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Renesas X9317US8I
- Part No.:
- X9317US8I
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9317US8I.pdf
- Description:
- IC DGTL POT 50KOHM 100TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,595
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Product details
Overview
X9317US8I from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 wiper tap positions, nonvolatile wiper position storage, and 3-wire up/down serial interface. It operates from 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports voltage divider or variable resistor configurations in precision analog trimming applications.
For engineers reviewing the X9317US8I datasheet, X9317US8I pinout, X9317US8I application, or X9317US8I equivalent, this device is selected for DC bias adjustment, laser diode bias control, and voltage regulator output tuning where power-up repeatability, low standby current (<5 µA), and temperature-compensated linearity are required.
Technical Context
The X9317US8I integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its resistor array uses temperature-compensated elements yielding ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC.
Wiper movement follows make-before-break switching, with 1 µs typical wiper response time (tIW) and 2 µs minimum INC cycle time (tCYC). The device enters standby mode when CS is high, drawing ≤5 µA supply current while retaining stored wiper position for 100 years.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end Resistance | 50 kΩ ±20% - defines full-scale analog range and load interaction in voltage divider or current-limiting configurations |
| Wiper Tap Count | 100 positions - enables 1% resolution per step for fine-grained analog calibration |
| Supply Voltage Range | 2.7 V to 5.5 V - supports single-supply operation across industrial and commercial rails without level-shifting |
| Standby Current | <5 µA - minimizes system power budget during idle periods without losing wiper state |
| Nonvolatile Endurance | 100,000 data changes per bit - ensures long-term reliability in field-adjustable systems requiring frequent recalibration |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including automotive cabin and industrial control modules |
| Wiper Resistance | 200 Ω typical at 5 V - limits signal path error and thermal noise in precision gain/offset trim circuits |
| Relative Linearity Error | ±0.2 MI - maintains monotonicity and predictable step-size accuracy across full travel for closed-loop feedback |
Pinout & Package
Package: 8-lead SOIC (M8.15E), RoHS-compliant, narrow-body plastic package with 1.27 mm lead pitch and –40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INC) | Increment clock input | Negative-edge-triggered control signal; toggling moves wiper up/down based on U/D state |
| 2 (U/D) | Direction control input | Logic level selects wiper increment (+) or decrement (–) on each INC edge |
| 3 (RH) | High terminal | Fixed end of resistor array; connects to higher potential in voltage divider configuration |
| 4 (VSS) | Ground reference | Return path for all internal circuitry and external bias networks |
| 5 (RW) | Wiper terminal | Movable contact point; output node for adjustable voltage or current; 200 Ω typical series resistance |
| 6 (RL) | Low terminal | Fixed end of resistor array; connects to lower potential (e.g., ground) in voltage divider |
| 7 (CS) | Chip select | Active-low enable; stores wiper position to nonvolatile memory when deasserted with INC high |
| 8 (VCC) | Power supply | 2.7–5.5 V supply rail; powers logic, memory, and resistor array; requires local decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper storage | Retains last-set position across power cycles for repeatable startup behavior without host reinitialization |
| Temperature-compensated resistor array | ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC ensure stable voltage division over industrial temperature range |
| Make-before-break wiper switching | Prevents open-circuit transients during tap transitions, avoiding glitches in sensitive amplifier feedback paths |
| Low-power CMOS architecture | ≤5 µA standby current and 80 µA active current enable battery-powered or energy-constrained analog subsystems |
| Three-terminal potentiometer or two-terminal rheostat mode | Flexible connection options support both voltage divider (RH–RW–RL) and current-setting (RW–RL or RW–RH) topologies |
| RoHS-compliant packaging | 8-lead SOIC (M8.15E) meets lead-free soldering requirements and IPC/JEDEC J-STD-020 reflow profiles |
Applications
| LCD Bias Control | DC Bias Adjustment |
|---|---|
Use Scenario: Setting precise common-mode voltage and gamma correction voltages in TFT-LCD column drivers. IC Role / Device Role / Timing Role: Three-terminal potentiometer providing stable, programmable DC bias reference independent of supply drift. Use Value: Eliminates manual potentiometer replacement and enables factory calibration via digital interface, improving yield and reducing test time. |
Use Scenario: Calibrating offset voltage in instrumentation amplifiers or op-amp-based sensor signal chains. IC Role / Device Role / Timing Role: Two-terminal variable resistor in feedback or reference leg to null systematic DC errors. Use Value: Achieves <±0.2 MI relative linearity and retains calibrated offset after power cycling, enabling unattended long-term measurement stability. |
| Laser Diode Bias Control | Voltage Regulator Output Control |
Use Scenario: Adjusting constant-current source setpoint for laser diode driver ICs in optical transceivers. IC Role / Device Role / Timing Role: Precision rheostat in current-sense feedback loop to regulate output current with minimal thermal drift. Use Value: ±20 ppm/°C ratiometric TC ensures current stability over temperature, critical for maintaining optical output power within safety limits. |
Use Scenario: Dynamically setting output voltage of adjustable linear regulators (e.g., LM317) in programmable power supplies. IC Role / Device Role / Timing Role: Three-terminal potentiometer replacing mechanical trimmer in VOUT = 1.25V × (1 + R2/R1) + IadjR2 configuration. Use Value: Enables remote voltage programming and automatic recalibration without hardware modification or manual intervention. |
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, 10 kΩ, SPI interface, 256-tap resolution; no nonvolatile storage per channel | Requires external microcontroller to reload settings on power-up; better suited for multi-channel simultaneous adjustment | Select when multiple independent potentiometers are needed and host firmware can manage initialization |
| MCP41050-I/P | Single-channel, 50 kΩ, SPI interface, volatile wiper register only; no EEPROM storage | Needs continuous host communication to retain position; lacks power-cycle persistence | Choose for cost-sensitive, short-duration trimming where EEPROM wear-out or startup delay is unacceptable |
Compared with AD5204BRUZ10 and MCP41050-I/P, the X9317US8I uniquely combines single-channel simplicity, nonvolatile retention, 3-wire minimal interface, and industrial temperature rating-making it optimal for standalone, self-initializing analog calibration in embedded systems.
Availability
X9317US8I is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias adjustment, and voltage regulator output tuning requiring stable component supply, guaranteed RoHS compliance, and long-term industrial temperature operation.
Supply support for X9317US8I 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications.
The X9317 series is part of Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical trimmers in precision analog signal conditioning, bias control, and calibration-critical systems.
FAQ
What is the exact end-to-end resistance value and tolerance for X9317US8I?
The X9317US8I has a nominal end-to-end resistance (RTOTAL) of 50 kΩ with a tolerance of ±20%, as specified in the Ordering Information table on page 2 of the FN8183 Rev.10.01 datasheet. This value is confirmed for the "US8" suffix variant and applies across the full –40°C to +85°C operating temperature range.
Does X9317US8I retain its wiper position after power loss?
Yes, the X9317US8I stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This feature is intrinsic to the device architecture and requires no external components or host intervention-enabling repeatable startup behavior in systems like voltage regulators and laser drivers.
What package type and footprint does X9317US8I use?
The X9317US8I uses an 8-lead narrow-body SOIC package per JEDEC MS-012, designated M8.15E in Renesas documentation. It features 1.27 mm lead pitch, 3.90 mm body width, and is RoHS-compliant with matte tin plating compatible with both SnPb and Pb-free reflow processes.
How does the 3-wire interface of X9317US8I differ from SPI or I²C protocols?
The X9317US8I uses a dedicated 3-wire up/down interface (CS, U/D, INC) rather than SPI or I²C. It requires no clock polarity/phase configuration or address decoding-only edge-triggered INC pulses and a direction bit. This simplifies firmware implementation and reduces GPIO overhead compared to byte-oriented serial protocols.
Can X9317US8I operate from a 3.3 V supply?
Yes, the X9317US8I supports VCC from 2.7 V to 5.5 V, making it fully compatible with standard 3.3 V logic and supply rails. All electrical specifications-including 5 µA standby current, 100 kΩ wiper impedance, and 1 µs wiper response-are guaranteed across this full voltage range.
X9317US8I 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:
- 100
- Resistance (Ohms):
- 50k
- 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
X9317US8I FAQ
1.How can I place an order for X9317US8I through Aetrix?
Please submit a Request for Quotation (RFQ) for X9317US8I 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 X9317US8I reliable?
The price and inventory of X9317US8I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9317US8I is usually 5 days.
3.What payment methods are accepted for X9317US8I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9317US8I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9317US8I?
X9317US8I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9317US8I 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 X9317US8I?
For technical support, including X9317US8I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9317US8I requirements.
6.How does Aetrix verify that X9317US8I is sourced from the original manufacturer or authorized distributors?
All X9317US8I 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 X9317US8I meets industry standards.
7.What is the process for return or replacement of X9317US8I?
All X9317US8I units undergo pre-shipment inspection (PSI). If there is an issue with X9317US8I, 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 X9317US8I part is unused and in its original packaging.
Return procedure for X9317US8I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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