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Microchip Technology MCP23017T-E/MLVAO
- Part No.:
- MCP23017T-E/MLVAO
- Manufacturer:
- Microchip Technology
- Category:
- I/O Expanders
- Package:
- 28-VQFN Exposed Pad
- Datasheet:
-
MCP23017T-E/MLVAO.pdf
- Description:
- 16-BIT INPUT/OUTPUT EXPANDER, I2
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP23017T-E/MLVAO from Microchip Technology is a 16-bit I²C-compatible GPIO expander with dual 8-bit ports (PORTA and PORTB), supporting up to 1.7 MHz I²C bus speed, 1.8V–5.5V operation, and AEC-Q100 qualification for automotive applications. It provides configurable interrupt outputs (INTA/INTB), internal weak pull-ups (75 µA typical at 5V), and hardware address pins (A0–A2) enabling up to eight devices on one bus.
For engineers reviewing the MCP23017T-E/MLVAO datasheet, MCP23017T-E/MLVAO pinout, MCP23017T-E/MLVAO application, or MCP23017T-E/MLVAO equivalent, key selection considerations include I²C interface compatibility, 16-bit bidirectional I/O expansion capability, interrupt-on-change functionality, low standby current (1 µA max), and QFN-28 package thermal performance in space-constrained automotive and industrial control designs.
Technical Context
The MCP23017T-E/MLVAO implements a register-mapped I²C slave architecture with 22 configurable registers-including IODIR, GPIO, OLAT, IPOL, GPINTEN, INTCON, and IOCON-enabling per-pin direction, polarity, interrupt source, and debounce configuration. Its dual-port structure supports independent or OR'ed interrupt generation via INTA and INTB, each configurable as active-high, active-low, or open-drain.
It features a hardware reset input, glitch-filtered GPIO inputs (150 ns filter), and precise timing parameters: 0.12 µs minimum SCL high time at 1.7 MHz mode (4.5–5.5V), 600 ns INT pin disable time, and 450 ns GPIO input-to-register propagation. The device operates across –40°C to +125°C with VDD = 4.5–5.5V, meeting automotive-grade reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Speed | Up to 1.7 MHz (4.5–5.5V); enables high-throughput peripheral expansion without CPU polling overhead |
| Supply Voltage | 1.8V–5.5V; supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers |
| Standby Current | 1 µA max (–40°C to +85°C); critical for battery-powered automotive modules and low-power IoT edge nodes |
| Interrupt Outputs | Two independent/open-drain INTA/INTB pins with programmable polarity and source (change vs. DEFVAL match) |
| GPIO Drive Strength | 25 mA sink/source per pin; sufficient to directly drive LEDs, small relays, or logic-level MOSFET gates |
| Hardware Addressing | Three address pins (A0–A2); allows up to eight identical devices on same I²C bus without software arbitration |
| Operating Temp | –40°C to +125°C (4.5–5.5V); qualified for under-hood automotive ECUs and industrial motor drives |
Pinout & Package
Package: 28-pin QFN, 6 × 6 mm body with exposed thermal pad (EP) - optimized for thermal dissipation in compact automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GPA0–GPA7 | Port A bidirectional I/O | All pins configurable as input/output; GPA7 output-only in MCP23017 variant |
| GPB0–GPB7 | Port B bidirectional I/O | All pins fully bidirectional; support interrupt-on-change and internal weak pull-up |
| SDA | I²C data line | Open-drain, Schmitt-trigger input; requires external pull-up; supports 400 pF bus capacitance |
| SCL | I²C clock line | Input only; Schmitt-trigger; 135 pF load spec; 1.7 MHz max at 4.5–5.5V |
| A0–A2 | Hardware address inputs | TTL-buffered; determine 3-bit I²C slave address (0x20–0x27); must be externally biased |
| INTA / INTB | Interrupt outputs | Active-low by default; configurable as active-high or open-drain; support independent or OR'ed operation |
| RESET | Active-low hardware reset | Asynchronous reset; releases after VDD exceeds VPOR (~VSS) and rise rate ≥0.05 V/ms |
| VDD / VSS | Power supply / ground | Supports wide voltage range; EP pad must be connected to VSS for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit I/O expansion | Two independent 8-bit ports (PORTA/PORTB) with bank-selectable 8-bit or unified 16-bit addressing |
| Configurable interrupt logic | INTA/INTB can operate independently or be logically OR'ed; reduces host polling and ISR complexity |
| Interrupt capture register | INTCAPA/B latches port state at interrupt trigger time-enables reliable edge detection without race conditions |
| Polarity inversion | IPOLA/B registers invert input data before comparison-simplifies firmware handling of active-low sensors/switches |
| Glitch filtering | 150 ns input filter on all GPIO pins-rejects EMI-induced noise in automotive and industrial environments |
| Power-on reset stability | On-chip POR ensures deterministic initialization; meets automotive reset timing specs (TRSTL ≥1 µs) |
Applications
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Adding 16 digital inputs/outputs to a CAN-based BCM for door lock status, mirror position, and interior lighting control. IC Role / Device Role / Timing Role: I²C slave GPIO expander providing isolated, interrupt-driven sensing and actuation interface between MCU and vehicle peripherals. Use Value: Reduces MCU pin count pressure while enabling fast interrupt response (<600 ns INT disable) for safety-critical door latch monitoring. | Use Scenario: Extending digital I/O capacity of a Cortex-M7-based PLC controller to manage 32+ discrete sensors and actuators in factory automation. IC Role / Device Role / Timing Role: High-reliability remote I/O node with AEC-Q100 qualification and –40°C to +125°C operation for harsh industrial environments. Use Value: Enables hot-swappable I/O modules using shared I²C backplane with up to eight MCP23017T-E/MLVAO devices per segment. |
| Smart Home Hub Interface | Medical Device Panel Control |
Use Scenario: Driving LED indicators and reading tactile button states on a Wi-Fi-enabled smart home gateway with limited MCU GPIO resources. IC Role / Device Role / Timing Role: Low-power I²C peripheral managing human-interface signals with configurable pull-ups and interrupt-on-change wake capability. Use Value: Achieves <1 µA standby current during sleep mode while maintaining responsive button press detection via INTA/INTB. | Use Scenario: Isolating front-panel pushbuttons, status LEDs, and alarm buzzers in a Class II medical device requiring EMC robustness and fail-safe behavior. IC Role / Device Role / Timing Role: Safety-assisted GPIO expander with glitch-filtered inputs and deterministic reset recovery for IEC 60601-1 compliance. Use Value: Internal weak pull-ups (75 µA typ.) eliminate external resistors, reducing BOM count and improving layout reliability in compact medical enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I/O expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9555D,118 | 16-bit I²C expander (NXP); 400 kHz max I²C speed; no AEC-Q100 qualification; 100 µA standby current | Targeted at commercial consumer electronics-not suitable for automotive or extended temperature industrial use | Select when cost sensitivity outweighs automotive qualification and ultra-low power needs |
| TCA6424ARGJR | 24-bit I²C expander (TI); 1 MHz max speed; integrated level-shifting; 10 µA standby; no glitch filter | Designed for multi-voltage system interfacing (1.65–5.5V); lacks automotive temp range and noise immunity features | Prefer for mixed-voltage SoC interfaces where 24-bit width and level shift matter more than EMI resilience |
Compared with PCA9555D,118 and TCA6424ARGJR, the MCP23017T-E/MLVAO delivers superior automotive readiness (AEC-Q100, –40°C to +125°C), lowest standby current (1 µA), and hardware-level noise rejection (150 ns glitch filter), making it the optimal choice for safety-critical and battery-sensitive embedded systems.
Availability
MCP23017T-E/MLVAO is available at Aetrix Electronics and suitable for automotive body control, industrial PLC expansion, smart home hub interfaces, and medical panel control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP23017T-E/MLVAO 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, analog, FPGA, and connectivity solutions, serving automotive, industrial, communications, and consumer markets with high-reliability silicon and development tools.
The MCP23017T-E/MLVAO belongs to Microchip's MCP23X17 family of I/O expanders, designed specifically to offload GPIO resource constraints in automotive ECUs and industrial controllers while delivering AEC-Q100-compliant timing, interrupt, and power performance.
FAQ
What is the maximum I²C clock frequency supported by the MCP23017T-E/MLVAO?
The MCP23017T-E/MLVAO supports three I²C speed modes: 100 kHz, 400 kHz, and up to 1.7 MHz. The 1.7 MHz mode requires VDD between 4.5V and 5.5V and is validated for operation at –40°C to +125°C. At lower voltages (1.8–2.6V), only 100 kHz mode is guaranteed. This scalability allows the MCP23017T-E/MLVAO to adapt to both legacy and high-speed I²C systems without changing firmware logic.
Does the MCP23017T-E/MLVAO support true bidirectional I/O on all 16 pins?
No-the MCP23017T-E/MLVAO supports full bidirectionality on GPB0–GPB7 and GPA0–GPA6, but GPA7 is output-only. This limitation is inherent to the MCP23017 variant (as opposed to MCP23S17). All 16 pins can be individually configured as inputs or outputs via the IODIRA/B registers, but GPA7 cannot function as an input. This design choice maintains compatibility with legacy 16-bit port abstractions while reserving GPA7 for dedicated output functions like status signaling.
How does the interrupt system of the MCP23017T-E/MLVAO work with two interrupt pins (INTA and INTB)?
The MCP23017T-E/MLVAO provides two physically separate interrupt outputs-INTA for PORTA and INTB for PORTB-that can be configured independently (e.g., INTA active-low, INTB open-drain) or logically OR'ed together via the IOCON.MIRROR bit. When MIRROR = 1, both pins reflect the combined interrupt condition of either port, simplifying host-side interrupt handling. Each pin's behavior is controlled by IOCON.INTPOL (active polarity) and IOCON.ODR (open-drain enable), giving designers flexibility in matching existing MCU interrupt controller requirements.
What is the purpose of the EXPOSED THERMAL PAD (EP) on the MCP23017T-E/MLVAO QFN package?
The exposed thermal pad (EP) on the MCP23017T-E/MLVAO QFN-28 package must be electrically and thermally connected to VSS (ground plane) on the PCB to ensure proper heat dissipation and electrical stability. Per Microchip's DS20001952D, leaving the EP unconnected or floating degrades thermal performance and may cause signal integrity issues due to increased package inductance. A solid copper pour tied to VSS with multiple thermal vias is required for reliable operation in automotive and industrial applications where ambient temperatures reach +125°C.
Can the MCP23017T-E/MLVAO operate reliably at 1.8V supply voltage across its full temperature range?
Yes-the MCP23017T-E/MLVAO is fully specified for 1.8V–5.5V operation from –40°C to +85°C. At 1.8V, it supports 100 kHz I²C mode and retains all core functionality including GPIO control, interrupt generation, and register access. However, the extended temperature range (–40°C to +125°C) requires VDD ≥4.5V per Electrical Characteristics Table D001. Therefore, 1.8V operation is valid only within the commercial/industrial grade range, not the full automotive grade.
MCP23017T-E/MLVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Number of I/O:
- 16
- Interface:
- I2C
- Interrupt Output:
- Yes
- Features:
- POR
- Output Type:
- Open Drain
- Current - Output Source/Sink:
- 25mA
- Clock Frequency:
- 1.7 MHz
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (6x6)
MCP23017T-E/MLVAO FAQ
1.How can I place an order for MCP23017T-E/MLVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP23017T-E/MLVAO 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 MCP23017T-E/MLVAO reliable?
The price and inventory of MCP23017T-E/MLVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP23017T-E/MLVAO is usually 5 days.
3.What payment methods are accepted for MCP23017T-E/MLVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP23017T-E/MLVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP23017T-E/MLVAO?
MCP23017T-E/MLVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP23017T-E/MLVAO 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 MCP23017T-E/MLVAO?
For technical support, including MCP23017T-E/MLVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP23017T-E/MLVAO requirements.
6.How does Aetrix verify that MCP23017T-E/MLVAO is sourced from the original manufacturer or authorized distributors?
All MCP23017T-E/MLVAO 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 MCP23017T-E/MLVAO meets industry standards.
7.What is the process for return or replacement of MCP23017T-E/MLVAO?
All MCP23017T-E/MLVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP23017T-E/MLVAO, 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 MCP23017T-E/MLVAO part is unused and in its original packaging.
Return procedure for MCP23017T-E/MLVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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