I/O Expanders
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.
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PCA9534 Tape & Reel (TR) Active I2C SMBus io expander 2.5/5V 10.3mm 400kHz 10mA 25mA
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | PCA9534D,118 | 64 | 1 | Cut Tape | USD | ||||||||
| Avnet | 52AH1084 | 64 | 1 | USD | 20h | ||||||||
| Rochester Electronics | PCA9534D,118 | 1,938 | USD | 18h | |||||||||
| Verical | PCA9534D,118 | 950 | 278 | USD | |||||||||
| DigiKey | 568-1833-1-ND | 676 | 1 | Cut Tape | USD |
I2C/SMBus Interface 100kHz/400kHz 5.5V 16-Pin TSSOP T/R
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | PCAL9554BPWJ | 50 | 1 | Cut Tape | USD | ||||||||
| Avnet | 75X0105 | 50 | 1 | USD | 20h | ||||||||
| Verical | PCAL9554BPWJ | 2,384 | 2 | USD | |||||||||
| Arrow Electronics | PCAL9554BPWJ | 2,384 | 1 | USD | |||||||||
| Flip Electronics | PCAL9554BPWJ | 17,500 | >1wk |
PCA9535 Series 5.5 V 16-bit I2C-bus & SMBus Low Power I/O Port w/ Interrupt-SO24
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | PCA9535D,118 | 5,889 | 1 | Cut Tape | USD | ||||||||
| Rochester Electronics | PCA9535D,118 | 4,944 | USD | 18h | |||||||||
| Verical | PCA9535D,118 | 7 | 2 | USD | |||||||||
| Arrow Electronics | PCA9535D,118 | 9,290 | 1 | USD | |||||||||
| Avnet | PCA9535D,118 | 0 | 1K | USD | 20h |
PCA8574 Series 5.5V Remote 8-bit I/O Expander for I2C-bus with Interrupt-SOIC-16
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | PCA8574D,518 | 0 | 2K | Cut Tape | USD | ||||||||
| Future Electronics | PCA8574D,518 | 0 | 1K | Tape & Reel | USD | ||||||||
| Avnet | PCA8574D,518 | 0 | 1K | USD | 20h | ||||||||
| Arrow Electronics | PCA8574D,518 | 0 | 1K | USD | |||||||||
| Farnell | PCA8574D,518 | 0 | 1 | Cut Tape | USD* | 4h |
PCA9554 Series 5.5 V 85 mA 400 kHz 8-bit I2C-bus and SMBus I/O Port - SOIC-16
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avnet | PCA9554D,118 | 4,136 | 432 | USD | 20h | ||||||||
| Flip Electronics | PCA9554D,118 | 136 | >1wk | ||||||||||
| Newark | PCA9554D,118 | 0 | 1 | USD | |||||||||
| Future Electronics | PCA9554D,118 | 0 | 1K | Tape & Reel | USD | ||||||||
| Arrow Electronics | PCA9554D,118 | 0 | 1K | USD |
Fixed Resistor, Thin Film, 0.125W, 14300ohm, 150V, 0.1% +/-Tol, 25ppm/Cel, Surface Mount, 1206
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rochester Electronics | PCA9554ABS3,118 | 122 | USD | 18h | |||||||||
| UnikeyIC | PCA9554ABS3,118 | 4,845 | 1 | Tape & Reel | USD | 2d | |||||||
| DigiKey | 568-5928-1-ND | 1,400 | 1 | Cut Tape | USD | ||||||||
| Newark | PCA9554ABS3,118 | 0 | 12K | Tape & Reel | |||||||||
| Avnet | PCA9554ABS3,118 | 0 | 6K | USD | 20h |
PCA9575 Series 3.6 V 400 kHz 200 uA 16-Bit I/O Surface Mount I2C-Bus - TSSOP-24
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rochester Electronics | PCA9575PW1,118 | 1,184 | USD | 18h | |||||||||
| Arrow Electronics | PCA9575PW1,118 | 80 | 1 | USD | |||||||||
| Verical | PCA9575PW1,118 | 80 | 2 | USD | |||||||||
| Newark | PCA9575PW1,118 | 0 | 5K | Tape & Reel | USD | ||||||||
| Avnet | PCA9575PW1,118 | 0 | 2500 | USD | 20h |
PCA9506 Series 40-Bit I2C-Bus I/O Port with RESET OE and INT - HVQFN - 56
| Distributor | SKU | Min | Pkg | Bulk Pricing | Updated | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Newark | PCA9506BS,118 | 0 | 2K | Tape & Reel | USD | ||||||||
| Avnet | PCA9506BS,118 | 0 | 2K | USD | 20h | ||||||||
| Future Electronics | PCA9506BS,118 | 0 | 2K | Tape & Reel | USD | ||||||||
| Arrow Electronics | PCA9506BS,118 | 0 | 2K | USD | |||||||||
| Farnell | PCA9506BS,118 | 0 | 1 | Cut Tape | USD* | 4h |
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