ICs for increasing input/output capacity in microcontroller-based systems
I/O expanders add extra digital inputs and outputs to microcontrollers and processors without needing more pins. An I/O expander is ideal for applications like keypads, LEDs, and sensors where pin count is limited but flexibility is key. Integrated I/O expanders connect over I2C, SPI, or serial interfaces to streamline board layout and simplify wiring. Use Octopart to quickly find the I/O expander ICs or other interface components you need. You can then compare suppliers, view datasheets, and check real-time pricing and availability.
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | MCP23S18-E/SP | 554 | 1 | USD | |||||||||
| Onlinecomponents.com | MCP23S18-E/SP | 585 | 15 | Bulk | USD | ||||||||
| Master Electronics | MCP23S18-E/SP | 585 | 15 | USD | |||||||||
| DigiKey | MCP23S18-E/SP-ND | 54 | 1 | Tube | USD | ||||||||
| NAC Semi | MCHP00000015975 | 1560 | 180 | USD | 1d |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | MCP23S09-E/P | 50 | 1 | USD | |||||||||
| DigiKey | MCP23S09-E/P-ND | 193 | 1 | Tube | USD | ||||||||
| TME | MCP23S09-E/P | 181 | 1 | USD | 16h | ||||||||
| NAC Semi | MCHP00000015962 | 2800 | 250 | USD | 1d | ||||||||
| Microchip | MCP23S09-E/P | 3500 | 1 | Tube | USD | 1h |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Onlinecomponents.com | 2746087 | 198 | 1 | Bulk | USD | ||||||||
| Master Electronics | 2746087 | 198 | 1 | USD | |||||||||
| Verical | 2746087 | 192 | 2 | USD | |||||||||
| DigiKey | 277-17300-ND | 506 | 1 | Bulk | USD | ||||||||
| Airline Hydraulics | PHOENIX 2746087 | 0 | 66 | USD | 14h |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | MCP23017-E/SS | 23 | 1 | USD | |||||||||
| Future Electronics | MCP23017-E/SS | 463 | 20 | Tube | USD | ||||||||
| Avnet | MCP23017-E/SS | 370 | 1 | USD | 20h | ||||||||
| Onlinecomponents.com | MCP23017-E/SS | 1042 | 47 | Bulk | USD | ||||||||
| Arrow Electronics | MCP23017-E/SS | 1990 | 1 | USD |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | MCP23017-E/SO | 105 | 1 | USD | |||||||||
| Future Electronics | MCP23017-E/SO | 205 | 20 | Tube | USD | ||||||||
| Avnet | MCP23017-E/SO | 6 | 27 | USD | 20h | ||||||||
| Onlinecomponents.com | MCP23017-E/SO | 3645 | 27 | Bulk | USD | ||||||||
| RS (Formerly Allied Electronics) | MCP23017-E/SO | 337 | 1 | Bulk | USD | 7h |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Onlinecomponents.com | MCP25050-I/SL | 711 | 57 | Bulk | USD | ||||||||
| Master Electronics | MCP25050-I/SL | 711 | 57 | USD | |||||||||
| DigiKey | MCP25050-I/SL-ND | 120 | 1 | Tube | USD | ||||||||
| TME | MCP25050-I/SL | 0 | 1 | USD | 8h | ||||||||
| Microchip | MCP25050-I/SL | 34 | 1 | Tube | USD | 1h |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | MCP23S08T-E/SO | 1100 | 1 | Cut Tape | USD | ||||||||
| Onlinecomponents.com | MCP23S08T-E/SO | 2730 | 250 | Bulk | USD | ||||||||
| Master Electronics | MCP23S08T-E/SO | 2730 | 250 | USD | |||||||||
| Arrow Electronics | MCP23S08T-E/SO | 1190 | 1 | USD | |||||||||
| DigiKey | MCP23S08T-E/SOCT-ND | 3806 | 1 | Cut Tape | USD |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avnet | MCP23018T-E/MJ | 3300 | 3300 | USD | 20h | ||||||||
| Onlinecomponents.com | MCP23018T-E/MJ | 3050 | 250 | Bulk | USD | ||||||||
| Master Electronics | MCP23018T-E/MJ | 3050 | 250 | USD | |||||||||
| DigiKey | MCP23018T-E/MJCT-ND | 8760 | 1 | Cut Tape | USD | ||||||||
| NAC Semi | MCHP00000015951 | 13.200 | 3300 | USD | 1d |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | MCP23008T-E/SO | 3369 | 1 | Cut Tape | USD | ||||||||
| Onlinecomponents.com | MCP23008T-E/SO | 3850 | 250 | Bulk | USD | ||||||||
| Master Electronics | MCP23008T-E/SO | 3850 | 250 | USD | |||||||||
| Arrow Electronics | MCP23008T-E/SO | 1097 | 1 | USD | |||||||||
| DigiKey | MCP23008T-E/SOCT-ND | 14.754 | 1 | Cut Tape | USD |
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DigiKey | MCP25020-I/P-ND | 47 | 1 | Tube | USD | ||||||||
| NAC Semi | MCHP00000015982 | 1680 | 120 | USD | 1d | ||||||||
| Microchip | MCP25020-I/P | 2100 | 1 | Tube | USD | 1h | |||||||
| Newark | MCP25020-I/P | 0 | 120 | USD | |||||||||
| Onlinecomponents.com | MCP25020-I/P | 0 | 30 | Bulk | USD |


