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Renesas ISL90842UIV1427Z-TK
- Part No.:
- ISL90842UIV1427Z-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL90842UIV1427Z-TK.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:993
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Product details
Overview
ISL90842UIV1427Z-TK from Intersil is a quad digitally controlled variable resistor (DCP) IC with I²C interface, 50kΩ total resistance per channel, 256-tap resolution (0.4%), wiper resistance of 70Ω typical at 3.3V, and operates from 2.7V to 5.5V supply. It functions as four independent two-terminal rheostats for precision analog trimming in sensor signal conditioning, power supply feedback loops, and audio gain control.
For engineers reviewing the ISL90842UIV1427Z-TK datasheet, ISL90842UIV1427Z-TK pinout, ISL90842UIV1427Z-TK application, or ISL90842UIV1427Z-TK equivalent, this device delivers low-noise, low-power digital potentiometer functionality with verified I²C timing compliance up to 400kHz, ±3mA wiper current rating, and industrial temperature range support (–40°C to +85°C).
Technical Context
The ISL90842UIV1427Z-TK implements four monolithic CMOS DCPs using resistor ladders and CMOS switches, each controlled by an independent 8-bit volatile Wiper Register (WR) accessible via I²C. The RL terminals are unconnected; only RH and RW pins are used per channel, enabling true two-terminal rheostat operation.
I²C communication uses a 7-bit slave address formed by A1/A0 pins and fixed prefix 01010, supporting read/write operations with ACK handshaking. Power-up resets all WRs to 0x80 (mid-scale), and standby current is specified at ≤5µA at 5.5V - critical for battery-powered calibration circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total resistance | 50kΩ per DCP - sets full-scale adjustment range for feedback or bias networks |
| Resolution | 256 taps (8-bit) - enables 0.4% step resolution for fine-grained analog tuning |
| Wiper resistance | 70Ω typical at 3.3V - contributes minimal series error in low-impedance signal paths |
| Supply voltage | 2.7V to 5.5V - supports single-supply operation across 3.3V and 5V systems |
| Standby current | <5µA max at 5.5V - enables always-on calibration without significant quiescent drain |
| I²C speed | 400kHz max - compatible with standard-mode I²C controllers without timing margin risk |
| Temp range | –40°C to +85°C - qualified for industrial ambient environments |
| TCR | ±45ppm/°C - ensures stable resistance over temperature in precision references |
Pinout & Package
ISL90842UIV1427Z-TK is housed in a 14-lead TSSOP (Package Code V14), RoHS-compliant, Pb-free plus anneal construction. Dimensions: 4.3mm × 5.1mm × 1.05mm body height, 0.65mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RH3, RH2, RH1, RH0 | High terminal of DCP3–DCP0 | Fixed end of each resistor ladder; connects to supply or reference node in rheostat mode |
| RW3, RW2, RW1, RW0 | Wiper terminal of DCP3–DCP0 | Adjustable tap point; carries ≤±3mA wiper current; output of digital-to-resistance conversion |
| SCL | I²C clock input | Accepts 400kHz max clock; hysteresis ≥0.05×VCC ensures noise immunity |
| SDA | I²C bidirectional data | Open-drain output with VOL ≤0.4V @ 4mA; requires external pull-up |
| A0, A1 | I²C device address inputs | Set LSBs of 7-bit slave address (01010xx); enable up to four devices on same bus |
| VCC | Power supply | 2.7V–5.5V analog/digital rail; powers internal logic and DCP switches |
| GND | Ground reference | Common return for all DCPs and I²C interface; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent DCPs | Four isolated 50kΩ rheostats in one 14-pin TSSOP - reduces board space vs discrete pots or dual-DKP solutions |
| Low wiper resistance | 70Ω typical at 3.3V - minimizes insertion loss and nonlinearity in signal-path applications |
| Volatile wiper registers | 8-bit WR per channel, reset to 0x80 at power-up - ensures known mid-scale startup state |
| Low standby power | <5µA ICC at 5.5V - enables integration into energy-sensitive systems without compromising calibration availability |
| Industrial temp grade | –40°C to +85°C operation - validated for use in motor drives, industrial sensors, and telecom line cards |
| RoHS-compliant packaging | Pb-free plus anneal TSSOP - meets IPC/JEDEC J-STD-020 reflow requirements for SnPb and Pb-free soldering |
Applications
| Temperature Sensor Calibration | DC-DC Feedback Trimming |
|---|---|
|
Use Scenario: Adjusting offset/gain in RTD or thermistor signal chains to meet ±0.1°C accuracy targets. IC Role / Device Role / Timing Role: Quad rheostat providing programmable series/shunt resistance in instrumentation amplifier feedback networks. Use Value: Enables field-updatable calibration without hardware change; 256-tap resolution supports <0.05% gain error correction. |
Use Scenario: Fine-tuning output voltage of isolated DC-DC converters during production test or system-level validation. IC Role / Device Role / Timing Role: Replacing mechanical trimmer in feedback divider to set VOUT = VREF × (1 + R1/R2). Use Value: Eliminates manual adjustment labor; 50kΩ range accommodates common 2.5V/2.495V reference dividers with <1mV resolution. |
| Audio Channel Balance Control | LED Driver Current Scaling |
|
Use Scenario: Matching left/right channel gain in professional audio mixers or headphone amplifiers. IC Role / Device Role / Timing Role: Two-terminal rheostat in op-amp gain-setting path for stereo pair channels. Use Value: 0.4% step resolution ensures <0.03dB channel matching; low wiper resistance avoids high-frequency roll-off. |
Use Scenario: Setting precise LED current in backlight or status indicator circuits where thermal drift must be compensated. IC Role / Device Role / Timing Role: Series-adjustable current-limiting element in constant-current sink configuration. Use Value: ±3mA wiper rating supports up to 20mA LED drive; TCR of ±45ppm/°C maintains brightness stability across operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ10 | 10kΩ total resistance, SPI interface, 256 taps, 200Ω wiper resistance | Requires SPI host instead of I²C; higher wiper resistance limits low-impedance signal use | Choose when SPI is already dominant in system and lower resistance range suffices |
| MCP4018T-E/OT | Single-channel, 50kΩ, I²C, 125Ω wiper resistance, 100kΩ max supply | Single DCP only; no quad integration; higher wiper resistance degrades precision in <1kΩ paths | Use when board space allows multiple units and simpler single-channel control is preferred |
Compared with ISL90842UIV1427Z-TK, AD5242BRUZ10 offers SPI compatibility but lacks integrated quad topology and has higher wiper resistance, while MCP4018T-E/OT provides identical resistance value but requires four separate devices and sacrifices layout efficiency and inter-channel matching.
Availability
ISL90842UIV1427Z-TK is available at Aetrix Electronics and suitable for industrial sensor calibration, DC-DC converter feedback tuning, and audio channel balancing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL90842UIV1427Z-TK 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 precision analog, power management, and interface ICs for industrial, computing, and communications markets.
The ISL90842UIV1427Z-TK belongs to Intersil's digitally controlled potentiometer product line, designed specifically for replacing mechanical trimmers in automated calibration, power supply trimming, and signal-path adjustment applications where I²C configurability and quad integration add value.
FAQ
What is the total resistance value of the ISL90842UIV1427Z-TK?
The ISL90842UIV1427Z-TK has a total resistance of 50kΩ per digitally controlled potentiometer channel. This value is fixed and confirmed in the datasheet under Analog Specifications (RTOTAL, U option). Each of the four DCPs shares this 50kΩ end-to-end resistance, enabling consistent scaling across all channels in multi-channel trimming applications.
Does the ISL90842UIV1427Z-TK support I²C standard-mode or fast-mode?
The ISL90842UIV1427Z-TK supports I²C fast-mode operation up to 400kHz, as specified in the Serial Interface Specs table (fSCL = 400kHz). Its timing parameters - including tLOW (1300ns), tHIGH (600ns), and tSU:STA (600ns) - comply fully with the I²C-bus Fast-mode specification, ensuring interoperability with standard microcontrollers and FPGAs without additional level-shifting or timing adaptation.
How is the device address configured on the ISL90842UIV1427Z-TK?
The ISL90842UIV1427Z-TK uses pins A0 and A1 to configure the two LSBs of its 7-bit I²C slave address. The base prefix is 01010, so valid addresses are 0x28 (A1=0, A0=0), 0x29 (A1=0, A0=1), 0x2A (A1=1, A0=0), and 0x2B (A1=1, A0=1). This allows up to four ISL90842UIV1427Z-TK devices on the same I²C bus without address conflict.
What happens to the wiper positions during power-up of the ISL90842UIV1427Z-TK?
At power-up, all four wiper registers (WR0–WR3) in the ISL90842UIV1427Z-TK reset to 0x80 (decimal 128), placing each wiper at approximately mid-scale - i.e., ~25kΩ between RH and RW for the 50kΩ variant. This behavior is explicitly documented in the Principles of Operation section and ensures a known, safe startup state for feedback or bias networks before host initialization.
Can the ISL90842UIV1427Z-TK be used as a three-terminal potentiometer?
No - the ISL90842UIV1427Z-TK is configured exclusively as a two-terminal variable resistor (rheostat). The RL terminals for all four DCPs are left floating per the datasheet Functional Diagram and Pin Descriptions. Only RH and RW pins are functional; no internal connection exists to RL, making true three-terminal potentiometer operation impossible with this device.
ISL90842UIV1427Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL90842UIV1427Z-TK FAQ
1.How can I place an order for ISL90842UIV1427Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL90842UIV1427Z-TK 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 ISL90842UIV1427Z-TK reliable?
The price and inventory of ISL90842UIV1427Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL90842UIV1427Z-TK is usually 5 days.
3.What payment methods are accepted for ISL90842UIV1427Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL90842UIV1427Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL90842UIV1427Z-TK?
ISL90842UIV1427Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL90842UIV1427Z-TK 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 ISL90842UIV1427Z-TK?
For technical support, including ISL90842UIV1427Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL90842UIV1427Z-TK requirements.
6.How does Aetrix verify that ISL90842UIV1427Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL90842UIV1427Z-TK 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 ISL90842UIV1427Z-TK meets industry standards.
7.What is the process for return or replacement of ISL90842UIV1427Z-TK?
All ISL90842UIV1427Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL90842UIV1427Z-TK, 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 ISL90842UIV1427Z-TK part is unused and in its original packaging.
Return procedure for ISL90842UIV1427Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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