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Microchip Technology MCP4132T-502E/MS
- Part No.:
- MCP4132T-502E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP4132T-502E/MS.pdf
- Description:
- IC DGTL POT 5KOHM 129TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,412
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Product details
Overview
MCP4132T-502E/MS from Microchip Technology is a single-channel, 7-bit volatile digital potentiometer configured as a rheostat (two-terminal variable resistor), offering 129-step resolution, 50 kΩ end-to-end resistance (±20%), and low 75 Ω typical wiper resistance. It operates from 1.8V to 5.5V, supports SPI interface up to 10 MHz (modes 0,0 and 1,1), and targets precision gain/offset trimming in analog sensor signal conditioning circuits.
For engineers reviewing the MCP4132T-502E/MS datasheet, MCP4132T-502E/MS pinout, MCP4132T-502E/MS application, or MCP4132T-502E/MS equivalent, this device delivers deterministic wiper positioning with mid-scale power-on reset, brown-out protection at 1.5 V, and high-voltage tolerant digital inputs up to 12.5 V - critical for industrial I/O modules and mixed-voltage embedded systems.
Technical Context
The MCP4132T-502E/MS implements a resistor ladder network with digitally controlled wiper position accessed via SPI commands. Its rheostat configuration connects only terminals P0B and P0W, leaving P0A floating - enabling true two-terminal variable resistance operation without internal potentiometer constraints.
It features volatile RAM-based wiper storage (no EEPROM), mid-scale POR/BOR default (40h for 7-bit), and terminal disconnect capability via SHDN pin or TCON register. The device exhibits 50 ppm/°C absolute tempco over –40°C to +70°C and supports split-rail analog supplies while maintaining full SPI functionality across 1.8V–5.5V VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 7-bit (129 steps): Enables coarse but stable resistance adjustment suitable for calibration loops where fine granularity is unnecessary. |
| RAB Resistance | 50 kΩ ±20%: Matches standard feedback networks in op-amp gain stages and voltage divider references. |
| Wiper Resistance | 75 Ω typical (max 300 Ω at 2.7 V): Minimizes insertion error in current-sensing or low-impedance bias paths. |
| SPI Speed | 10 MHz max (VDD ≥ 2.7 V): Allows rapid reconfiguration during system initialization or dynamic range adaptation. |
| Operating Voltage | 1.8 V to 5.5 V: Supports direct interfacing with 1.8 V logic controllers and compatibility with legacy 3.3 V/5 V systems. |
| Tempco (Absolute) | 50 ppm/°C (0°C to 70°C): Ensures <±0.35% resistance drift over industrial ambient range - sufficient for non-critical trimming. |
| Brown-out Threshold | 1.65 V typical: Guarantees reliable wiper reset before logic corruption occurs during power ramp-up. |
Pinout & Package
Package: 8-lead MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch), thermal pad exposed on bottom (EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0B | Resistor Network Terminal B | Fixed end of rheostat; connected to load or reference node in two-terminal configuration. |
| SDO | Serial Data Output | Tri-state output for SPI readback; shares function with SDI in multiplexed mode (MCP41X1 only). |
| P0W | Wiper Terminal | Variable contact point; carries full load current up to ±2.5 mA - must be routed with low-inductance trace. |
| VDD | Positive Supply | Power rail for digital core and resistor network; accepts 1.8–5.5 V with internal regulation for analog performance. |
| CS | Chip Select | Active-low enable; Schmitt-triggered with 0.45×VDD VIH threshold - tolerates slow-rising control signals. |
| SDI | Serial Data Input | Accepts command/address/data; high-voltage tolerant up to 12.5 V - enables level-shifting without external buffers. |
| SCK | Serial Clock | Edge-triggered input; supports both SPI modes 0,0 and 1,1 - compatible with most microcontroller peripherals. |
| VSS | Ground | Analog/digital common reference; separate from EP thermal pad - requires low-impedance connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Rheostat-only configuration | Eliminates unused terminal (P0A) and simplifies PCB layout for two-terminal applications like LED current control or sensor biasing. |
| High-voltage tolerant digital inputs | Withstands up to 12.5 V on CS/SDI/SCK/SHDN - enables direct connection to 12 V industrial buses without level shifters. |
| Terminal disconnect via SHDN | Hardware-controlled open-circuit mode isolates P0B–P0W path - essential for safe power cycling in battery-backed systems. |
| Low 2.5 µA inactive current | Reduces standby power in always-on instrumentation; achieves sub-µW sleep when CS = VIH and no clock activity. |
| Extended temperature range | Rated from –40°C to +125°C - validated for under-hood automotive sensors and industrial motor drive feedback networks. |
Applications
| Industrial Sensor Calibration | Programmable Current Sink |
|---|---|
|
Use Scenario: Adjusting offset/gain in 4–20 mA transmitter front-ends using loop-powered architecture. IC Role / Device Role / Timing Role: Rheostat element in op-amp feedback path to set transconductance; no timing dependency. Use Value: Enables field recalibration via MCU SPI without hardware modification; 50 kΩ range matches standard 250 Ω shunt + op-amp configurations. |
Use Scenario: Setting precise LED or laser diode bias current in optical modules with wide ambient temperature variation. IC Role / Device Role / Timing Role: Two-terminal current-limiting element between supply and cathode; wiper position defines ILED. Use Value: 75 Ω wiper resistance minimizes voltage drop error; 50 ppm/°C tempco ensures <±0.5% current drift over –40°C to +85°C. |
| Audio Volume Control | Microcontroller Analog Reference Trimming |
|
Use Scenario: Low-noise volume attenuation in portable audio DAC outputs where mechanical pot wear is unacceptable. IC Role / Device Role / Timing Role: Voltage divider (rheostat + fixed resistor) feeding op-amp buffer; updated only on user command. Use Value: 129-step resolution provides adequate perceptual granularity; MSOP package fits space-constrained headphone jack PCBs. |
Use Scenario: Compensating for ADC reference voltage drift in battery-operated IoT sensor nodes. IC Role / Device Role / Timing Role: Adjustable resistor in bandgap reference feedback loop; calibrated once at production test. Use Value: Mid-scale POR (40h) ensures known startup state; volatile memory avoids EEPROM wear-out in infrequently adjusted systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rheostat applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4142T-502E/MS | Non-volatile EEPROM wiper memory; retains setting after power loss; same 7-bit/50 kΩ specs. | Required where power-cycle persistence is mandatory (e.g., factory-set calibration constants). | Select when wiper value must survive unpowered storage; adds ~10 ms write latency vs. instantaneous RAM update. |
| AD5172BRUZ50 | 2-channel, I²C interface, 256-step (8-bit), 50 kΩ; includes EEPROM and shutdown mode. | Suitable for dual-rheostat designs (e.g., stereo audio) or systems constrained to I²C bus architecture. | Choose for multi-channel needs or I²C-native platforms; larger 14-lead TSSOP footprint vs. MSOP. |
Compared with MCP4142T-502E/MS and AD5172BRUZ50, the MCP4132T-502E/MS offers fastest wiper updates and smallest board area, making it optimal for cost-sensitive, single-rheostat applications where power-loss retention is not required.
Availability
MCP4132T-502E/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable current sinks, audio volume control, and microcontroller analog reference trimming requiring stable component supply across extended temperature ranges.
Supply support for MCP4132T-502E/MS 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
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, headquartered in Chandler, Arizona.
The MCP41XX family delivers SPI-controlled digital potentiometers optimized for precision analog trimming in resource-constrained embedded systems - emphasizing low power, wide voltage operation, and robust industrial temperature performance.
FAQ
What is the default wiper position after power-up for the MCP4132T-502E/MS?
The MCP4132T-502E/MS initializes its wiper to mid-scale (40h) upon power-up or brown-out reset. This behavior is hardwired and independent of prior settings since the device uses volatile RAM memory - ensuring predictable startup state for safety-critical analog paths.
Can the MCP4132T-502E/MS operate with a 1.8 V supply and still communicate reliably over SPI?
Yes, the MCP4132T-502E/MS supports full SPI functionality at 1.8 V VDD, though maximum SCK frequency is reduced to 1 MHz (vs. 10 MHz at ≥2.7 V). All digital input thresholds scale with VDD, and internal logic remains fully operational - verified across –40°C to +125°C.
Is the MCP4132T-502E/MS pin-compatible with other devices in the MCP413X family?
Yes - all MCP413X variants (e.g., MCP4131, MCP4132) share identical 8-pin MSOP pinout and terminal assignments. The "32" suffix denotes rheostat configuration (P0B/P0W active, P0A unused), while "31" indicates potentiometer mode (all three terminals functional).
Does the MCP4132T-502E/MS require external pull-up resistors on its SPI lines?
No - the MCP4132T-502E/MS integrates weak internal pull-ups on all digital inputs (CS, SDI, SCK, SHDN), eliminating need for external resistors in most applications. External pull-ups may be added only if faster edge rates are required for high-speed SPI reads using SDI/SDO multiplexing.
What is the maximum current rating for the wiper terminal (P0W) of the MCP4132T-502E/MS?
The MCP4132T-502E/MS wiper terminal (P0W) is rated for ±2.5 mA continuous current per the datasheet. Exceeding this limit risks nonlinear response or long-term degradation of the resistive element - design must ensure worst-case current stays within specification at all wiper positions and temperatures.
MCP4132T-502E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Rheostat
- Number of Circuits:
- 1
- Number of Taps:
- 129
- Resistance (Ohms):
- 5k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.8V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 150ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 75
MCP4132T-502E/MS FAQ
1.How can I place an order for MCP4132T-502E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP4132T-502E/MS 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 MCP4132T-502E/MS reliable?
The price and inventory of MCP4132T-502E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP4132T-502E/MS is usually 5 days.
3.What payment methods are accepted for MCP4132T-502E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP4132T-502E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP4132T-502E/MS?
MCP4132T-502E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP4132T-502E/MS 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 MCP4132T-502E/MS?
For technical support, including MCP4132T-502E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP4132T-502E/MS requirements.
6.How does Aetrix verify that MCP4132T-502E/MS is sourced from the original manufacturer or authorized distributors?
All MCP4132T-502E/MS 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 MCP4132T-502E/MS meets industry standards.
7.What is the process for return or replacement of MCP4132T-502E/MS?
All MCP4132T-502E/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP4132T-502E/MS, 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 MCP4132T-502E/MS part is unused and in its original packaging.
Return procedure for MCP4132T-502E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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