MCP23S18 Series

16-Bit SPI I/O Expander with Open-Drain Output

Catalog

16-Bit SPI I/O Expander with Open-Drain Output

Part	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output Source/Sink	Mounting Type	Output Type	Package / Case	Package / Case	Package / Case	Interface	Voltage - Supply [Min]	Voltage - Supply [Max]	Number of I/O	Supplier Device Package	Clock Frequency	Grade	Features	Qualification	Package / Case [x]	Package / Case [y]
Microchip Technology MCP23S18-E/SP	125 °C	-40 °C	25 mA	Through Hole	Open Drain	0.3 in	28-DIP	7.62 mm	SPI	1.8 V	5.5 V	16	28-SPDIP	10 MHz
Microchip Technology MCP23S18T-E/MJVAO	125 °C	-40 °C	25 mA	Surface Mount	Open Drain		24-VFQFN Exposed Pad		SPI	1.8 V	5.5 V	16	24-QFN (4x4)	10 MHz	Automotive	POR	AEC-Q100
Microchip Technology MCP23S18-E/SO	125 °C	-40 °C	25 mA	Surface Mount	Open Drain		28-SOIC		SPI	1.8 V	5.5 V	16	28-SOIC	10 MHz				0.295 in	7.5 mm
Microchip Technology MCP23S18-E/MJ	125 °C	-40 °C	25 mA	Surface Mount	Open Drain		24-VFQFN Exposed Pad		SPI	1.8 V	5.5 V	16	24-QFN (4x4)	10 MHz

Catalog

16-Bit SPI I/O Expander with Open-Drain Output

Key Features

• * 16-bit remote bidirectional I/O port

• * Open-drain outputs:

• * 5.5V tolerant

• * 25 mA sink

• * 400 mA total current out

• * Low standby current as low as 1 µA

• * High-speed I2C™ interface up to 3.4MHz

• * Single hardware address pin: Voltage input to allow up to eight devices on the bus

• * Configurable interrupt output pins: Configurable as active-high, active-low or open-drain

• * Low standby current:1 µA (typ.)

Description

The MCP23X18 device provides 16-bit, general purpose parallel I/O expansion for I2C bus or SPI applications. The two devices differ only in the serial interface. • MCP23018 - I2C interface • MCP23S18 - SPI interface The MCP23X18 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. All registers can be read by the system master.