My Inquiry
My Account
Renesas ISL22343UFV20Z
- Part No.:
- ISL22343UFV20Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL22343UFV20Z.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,645
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL22343UFV20Z from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution, I²C interface, 50kΩ end-to-end resistance, dual supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), and extended industrial temperature range (−40°C to +125°C). It enables precise analog parameter tuning in bipolar signal conditioning circuits.
For engineers reviewing the ISL22343UFV20Z datasheet, ISL22343UFV20Z pinout, ISL22343UFV20Z application, or ISL22343UFV20Z equivalent, key selection considerations include wiper resistance (70Ω typ), DCP-to-DCP matching (±2 LSB), voltage divider INL (±0.2 LSB for U-option), shutdown current (<4µA), and TSSOP-20 package compatibility with legacy board layouts.
Technical Context
The ISL22343UFV20Z integrates four independent 256-tap DCPs with volatile Wiper Registers (WRi) and non-volatile Initial Value Registers (IVRi), enabling power-up recall of preset wiper positions. Each DCP supports both three-terminal potentiometer and two-terminal rheostat configurations.
Its I²C interface features three address pins (A0–A2), supporting up to eight devices on one bus, with full read/write access to WRi, IVRi, and 11 general-purpose non-volatile registers. Dual-supply architecture allows bipolar terminal voltage swing between V− and VCC, critical for AC-coupled or rail-to-rail analog signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 50kΩ - defines maximum adjustable resistance between RH and RL terminals; determines gain/attenuation scaling in voltage divider mode. |
| Wiper Resistance | 70Ω typical at 1mA - directly impacts insertion loss and signal integrity when used as variable resistor or attenuator. |
| Voltage Divider INL | ±0.2 LSB - ensures monotonic, high-accuracy voltage division across all 256 taps; critical for precision biasing and calibration. |
| DCP Matching | ±2 LSB - guarantees consistent wiper voltage across all four DCPs under identical register settings; essential for multi-channel synchronization. |
| Standby Current | ≤4.0µA at +125°C - enables low-power system states without losing wiper position state; supports always-on sensor front-ends. |
| Non-volatile Endurance | 1,000,000 write cycles - supports field recalibration and adaptive tuning over product lifetime without EEPROM wear-out concerns. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and aerospace power supply monitoring applications. |
Pinout & Package
ISL22343UFV20Z is housed in a Pb-free, RoHS-compliant 20-lead TSSOP package (M20.173), optimized for thermal performance and PCB space efficiency in high-density analog designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| RH3 | High terminal of DCP3 | Fixed end of DCP3 resistor array; connects to positive reference or signal source in voltage divider configuration. |
| RL3 | Low terminal of DCP3 | Fixed end of DCP3 resistor array; connects to ground, negative rail (V−), or return path in bipolar operation. |
| RW3 | Wiper terminal of DCP3 | Movable contact point; output node whose voltage/resistance is digitally set via WR3 register (0–255). |
| A2 | I²C device address input | Configures third LSB of 7-bit slave address; enables unique addressing among up to eight ISL22343 devices on same bus. |
| SCL | I²C clock input | Open-drain input requiring external pull-up; synchronizes all serial data transfers at up to 400kHz. |
| SDA | I²C bidirectional data line | Open-drain I/O requiring external pull-up; carries address, command, and data bytes in both read and write operations. |
| GND | Digital ground reference | Reference for logic-level signals (A0–A2, SCL, SDA); must be tied to system digital ground plane. |
| RW2 | Wiper terminal of DCP2 | Independent programmable output for second DCP channel; supports parallel or cascaded analog control loops. |
| RL2 | Low terminal of DCP2 | Shared or isolated low-side connection; configurable for single-ended or differential signal routing. |
| RH2 | High terminal of DCP2 | Independent high-side connection; enables independent biasing of multiple amplifier stages or sensor elements. |
| RW0 | Wiper terminal of DCP0 | Primary control channel wiper; commonly used for master gain or offset adjustment in multi-stage signal chains. |
| RH0 | High terminal of DCP0 | Typically connected to VCC or positive reference; sets upper voltage boundary for DCP0's adjustable range. |
| RL0 | Low terminal of DCP0 | Typically connected to V− or system ground; establishes lower voltage boundary for bipolar or unipolar operation. |
| A0, A1 | I²C device address inputs | Set first two LSBs of slave address; allow hardware-selectable device identity without firmware reconfiguration. |
| VCC | Positive supply rail | Supplies core logic and DCP arrays; operates from 2.25V to 5.5V; powers internal I²C interface and register logic. |
| V− | Negative supply rail | Enables true bipolar operation; supports DCP terminal voltages down to −5.5V; required for AC-coupled or dual-rail systems. |
| RH1, RL1, RW1 | DCP1 terminals | Third independent DCP channel; supports simultaneous tuning of feedback networks in multi-loop power converters. |
| RH3, RL3, RW3 | DCP3 terminals | Fourth DCP channel; used for redundancy, calibration trim, or auxiliary signal path control in safety-critical systems. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 256-tap DCPs in single TSSOP-20 | Reduces board area and BOM count vs. discrete potentiometers or multiple single-channel ICs; simplifies layout in space-constrained modules. |
| Non-volatile IVRi with 50-year retention | Preserves factory-calibrated or user-defined wiper positions across power cycles and long-term storage; eliminates boot-time initialization overhead. |
| Dual supply support (VCC/V−) | Enables true bipolar analog signal handling (e.g., ±2.5V or ±5V ranges) without external level-shifting circuitry or op-amp rails. |
| 11 GP non-volatile registers | Stores lookup tables for temperature-compensated wiper settings, calibration coefficients, or system configuration data-retained across power loss. |
| Make-before-break wiper switching | Prevents open-circuit glitches during tap transitions; ensures uninterrupted signal path in audio volume control or sensor excitation circuits. |
| ±0.2 LSB voltage divider INL (U-option) | Delivers high-fidelity attenuation/gain control in precision instrumentation amplifiers and medical sensor front-ends where linearity is critical. |
Applications
| Audio Signal Conditioning | Industrial Sensor Calibration |
|---|---|
|
Use Scenario: Programmable gain control in professional audio mixers with DC-coupled inputs requiring bipolar signal swing. IC Role / Device Role / Timing Role: Quad DCP acts as four independent, digitally tuned voltage dividers setting gain for preamplifier stages and channel faders. Use Value: Enables remote firmware-based gain trimming without manual potentiometer adjustment; 50kΩ resistance matches standard audio impedance targets. |
Use Scenario: Offset and span calibration of RTD or thermocouple transmitters operating across −40°C to +125°C ambient. IC Role / Device Role / Timing Role: ISL22343UFV20Z provides non-volatile trim for zero-point (IVR0) and full-scale (IVR1) compensation in analog front-end signal chains. Use Value: Eliminates mechanical trimpots subject to vibration drift; 50-year EEPROM retention ensures calibration stability over product lifetime. |
| Automotive Power Supply Monitoring | Bipolar Op-Amp Bias Networks |
|
Use Scenario: Adjustable threshold detection in 12V/24V vehicle battery monitoring systems with wide temperature variation. IC Role / Device Role / Timing Role: DCP channels configure comparator reference voltages and hysteresis levels for undervoltage/overvoltage alarms. Use Value: Dual-supply capability allows direct interfacing with split-rail comparators; −40°C to +125°C rating meets AEC-Q100 Grade 1 requirements. |
Use Scenario: Precision biasing of rail-to-rail input/output op-amps in test equipment requiring symmetrical positive/negative supply headroom. IC Role / Device Role / Timing Role: ISL22343UFV20Z sets matched input offset nulling resistors and feedback network ratios across multiple amplifier stages. Use Value: ±2 LSB DCP matching ensures balanced common-mode rejection; 70Ω wiper resistance minimizes loading error in high-Z bias nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL22343WFR20Z | 10kΩ total resistance (vs. 50kΩ), QFN-20 package (vs. TSSOP-20), same pinout but different thermal pad connection (EPAD tied to V−). | Better suited for low-impedance, high-bandwidth applications (e.g., RF bias control); requires PCB redesign due to QFN footprint and thermal land. | Select ISL22343WFR20Z only if lower resistance and higher cutoff frequency (1MHz vs. 250kHz) are required and QFN assembly is supported. |
| AD5242BRUZ50 | Single 256-tap DCP, 50kΩ, I²C interface, TSSOP-16; no dual supply support (VDD/GND only); ±30% resistance tolerance (vs. ±20%). | Lacks bipolar operation and quad integration; suitable only for unipolar, single-channel use cases with relaxed matching and tempco requirements. | Choose AD5242BRUZ50 only for cost-sensitive, low-channel-count designs where V− rail is unavailable and DCP matching is non-critical. |
Compared with ISL22343WFR20Z and AD5242BRUZ50, the ISL22343UFV20Z uniquely delivers quad-channel 50kΩ DCPs in TSSOP-20 with bipolar supply support and ±0.2 LSB linearity-making it optimal for space-constrained, high-precision, multi-channel analog tuning where mechanical reliability and long-term calibration stability are mandatory.
Availability
ISL22343UFV20Z is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive power monitoring, and audio signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL22343UFV20Z 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 Corporation acquired Intersil in 2017 and continues to support its precision analog portfolio, including digitally controlled potentiometers and power management ICs.
The ISL22343 series was designed for high-reliability analog tuning in harsh environments, targeting applications demanding non-volatile calibration, bipolar signal handling, and multi-channel synchronization without mechanical wear.
FAQ
What is the total resistance value of the ISL22343UFV20Z?
The ISL22343UFV20Z has a nominal end-to-end resistance of 50kΩ between each RH and RL terminal pair. This value is specified with ±20% tolerance over temperature and is confirmed in the Analog Specifications table on page 4 of the FN6423 datasheet. The "U" in the part number explicitly denotes the 50kΩ option.
Does the ISL22343UFV20Z support bipolar voltage operation?
Yes, the ISL22343UFV20Z supports true bipolar operation via separate VCC (2.25V to 5.5V) and V− (−2.25V to −5.5V) supplies. This allows DCP terminals (RH, RL, RW) to swing between V− and VCC, enabling AC-coupled signal paths and rail-to-rail analog control without external level shifters.
How does the non-volatile memory function in the ISL22343UFV20Z?
The ISL22343UFV20Z contains four non-volatile Initial Value Registers (IVR0–IVR3) that store wiper positions across power cycles. At power-up, these values are automatically loaded into volatile Wiper Registers (WR0–WR3). IVR data retains for 50 years at ≤+55°C and withstands 1,000,000 write cycles per register.
What package type is used for the ISL22343UFV20Z?
The ISL22343UFV20Z uses a 20-lead TSSOP package (Moisture Sensitivity Level 1, Pb-free, RoHS compliant) with package drawing M20.173. Pinout matches the ISL22343TFV20Z and ISL22343WFV20Z variants, enabling drop-in replacement within the same footprint family.
Can the ISL22343UFV20Z be used as a two-terminal variable resistor?
Yes, each of the four DCPs in the ISL22343UFV20Z can operate as a two-terminal variable resistor (rheostat) by connecting either RH or RL to a fixed potential and using RW with the other terminal. The datasheet confirms this mode on page 1 and specifies RINL (±0.3 MI) and RDNL (±0.04 MI) for rheostat operation.
ISL22343UFV20Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.25V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22343UFV20Z FAQ
1.How can I place an order for ISL22343UFV20Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22343UFV20Z 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 ISL22343UFV20Z reliable?
The price and inventory of ISL22343UFV20Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22343UFV20Z is usually 5 days.
3.What payment methods are accepted for ISL22343UFV20Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22343UFV20Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22343UFV20Z?
ISL22343UFV20Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22343UFV20Z 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 ISL22343UFV20Z?
For technical support, including ISL22343UFV20Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22343UFV20Z requirements.
6.How does Aetrix verify that ISL22343UFV20Z is sourced from the original manufacturer or authorized distributors?
All ISL22343UFV20Z 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 ISL22343UFV20Z meets industry standards.
7.What is the process for return or replacement of ISL22343UFV20Z?
All ISL22343UFV20Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL22343UFV20Z, 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 ISL22343UFV20Z part is unused and in its original packaging.
Return procedure for ISL22343UFV20Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL22343UFV20Z Tags
-
MCP4018T-103E/LT
Microchip Technology
-
MCP4018T-503E/LT
Microchip Technology
-
MCP4011T-103E/SN
Microchip Technology
-
MCP4018T-104E/LT
Microchip Technology
-
MCP4017T-503E/LT
Microchip Technology
-
MCP4018T-502E/LT
Microchip Technology
-
MCP4017T-103E/LT
Microchip Technology
-
MCP4531T-103E/MF
Microchip Technology
-
MCP4021T-202E/SN
Microchip Technology
-
MCP4023T-103E/CH
Microchip Technology
-
MCP4022T-503E/CH
Microchip Technology
-
MCP4551T-502E/MS
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
