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Home > Products > RF and Wireless > RFID, RF Access, Monitoring ICs

Microchip Technology MCP2030AT-I/SL

Name: MCP2030AT-I/SL
Brand: Microchip Technology
SKU: MCP2030AT-I/SL
Price: 2.40 USD
Availability: InStock
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Part No.:: MCP2030AT-I/SL

Manufacturer:: Microchip Technology

Category:: RFID, RF Access, Monitoring ICs

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: MCP2030AT-I/SL.pdf

Description:: IC PEPS/TPMS 125KHZ 14SOIC

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Product details

Overview

MCP2030AT-I/SL from Microchip Technology is a three-channel low-frequency (125 kHz) analog front-end IC for bidirectional LF transponder communication, featuring 1 mV_PP input sensitivity, programmable 63 pF antenna tuning per channel, and SPI-configurable demodulated data/carrier clock/RSSI outputs - deployed in automotive passive keyless entry (PKE) transponders and tire pressure monitoring system (TPMS) LF initiators.

For engineers reviewing the MCP2030AT-I/SL datasheet, MCP2030AT-I/SL pinout, MCP2030AT-I/SL application, or MCP2030AT-I/SL equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in PKE and access control, and two validated alternative AFEs with documented functional and parametric differences.

Technical Context

The MCP2030AT-I/SL implements a fully integrated analog signal chain for 125 kHz LF carrier detection, amplitude demodulation, and RSSI generation across three independent LC input channels (LCX/LCY/LCZ), each with digitally programmable tuning capacitance (0–63 pF, 1 pF/step) and configurable output enable filters (9 timing options, up to 10 ms period).

It features an internal 32 kHz RC oscillator (±1.5 kHz tolerance), AGC stabilization time of 4 ms, and supports battery-backed and batteryless operation via external circuitry; its SPI interface operates up to 3 MHz with guaranteed setup/hold timing and open-drain ALERT/LFDATA outputs.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Carrier Frequency	125 kHz - precisely matched to automotive LF standards for PKE and TPMS initiator systems.
Input Sensitivity	1 mV_PP (min) - enables reliable detection of weak signals from distant or misaligned transponders.
Modulation Depth Support	8% (min) - allows decoding of low-depth AM-modulated signals common in low-power transponders.
Active Current (3 ch)	13 µA (typ) - sustains continuous LF listening in ultra-low-power applications like battery-operated keys.
Standby Current (3 ch)	4 µA (typ) - extends battery life in always-on standby modes without sacrificing wake-up responsiveness.
Tuning Capacitance Range	0–63 pF per channel, 1 pF/step - enables precise LC resonance calibration for production tolerances and temperature drift.
SPI Clock Max Rate	3 MHz - ensures fast register configuration during system initialization or dynamic mode switching.

Pinout & Package

Package: 14-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, industrial temperature range (−40°C to +85°C).

Pin/Terminal	Circuit Role	Design Meaning
VSS (Pins 1, 14)	Ground reference	Dual ground pins reduce impedance and improve noise immunity for analog/digital sections.
CS (Pin 2)	Digital input / SPI mode select	High = normal operation (LFDATA/CCLK/RSSI active); low = SPI programming mode.
SCLK/ALERT (Pin 3)	Input/output dual-function	Functions as SPI clock when CS = low; becomes open-drain ALERT output (parity/alarm flag) when CS = high.
RSSI (Pin 4)	Analog current output	Sinks linear current (0.65–100 µA) proportional to input signal strength - used for proximity estimation and signal validation.
LFDATA/CCLK/SDIO (Pin 6)	Configurable I/O	Outputs demodulated NRZ data or carrier clock (÷1 or ÷4) when CS = high; serves as SPI data I/O when CS = low.
VDD (Pins 7, 8)	Power supply	Dual VDD pins support stable 2.0–3.6 V operation with local 0.1 µF bypassing per pin.
LCX/LCY/LCZ (Pins 11, 10, 9)	LF antenna inputs	Three independent high-impedance (800 kΩ) inputs for orthogonal LC resonant circuits - enable omnidirectional field detection.
LCCOM (Pin 13)	Common antenna reference	Shared return path for all three LC antennas - simplifies PCB layout and improves channel matching.

Key Features

Feature	Design Value
Three independent LC input channels	Enables simultaneous x/y/z directional sensing - critical for orientation-agnostic PKE transponder wake-up.
Programmable per-channel tuning capacitance	63 pF range (1 pF/step) allows fine-tuning of LC resonance without external components - reduces BOM count and calibration labor.
Configurable output enable filters	Nine timing combinations (e.g., 1 ms high / 4 ms low) reject false triggers from noise or transient interference - improves system reliability in electrically noisy vehicles.
Battery-backup and batteryless operation modes	Supports energy harvesting and capacitor-powered designs - eliminates primary battery dependency in maintenance-free TPMS sensors.
Low-power AGC with 4 ms stabilization	Ensures consistent demodulation performance across varying signal strengths while consuming only 13 µA during active reception.

Applications

Automotive Passive Keyless Entry (PKE)	Long-Range Access Control
Use Scenario: Vehicle detects driver's key fob within 2–3 meters using LF field excitation and backscatter response. IC Role / Device Role / Timing Role: MCP2030AT-I/SL acts as the LF initiator AFE - receives modulated backscatter from fob, demodulates command data, and validates signal integrity via RSSI. Use Value: 1 mV_PP sensitivity and 8% modulation depth support extend operational range and enable reliable detection even with fob inside pocket or bag.	Use Scenario: Secure gate or parking lot reader identifies authorized transponders at distances up to 1.5 meters without user interaction. IC Role / Device Role / Timing Role: MCP2030AT-I/SL serves as the multi-channel LF initiator - drives three orthogonal antennas to eliminate dead zones and ensure omnidirectional coverage. Use Value: Programmable 63 pF tuning per channel compensates for antenna manufacturing variance, enabling consistent read range across production units.
Tire Pressure Monitoring System (TPMS) LF Initiator	Engine Immobilizer Transponder Reader
Use Scenario: Vehicle initiates TPMS sensor wake-up before driving to retrieve real-time pressure/temperature data. IC Role / Device Role / Timing Role: MCP2030AT-I/SL generates 125 kHz carrier, detects low-duty-cycle backscatter from battery-constrained TPMS sensors, and extracts telemetry via demodulated data output. Use Value: 4 µA standby current and batteryless operation capability allow integration into low-cost, maintenance-free TPMS reader modules.	Use Scenario: Ignition system verifies transponder ID embedded in car key before enabling engine start. IC Role / Device Role / Timing Role: MCP2030AT-I/SL functions as the secure LF reader AFE - performs authenticated challenge-response with immobilizer transponder using demodulated data and RSSI-based presence validation. Use Value: Open-drain ALERT output flags parity errors or timeout conditions - provides hardware-level fault indication for safety-critical immobilizer handshakes.

Automotive Passive Keyless Entry (PKE)

Long-Range Access Control

Use Scenario: Vehicle detects driver's key fob within 2–3 meters using LF field excitation and backscatter response.

IC Role / Device Role / Timing Role: MCP2030AT-I/SL acts as the LF initiator AFE - receives modulated backscatter from fob, demodulates command data, and validates signal integrity via RSSI.

Use Value: 1 mV_PP sensitivity and 8% modulation depth support extend operational range and enable reliable detection even with fob inside pocket or bag.

Use Scenario: Secure gate or parking lot reader identifies authorized transponders at distances up to 1.5 meters without user interaction.

IC Role / Device Role / Timing Role: MCP2030AT-I/SL serves as the multi-channel LF initiator - drives three orthogonal antennas to eliminate dead zones and ensure omnidirectional coverage.

Use Value: Programmable 63 pF tuning per channel compensates for antenna manufacturing variance, enabling consistent read range across production units.

Tire Pressure Monitoring System (TPMS) LF Initiator

Engine Immobilizer Transponder Reader

Use Scenario: Vehicle initiates TPMS sensor wake-up before driving to retrieve real-time pressure/temperature data.

IC Role / Device Role / Timing Role: MCP2030AT-I/SL generates 125 kHz carrier, detects low-duty-cycle backscatter from battery-constrained TPMS sensors, and extracts telemetry via demodulated data output.

Use Value: 4 µA standby current and batteryless operation capability allow integration into low-cost, maintenance-free TPMS reader modules.

Use Scenario: Ignition system verifies transponder ID embedded in car key before enabling engine start.

IC Role / Device Role / Timing Role: MCP2030AT-I/SL functions as the secure LF reader AFE - performs authenticated challenge-response with immobilizer transponder using demodulated data and RSSI-based presence validation.

Use Value: Open-drain ALERT output flags parity errors or timeout conditions - provides hardware-level fault indication for safety-critical immobilizer handshakes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LF analog front-end applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDK IAM-8202	Single-channel, fixed 125 kHz carrier, no programmable tuning capacitors; higher active current (25 µA).	Limited to single-axis LF detection; unsuitable for omnidirectional PKE or TPMS initiator requiring x/y/z coverage.	Select when cost is prioritized over multi-directional performance and tuning flexibility.
NXP UCODE I2C	Integrated NFC/RFID tag IC with built-in EEPROM; lacks dedicated LF AFE functionality - requires external 125 kHz frontend.	Designed for passive RFID tag operation, not initiator-side signal generation/demodulation.	Choose only for tag-side implementation; not a functional substitute for MCP2030AT-I/SL's initiator AFE role.

Compared with TDk IAM-8202 and NXP UCODE I2C, the MCP2030AT-I/SL uniquely delivers three independently tunable LF input channels, sub-millivolt sensitivity, and true initiator-mode demodulation - making it the only viable option for production-grade automotive PKE and TPMS readers requiring robust omnidirectional performance and ultra-low power.

Availability

MCP2030AT-I/SL is available at Aetrix Electronics and suitable for automotive passive keyless entry (PKE), tire pressure monitoring system (TPMS) initiators, and long-range access control readers requiring stable component supply, full traceability, and lifecycle continuity.

Supply support for MCP2030AT-I/SL 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 devices, and connectivity solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.

The MCP2030 product line is designed specifically as a stand-alone, ultra-low-power analog front-end for 125 kHz LF transponder initiator applications - targeting PKE, TPMS, and immobilizer systems where sensitivity, directionality, and battery longevity are critical.

FAQ

What is the primary function of the MCP2030AT-I/SL in a PKE system?

The MCP2030AT-I/SL serves as the LF initiator analog front-end in passive keyless entry systems, generating the 125 kHz carrier field, receiving and demodulating backscattered signals from the key fob, and validating signal integrity via RSSI and programmable output enable filters. Its 1 mV_PP sensitivity and three-channel architecture enable reliable detection regardless of fob orientation - a core requirement for seamless PKE user experience. The MCP2030AT-I/SL is explicitly designed for this initiator role in automotive security applications.

Does the MCP2030AT-I/SL support batteryless operation, and how is it implemented?

Yes, the MCP2030AT-I/SL supports batteryless operation using external energy-harvesting circuitry - such as rectified antenna voltage or supercapacitor charging - as specified in Section 4.0 of the datasheet. It achieves this through ultra-low standby current (4 µA with three channels enabled) and flexible power management modes (Sleep, Standby, Active). The MCP2030AT-I/SL does not include on-chip energy storage but is architected to interface directly with external capacitor-based power sources, enabling maintenance-free TPMS and access control readers.

How does the programmable tuning capacitance benefit LC antenna design?

The MCP2030AT-I/SL provides 63 pF of per-channel programmable tuning capacitance (1 pF/step) to compensate for manufacturing tolerances in external LC antennas and temperature-induced resonance drift. This eliminates the need for manual capacitor selection or post-production trimming, reducing calibration time and improving yield. In practice, designers configure registers to fine-tune resonance precisely to 125 kHz across all three axes - ensuring consistent read range and omnidirectional performance. This capability is integral to the MCP2030AT-I/SL's role in production automotive systems.

What output options are available on the LFDATA/CCLK/SDIO pin, and how are they selected?

The LFDATA/CCLK/SDIO pin (Pin 6) offers three mutually exclusive output modes: demodulated NRZ data, divided carrier clock (÷1 or ÷4), or SPI data I/O - selected via Configuration Register bits. When CS = high, the pin outputs either demodulated data or carrier clock based on register settings; when CS = low, it functions as bidirectional SPI data (SDIO). This multiplexing reduces pin count while maintaining full functionality. All modes are supported natively by the MCP2030AT-I/SL without external logic or mode-select resistors.

Is the MCP2030AT-I/SL pin-compatible with other Microchip AFEs like the MCP2031 or PIC16F639?

No, the MCP2030AT-I/SL is not pin-compatible with the MCP2031 or PIC16F639. While the PIC16F639 integrates the MCP2030 AFE block alongside an MCU core, its pinout differs significantly (e.g., added I/O, reset, oscillator pins). The MCP2031 is a different-generation device with distinct package, pin assignment, and register map. The MCP2030AT-I/SL has a unique 14-pin SOIC layout defined in DS21981B, and substitution requires PCB redesign. Always verify pin mapping against the official MCP2030AT-I/SL datasheet before board layout.

MCP2030AT-I/SL Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Passive Entry/Start, TPMS

Frequency:: 125kHz

Standards:: -

Interface:: SPI

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

MCP2030AT-I/SL FAQ

1.How can I place an order for MCP2030AT-I/SL through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP2030AT-I/SL 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 MCP2030AT-I/SL reliable?

The price and inventory of MCP2030AT-I/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP2030AT-I/SL is usually 5 days.

3.What payment methods are accepted for MCP2030AT-I/SL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP2030AT-I/SL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP2030AT-I/SL?

MCP2030AT-I/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP2030AT-I/SL 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 MCP2030AT-I/SL?

For technical support, including MCP2030AT-I/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP2030AT-I/SL requirements.

6.How does Aetrix verify that MCP2030AT-I/SL is sourced from the original manufacturer or authorized distributors?

All MCP2030AT-I/SL 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 MCP2030AT-I/SL meets industry standards.

7.What is the process for return or replacement of MCP2030AT-I/SL?

All MCP2030AT-I/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP2030AT-I/SL, 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 MCP2030AT-I/SL part is unused and in its original packaging.

Return procedure for MCP2030AT-I/SL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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