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Renesas X9317US8I-2.7T2
- Part No.:
- X9317US8I-2.7T2
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9317US8I-2.7T2.pdf
- Description:
- IC DGTL POT 50KOHM 100TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,978
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Product details
Overview
X9317US8I-2.7T2 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 50 kΩ end-to-end resistance. It operates from 2.7 V to 5.5 V, consumes <5 µA standby current, and uses a 3-wire up/down interface for voltage divider or variable resistor applications in precision analog trimming.
For engineers reviewing the X9317US8I-2.7T2 datasheet, X9317US8I-2.7T2 pinout, X9317US8I-2.7T2 application, or X9317US8I-2.7T2 equivalent, this page delivers verified specifications, SOIC-8 package details, real-world use cases in LCD bias and regulator control, and two validated alternative parts with functional distinctions.
Technical Context
The X9317US8I-2.7T2 implements a 99-element resistor array with make-before-break wiper switching, enabling glitch-free tap transitions. Its 7-bit counter drives a decoder that selects one of 100 wiper positions, with position stored in nonvolatile memory on CS↑/INC↑ and recalled at power-up.
It supports three-terminal potentiometer (voltage divider) and two-terminal variable resistor (current control) configurations. Temperature-compensated design yields ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC, ensuring stable gain/offset trim across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end Resistance | 50 kΩ ±20% - sets full-scale voltage division range and load impedance matching capability |
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct compatibility with 3.3 V and 5 V systems without level-shifting |
| Wiper Tap Resolution | 100 positions (0–99) - provides 1% step resolution for fine analog adjustment |
| Standby Current | <5 µA - minimizes quiescent power in battery-powered or always-on bias circuits |
| Nonvolatile Storage | 100-year data retention, 100,000 write cycles - ensures reliable power-up to last-trimmed setting over product lifetime |
| Wiper Resistance | 200 Ω typical (at 5 V), 400 Ω typical (at 2.7 V) - defines minimum achievable series resistance in variable-resistor mode |
| Temperature Coefficient | ±300 ppm/°C (absolute), ±20 ppm/°C (ratiometric) - maintains linearity and ratio stability across industrial temperature range |
Pinout & Package
Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INC) | Increment clock input | Negative-edge-triggered control signal; toggling moves wiper up/down per U/D state |
| 2 (U/D) | Direction control input | Logic level determines wiper movement direction during INC transition |
| 3 (RH) | High terminal | Fixed end of resistor array; connects to higher-potential node in voltage divider |
| 4 (VSS) | Ground reference | System ground return for internal logic and resistor array |
| 5 (RW) | Wiper output | Movable terminal; delivers tapped voltage or adjustable resistance between RH and RL |
| 6 (RL) | Low terminal | Fixed end of resistor array; connects to lower-potential node (e.g., ground or negative rail) |
| 7 (CS) | Chip select | Active-low enable; HIGH initiates nonvolatile store when INC is also HIGH |
| 8 (VCC) | Supply voltage | Power input for CMOS logic and resistor array; supports 2.7–5.5 V operation |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial up/down interface | Eliminates need for SPI/I²C controllers; compatible with GPIO-only microcontrollers for low-pin-count trimming |
| Nonvolatile wiper position storage | Guarantees repeatable startup behavior without host MCU initialization overhead or external EEPROM |
| Temperature-compensated resistor array | Maintains ±1 MI absolute linearity and ±0.2 MI relative linearity across -40°C to +85°C for stable calibration |
| Low-power CMOS architecture | Enables continuous bias adjustment in energy-constrained systems (e.g., portable medical sensors, IoT nodes) |
| Make-before-break wiper switching | Prevents open-circuit transients during tap changes, critical for stable feedback loops in amplifier gain control |
Applications
| LCD Bias Control | DC Bias Adjustment |
|---|---|
Use Scenario: Setting precise VCOM voltage in TFT-LCD panels to minimize image flicker and improve grayscale uniformity. IC Role / Device Role / Timing Role: Three-terminal potentiometer providing adjustable DC reference voltage to panel driver ICs. Use Value: 100-tap resolution and ±20 ppm/°C ratiometric TC ensure consistent contrast across operating temperature range. |
Use Scenario: Calibrating input offset of op-amps in sensor front-ends to null thermal drift over time. IC Role / Device Role / Timing Role: Two-terminal variable resistor in op-amp feedback path for programmable DC offset cancellation. Use Value: Nonvolatile storage retains calibrated offset value across power cycles, eliminating recalibration routines. |
| Laser Diode Bias Control | Voltage Regulator Output Control |
Use Scenario: Fine-tuning constant-current source for laser diode drivers to maintain optical output power within safety limits. IC Role / Device Role / Timing Role: Adjustable current-sense resistor element in high-side current mirror configuration. Use Value: Low 200 Ω typical wiper resistance minimizes voltage drop and self-heating effects at 10–100 mA bias currents. |
Use Scenario: Dynamically adjusting output voltage of adjustable LDOs (e.g., LM317-based regulators) via feedback divider network. IC Role / Device Role / Timing Role: Upper leg of resistive divider, where RW and RH set VOUT = 1.25 V × (1 + RH/RW). Use Value: 50 kΩ RTOTAL enables standard 10–100 kΩ divider values while maintaining low sensitivity to parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5175BRMZ-50 | 256-tap I²C interface, 50 kΩ, ±30% RTOTAL tolerance, 100-year NV retention | Requires I²C bus and pull-up resistors; higher resolution but slower update rate (tCYC = 10 µs vs. 2 µs) | Select when system already uses I²C and requires finer than 1% step resolution |
| MCP41050-I/P | 256-tap SPI interface, 50 kΩ, ±20% RTOTAL, no NV memory (volatile only) | Needs host MCU to reinitialize wiper at every power-up; lacks autonomous recall capability | Select when cost sensitivity outweighs need for power-loss recovery and board space permits extra reset logic |
Compared with AD5175BRMZ-50 and MCP41050-I/P, the X9317US8I-2.7T2 uniquely combines 3-wire simplicity, guaranteed power-up recall, and sub-5 µA standby draw-making it optimal for low-pin-count, energy-sensitive trimming where deterministic startup behavior is mandatory.
Availability
X9317US8I-2.7T2 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator output adjustment, and precision DC offset trimming requiring stable component supply across industrial temperature ranges.
Supply support for X9317US8I-2.7T2 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 is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and enterprise applications.
The X9317US8I-2.7T2 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimpots in high-reliability analog trimming applications where long-term stability and nonvolatile recall are essential.
FAQ
What is the operating temperature range for the X9317US8I-2.7T2?
The X9317US8I-2.7T2 is rated for -40°C to +85°C operation, as confirmed by its "I" grade marking and ordering information in the FN8183 datasheet. This industrial temperature range ensures reliable performance in embedded systems exposed to extended thermal cycling, such as factory automation controllers and outdoor instrumentation where ambient conditions vary widely. The device maintains specified linearity and resistance tolerance across this full span.
Does the X9317US8I-2.7T2 require an external clock or microcontroller to retain its wiper position after power loss?
No. The X9317US8I-2.7T2 stores wiper position in on-chip nonvolatile memory and automatically recalls it at power-up without any external intervention. A store operation is triggered by raising CS while INC is HIGH; once stored, the value persists for 100 years and survives unlimited power cycles. This eliminates dependency on host firmware or backup power sources, making X9317US8I-2.7T2 ideal for maintenance-free calibration.
Can the X9317US8I-2.7T2 be used in a two-terminal variable resistor configuration?
Yes. The X9317US8I-2.7T2 supports both three-terminal potentiometer (RH–RW–RL) and two-terminal variable resistor (e.g., RW–RL or RH–RW) modes. In two-terminal use, RW and RL form an adjustable resistance ranging from near-zero (wiper at RL) to 50 kΩ (wiper at RH), with wiper resistance contributing ≤400 Ω at 2.7 V. This configuration is commonly applied in LED current limiting and amplifier gain-setting networks.
What is the maximum wiper current rating for the X9317US8I-2.7T2?
The X9317US8I-2.7T2 specifies a maximum wiper current (IW) of ±4.4 mA, as defined in the Absolute Maximum Ratings table. This limit applies regardless of supply voltage and must not be exceeded to avoid degradation of wiper switch reliability or resistance drift. For safe operation, users should ensure (V(RH) − V(RL)) / RTOTAL remains within ±4.4 mA - e.g., with 50 kΩ RTOTAL, differential voltage across RH–RL must stay ≤220 mV in variable-resistor mode.
How does the 3-wire interface of the X9317US8I-2.7T2 differ from SPI or I²C digital potentiometers?
The X9317US8I-2.7T2 uses a dedicated 3-wire up/down interface (CS, U/D, INC) instead of SPI or I²C protocols. This simplifies integration with resource-constrained MCUs by eliminating protocol overhead, address decoding, or clock stretching. Each INC edge moves the wiper one tap in the direction set by U/D, and CS controls selection and nonvolatile store - enabling deterministic, low-latency adjustments (2 µs cycle time) without software drivers or bus arbitration.
X9317US8I-2.7T2 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:
- 100
- Resistance (Ohms):
- 50k
- Interface:
- Up/Down (U/D, INC, CS)
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- 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):
- 400
X9317US8I-2.7T2 FAQ
1.How can I place an order for X9317US8I-2.7T2 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9317US8I-2.7T2 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-2.7T2 reliable?
The price and inventory of X9317US8I-2.7T2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9317US8I-2.7T2 is usually 5 days.
3.What payment methods are accepted for X9317US8I-2.7T2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9317US8I-2.7T2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9317US8I-2.7T2?
X9317US8I-2.7T2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9317US8I-2.7T2 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-2.7T2?
For technical support, including X9317US8I-2.7T2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9317US8I-2.7T2 requirements.
6.How does Aetrix verify that X9317US8I-2.7T2 is sourced from the original manufacturer or authorized distributors?
All X9317US8I-2.7T2 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-2.7T2 meets industry standards.
7.What is the process for return or replacement of X9317US8I-2.7T2?
All X9317US8I-2.7T2 units undergo pre-shipment inspection (PSI). If there is an issue with X9317US8I-2.7T2, 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-2.7T2 part is unused and in its original packaging.
Return procedure for X9317US8I-2.7T2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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