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Renesas X9318WS8T1
- Part No.:
- X9318WS8T1
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9318WS8T1.pdf
- Description:
- IC DGTL POT 10KOHM 100TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
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Product details
Overview
X9318WS8T1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 10 kΩ end-to-end resistance with 100 wiper tap points, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates from 4.5–5.5 V, supports terminal voltages up to +8 V, and delivers ±1% absolute linearity for precision analog trimming in voltage regulator output control and LCD bias circuits.
For engineers reviewing the X9318WS8T1 datasheet, X9318WS8T1 pinout, X9318WS8T1 application, or X9318WS8T1 equivalent, key selection criteria include its 100-year data retention, 100,000-cycle endurance, SOIC-8 package compatibility, and temperature-compensated resistor array with ±300 ppm/°C RTOTAL coefficient.
Technical Context
The X9318WS8T1 integrates a 99-element resistor ladder with make-before-break electronic wiper switching, a 7-bit up/down counter, and nonvolatile memory for power-up recall. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction and CS enables selection or initiates store-on-high transitions.
It functions as either a three-terminal voltage divider (RH/RW/RL) or two-terminal variable resistor (RW–RL or RW–RH), with wiper resistance specified at 40–200 Ω and ratiometric temperature coefficient of ±20 ppm/°C-enabling stable gain/offset trim across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RTOTAL | 10 kΩ ±20% - defines full-scale resistance range for analog adjustment accuracy |
| Resolution | 1% - corresponds to 100 discrete wiper positions for fine-grained control |
| Terminal Voltage Range | 0 to +8 V - supports biasing in LCD, laser diode, and DC-DC feedback paths |
| VCC Supply | 4.5–5.5 V - compatible with standard 5 V logic and mixed-signal systems |
| Wiper Resistance | 40–200 Ω - impacts insertion loss and signal integrity in current-sensing configurations |
| Linearity Error | ±1% absolute, ±0.2% relative - ensures monotonicity and predictable transfer function |
| Data Retention | 100 years - eliminates need for external EEPROM or battery-backed RAM |
Pinout & Package
Package: 8-lead SOIC (150 mil), RoHS-compliant Pb-free plus anneal finish, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: INC | Increment clock input | Negative-edge-triggered control signal; toggling moves wiper one step in U/D direction |
| 2: U/D | Direction control input | Logic level selects wiper increment (+) or decrement (–) on each INC edge |
| 3: RH | High fixed terminal | One end of resistor array; voltage reference point for three-terminal divider operation |
| 4: VSS | Ground reference | Return path for supply and signal currents; must be low-impedance for noise immunity |
| 5: RW | Wiper terminal | Movable contact point; connects to selected tap via decoded counter output |
| 6: RL | Low fixed terminal | Other end of resistor array; completes voltage divider or variable resistor path |
| 7: CS | Chip select | Active-low enable; HIGH with INC HIGH stores current wiper position to NV memory |
| 8: VCC | Supply voltage | 5 V ±10% power source; powers logic, memory, and resistor array bias circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Solid-state construction | Eliminates mechanical wear, vibration sensitivity, and contact bounce in automated test equipment |
| Nonvolatile wiper storage | Recalls last-set position at power-up without host initialization-critical for unattended systems |
| Temperature-compensated array | ±300 ppm/°C RTOTAL drift enables stable trim over –40°C to +85°C operating range |
| Make-before-break switching | Prevents open-circuit transients during wiper movement-essential for closed-loop regulator stability |
| Low standby current | ≤1 mA at VCC = 5 V reduces quiescent power in battery-operated instrumentation |
Applications
| LCD Bias Control | Laser Diode Bias Control |
|---|---|
Use Scenario: Adjusting contrast and brightness in automotive infotainment displays under varying ambient temperatures. IC Role / Device Role / Timing Role: Three-terminal voltage divider setting bias voltage on LCD segment drivers. Use Value: Nonvolatile recall ensures consistent display settings after vehicle ignition cycle; ±1% linearity prevents visible grayscale distortion. | Use Scenario: Setting precise forward current for 850 nm VCSELs in fiber-optic transceivers. IC Role / Device Role / Timing Role: Two-terminal variable resistor in laser driver feedback loop controlling IF. Use Value: 100,000-cycle endurance supports factory calibration and field recalibration; 0–8 V terminal rating accommodates driver compliance voltage. |
| Voltage Regulator Output Trim | DC Bias Adjustment |
Use Scenario: Fine-tuning output of adjustable LDOs (e.g., LM317-based supplies) in medical sensor front-ends. IC Role / Device Role / Timing Role: Resistor network element in ADJ pin feedback divider. Use Value: ±20% RTOTAL tolerance allows design margin; ratiometric tempco minimizes output drift vs. reference voltage. | Use Scenario: Calibrating offset null in precision op-amp circuits (e.g., instrumentation amplifiers) during production test. IC Role / Device Role / Timing Role: Adjustable zero-point resistor in input stage compensation network. Use Value: 100-tap resolution enables <1 mV offset correction; 100-year data retention avoids re-trim during product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5243BRMZ10 | I²C interface, dual-channel, 256-tap resolution, 10 kΩ nominal, ±30% tolerance | Requires I²C host; higher resolution but looser resistance tolerance affects absolute accuracy | Select when dual independent pots or I²C bus integration is required; not drop-in for X9318WS8T1's 3-wire interface |
| MCP41010-I/P | SPITM interface, single-channel, 257-tap resolution, 10 kΩ nominal, ±20% tolerance, volatile wiper register | No nonvolatile storage-requires external controller to reload wiper position at power-up | Choose for SPI-based systems where host firmware manages state; lacks X9318WS8T1's autonomous power-up recall |
Compared with AD5243BRMZ10 and MCP41010-I/P, the X9318WS8T1 uniquely combines 3-wire simplicity, guaranteed nonvolatile recall, and temperature-compensated linearity-making it optimal for self-contained analog trim in industrial controls and embedded power systems where reliability and zero-host-initialization are critical.
Availability
X9318WS8T1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, and voltage regulator output trim requiring stable component supply, long-term calibration retention, and industrial-temperature operation.
Supply support for X9318WS8T1 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) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The X9318WS8T1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered for replacing mechanical trimpots in calibration-critical systems where long-term stability, shock resistance, and programmability are mandatory.
FAQ
What is the operating temperature range for the X9318WS8T1?
The X9318WS8T1 is rated for 0°C to +70°C ambient operation per its SOIC-8 ordering variant (X9318WS8). This range supports commercial and industrial-grade applications including display biasing and power supply trimming where extended thermal cycling is not required. The device maintains ±1% absolute linearity and ±300 ppm/°C RTOTAL drift across this span.
Does the X9318WS8T1 retain its wiper position after power cycling?
Yes, the X9318WS8T1 stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This behavior is guaranteed for 100 years and requires no external components or host intervention. The store operation is triggered by raising CS HIGH while INC is held HIGH-a hardware-only sequence that makes X9318WS8T1 ideal for maintenance-free analog calibration.
Can the X9318WS8T1 be used as a two-terminal variable resistor?
Yes, the X9318WS8T1 supports two-terminal operation between RW and either RH or RL. In this configuration, it functions as a digitally adjustable current-limiting or gain-setting resistor. Wiper resistance (40–200 Ω) and terminal voltage rating (0–8 V) must be observed; the device does not require connection to both RH and RL simultaneously for valid operation.
What is the maximum allowable voltage on the RH, RL, and RW terminals of the X9318WS8T1?
The absolute maximum voltage on RH, RL, and RW terminals is +10 V with respect to VSS, but the recommended operating range is 0 to +8 V. Exceeding +8 V risks violating the specified terminal voltage limit in normal operation and may degrade long-term reliability. The device's internal switches and resistor array are characterized for stable performance only within the 0–8 V range.
Is the X9318WS8T1 RoHS compliant?
Yes, the X9318WS8T1 is RoHS compliant. Its "Z" suffix variant (X9318WS8ZT1) explicitly denotes Pb-free plus anneal construction using 100% matte tin termination and RoHS-compliant molding compounds. All SOIC-8 variants-including X9318WS8T1-are manufactured to meet IPC/JEDEC J-STD-020 reflow standards for lead-free assembly.
X9318WS8T1 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):
- 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):
- 40
X9318WS8T1 FAQ
1.How can I place an order for X9318WS8T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9318WS8T1 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 X9318WS8T1 reliable?
The price and inventory of X9318WS8T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9318WS8T1 is usually 5 days.
3.What payment methods are accepted for X9318WS8T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9318WS8T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9318WS8T1?
X9318WS8T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9318WS8T1 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 X9318WS8T1?
For technical support, including X9318WS8T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9318WS8T1 requirements.
6.How does Aetrix verify that X9318WS8T1 is sourced from the original manufacturer or authorized distributors?
All X9318WS8T1 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 X9318WS8T1 meets industry standards.
7.What is the process for return or replacement of X9318WS8T1?
All X9318WS8T1 units undergo pre-shipment inspection (PSI). If there is an issue with X9318WS8T1, 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 X9318WS8T1 part is unused and in its original packaging.
Return procedure for X9318WS8T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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