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Microchip Technology MCP2021T-500E/MDVAO
- Part No.:
- MCP2021T-500E/MDVAO
- Manufacturer:
- Microchip Technology
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MCP2021T-500E/MDVAO.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,383
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Product details
Overview
MCP2021T-500E/MDVAO from Microchip Technology is a LIN 2.1 and SAE J2602-2 compliant transceiver with integrated 5.0V ±3% LDO regulator (50 mA), 8-pin DFN package, -40°C to +125°C operation, 43V load dump protection, and wake-up on dominant LBUS level. It interfaces microcontrollers (e.g., PIC EUSART) to automotive LIN buses in body control modules.
For engineers reviewing the MCP2021T-500E/MDVAO datasheet, MCP2021T-500E/MDVAO pinout, MCP2021T-500E/MDVAO application, or MCP2021T-500E/MDVAO equivalent, key selection criteria include LIN bus compliance, integrated 5V regulator output stability, thermal shutdown behavior, low-power mode current (85 µA / 16 µA), and LBUS wake-up sensitivity.
Technical Context
The MCP2021T-500E/MDVAO implements a half-duplex, bidirectional LIN physical layer interface with slope-controlled LBUS edges for EMI reduction and a first-order 1 µs low-pass input filter for noise immunity. Its internal 30 kΩ pull-up between LBUS and VBB remains active in all modes.
It integrates an LDO voltage regulator delivering 5.0V ±3% at up to 50 mA, with short-circuit protection, thermal shutdown, and turn-off at VBB < 4.25V. Power management includes two low-power states: Receiver-On/Regulator-On (≈85 µA) and Bus-Monitoring/Regulator-Off (≈16 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | Meets LIN Bus Spec 1.3/2.1 and SAE J2602-2 - ensures interoperability in automotive networks |
| Regulator Output | 5.0V ±3% at 50 mA - powers MCU and peripherals without external LDO |
| Supply Range | 6.0V–18.0V continuous, 30V max - survives double-battery jumps and load dumps |
| Operating Temp | -40°C to +125°C - qualified for under-hood and chassis-mounted automotive use |
| Wake-up Trigger | Dominant LBUS level ≥20 µs - enables reliable node activation without edge timing dependency |
| Quiescent Current | 85 µA (RX on, TX off, VREG on) - supports always-on LIN slave nodes with low battery drain |
| EMI Performance | Meets stringent OEM radiated emission requirements - reduces need for external filtering |
Pinout & Package
Package: 8-pin 4×4 mm DFN with exposed thermal pad (EP), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RXD | CMOS Receive Data Output | Reflects LBUS state with 1 µs low-pass filtering - provides noise-immune digital signal to MCU |
| CS/LWAKE | TTL Chip Select / Local Wake Input | Pulled down internally; high level enables transmitter - prevents bus glitches during MCU boot |
| VREG | 5.0V Regulated Output | Stable 5V supply at 50 mA; turns off below 3.5V - enables clean POR for connected MCU |
| TXD | TTL Transmit Data Input | Drives LBUS low (dominant) when low; pulled up to VREG - simplifies MCU GPIO interface |
| VSS | Ground Reference | Common return for analog/digital/regulator circuits - must be connected to EP for optimal EMI/thermal performance |
| LBUS | Bidirectional LIN Bus Interface | Open-collector output with slope control and ground-short protection - meets LIN electrical layer requirements |
| VBB | Battery Supply Input | Input to LDO regulator; withstands 43V transients - accepts direct connection to vehicle battery rail |
| FAULT/TXE | Open-Drain Fault Output / TX Enable | Low = TX disabled due to fault or command; debounced sampling - enables bus contention detection and safe TX gating |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5V LDO regulator | Eliminates external regulator component count; ±3% tolerance over full temp range ensures reliable MCU operation |
| 43V load dump protection | Enables direct battery connection without external TVS in many designs - reduces BOM cost and board space |
| Dominant-level wake-up | Supports robust sleep/wake coordination in multi-node LIN clusters without requiring precise edge timing |
| Thermal shutdown with recovery | Protects against sustained bus shorts or overload; automatic restart after cooling avoids manual reset requirement |
| Very low EMI emissions | Meets OEM EMC specifications out-of-the-box - minimizes pre-compliance debug time and shielding costs |
Applications
| Body Control Module (BCM) | Seat Position Memory System |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting via LIN sub-network. IC Role / Device Role / Timing Role: LIN transceiver and local 5V power source for distributed slave nodes (e.g., door module MCUs). Use Value: Reduces wiring harness complexity and enables standardized communication with guaranteed timing per LIN schedule tables. | Use Scenario: Storing and recalling driver seat position using LIN-connected motor controllers and memory ICs. IC Role / Device Role / Timing Role: Physical layer interface and regulated 5V supply for seat ECU, enabling deterministic command/response latency. Use Value: Ensures reliable wake-up from sleep on LIN command and stable MCU operation during motor actuation bursts. |
| Roof Module with Sunroof Control | Steering Column Switch Interface |
Use Scenario: Managing sunroof open/close, tilt, and pinch detection via LIN-connected actuators and sensors. IC Role / Device Role / Timing Role: LIN bus interface with thermal protection for high-current motor drive scenarios. Use Value: Survives repeated motor stall conditions without latch-up; maintains communication during transient overloads. | Use Scenario: Aggregating button presses and rotary encoder signals from steering wheel switches onto LIN bus. IC Role / Device Role / Timing Role: Low-quiescent-current LIN node (16 µA monitoring mode) for always-on switch monitoring. Use Value: Enables immediate response to driver inputs while minimizing parasitic battery drain during vehicle sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN transceiver with integrated regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCAN1042VDQ1 | 5V regulator not integrated; requires external LDO; CAN FD capable (not LIN-specific) | Designed for CAN networks, not LIN; lacks dominant-level wake-up logic and LBUS-specific protection | Select only if migrating from LIN to CAN or adding dual-bus capability; not drop-in for LIN-only systems |
| SN65HVDA100QDRQ1 | 3.3V regulator only; no 5V option; higher quiescent current (120 µA in RX-on mode) | Targeted at infotainment and gateway nodes; lacks automotive-grade load dump rating (max 36V) | Use where 3.3V MCU supply is mandatory and 43V transient immunity is not required |
Compared with TCAN1042VDQ1 and SN65HVDA100QDRQ1, the MCP2021T-500E/MDVAO uniquely combines LIN-specific compliance, integrated 5V regulation, 43V load dump survival, and dominant-level wake-up - making it the only direct fit for cost-optimized, single-supply LIN slave nodes in harsh automotive environments.
Availability
MCP2021T-500E/MDVAO is available at Aetrix Electronics and suitable for automotive body electronics, seat control systems, and roof modules requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for MCP2021T-500E/MDVAO 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 microcontroller, mixed-signal, analog, and Flash-IP solutions for embedded control applications.
The MCP2021 family is designed specifically for automotive and industrial LIN network nodes, integrating physical layer transceivers with automotive-grade voltage regulators to simplify ECU design and improve system robustness.
FAQ
What LIN protocol versions does the MCP2021T-500E/MDVAO support?
The MCP2021T-500E/MDVAO supports LIN Bus Specification versions 1.3 and 2.1, and is compliant with SAE J2602-2. It is not compatible with LIN 2.2 or later revisions. This ensures interoperability with legacy and current-generation automotive LIN master and slave devices deployed in production vehicles since 2005. The MCP2021T-500E/MDVAO implements all mandatory electrical layer requirements including dominant/recessive voltage thresholds, slew rate control, and bus fault protection.
Does the MCP2021T-500E/MDVAO include an integrated voltage regulator, and what are its key specs?
Yes, the MCP2021T-500E/MDVAO integrates a low-dropout (LDO) voltage regulator delivering 5.0V ±3% at up to 50 mA over -40°C to +125°C. It features short-circuit current limiting (~100 mA), thermal shutdown, and turns off when VBB drops below ~4.25V. The regulator requires only an external ceramic or tantalum output capacitor (1.0–22 µF) for stability. This eliminates the need for an external 5V regulator in most LIN slave designs, directly powering connected MCUs such as PIC devices.
How does wake-up functionality work on the MCP2021T-500E/MDVAO?
The MCP2021T-500E/MDVAO wakes from Power-Down mode upon detection of a dominant-level LBUS signal lasting ≥20 µs - a level-sensitive trigger. This differs from the P-variant (e.g., MCP2021P-500), which uses falling-edge wake-up. The level-sensitive behavior allows reliable activation even with slow-rising bus transitions common in noisy automotive environments. Wake-up can also occur via assertion of the CS/LWAKE pin. The MCP2021T-500E/MDVAO does not require external components to enable this function.
What protection features does the MCP2021T-500E/MDVAO provide against automotive electrical faults?
The MCP2021T-500E/MDVAO provides 43V load dump protection on VBB, ground-short protection on LBUS, loss-of-ground detection, thermal shutdown, internal short-circuit current limiting, and ESD protection per component-level ratings. It survives double-battery jumps (24V) and reverse battery conditions when used with an external blocking diode. These protections are built into the silicon and require no additional external circuitry beyond recommended TVS diodes for >43V transients - ensuring robust operation in real-world vehicle electrical systems.
What are the low-power operating modes of the MCP2021T-500E/MDVAO, and their typical currents?
The MCP2021T-500E/MDVAO offers two defined low-power modes: (1) Receiver-On / Transmitter-Off / Regulator-On draws ≈85 µA - used when MCU needs continuous 5V supply and bus monitoring; (2) Bus-Monitoring / Transmitter-Off / Regulator-Off draws ≈16 µA - used for ultra-low-power wake-on-LIN applications where MCU is powered externally. Both modes retain LBUS wake-up capability. Current values are measured at 12V VBB and 25°C, and remain stable across the full -40°C to +125°C range.
MCP2021T-500E/MDVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Transceiver
- Protocol:
- LIN
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 175 mV
- Data Rate:
- 20kBaud
- Voltage - Supply:
- 6V ~ 18V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (4x4)
MCP2021T-500E/MDVAO FAQ
1.How can I place an order for MCP2021T-500E/MDVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP2021T-500E/MDVAO 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 MCP2021T-500E/MDVAO reliable?
The price and inventory of MCP2021T-500E/MDVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP2021T-500E/MDVAO is usually 5 days.
3.What payment methods are accepted for MCP2021T-500E/MDVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP2021T-500E/MDVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP2021T-500E/MDVAO?
MCP2021T-500E/MDVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP2021T-500E/MDVAO 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 MCP2021T-500E/MDVAO?
For technical support, including MCP2021T-500E/MDVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP2021T-500E/MDVAO requirements.
6.How does Aetrix verify that MCP2021T-500E/MDVAO is sourced from the original manufacturer or authorized distributors?
All MCP2021T-500E/MDVAO 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 MCP2021T-500E/MDVAO meets industry standards.
7.What is the process for return or replacement of MCP2021T-500E/MDVAO?
All MCP2021T-500E/MDVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP2021T-500E/MDVAO, 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 MCP2021T-500E/MDVAO part is unused and in its original packaging.
Return procedure for MCP2021T-500E/MDVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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