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Renesas X9420YS16
- Part No.:
- X9420YS16
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
X9420YS16.pdf
- Description:
- IC DGTL POT 2.5KOHM 64TAP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
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Product details
Overview
X9420YS16 from Intersil is a single-channel, SPI-compatible digitally controlled potentiometer (XDCP™) with 2.5 kΩ end-to-end resistance, 64-tap resolution, and nonvolatile storage for four wiper positions. It operates from 2.7V to 5.5V analog supplies (V+/V−) and 2.7V–5.5V system supply (VCC), supporting precision voltage divider and variable resistor configurations in analog signal conditioning circuits.
For engineers reviewing the X9420YS16 datasheet, X9420YS16 pinout, X9420YS16 application, or X9420YS16 equivalent, key selection criteria include its 2.5 kΩ resistor array tolerance (±20%), ±3 mA wiper current rating, 100,000-cycle endurance per register, and SOIC-16 package compatibility with legacy analog control layouts requiring stable, low-noise digital trimming.
Technical Context
The X9420YS16 implements a 63-segment CMOS resistor ladder with decoded 6-bit Wiper Counter Register (WCR) controlling one of 64 tap points via CMOS switches. Its SPI interface uses rising-edge clocking on SCK, supports daisy-chaining up to two devices via A0 address bit, and includes HOLD for serial pause without reset.
It integrates four 6-bit nonvolatile Data Registers (DR0–DR3) for persistent wiper position storage, with automatic DR0→WCR load at power-up. Nonvolatile writes require CS high-to-low transition and take up to 10 ms, while volatile WCR updates respond within 10 µs after instruction completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 2.5 kΩ ±20% - defines full-scale analog range and current handling in voltage divider or rheostat mode |
| Resolution | 64 taps - enables 1.56% step granularity for fine analog gain/offset adjustment |
| Voltage Ranges | V+ = +2.7V to +5.5V; V− = −5.5V to −2.7V - supports bipolar analog signal paths up to ±5.5V swing |
| Wiper Current Rating | ±3 mA - limits maximum load current when used as variable resistor or voltage divider output |
| Nonvolatile Endurance | 100,000 data changes per bit - ensures long-term reliability for field-updatable calibration settings |
| Standby Current | <1 µA - enables ultra-low-power operation in battery-backed or always-on analog subsystems |
| SPI Clock Frequency | Up to 2 MHz - allows fast host-controlled wiper updates without timing bottlenecks in real-time systems |
Pinout & Package
Package: 16-lead SOIC (300 mil), RoHS-compliant Pb-free plus anneal option available (M16.3 drawing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | System/digital supply | Power source for SPI interface logic; must ramp first during power-up sequencing |
| CS | Chip select | Active-low enable; HIGH places SO in high-impedance and enters standby mode |
| RL/VL | Potentiometer low terminal | Equivalent to mechanical potentiometer's counterclockwise end; connects to V− or ground reference |
| SI | Serial input | Data input latched on rising SCK edge; supports shared SO/SI bus via tri-state control |
| WP | Hardware write protect | LOW disables nonvolatile writes to Data Registers; volatile WCR updates remain enabled |
| VSS | System ground | Reference for digital logic; separate from analog V− but tied internally in most designs |
| V+ | Analog positive supply | Positive rail for resistor array; must be powered after VCC and before pot pins |
| NC | No connection | Pins 9 and 10 are unconnected; no internal bonding or function |
| A0 | Device address | LSB of slave address; enables dual-device SPI bus configuration |
| SO | Serial output | Push-pull data output clocked on falling SCK edge; compatible with shared-bus topology |
| HOLD | Serial communication pause | Pauses ongoing SPI transfer when pulled LOW with SCK LOW; resumes on HIGH |
| SCK | Serial clock | Rising edge latches SI; falling edge clocks SO; requires tWH/tWL ≥200 ns |
| NC | No connection | Pin 13 is unconnected; no internal bonding or function |
| V− | Analog negative supply | Negative rail for resistor array; must be applied before VH/VL/RW to prevent latch-up |
| RH/VH | Potentiometer high terminal | Equivalent to mechanical potentiometer's clockwise end; connects to V+ or positive reference |
| RW/VW | Wiper output | Variable tap point; output impedance ≤250 Ω at ±1 mA; drives op-amp inputs directly |
Key Features
| Feature | Design Value |
|---|---|
| Solid-state potentiometer architecture | Eliminates mechanical wear, contact bounce, and environmental drift-enabling 100-year data retention and 100,000-cycle endurance |
| Four nonvolatile data registers | Stores up to four independent wiper positions or system parameters without external EEPROM |
| Register-oriented SPI protocol | Supports direct read/write/transfer of wiper values with opcode-based instructions-reducing firmware overhead vs. bit-banged I²C |
| Low-noise analog performance | −140 dBV noise floor and ±0.2 MI relative linearity ensure precision in audio, sensor biasing, and instrumentation |
| Bipolar analog supply support | V+ and V− rails allow true dual-supply operation across ±2.7V to ±5.5V-critical for AC-coupled signal chains and op-amp interfaces |
Applications
| Audio Signal Level Control | Industrial Sensor Calibration |
|---|---|
|
Use Scenario: Adjusting gain and offset in microphone preamplifiers and line-level audio buffers. IC Role / Device Role / Timing Role: Acts as a digitally programmable voltage divider between op-amp stages to set precise gain ratios. Use Value: Enables factory and field calibration without manual trimmers; 64-tap resolution provides <1.6% step accuracy for consistent channel matching. |
Use Scenario: Compensating zero-point and span errors in pressure, temperature, and current-sense transducers. IC Role / Device Role / Timing Role: Functions as a two-terminal variable resistor in Wheatstone bridge or op-amp feedback networks. Use Value: Stores calibrated offsets in DR0–DR3 for multi-point correction; nonvolatile recall ensures accuracy after power cycles. |
| Programmable Power Supply Feedback | Medical Instrument Offset Adjustment |
|
Use Scenario: Dynamically setting output voltage in adjustable DC-DC converters and linear regulators. IC Role / Device Role / Timing Role: Replaces mechanical pot in feedback divider of LM317 or similar regulators to enable remote voltage programming. Use Value: 2.5 kΩ resistance matches standard regulator feedback networks; ±3 mA wiper rating safely handles typical divider currents. |
Use Scenario: Fine-tuning baseline voltage in ECG front-ends, EEG amplifiers, and pulse oximeter analog signal paths. IC Role / Device Role / Timing Role: Provides low-noise, low-drift wiper output to op-amp summing junctions for patient-specific offset nulling. Use Value: −140 dBV noise floor prevents injection of audible artifacts; 100-year data retention maintains calibration across device 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 |
|---|---|---|---|
| ISL22416 | 64-tap, 10 kΩ, SPI interface, same SOIC-16 package; lacks V− rail support (unipolar only) | Not suitable for bipolar analog signal paths requiring negative supply; limited to 0V–VCC operation | Select when only unipolar operation is needed and 10 kΩ impedance better matches existing feedback networks |
| ISL95311 | 256-tap, 10 kΩ, I²C interface, TDFN-8 package; higher resolution but no HOLD or WP pins | Requires I²C host interface; smaller footprint but no hardware write protection or serial pause capability | Choose for space-constrained designs needing finer resolution and I²C compatibility, accepting loss of SPI-specific features |
Compared with ISL22416 and ISL95311, the X9420YS16 uniquely supports true bipolar analog operation (±2.7V to ±5.5V), retains hardware write protection and serial pause functionality, and delivers verified 2.5 kΩ impedance ideal for low-current precision divider applications where unipolar alternatives fall short.
Availability
X9420YS16 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and medical instrument offset adjustment requiring stable component supply and long-term obsolescence management.
Supply support for X9420YS16 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 semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The X9420 series was designed as a drop-in solid-state replacement for mechanical potentiometers in analog control loops, emphasizing nonvolatile storage, low noise, and robust SPI interoperability for industrial and medical instrumentation.
FAQ
What is the exact end-to-end resistance value and tolerance of the X9420YS16?
The X9420YS16 has a nominal end-to-end resistance of 2.5 kΩ with a tolerance of ±20%, as specified in the Ordering Information table and confirmed in the Analog Characteristics section of the FN8195 datasheet. This value applies across the full operating temperature range (0°C to +70°C) and is measured between VH/RH and VL/RL terminals under standard conditions.
Does the X9420YS16 support bipolar analog operation, and what are the valid supply voltage ranges?
Yes, the X9420YS16 supports true bipolar analog operation. Its V+ supply accepts +2.7V to +5.5V, and its V− supply accepts −5.5V to −2.7V, enabling use in dual-rail analog signal paths. The VH/RH, VL/RL, and VW/RW pins operate within the V− to V+ range, allowing ±5.5V signal handling when both rails are fully applied.
How many nonvolatile wiper positions can be stored in the X9420YS16, and how are they accessed?
The X9420YS16 includes four 6-bit nonvolatile Data Registers (DR0–DR3), each capable of storing one wiper position. These registers are accessed via SPI using the Read Data Register and Write Data Register instructions. DR0 is automatically loaded into the volatile Wiper Counter Register (WCR) at power-up, ensuring default calibration state restoration.
What is the maximum wiper current rating for the X9420YS16, and why is this important in circuit design?
The X9420YS16 has a maximum wiper current rating of ±3 mA, as specified in the Analog Characteristics table. Exceeding this limit risks degradation of switch resistance and long-term reliability. This rating determines safe loading in voltage divider or rheostat configurations-e.g., limiting feedback resistor values in op-amp circuits to avoid exceeding ±3 mA through VW/RW.
Is the X9420YS16 pin-compatible with other members of the X9420 family, such as the X9420WS16?
Yes, the X9420YS16 shares identical pinout and package (16-lead SOIC) with all X9420 variants including X9420WS16. The primary difference lies in end-to-end resistance (2.5 kΩ vs. 10 kΩ) and supply voltage specification (X9420YS16-2.7 supports 2.7V–5.5V VCC, while standard X9420WS16 is rated for 5V ±10%). No PCB layout change is required for substitution within same resistance and voltage requirements.
X9420YS16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 64
- Resistance (Ohms):
- 2.5k
- Interface:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- ±5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±300ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
- Operating Temperature:
- 0°C ~ 70°C
- Resistance - Wiper (Ohms) (Typ):
- 40
X9420YS16 FAQ
1.How can I place an order for X9420YS16 through Aetrix?
Please submit a Request for Quotation (RFQ) for X9420YS16 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 X9420YS16 reliable?
The price and inventory of X9420YS16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X9420YS16 is usually 5 days.
3.What payment methods are accepted for X9420YS16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X9420YS16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X9420YS16?
X9420YS16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X9420YS16 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 X9420YS16?
For technical support, including X9420YS16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X9420YS16 requirements.
6.How does Aetrix verify that X9420YS16 is sourced from the original manufacturer or authorized distributors?
All X9420YS16 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 X9420YS16 meets industry standards.
7.What is the process for return or replacement of X9420YS16?
All X9420YS16 units undergo pre-shipment inspection (PSI). If there is an issue with X9420YS16, 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 X9420YS16 part is unused and in its original packaging.
Return procedure for X9420YS16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X9420YS16 Tags
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