Microchip I/O Expander SPI 18-Pin QFN, MCP23S18T-E/MJ

View all I/O Expanders

Subtotal (1 reel of 3300 units)*

$15,731.10

(exc. GST)

$17,305.20

(inc. GST)

Add to Basket
Select or type quantity
New product - Preorder today
  • Shipping from 12 January 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
Per Reel*
3300 +$4.767$15,731.10

*price indicative

RS Stock No.:
333-051
Mfr. Part No.:
MCP23S18T-E/MJ
Brand:
Microchip
Find similar products by selecting one or more attributes.
Select all

Brand

Microchip

Interface

SPI

Number of Pins

18

Package Type

QFN

The Microchip 6 bit general purpose parallel I/O expansion for I2C bus or SPI applications. It consists of multiple 8 bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits. The data for each input or output is kept in the corresponding input or output register. The polarity of the input port register can be inverted with the polarity inversion register.

16 bit remote bidirectional I/O port
25 mA sink
400 mA total current out
Low standby current as low as 1 μA
High speed I2C™ interface up to 3.4MHz

Related links