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Renesas X9317US8I-2.7
- Part No.:
- X9317US8I-2.7
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9317US8I-2.7.pdf
- Description:
- IC DGTL POT 50KOHM 100TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,168
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Product details
Overview
X9317US8I-2.7 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 serial interface for precise voltage or current trimming in analog signal paths.
For engineers reviewing the X9317US8I-2.7 datasheet, X9317US8I-2.7 pinout, X9317US8I-2.7 application, or X9317US8I-2.7 equivalent, this device serves as a solid-state replacement for mechanical potentiometers in precision biasing, gain/offset adjustment, and regulator feedback networks where power-up repeatability and long-term stability are required.
Technical Context
The X9317US8I-2.7 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 discrete wiper positions, with position stored in nonvolatile memory and recalled automatically at power-up.
Control is executed via three dedicated digital inputs: CS (chip select), U/D (direction), and INC (edge-triggered increment). The device supports both three-terminal potentiometer (voltage divider) and two-terminal variable resistor (current control) configurations, with RH, RL, and RW terminals electrically isolated from logic supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end resistance (RTOTAL) | 50 kΩ ±20% - defines full-scale analog range and sets minimum load impedance for stable voltage division |
| Supply voltage range | 2.7 V to 5.5 V - enables direct compatibility with 3.3 V and 5 V systems without level-shifting |
| Standby supply current | <5 µA - allows integration into battery-powered or low-power always-on circuits without significant quiescent drain |
| Wiper resistance (RW) | 400 Ω (typ.) at 2.7 V - contributes predictable series resistance in wiper path, critical for accuracy in current-sense or feedback applications |
| Resolution | 1% (1/99 step) - provides 100 discrete, monotonic tap positions for fine-grained analog tuning |
| Absolute linearity error | ±1 MI (Minimum Increment) - ensures maximum deviation of ≤1% of full-scale output across entire wiper range |
| Nonvolatile endurance | 100,000 data changes per bit - guarantees reliable field recalibration over product lifetime without wear-out failure |
Pinout & Package
Package: 8-lead SOIC (RoHS-compliant, M8.15E drawing), -40°C to +85°C industrial temperature 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 determines wiper movement direction during each INC transition |
| 3 - RH | High terminal | Fixed end of resistor array; connects to higher potential node in voltage divider configuration |
| 4 - VSS | Ground reference | Digital and analog ground return; must be low-impedance for stable wiper operation |
| 5 - RW | Wiper terminal | Movable contact point; output node whose voltage or resistance varies with tap position |
| 6 - RL | Low terminal | Fixed end of resistor array; connects to lower potential node (e.g., ground or reference) |
| 7 - CS | Chip select input | Active-low enable; HIGH initiates nonvolatile store when INC is also HIGH |
| 8 - VCC | Power supply | 2.7–5.5 V digital/analog supply; powers logic, memory, and resistor array simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper position storage | Retains last-set tap position across power cycles; eliminates need for external EEPROM or MCU initialization code |
| Temperature-compensated resistor array | ±300 ppm/°C total resistance drift - maintains stable RTOTAL over industrial temperature range |
| Make-before-break wiper switching | Prevents open-circuit transients during tap transitions; avoids glitches in sensitive amplifier feedback paths |
| Low-noise performance | -120 dBV (ref. 1 kHz) - suitable for audio bias, sensor conditioning, and precision reference trimming |
| Ratiometric temperature coefficient | ±20 ppm/°C - ensures stable voltage division ratio independent of temperature-induced resistance drift |
Applications
| LCD Bias Control | Laser Diode Bias Control |
|---|---|
Use Scenario: Adjusting VCOM or gamma reference voltages in TFT-LCD driver ICs to compensate for panel variation and aging. IC Role / Device Role / Timing Role: Three-terminal potentiometer providing programmable DC bias voltage to LCD column drivers. Use Value: Enables factory calibration and dynamic contrast tuning without mechanical trimmers; nonvolatile recall ensures consistent startup brightness. |
Use Scenario: Setting precise bias current for laser diode anode in optical transceivers or fiber modules. IC Role / Device Role / Timing Role: Two-terminal variable resistor in constant-current source feedback loop controlling laser drive strength. Use Value: Delivers stable, repeatable current setpoint across temperature and life cycle; low wiper noise prevents optical output ripple. |
| Voltage Regulator Output Control | Gain and Offset Trim |
Use Scenario: Adjusting feedback divider ratio in adjustable LDOs or DC-DC converters to achieve target output voltage. IC Role / Device Role / Timing Role: Three-terminal potentiometer replacing fixed resistors in regulator feedback network. Use Value: Allows post-manufacture voltage calibration and field firmware updates; 50 kΩ RTOTAL minimizes loading on error amplifier input. |
Use Scenario: Calibrating offset null and gain scaling in instrumentation amplifiers or ADC front-ends. IC Role / Device Role / Timing Role: Two-terminal variable resistor in op-amp offset null circuit or gain-setting network. Use Value: Achieves sub-1% trimming resolution with no mechanical drift; ratiometric tempco preserves calibration across operating temperature. |
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 | I²C interface, 256-tap resolution, 50 kΩ, 2.7–5.5 V, ±8% RTOTAL tolerance | Requires I²C host controller; tighter resistance tolerance but no auto-recall on power-up | Choose for systems with existing I²C infrastructure and need for finer resolution; requires explicit restore command after power cycle |
| MCP45HV51-503 | Up/down interface, 256-tap resolution, 50 kΩ, 4.5–20 V supply, ±20% RTOTAL, volatile wiper | Higher voltage rating; no nonvolatile storage - wiper resets to mid-scale on power-up | Choose for high-voltage analog circuits (>5.5 V) where volatile operation is acceptable and external MCU handles initialization |
Compared with AD5175BRMZ-50 and MCP45HV51-503, the X9317US8I-2.7 uniquely combines 3-wire simplicity, guaranteed power-up repeatability via nonvolatile recall, and industrial-temperature-rated 50 kΩ resistance - making it optimal for cost-sensitive, self-initializing analog trim applications without I²C or high-voltage requirements.
Availability
X9317US8I-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator feedback, and precision gain/offset trimming requiring stable component supply, long-term calibration retention, and industrial-temperature operation.
Supply support for X9317US8I-2.7 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 IoT applications.
The X9317 family was designed specifically for solid-state replacement of mechanical potentiometers in analog trimming applications demanding nonvolatile setting retention, low power, and high reliability across extended temperature ranges.
FAQ
What is the operating temperature range for the X9317US8I-2.7?
The X9317US8I-2.7 is rated for -40°C to +85°C, meeting industrial temperature requirements. This range is confirmed in the Ordering Information table (Page 2) and applies to all electrical specifications unless otherwise noted. The device maintains specified performance-including wiper resistance, linearity, and nonvolatile memory retention-across this full span.
Does the X9317US8I-2.7 retain its wiper position after power loss?
Yes, the X9317US8I-2.7 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is inherent to the device architecture and requires no external components or MCU intervention. Data retention is guaranteed for 100 years under normal operating conditions.
Can the X9317US8I-2.7 be used in a two-terminal variable resistor configuration?
Yes, the X9317US8I-2.7 supports two-terminal operation by connecting either RH or RL to RW and using the remaining terminal plus RW as the variable resistance pair. This configuration is explicitly validated in Figure 4 ("Two Terminal Variable Resistor") and referenced in the Applications section for current control tasks like laser diode biasing.
What is the maximum wiper current rating for the X9317US8I-2.7 at 2.7 V supply?
At VCC = 2.7 V, the maximum wiper current (IW) is ±4.4 mA, as specified in the Absolute Maximum Ratings table (Page 4). Exceeding this limit risks permanent damage to the internal wiper switches. For safe operation, ensure the voltage across RH–RL does not exceed the product of IW and RTOTAL (i.e., ≤220 mV).
How does the X9317US8I-2.7 differ from the standard X9317US8Z-2.7 variant?
The X9317US8I-2.7 features an industrial-grade temperature range (-40°C to +85°C), while the X9317US8Z-2.7 is commercial-grade (0°C to +70°C). Both share identical electrical specs, pinout, package (8-lead SOIC), and functionality-but only the "I" suffix guarantees full-spec operation across the extended industrial range.
X9317US8I-2.7 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:
- 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-2.7 FAQ
1.How can I place an order for X9317US8I-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9317US8I-2.7 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-2.7 reliable?
The price and inventory of X9317US8I-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9317US8I-2.7 is usually 5 days.
3.What payment methods are accepted for X9317US8I-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9317US8I-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9317US8I-2.7?
X9317US8I-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9317US8I-2.7 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-2.7?
For technical support, including X9317US8I-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9317US8I-2.7 requirements.
6.How does Aetrix verify that X9317US8I-2.7 is sourced from the original manufacturer or authorized distributors?
All X9317US8I-2.7 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-2.7 meets industry standards.
7.What is the process for return or replacement of X9317US8I-2.7?
All X9317US8I-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with X9317US8I-2.7, 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-2.7 part is unused and in its original packaging.
Return procedure for X9317US8I-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9317US8I-2.7 Tags
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