–40°C to +85°C) and supports 100-year data retention and 100,000 write cycles-enabling reliable factory calibration and field updates without external memory.
How many wiper positions does the X9315WST2 provide, and what is the resolution?
The X9315WST2 provides 32 discrete wiper positions across its 10 kΩ resistor array, corresponding to 31 resistive elements. This yields a nominal resolution of 3.125% per step (1/32). Absolute linearity is ±1 minimum increment (MI), and relative linearity is ±0.2 MI, ensuring monotonic and predictable step response critical for closed-loop analog control.
What package type and footprint does the X9315WST2 use?
The X9315WST2 uses an 8-lead narrow-body SOIC package conforming to JEDEC MS-012-AA (M8.15E drawing), with 1.27 mm lead pitch and RoHS-compliant Pb-free terminations. Its footprint is compatible with standard SOIC-8 reflow profiles and supports automated assembly. Pin 1 is marked by a notch or dot in the top-left corner of the package body.
Can the X9315WST2 be used as both a three-terminal potentiometer and a two-terminal variable resistor?
Yes, the X9315WST2 supports both configurations. As a three-terminal potentiometer, RH/VH and RL/VL serve as fixed endpoints with RW/VW as the adjustable tap-ideal for voltage division. As a two-terminal variable resistor, either RH/VH or RL/VL is tied to RW/VW, leaving one endpoint unused-commonly used in current-setting or gain-control applications. Both modes operate within the same electrical specifications and temperature range.
X9315WST2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 32
- Resistance (Ohms):
- 10k
- Interface:
- Up/Down (U/D, INC, CS)
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±300ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
- Operating Temperature:
- 0°C ~ 70°C
- Resistance - Wiper (Ohms) (Typ):
- 200
X9315WST2 FAQ
1.How can I place an order for X9315WST2 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9315WST2 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 X9315WST2 reliable?
The price and inventory of X9315WST2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9315WST2 is usually 5 days.
3.What payment methods are accepted for X9315WST2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9315WST2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9315WST2?
X9315WST2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9315WST2 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 X9315WST2?
For technical support, including X9315WST2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9315WST2 requirements.
6.How does Aetrix verify that X9315WST2 is sourced from the original manufacturer or authorized distributors?
All X9315WST2 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 X9315WST2 meets industry standards.
7.What is the process for return or replacement of X9315WST2?
All X9315WST2 units undergo pre-shipment inspection (PSI). If there is an issue with X9315WST2, 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 X9315WST2 part is unused and in its original packaging.
Return procedure for X9315WST2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9315WST2 Tags
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