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Renesas X93155UM8I
- Part No.:
- X93155UM8I
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
X93155UM8I.pdf
- Description:
- IC DGTL POT 50KOHM 32TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,039
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Product details
Overview
X93155UM8I from Intersil is a digitally controlled potentiometer (XDCP™) configured as a two-terminal variable resistor with 32 wiper tap points, 50kΩ end-to-end resistance, nonvolatile EEPROM storage for power-up recall, and MSOP-8 packaging. It operates from 5V ±10%, draws 200µA active current, and supports bias/gain control and LCD contrast adjustment in industrial temperature range (–40°C to +85°C).
For engineers reviewing the X93155UM8I datasheet, X93155UM8I pinout, X93155UM8I application, or X93155UM8I equivalent, this device serves as a solid-state replacement for mechanical potentiometers where digital trimming, repeatable startup settings, and low-power standby (2.0µA max) are required in embedded analog interfaces.
Technical Context
The X93155UM8I implements a 31-element resistor array with a digitally controlled wiper driven by a 5-bit up/down counter and decoded via transfer gates. Wiper position is set via CS/U/D/INC interface and stored into nonvolatile memory on CS↑ with INC HIGH - enabling deterministic power-up behavior without external configuration.
It features temperature-compensated resistance (±35 ppm/°C), ±25% total resistance tolerance, and supports terminal voltages from VSS to VCC. The device operates in two modes: active wiper adjustment (CS LOW) and nonvolatile store (CS↑ + INC HIGH), with no requirement for external clock or serial protocol.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RTOTAL | 50 kΩ ±25% - defines full-scale resistance range for gain/bias networks; usable across 0–5V terminal voltage swing. |
| Wiper Resolution | 32 tap points (31 resistive elements) - enables ~3% step resolution for fine analog trimming. |
| VCC Supply | 5 V ±10% - compatible with standard logic rails; requires ≥1 V/ms ramp rate during power-up. |
| Active Current | 200 µA typical - enables continuous adjustment in low-power sensor front-ends without thermal drift impact. |
| Standby Current | 2.0 µA maximum - allows battery-backed systems to retain trim state for years without significant drain. |
| Data Retention | 100 years - ensures factory-set or user-calibrated values persist over product lifetime without refresh. |
| Endurance | 200,000 write cycles per bit - supports frequent recalibration in test equipment or adaptive systems. |
Pinout & Package
Package: 8-lead MSOP (M8.118, JEDEC MO-187AA), RoHS-compliant, Pb-free termination, 2.95 mm × 4.75 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 INC | Increment clock input | Negative-edge triggered; toggles wiper position up/down based on U/D state; requires tCYC ≥2 µs. |
| 2 U/D | Direction control | Logic level sets wiper movement direction (HIGH = increment, LOW = decrement) during INC edge. |
| 3 RH | High-side terminal | One end of 50kΩ resistor array; connected to wiper via internal switches; voltage range: 0 to VCC. |
| 4 VSS | Ground reference | System ground return for supply and logic; must be at same potential as RL/RH low-side reference. |
| 5 NC | No connection | May be left floating or tied to any voltage between VSS and VCC; no internal connection or function. |
| 6 RL | Low-side terminal | Other end of resistor array; forms two-terminal variable resistor with RH; wiper connects here internally. |
| 7 CS | Chip select / store trigger | LOW enables wiper control; HIGH with INC HIGH initiates nonvolatile store; internal 30kΩ pull-up when open. |
| 8 VCC | Supply voltage | 5V ±10% power rail; powers logic, memory, and resistor array; must remain ≥ VH/VL during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile wiper storage | Retains last-set position across power cycles - eliminates boot-time reconfiguration in instrumentation. |
| Up/down interface | Requires only three logic signals (CS/U/D/INC) - avoids complex SPI/I²C controllers in resource-constrained MCU designs. |
| Temperature-compensated array | ±35 ppm/°C TC ensures stable gain/bias over –40°C to +85°C - critical for precision analog signal chains. |
| Low-power standby mode | 2.0 µA max draw when deselected - extends battery life in portable LCD or sensor calibration devices. |
| 32-tap resolution with linear tracking | ±1 MI absolute linearity and ±0.5 MI relative linearity - supports accurate voltage divider ratios in feedback loops. |
Applications
| LCD Contrast Control | Instrumentation Amplifier Gain Trim |
|---|---|
|
Use Scenario: Adjusting contrast voltage for monochrome or segment-based LCD displays in industrial HMIs. IC Role / Device Role / Timing Role: Two-terminal variable resistor setting DC bias voltage between VSS and VCC for LCD backplane drive. Use Value: Enables firmware-controlled contrast optimization without mechanical adjustment; retains user preference after power loss. |
Use Scenario: Calibrating closed-loop gain in low-noise instrumentation amplifiers used in sensor signal conditioning. IC Role / Device Role / Timing Role: Replacing fixed feedback resistor to digitally adjust amplifier gain ratio (e.g., G = 1 + RTOTAL/Rset). Use Value: Supports factory calibration and field recalibration with <1% gain error stability over temperature and time. |
| Microcontroller-Based Bias Adjustment | Power Supply Feedback Divider |
|
Use Scenario: Setting reference voltages for ADC thresholds or op-amp bias points in microcontroller-peripheral circuits. IC Role / Device Role / Timing Role: Digitally programmable resistor replacing manual trimpot in analog front-end design. Use Value: Eliminates production-line manual tuning; enables software-defined operating modes (e.g., high/low sensitivity). |
Use Scenario: Adjusting output voltage of DC-DC converters via feedback resistor divider in programmable power modules. IC Role / Device Role / Timing Role: Variable element in upper/lower feedback leg to dynamically set regulated output voltage. Use Value: Allows remote voltage scaling without hardware change; nonvolatile storage maintains last-set output level after reboot. |
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 | 10kΩ RTOTAL, I²C interface, 256-tap resolution, 3.3V/5V supply | Requires I²C host controller; higher resolution but lower max resistance limits voltage divider range | Prefer when system already uses I²C and needs finer granularity than 32 steps |
| MCP41010-I/P | 10kΩ RTOTAL, SPI interface, volatile wiper register, no EEPROM | Lacks power-up recall; requires MCU initialization at boot; faster update rate (20 MHz SPI) | Prefer when dynamic real-time adjustment dominates over persistent settings |
Compared with X93155UM8I, AD5241BRMZ10 offers higher resolution and I²C compatibility but lacks direct up/down simplicity and has lower RTOTAL; MCP41010-I/P enables rapid SPI updates but requires firmware to restore wiper position after each power cycle.
Availability
X93155UM8I is available at Aetrix Electronics and suitable for LCD contrast control, instrumentation amplifier gain trim, and microcontroller-based bias adjustment requiring stable component supply across industrial temperature ranges and long-lifecycle deployments.
Supply support for X93155UM8I 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) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The X93155UM8I belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered to replace mechanical trimmers in applications demanding repeatability, reliability, and nonvolatile setting retention.
FAQ
What is the wiper storage mechanism in the X93155UM8I?
The X93155UM8I stores wiper position in on-chip EEPROM. A store operation is triggered when CS transitions HIGH while INC is held HIGH. Once stored, the value persists for 100 years and automatically loads on next power-up if CS is held HIGH during startup. This eliminates need for external memory or MCU initialization code for X93155UM8I.
Can the X93155UM8I operate from a 3.3V supply?
No - the X93155UM8I is specified only for 5V ±10% (4.5V to 5.5V) operation per its Absolute Maximum Ratings and Recommended Operating Conditions. Attempting 3.3V operation violates datasheet limits and may result in unreliable wiper movement, failed EEPROM writes, or undefined logic levels on CS/U/D/INC inputs for X93155UM8I.
How does the X93155UM8I handle multiple consecutive wiper steps?
When the X93155UM8I wiper moves several positions rapidly, multiple taps connect briefly (<10 µs), causing transient resistance deviations. This is inherent to the switch-array architecture. For stable analog paths, limit step rate or add RC filtering at RL/RH nodes - especially critical in precision gain-setting applications using X93155UM8I.
Is the NC pin on the X93155UM8I required to be grounded or left floating?
The NC pin (Pin 5) on the X93155UM8I has no internal connection and may be left unconnected or tied to any voltage between VSS and VCC. It is not recommended to tie it to VCC or VSS unless needed for PCB routing symmetry; doing so introduces no functional benefit or risk for X93155UM8I.
What is the maximum allowable voltage across RH and RL terminals of the X93155UM8I?
The X93155UM8I permits terminal voltages from VSS to VCC (0 to 5.5V) on RH and RL, but maximum resistor current must not exceed 2 mA. At 50kΩ RTOTAL, this limits safe differential voltage to ≤100 mV for continuous operation. Higher voltages require current limiting to avoid exceeding 2 mA or 1 mW power rating - a key constraint in all X93155UM8I designs.
X93155UM8I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 32
- Resistance (Ohms):
- 50k
- Interface:
- Up/Down (U/D, INC, CS)
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 5V
- Features:
- -
- Tolerance:
- ±25%
- Temperature Coefficient (Typ):
- ±35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- -
X93155UM8I FAQ
1.How can I place an order for X93155UM8I through Aetrix?
Please submit a Request for Quotation (RFQ) for X93155UM8I 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 X93155UM8I reliable?
The price and inventory of X93155UM8I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X93155UM8I is usually 5 days.
3.What payment methods are accepted for X93155UM8I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X93155UM8I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X93155UM8I?
X93155UM8I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X93155UM8I 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 X93155UM8I?
For technical support, including X93155UM8I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X93155UM8I requirements.
6.How does Aetrix verify that X93155UM8I is sourced from the original manufacturer or authorized distributors?
All X93155UM8I 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 X93155UM8I meets industry standards.
7.What is the process for return or replacement of X93155UM8I?
All X93155UM8I units undergo pre-shipment inspection (PSI). If there is an issue with X93155UM8I, 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 X93155UM8I part is unused and in its original packaging.
Return procedure for X93155UM8I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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