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Renesas X9318WP8IZ
- Part No.:
- X9318WP8IZ
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
X9318WP8IZ.pdf
- Description:
- IC DGTL POT 10KOHM 100TAP 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,945
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Product details
Overview
X9318WP8IZ 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 feedback paths and LCD bias circuits.
For engineers reviewing the X9318WP8IZ datasheet, X9318WP8IZ pinout, X9318WP8IZ application, or X9318WP8IZ equivalent, key selection criteria include its 100-year data retention, 100,000-cycle endurance, temperature-compensated resistor array, Pb-free SOIC-8 package, and compatibility with manual or microcontroller-based trim control without external DACs or EEPROM.
Technical Context
The X9318WP8IZ 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 edge-triggered INC signals synchronized by CS and direction-latched U/D inputs.
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 ≤200 Ω and ratiometric temperature coefficient of ±20 ppm/°C - enabling stable gain/offset adjustment across –40°C to +85°C without calibration drift compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-end resistance | 10 kΩ ±20% - sets full-scale analog range for bias, gain, and offset tuning circuits |
| Wiper resolution | 100 tap points (0–99) - provides 1% step resolution for fine analog control |
| Linearity error | ±1% absolute, ±0.2% relative - ensures predictable voltage division across operating temperature |
| Nonvolatile storage | 100 years data retention, 100,000 write cycles - eliminates need for external memory or startup initialization |
| Supply & power | VCC = 4.5–5.5 V; active current ≤3 mA, standby ≤1 mA - compatible with 5 V logic rails and low-power systems |
| Terminal voltage range | RH/RW/RL = 0 to +8 V vs. VSS - supports direct use in 5 V and 8 V analog signal chains without level shifting |
| Temperature range | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
Package: 8-lead SOIC (150 mil), RoHS-compliant Pb-free finish (annealed matte tin), JEDEC MS-012AC standard footprint.
| 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 | Latches wiper movement direction (up or down) during CS-active window |
| 3 - RH | High fixed terminal | One end of 10 kΩ resistor array; connects to higher-potential node in voltage divider |
| 4 - VSS | Ground reference | Logic and analog ground return; must be low-impedance for stable wiper operation |
| 5 - RW | Wiper terminal | Movable output node; series resistance ≤200 Ω enables low-distortion analog signal routing |
| 6 - RL | Low fixed terminal | Other end of resistor array; connects to lower-potential node or system ground |
| 7 - CS | Chip select | Active-low enable; HIGH with INC HIGH initiates nonvolatile store; HIGH alone enters standby |
| 8 - VCC | Supply voltage | 5 V ±10% digital/analog supply; powers control logic, memory, and resistor array bias |
Key Features
| Feature | Design Value |
|---|---|
| Solid-state potentiometer architecture | Eliminates mechanical wear, contact bounce, and environmental sensitivity of analog trim pots |
| 3-wire serial interface | Requires only CS, U/D, and INC - no clock or data lines needed; minimal GPIO overhead |
| Nonvolatile wiper position storage | Automatically recalls last-set tap on power-up - enables consistent startup behavior without host firmware intervention |
| Temperature-compensated resistor array | ±20 ppm/°C ratiometric TC ensures stable voltage division across –40°C to +85°C |
| Make-before-break wiper switching | Prevents open-circuit transients during tap transitions - critical for stable feedback loop operation |
Applications
| LCD Bias Control | Laser Diode Bias Control |
|---|---|
Use Scenario: Adjusting VCOM or gamma voltage in TFT-LCD panels to maintain grayscale fidelity and viewing angle consistency. IC Role / Device Role / Timing Role: Three-terminal voltage divider setting precise DC bias levels at panel driver IC inputs. Use Value: Enables factory calibration and field-adjustable gamma tuning without soldered trimmers or rework. |
Use Scenario: Setting precise bias current for laser diode drivers in optical transceivers and fiber modules. IC Role / Device Role / Timing Role: Two-terminal variable resistor in current-sense feedback path of constant-current source. Use Value: Delivers 100-step resolution and nonvolatile recall to maintain calibrated optical output power after power cycling. |
| Voltage Regulator Output Trim | DC Offset/Gain Adjustment |
Use Scenario: Fine-tuning output voltage of adjustable LDOs or switching regulators (e.g., LM317, LT308x) in power management subsystems. IC Role / Device Role / Timing Role: Replaces mechanical pot in feedback divider network between VOUT and ADJ pins. Use Value: Supports remote digital calibration and dynamic output adjustment via MCU without hardware modification. |
Use Scenario: Calibrating input offset or closed-loop gain in instrumentation amplifiers, op-amp filters, and sensor signal conditioners. IC Role / Device Role / Timing Role: Precision voltage divider in op-amp feedback or reference leg to set gain/offset coefficients. Use Value: Achieves ±0.2% relative linearity and <500 µs wiper settling - suitable for 12-bit system accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5241BRMZ10 | Single-channel, I²C interface, 10 kΩ, 256 taps, ±30% RTOTAL tolerance | Requires I²C bus and pull-up resistors; lacks native power-up recall (needs external init) | Preferred when I²C infrastructure exists and higher resolution (256 steps) outweighs nonvolatile recall requirement |
| MCP41010-I/P | Single-channel, SPI interface, 10 kΩ, 256 taps, volatile wiper register, requires external MCU-initiated restore | No built-in nonvolatile memory; wiper resets to mid-scale on power-up unless host reloads value | Chosen for SPI-based systems where deterministic startup state is managed by firmware and higher resolution is prioritized |
Compared with AD5241BRMZ10 and MCP41010-I/P, the X9318WP8IZ uniquely combines 100-year nonvolatile storage, 3-wire minimal-interface control, and ±1% absolute linearity - making it optimal for unattended, calibration-critical analog trimming where power-cycle reliability is mandatory.
Availability
X9318WP8IZ 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 integrity, and industrial temperature operation.
Supply support for X9318WP8IZ 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 U.S.-based analog and mixed-signal semiconductor company specializing in high-performance power management, precision analog, and interface solutions.
The X9318WP8IZ belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical trimmers in calibration-sensitive analog circuits while delivering long-term stability, digital configurability, and zero-maintenance operation.
FAQ
What is the power-up behavior of the X9318WP8IZ?
The X9318WP8IZ automatically recalls the last stored wiper position from nonvolatile memory within 500 µs after VCC reaches regulation. No external initialization is required - the device is immediately functional as a 10 kΩ potentiometer with the previously saved tap setting, ensuring repeatable analog performance across power cycles without host MCU involvement.
Does the X9318WP8IZ require an external clock or data line for communication?
No. The X9318WP8IZ uses a self-timed 3-wire interface with only CS, U/D, and INC signals - no clock or serial data line is needed. Wiper movement is controlled by toggling INC while CS is low and U/D sets direction, simplifying integration into GPIO-constrained microcontrollers and eliminating timing-critical clock synchronization.
Can the X9318WP8IZ be used with supply voltages other than 5 V?
The X9318WP8IZ is specified for VCC = 4.5–5.5 V and supports RH/RW/RL terminal voltages up to +8 V versus VSS. It must be powered from a regulated 5 V rail; using VCC outside this range risks violating absolute maximum ratings and invalidates all parametric guarantees including linearity, endurance, and memory retention.
How is nonvolatile storage triggered on the X9318WP8IZ?
Nonvolatile storage is initiated when CS transitions from LOW to HIGH while INC is held HIGH. This single-edge event writes the current wiper position to memory. If CS goes HIGH while INC is LOW, the device enters standby mode without storing - allowing temporary adjustments that revert on next power-up.
What is the maximum allowable voltage across RH and RL terminals of the X9318WP8IZ?
The X9318WP8IZ allows up to +8 V across RH and RL terminals with respect to VSS (GND), as confirmed by the Absolute Maximum Rating of +10 V on RH/RW/RL and the operational specification VRH/RL = 0 to +8 V. Exceeding +8 V violates the recommended operating conditions and may degrade linearity or accelerate wear.
X9318WP8IZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-PDIP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 40
X9318WP8IZ FAQ
1.How can I place an order for X9318WP8IZ through Aetrix?
Please submit a Request for Quotation (RFQ) for X9318WP8IZ 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 X9318WP8IZ reliable?
The price and inventory of X9318WP8IZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9318WP8IZ is usually 5 days.
3.What payment methods are accepted for X9318WP8IZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9318WP8IZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9318WP8IZ?
X9318WP8IZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9318WP8IZ 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 X9318WP8IZ?
For technical support, including X9318WP8IZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9318WP8IZ requirements.
6.How does Aetrix verify that X9318WP8IZ is sourced from the original manufacturer or authorized distributors?
All X9318WP8IZ 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 X9318WP8IZ meets industry standards.
7.What is the process for return or replacement of X9318WP8IZ?
All X9318WP8IZ units undergo pre-shipment inspection (PSI). If there is an issue with X9318WP8IZ, 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 X9318WP8IZ part is unused and in its original packaging.
Return procedure for X9318WP8IZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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