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Renesas X9C102ST1
- Part No.:
- X9C102ST1
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X9C102ST1.pdf
- Description:
- IC DGTL POT 1KOHM 100TAP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
X9C102ST1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 wiper tap points, ±20% end-to-end resistance tolerance, nonvolatile wiper position storage, and 5V CMOS operation. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning, power supply feedback loops, and precision calibration circuits.
For engineers reviewing the X9C102ST1 datasheet, X9C102ST1 pinout, X9C102ST1 application, or X9C102ST1 equivalent, key selection criteria include its 1kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, 40Ω typical wiper resistance, 750µA max standby current, and compatibility with standard 3-wire serial control interfaces for embedded trimming and remote adjustment.
Technical Context
The X9C102ST1 integrates a 7-bit up/down counter, nonvolatile memory for wiper position retention, and a make-before-break wiper switching network across 99 resistive elements. Its internal charge pump enables ±5V terminal voltage operation while powered from a single 5V supply.
Wiper movement is controlled via negative-edge-triggered INC, level-sensitive U/D, and active-low CS inputs. A store operation occurs when CS transitions HIGH while INC is HIGH, writing the current wiper position to EEPROM with 100-year data retention and 100,000-cycle endurance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 1kΩ ±20% - defines full-scale analog range and load interaction in voltage divider or current-setting configurations |
| Wiper Tap Points | 100 positions - provides 1% resolution for fine-grained analog parameter adjustment |
| Supply Voltage | 5V ±10% - compatible with standard digital logic rails and eliminates need for auxiliary supplies |
| Standby Current | 750µA max - enables low-power operation during system sleep modes without losing trim state |
| Terminal Voltage Range | ±5V on VH/RH and VL/RL - supports bipolar signal handling without external level-shifting circuitry |
| Wiper Resistance | 40Ω typical - minimizes insertion error in precision gain-setting and offset-nulling applications |
| Temperature Coefficient | ±600 ppm/°C - specifies resistance drift over industrial temperature range, critical for stable calibration |
Pinout & Package
Package: 8-lead SOIC (M8.15E footprint), RoHS-compliant, narrow-body plastic package with 1.27mm lead pitch and 5.0mm × 4.0mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INC | Increment clock input | Negative-edge-triggered control line; toggling moves wiper one step in direction set by U/D |
| 2 U/D | Up/Down direction control | Static logic level determines wiper increment (+) or decrement (–) on each INC edge |
| 3 VH/RH | High-side fixed terminal | One end of resistor array; accepts –5V to +5V; polarity label denotes relative position, not voltage sign |
| 4 VSS | Ground reference | Logic and analog ground return; must be connected before applying any other voltages |
| 5 VW/RW | Wiper output terminal | Movable contact point; series resistance ~40Ω affects accuracy in low-impedance feedback paths |
| 6 VL/RL | Low-side fixed terminal | Other end of resistor array; symmetric ±5V rating and labeling convention as VH/RH |
| 7 CS | Chip select | Active-low enable; HIGH with INC HIGH initiates nonvolatile store; LOW enables real-time wiper control |
| 8 VCC | Positive supply | 5V ±10% power rail; powers logic, memory, and internal charge pump for bipolar terminal operation |
Key Features
| Feature | Design Value |
|---|---|
| Solid-state construction | Eliminates mechanical wear, contact bounce, and vibration sensitivity inherent in electro-mechanical potentiometers |
| Nonvolatile wiper storage | Retains last-set position across power cycles-no external EEPROM or initialization firmware required |
| Three-wire serial interface | Uses only CS, U/D, and INC signals-no clock or data lines needed, minimizing MCU GPIO usage |
| Make-before-break switching | Prevents open-circuit transients during wiper movement, avoiding glitches in sensitive analog feedback paths |
| Charge pump architecture | Enables ±5V analog signal swing from single 5V supply-simplifies PCB layout and reduces BOM count |
Applications
| Audio Signal Level Control | DC Power Supply Feedback Trim |
|---|---|
|
Use Scenario: Adjusting volume or balance in consumer audio amplifiers with microcontroller-based user interface. IC Role / Device Role / Timing Role: Replaces mechanical potentiometer as programmable voltage divider in analog signal path. Use Value: Enables remote/software-controlled gain setting, factory calibration storage, and elimination of front-panel potentiometer openings. |
Use Scenario: Fine-tuning output voltage of adjustable DC-DC converters in telecom or industrial power modules. IC Role / Device Role / Timing Role: Digitally adjustable resistor in feedback divider network of voltage regulator ICs (e.g., LM317, TL431). Use Value: Supports post-manufacturing calibration, field firmware updates to correct aging drift, and multi-voltage SKU configuration from single hardware design. |
| Instrumentation Offset Nulling | Temperature Compensation Network |
|
Use Scenario: Nulling input offset voltage in precision op-amp circuits used in medical sensor front-ends or test equipment. IC Role / Device Role / Timing Role: Two-terminal variable resistor in op-amp offset null pin configuration (e.g., OP-07, LT1013). Use Value: Provides repeatable, non-drifting null setting with 100-step resolution and immunity to mechanical contamination or vibration. |
Use Scenario: Compensating thermistor-based temperature sensing circuits in HVAC controllers or battery management systems. IC Role / Device Role / Timing Role: Programmable element in resistor network that adjusts gain/offset vs. temperature curve per unit calibration. Use Value: Allows per-unit compensation coefficients to be stored in nonvolatile memory, improving system-level accuracy without custom hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5171BRMZ-10 | I²C interface, 64-tap resolution, 10kΩ nominal, 2.7–5.5V supply, no internal charge pump | Requires I²C master; limited to unipolar ±2.5V terminal swing; lower resolution than X9C102ST1's 100 taps | Choose when I²C bus availability and lower power (5µA standby) outweigh need for bipolar operation and higher resolution |
| MCP41HV51-103 | SPI interface, 257-tap resolution, 10kΩ nominal, 10–36V high-voltage operation, no nonvolatile store on power-up | Supports higher analog voltage ranges but requires external EEPROM or host-initiated restore after power cycle | Choose for high-voltage industrial sensors where 36V terminal rating is mandatory and host firmware can manage wiper recall |
Compared with AD5171BRMZ-10 and MCP41HV51-103, the X9C102ST1 delivers native bipolar ±5V analog handling, true power-on wiper recall without host intervention, and deterministic 3-wire timing-making it optimal for cost-sensitive, self-contained analog trimming in 5V embedded systems.
Availability
X9C102ST1 is available at Aetrix Electronics and suitable for audio equipment calibration, power supply feedback networks, instrumentation offset adjustment, and temperature compensation circuits requiring stable component supply and long-term parametric consistency.
Supply support for X9C102ST1 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 connectivity solutions for automotive, industrial, and IoT applications.
The X9C102ST1 belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) product line, designed specifically for replacing mechanical potentiometers in embedded analog trimming, calibration, and parameter adjustment applications with enhanced reliability and programmability.
FAQ
What is the end-to-end resistance value of the X9C102ST1?
The X9C102ST1 has a nominal end-to-end resistance of 1kΩ with a tolerance of ±20%, as specified in the FN8222 datasheet. This value defines the total resistance between the VH/RH and VL/RL terminals and directly impacts voltage division ratios and current-setting accuracy in circuits using the X9C102ST1 as a programmable resistor.
Does the X9C102ST1 retain its wiper position after power loss?
Yes, the X9C102ST1 retains its wiper position in nonvolatile memory for up to 100 years and automatically recalls it on power-up. The wiper position is stored when CS transitions HIGH while INC is HIGH, and no external components or host firmware are required for this functionality-making the X9C102ST1 truly self-contained for calibration-critical applications.
What supply voltage does the X9C102ST1 require?
The X9C102ST1 operates from a single 5V supply with a recommended range of 5V ±10% (4.5V to 5.5V). Its internal charge pump allows the VH/RH and VL/RL terminals to handle ±5V analog signals even with this single supply, eliminating the need for dual-rail power in bipolar signal applications using the X9C102ST1.
How many wiper positions does the X9C102ST1 support?
The X9C102ST1 supports 100 discrete wiper positions across its 99-resistor-element array. Each position corresponds to a 1% increment of the end-to-end resistance, providing precise, repeatable analog adjustment without mechanical wear-key for long-life deployments of the X9C102ST1 in fielded equipment.
Is the X9C102ST1 RoHS-compliant and what package does it use?
Yes, the X9C102ST1 is RoHS-compliant and supplied in an 8-lead SOIC package conforming to outline drawing M8.15E. This narrow-body surface-mount package measures 5.0mm × 4.0mm with 1.27mm lead pitch, supporting automated assembly and meeting IPC/JEDEC MS-012 standards-ensuring reliable placement and reflow compatibility for the X9C102ST1 in high-volume manufacturing.
X9C102ST1 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):
- 1k
- Interface:
- Up/Down (U/D, INC, CS)
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±600ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
- Operating Temperature:
- 0°C ~ 70°C
- Resistance - Wiper (Ohms) (Typ):
- 40
X9C102ST1 FAQ
1.How can I place an order for X9C102ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9C102ST1 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 X9C102ST1 reliable?
The price and inventory of X9C102ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9C102ST1 is usually 5 days.
3.What payment methods are accepted for X9C102ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9C102ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9C102ST1?
X9C102ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9C102ST1 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 X9C102ST1?
For technical support, including X9C102ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9C102ST1 requirements.
6.How does Aetrix verify that X9C102ST1 is sourced from the original manufacturer or authorized distributors?
All X9C102ST1 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 X9C102ST1 meets industry standards.
7.What is the process for return or replacement of X9C102ST1?
All X9C102ST1 units undergo pre-shipment inspection (PSI). If there is an issue with X9C102ST1, 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 X9C102ST1 part is unused and in its original packaging.
Return procedure for X9C102ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9C102ST1 Tags
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MCP4018T-103E/LT
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MCP4018T-503E/LT
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MCP4011T-103E/SN
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MCP4018T-502E/LT
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MCP4017T-103E/LT
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MCP4531T-103E/MF
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MCP4021T-202E/SN
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MCP4023T-103E/CH
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MCP4022T-503E/CH
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MCP4551T-502E/MS
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