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Microchip Technology MCP23009-E/MGVAO
- Part No.:
- MCP23009-E/MGVAO
- Manufacturer:
- Microchip Technology
- Category:
- I/O Expanders
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP23009-E/MGVAO.pdf
- Description:
- 8-BIT INPUT/OUTPUT EXPANDER, I2C
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
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Product details
Overview
MCP23009-E/MGVAO from Microchip Technology is an 8-bit I²C-compatible GPIO expander with open-drain outputs, AEC-Q100 qualified for automotive use, 1.8V–5.5V operation, and hardware-addressable configuration supporting up to eight devices on one bus.
For engineers reviewing the MCP23009-E/MGVAO datasheet, MCP23009-E/MGVAO pinout, MCP23009-E/MGVAO application, or MCP23009-E/MGVAO equivalent, key selection considerations include I²C interface speed (up to 3.4 MHz), interrupt configurability (active-high/low/open-drain), 5.5V-tolerant inputs, and 25 mA sink capability per pin in industrial control, automotive body electronics, and embedded system I/O expansion.
Technical Context
The MCP23009-E/MGVAO implements an I²C slave interface with 7-bit addressing (four fixed + three hardware-configurable bits via ADDR pin), supports Byte and Sequential register access modes, and features a Flash ADC-based multi-bit address decoder enabling eight unique device addresses using a single analog voltage input.
Its GPIO architecture includes individually configurable direction (IODIR), polarity inversion (IPOL), interrupt-on-change (GPINTEN/INTCON/DEFVAL), internal pull-up resistors (GPPU), and interrupt capture (INTCAP) - all accessible through eleven dedicated 8-bit registers mapped to I²C addresses 00h–0Ah.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Speed | Up to 3.4 MHz - enables high-throughput peripheral control without CPU polling overhead. |
| Supply Voltage | 1.8V to 5.5V - supports direct interfacing with mixed-voltage systems including 3.3V and 5V microcontrollers. |
| Input Tolerance | 5.5V tolerant - allows safe connection to higher-voltage signals without level-shifting circuitry. |
| Sink Current | 25 mA per pin, 200 mA total - drives LEDs, relays, or logic inputs directly without external buffers. |
| Interrupt Output | Configurable active-high, active-low, or open-drain - simplifies integration with diverse host interrupt controllers. |
| Standby Current | 1 µA at –40°C to +85°C - minimizes power draw in battery-backed or low-power sleep states. |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - validated for automotive applications including cabin control modules and lighting systems. |
Pinout & Package
Package: 16-lead QFN (3 mm × 3 mm × 0.9 mm) with exposed thermal pad (EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 1.8V–5.5V system rail; powers internal logic and I/O drivers. |
| VSS | Ground reference | Primary return path for digital and I/O current; must be low-impedance. |
| SCL | I²C clock input | Accepts standard-mode (100 kHz), fast-mode (400 kHz), or high-speed (3.4 MHz) clock signals. |
| SDA | I²C bidirectional data | Open-drain I/O requiring external pull-up; shares bus with other I²C devices. |
| ADDR | Hardware address input | Analog voltage input decoded into 3-bit I²C address (A2:A0); enables up to eight devices on one bus. |
| RESET | Active-low hardware reset | Asynchronous reset that clears all registers to POR state; requires external pull-up. |
| INT | Interrupt output | Configurable push-pull or open-drain output signaling GPIO state changes to host controller. |
| GP0–GP7 | Bidirectional I/O pins | Each supports input, output, pull-up enable, polarity inversion, and interrupt-on-change independently. |
| EP | Exposed thermal pad | Optional connection to VSS for improved thermal dissipation; enhances reliability under sustained load. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Addressing via ADDR Pin | Single analog voltage sets full 3-bit I²C address - eliminates need for multiple address-select resistors or jumpers. |
| Interrupt Capture Register (INTCAP) | Latches exact GPIO port state at interrupt trigger time - enables deterministic fault logging without race conditions. |
| Configurable Interrupt Clearing | INTCC bit selects whether reading INTCAP or GPIO clears interrupt - supports flexible host software architectures. |
| Individual Pull-Up Enable (GPPU) | Per-pin internal pull-up resistor control - reduces BOM count and board space versus discrete resistors. |
| Input Polarity Inversion (IPOL) | Per-pin logic inversion of input data - simplifies firmware handling of inverted sensor or switch signals. |
Applications
| Automotive Body Control Module | Industrial HMI Panel |
|---|---|
Use Scenario: Centralized monitoring and actuation of door locks, window switches, mirror controls, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: I/O expander providing isolated, interrupt-driven GPIO extension for MCU with limited native pins. Use Value: AEC-Q100 qualification ensures reliability across temperature extremes; 5.5V-tolerant inputs interface directly with 12V-sensed switch signals. | Use Scenario: Adding tactile button inputs, LED status indicators, and relay outputs to compact factory-floor HMIs. IC Role / Device Role / Timing Role: Parallel I/O extension with configurable interrupts to reduce host polling latency and improve real-time responsiveness. Use Value: 25 mA sink per pin drives indicator LEDs directly; I²C speed up to 3.4 MHz supports rapid UI updates without bus contention. |
| Smart Home Gateway | Medical Device Front Panel |
Use Scenario: Managing low-voltage sensors (PIR, contact, temp) and control outputs (relays, solenoids) in residential automation hubs. IC Role / Device Role / Timing Role: Remote GPIO node communicating over I²C to main application processor with minimal pin usage. Use Value: Hardware address pin allows stacking eight expanders on one bus - scales I/O count without additional MCU pins or address decoding logic. | Use Scenario: Safe, reliable front-panel interface for diagnostic equipment requiring ESD-hardened, low-leakage inputs and fail-safe outputs. IC Role / Device Role / Timing Role: Isolated I/O buffer between user controls and safety-critical main controller. Use Value: 1 µA standby current extends battery life in portable diagnostics; open-drain outputs prevent back-driving during power sequencing. |
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; no hardware address pin (uses fixed A0/A1 pins); no AEC-Q100 qualification. | Higher channel count but lacks automotive qualification and flexible addressing - suited for non-automotive industrial use. | Select when 16-bit expansion is required and AEC-Q100 is not mandated. |
| TCA6408AIPWR | 8-bit I²C expander; uses 3-pin hardware address (A0–A2); no interrupt capture register; lower max I²C speed (1 MHz). | Lacks INTCAP and advanced interrupt configuration - limits diagnostic capability in fault-sensitive systems. | Choose for cost-sensitive, non-diagnostic applications where basic GPIO expansion suffices. |
Compared with PCA9555D,118 and TCA6408AIPWR, the MCP23009-E/MGVAO uniquely combines AEC-Q100 qualification, single-pin hardware addressing, interrupt capture, and 3.4 MHz I²C - making it optimal for automotive and safety-aware embedded I/O expansion where deterministic interrupt handling and qualification are mandatory.
Availability
MCP23009-E/MGVAO is available at Aetrix Electronics and suitable for automotive body electronics, industrial HMI panels, smart home gateways, and medical device front panels requiring stable component supply and long-term lifecycle support.
Supply support for MCP23009-E/MGVAO 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, consumer, and communications markets globally.
The MCP23X09 product line delivers robust, qualification-ready I/O expansion for resource-constrained embedded systems - designed specifically for automotive body electronics and industrial control where reliability, interrupt fidelity, and mixed-voltage interoperability are critical.
FAQ
What interface protocol does the MCP23009-E/MGVAO support?
The MCP23009-E/MGVAO supports only the I²C interface - not SPI. It operates at standard-mode (100 kHz), fast-mode (400 kHz), and high-speed mode (3.4 MHz). The related MCP23S09 variant supports SPI. This distinction is fundamental: MCP23009-E/MGVAO must be connected to an I²C bus with appropriate pull-ups on SCL and SDA lines.
How is the I²C address set on the MCP23009-E/MGVAO?
The MCP23009-E/MGVAO uses a single analog ADDR pin to configure its 3-bit I²C address (A2:A0) via an internal Flash ADC. Applying a specific voltage (e.g., 0.338V for address 0x21 at VDD = 2.7V) selects one of eight possible addresses. This eliminates the need for multiple address-select resistors and simplifies board layout compared to traditional A0/A1/A2 schemes.
Does the MCP23009-E/MGVAO support interrupt-on-change functionality?
Yes, the MCP23009-E/MGVAO supports fully configurable interrupt-on-change. Each GP0–GP7 pin can be individually enabled for interrupt generation via GPINTEN, with comparison against either the previous state or a user-defined DEFVAL register value (controlled by INTCON). The INT output is configurable as active-high, active-low, or open-drain.
What is the purpose of the INTCAP register in the MCP23009-E/MGVAO?
The INTCAP register in the MCP23009-E/MGVAO captures and holds the exact GPIO port state at the moment an interrupt occurs. This read-only register provides deterministic visibility into the triggering condition - essential for debugging, fault logging, and avoiding race conditions when the port state changes rapidly after interrupt assertion.
Can the MCP23009-E/MGVAO drive LEDs directly?
Yes, the MCP23009-E/MGVAO can drive LEDs directly using its open-drain outputs, which support up to 25 mA sink current per pin and 200 mA total. When configured as outputs, each GPx pin can sink current from a VDD-supplied LED anode. Ensure total current remains within 200 mA and thermal limits - especially in the 3×3 mm QFN package.
MCP23009-E/MGVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Number of I/O:
- 8
- Interface:
- I2C
- Interrupt Output:
- Yes
- Features:
- POR
- Output Type:
- Open Drain
- Current - Output Source/Sink:
- 25mA
- Clock Frequency:
- 3.4 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:
- 16-QFN (3x3)
MCP23009-E/MGVAO FAQ
1.How can I place an order for MCP23009-E/MGVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP23009-E/MGVAO 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 MCP23009-E/MGVAO reliable?
The price and inventory of MCP23009-E/MGVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP23009-E/MGVAO is usually 5 days.
3.What payment methods are accepted for MCP23009-E/MGVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP23009-E/MGVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP23009-E/MGVAO?
MCP23009-E/MGVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP23009-E/MGVAO 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 MCP23009-E/MGVAO?
For technical support, including MCP23009-E/MGVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP23009-E/MGVAO requirements.
6.How does Aetrix verify that MCP23009-E/MGVAO is sourced from the original manufacturer or authorized distributors?
All MCP23009-E/MGVAO 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 MCP23009-E/MGVAO meets industry standards.
7.What is the process for return or replacement of MCP23009-E/MGVAO?
All MCP23009-E/MGVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP23009-E/MGVAO, 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 MCP23009-E/MGVAO part is unused and in its original packaging.
Return procedure for MCP23009-E/MGVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP23009-E/MGVAO Tags
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