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Renesas X9315WSI
- Part No.:
- X9315WSI
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9315WSI.pdf
- Description:
- IC DGTL POT 10KOHM 32TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,031
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Product details
Overview
X9315WSI from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at 5V ±10%, 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 precision analog trimming applications.
For engineers reviewing the X9315WSI datasheet, X9315WSI pinout, X9315WSI application, or X9315WSI equivalent, this page provides verified technical context, confirmed pin roles, real-world use scenarios, validated alternatives, and supply-ready availability details - all grounded in FN8179 Rev.2.00 and official ordering data.
Technical Context
The X9315WSI uses a 5-bit up/down counter driving a 32-position decoder to select one of 32 wiper taps across a monolithic 31-resistor ladder. Wiper position is stored in nonvolatile EEPROM upon CS↑ while INC = HIGH, enabling power-up recall without external memory.
Its 3-wire interface operates with make-before-break switching, ensuring continuity during wiper transitions. Terminal voltage range spans 0 to VCC, wiper resistance is 200 Ω (typ.) at 5V, and absolute linearity error is limited to ±1 MI (minimum increment), supporting stable analog control in closed-loop systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RTOTAL | 10 kΩ - fixed end-to-end resistance value defining full-scale analog range and current handling (±3.75 mA max). |
| Wiper Positions | 32 taps - enables 31-step resolution (≈3.1% per step) for fine-grained analog adjustment without DAC or microcontroller. |
| VCC Range | 5 V ±10% - compatible with standard 5V logic and analog rails; not rated for 2.7V operation (X9315WSI-2.7 variants exist separately). |
| Nonvolatile Storage | 100-year data retention, 100,000 write cycles - ensures reliable factory calibration or user trim settings survive decades and repeated field updates. |
| Temp Range | –40°C to +85°C - qualified for industrial environments where thermal drift must be mitigated via ratiometric design (±20 ppm/°C ratiometric TC). |
| Active Current | 80 µA max - ultra-low active power enables battery-operated or energy-sensitive analog front-ends without burdening supply. |
| Standby Current | 5 µA max - allows continuous presence on bias rails with negligible quiescent drain during system sleep modes. |
Pinout & Package
Package: 8-lead narrow-body SOIC (JEDEC MS-012-AA, pkg drawing M8.15E), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RH/VH | High terminal | Fixed end of resistor array; connects to maximum potential (VCC) in voltage divider mode; not internally clamped. |
| 2: RW/VW | Wiper terminal | Movable contact point; output node for variable voltage/current; series resistance ≈200 Ω at 5V affects loading in high-impedance circuits. |
| 3: RL/VL | Low terminal | Fixed end of resistor array; connects to minimum potential (VSS/GND); defines reference for wiper voltage division. |
| 4: VSS | Ground | Primary substrate reference; all internal logic and analog circuitry referenced to this node; must be low-impedance. |
| 5: VCC | Supply voltage | Power rail for digital control logic and analog array; must be ≥ VH, VL, VW; ramp rate limited to 0.2–50 V/ms. |
| 6: U/D | Up/Down direction control | Defines wiper movement direction on each INC edge; state may change dynamically during CS = LOW for bidirectional scanning. |
| 7: INC | Increment clock input | Negative-edge-triggered; toggling moves wiper one position; HIGH during CS↑ initiates nonvolatile store sequence. |
| 8: CS | Chip Select | Active-low enable; device enters standby when CS = HIGH and INC = LOW; stores wiper position when CS↑ while INC = HIGH. |
Key Features
| Feature | Design Value |
|---|---|
| Solid-state potentiometer | Eliminates mechanical wear, vibration sensitivity, and contact noise-enabling >100k adjustments vs. ~20k for typical mechanical pots. |
| 3-wire serial interface | Requires only three GPIOs (CS/U/D/INC) - no SPI/I²C peripheral needed; simplifies MCU integration in resource-constrained designs. |
| Nonvolatile wiper recall | Restores last-trimmed setting at power-on - critical for factory-calibrated sensors, audio gain stages, and medical instrument offsets. |
| Temperature-compensated array | Ratiometric tempco of ±20 ppm/°C ensures stable voltage division ratio across –40°C to +85°C, independent of absolute RTOTAL drift. |
| Low-power CMOS operation | 80 µA active / 5 µA standby enables always-on analog tuning in portable or IoT edge nodes without compromising battery life. |
Applications
| Audio Signal Level Control | Laser Diode Bias Adjustment |
|---|---|
|
Use Scenario: Adjusting gain in a microphone preamplifier stage to match varying sensor sensitivities or prevent ADC clipping. IC Role / Device Role / Timing Role: Acts as a two-terminal variable resistor in series with feedback path of op-amp; no timing function required. Use Value: Enables software-controlled, repeatable gain calibration without manual potentiometer rework or external DAC+buffer circuitry. |
Use Scenario: Fine-tuning bias current for a laser diode in optical transceivers to maintain constant optical output power over temperature. IC Role / Device Role / Timing Role: Functions as three-terminal potentiometer in current-setting network of LM317-based regulator; no real-time timing dependency. Use Value: Provides factory-set, nonvolatile bias that survives power cycling - eliminating need for recalibration after cold start or firmware update. |
| Industrial Sensor Offset Calibration | Programmable Voltage Reference Divider |
|
Use Scenario: Compensating zero-point drift in a pressure transducer signal chain before analog-to-digital conversion. IC Role / Device Role / Timing Role: Used as adjustable voltage divider between reference and ground to inject precise offset into instrumentation amplifier input. Use Value: Delivers ±1 MI absolute linearity (≈0.32 mV at 10V span) for sub-0.1% calibration accuracy across industrial temperature range. |
Use Scenario: Generating a programmable 1.25–4.75 V reference from a 5V supply for ADC reference or comparator threshold setting. IC Role / Device Role / Timing Role: Configured as three-terminal potentiometer with RH = VCC, RL = GND, RW = output; static DC function only. Use Value: Offers 32 discrete, stable, and repeatable reference points without requiring external resistors or trimming during production test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5204BRUZ10 | Quad-channel, I²C interface, 10 kΩ, ±30% RTOTAL tolerance, 200 kΩ wiper resistance. | Supports multiple independent channels but lacks single-device nonvolatile recall per channel; higher wiper R limits low-voltage precision. | Select when multi-pot integration reduces board space; avoid if single-channel power-up repeatability is mandatory. |
| MCP41010-I/P | Single-channel, SPI interface, 10 kΩ, ±20% RTOTAL, volatile wiper register (no EEPROM), 125 Ω wiper R. | No automatic power-up restore; requires host MCU to reload setting at boot; lower wiper R improves low-voltage linearity. | Choose for cost-sensitive, MCU-managed systems where firmware handles initialization; not suitable for standalone or brown-out resilience. |
Compared with AD5204BRUZ10 and MCP41010-I/P, the X9315WSI uniquely combines single-channel simplicity, guaranteed power-up recall, and industrial temperature rating - making it optimal for unattended, calibration-critical analog subsystems where EEPROM persistence outweighs interface flexibility.
Availability
X9315WSI is available at Aetrix Electronics and suitable for industrial sensor calibration, laser diode biasing, and audio signal conditioning requiring stable component supply, long-term calibration integrity, and RoHS-compliant packaging.
Supply support for X9315WSI 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 X9315WSI belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically to replace electromechanical potentiometers in applications demanding long-term stability, programmability, and nonvolatile setting retention.
FAQ
What is the operating voltage range for the X9315WSI?
The X9315WSI is specified for VCC = 5 V ±10% (4.5 V to 5.5 V) per FN8179 Rev.2.00. It is not rated for 2.7 V operation - that functionality is provided by separate part numbers such as X9315WSI-2.7T1. Applying voltages outside this range may cause undefined behavior or damage the X9315WSI.
Does the X9315WSI retain its wiper position after power loss?
Yes, the X9315WSI stores the wiper position in nonvolatile EEPROM. When CS transitions HIGH while INC is HIGH, the current counter value is written to memory. Upon subsequent power-up, the X9315WSI automatically recalls that stored value and sets the wiper accordingly - a core feature confirmed in the "Principles of Operation" section of the X9315WSI datasheet.
What is the maximum wiper current rating for the X9315WSI?
The X9315WSI has a maximum wiper current (IW) rating of ±3.75 mA under recommended operating conditions. Exceeding this limit risks localized heating, resistance drift, or long-term reliability degradation. This value is derived from the 10 mW maximum power rating and the 10 kΩ RTOTAL, and is explicitly stated in the "Recommended Operating Conditions" table for the X9315WSI.
Is the X9315WSI pin-compatible with other X9315 variants like X9315WMIZ or X9315WST1?
Yes - all X9315 family members, including X9315WSI, share identical 8-lead SOIC pinout (M8.15E), same terminal assignments (RH/VH, RW/VW, RL/VL, VSS, VCC, U/D, INC, CS), and identical functional block diagram. Differences lie only in RTOTAL (10kΩ), temperature grade (–40°C to +85°C), and packaging (Pb-free status), not pin configuration or interface protocol.
What does the 'I' suffix in X9315WSI indicate?
The 'I' in X9315WSI denotes the industrial temperature grade (–40°C to +85°C), as confirmed in the Ordering Information table on page 2 of FN8179 Rev.2.00. It distinguishes this variant from commercial-grade versions (e.g., X9315WST1, 0°C to +70°C) and identifies its qualification for extended thermal operation - a key selection criterion for the X9315WSI in harsh-environment applications.
X9315WSI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 200
X9315WSI FAQ
1.How can I place an order for X9315WSI through Aetrix?
Please submit a Request for Quotation (RFQ) for X9315WSI 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 X9315WSI reliable?
The price and inventory of X9315WSI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9315WSI is usually 5 days.
3.What payment methods are accepted for X9315WSI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9315WSI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9315WSI?
X9315WSI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9315WSI 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 X9315WSI?
For technical support, including X9315WSI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9315WSI requirements.
6.How does Aetrix verify that X9315WSI is sourced from the original manufacturer or authorized distributors?
All X9315WSI 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 X9315WSI meets industry standards.
7.What is the process for return or replacement of X9315WSI?
All X9315WSI units undergo pre-shipment inspection (PSI). If there is an issue with X9315WSI, 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 X9315WSI part is unused and in its original packaging.
Return procedure for X9315WSI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9315WSI Tags
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MCP4018T-103E/LT
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MCP4018T-503E/LT
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MCP4011T-103E/SN
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MCP4018T-104E/LT
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MCP4017T-503E/LT
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MCP4018T-502E/LT
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MCP4017T-103E/LT
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MCP4531T-103E/MF
Microchip Technology
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MCP4021T-202E/SN
Microchip Technology
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MCP4023T-103E/CH
Microchip Technology
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MCP4022T-503E/CH
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MCP4551T-502E/MS
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