MCP23016-I/ML Equivalent & Substitute Parts

Part Overview

The MCP23016-I/ML is a 16-bit I/O expander interface circuit manufactured by Microchip Technology, operating at 400 kHz via I2C protocol. This device is classified as Active product status and is ROHS3 compliant. The MCP23016-I/ML is supplied in 28-QFN (6x6) surface mount packaging with tube packaging format. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the I2C interface expander category, particularly when original stock availability is limited or alternative packaging formats are required for specific assembly processes.

Substiute Parts

MCP23016-I/ML

Microchip TechnologyIn Stock: 2045MCP23016-I/ML Datasheet

Current PartRFQ

MCP23016T-I/ML

Microchip TechnologyIn Stock: 3798MCP23016T-I/ML Datasheet

DirectRFQ

TCA6416APWR

Texas InstrumentsIn Stock: 35472TCA6416APWR Datasheet

MFR RecommendedRFQ

TCA6416ARTWR

Texas InstrumentsIn Stock: 43146TCA6416ARTWR Datasheet

MFR RecommendedRFQ

TCA9535DBT

Texas InstrumentsIn Stock: 65370TCA9535DBT Datasheet

MFR RecommendedRFQ

TCA9535RTWR

Texas InstrumentsIn Stock: 2250TCA9535RTWR Datasheet

MFR RecommendedRFQ

TCA9539PWR

Texas InstrumentsIn Stock: 61089TCA9539PWR Datasheet

MFR RecommendedRFQ

TCA9539RGER

Texas InstrumentsIn Stock: 2142TCA9539RGER Datasheet

MFR RecommendedRFQ

TCA9539RTWR

Texas InstrumentsIn Stock: 4390TCA9539RTWR Datasheet

MFR RecommendedRFQ

TCA9555DBT

Texas InstrumentsIn Stock: 2314TCA9555DBT Datasheet

MFR RecommendedRFQ

TCA9555PWR

Texas InstrumentsIn Stock: 55618TCA9555PWR Datasheet

MFR RecommendedRFQ

TCA9555RGER

Texas InstrumentsIn Stock: 3058TCA9555RGER Datasheet

MFR RecommendedRFQ

TCA9555RTWR

Texas InstrumentsIn Stock: 38632TCA9555RTWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCP23016-I/ML is determined by strict adherence to the following electrical and mechanical parameters:

Core Substitution Criteria:

• 16 I/O channels (fixed requirement)
• I2C interface protocol at 400 kHz clock frequency
• Push-Pull output configuration with interrupt output capability
• POR (Power-On Reset) feature
• Operating temperature range: -40°C to +85°C
• Supply voltage compatibility within 2V to 5.5V range
• Surface mount technology
• ROHS3 compliance and REACH unaffected status

Packaging Consideration: The MCP23016-I/ML uses 28-QFN (6x6) packaging. Substitute parts may employ alternative surface mount packages (24-TSSOP, 24-SSOP, 24-WQFN, 24-VQFN) provided the electrical specifications remain equivalent. Package differences require PCB layout redesign but do not affect functional compatibility when interface parameters are maintained.

Manufacturer Variants: Direct substitutes from Microchip Technology (MCP23016T-I/ML) differ only in packaging format (Tape & Reel versus Tube). Texas Instruments TCA series devices (TCA6416, TCA9535, TCA9539, TCA9555) meet all electrical criteria with extended supply voltage range (1.65V minimum) and equivalent I/O expansion functionality.

Parameter Comparison

Engineering Selection Recommendations

Microchip Direct Substitutes: MCP23016T-I/ML maintains identical electrical specifications and package format to the MCP23016-I/ML. The primary difference is packaging format (Tape & Reel versus Tube) and higher inventory availability (3750 units). Both devices carry Active product status, ROHS3 compliance, and REACH unaffected certification. Selection between these variants depends on assembly process requirements and supply chain logistics.

Texas Instruments TCA Series Alternatives: The TCA6416, TCA9535, TCA9539, and TCA9555 device families provide functional equivalence with extended supply voltage range (1.65V minimum versus 2V minimum). All substitute devices maintain 16 I/O configuration, 400 kHz I2C operation, push-pull output, interrupt capability, and POR feature. Texas Instruments devices add SMBus protocol compatibility. All substitute parts are ROHS3 compliant and REACH unaffected.

Package Selection Guidance:

• 24-TSSOP packages (TCA6416APWR, TCA9539PWR, TCA9555PWR) offer highest inventory levels and standard thermal characteristics
• 24-WQFN packages (TCA6416ARTWR, TCA9535RTWR, TCA9539RTWR) provide compact footprint in 4x4mm format
• 24-SSOP packages (TCA9535DBT, TCA9555DBT) support legacy PCB designs
• 24-VQFN package (TCA9539RGER) offers alternative compact option

All substitute parts are Active status products with current manufacturing support and full compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can TCA series devices directly replace MCP23016-I/ML without firmware modification? A: Yes. All TCA series substitutes maintain I2C protocol compatibility at 400 kHz, identical I/O count (16), push-pull output configuration, and interrupt output functionality. Register mapping and command structure are equivalent for standard I2C expander operations. PCB layout redesign is required due to package differences.

Q: What is the impact of extended supply voltage range (1.65V minimum) in TCA devices? A: The TCA series lower minimum supply voltage (1.65V versus 2V) provides additional design flexibility for low-power applications. Existing designs operating at 2V to 5.5V remain fully compatible. No circuit modifications are required when substituting into designs already within this voltage window.

Q: Are there functional differences between TCA6416, TCA9535, TCA9539, and TCA9555 base products? A: All four TCA base products maintain identical core specifications: 16 I/O, 400 kHz I2C, push-pull output, interrupt output, and POR feature. Differences exist only in packaging variants and inventory availability. Selection should be based on PCB layout requirements and supply chain availability.

Q: Does SMBus compatibility in TCA devices affect I2C-only designs? A: No. SMBus is a superset of I2C protocol. Devices with SMBus support operate fully in I2C mode without modification. Existing I2C firmware and hardware designs function identically on TCA substitutes.

Q: What packaging considerations apply when switching from 28-QFN to 24-TSSOP or 24-WQFN? A: Package changes require PCB layout redesign including footprint modification, trace routing, and via placement. Pin count reduction (28 to 24) reflects different pin assignment architecture. Electrical functionality remains equivalent. Assembly process parameters (reflow profile, solder paste) may require adjustment based on package thermal characteristics.

Q: Are all substitute parts qualified for -40°C to +85°C operating temperature range? A: Yes. All listed substitute parts maintain the full -40°C to +85°C operating temperature specification. All devices are ROHS3 compliant with appropriate moisture sensitivity levels for their respective packaging formats.

Q: Which substitute offers highest inventory availability? A: TCA9535DBT provides highest inventory (65354 units). TCA6416ARTWR offers second-highest availability (43097 units). Both maintain full electrical equivalence to MCP23016-I/ML with package format differences.