Series name	Master (center) IC	Slave (satellite) IC
Type	MKY36	MKY37
Package
Number of I/O	―	16DIN 16OUT
Supply voltage	3.3 V (5 V tolerant)	5.0 V
Features	16/8 bit bus Interface support	No CPU needed Basic model Low power consumption

* Click the model or package photo of a product to see details.

Series name	MEM mode IC (master/slave)	MEM mode IC (master/slave)	IO mode IC (DIO slave)	IO mode IC (DIO slave)
Type	MKY43	MKY44-SPI	MKY46	MKY44-IO32A
Package
Function	Data (memory) sharing	Data (memory) sharing	32 DIN/DOUT	32 DIN/DOUT with filter 2 ch 24 bit up/down counter (encoder) 2 ch 16bit PWM output
Supply voltage	3.3 V (5 V tolerant)	3.3 V	5.0 V	3.3 V
Features	Support mail function (256-byte data transmission) Support 16/8 bit bus interface.	Support mail function (256-byte data transmission) Support SPI interface.	No CPU is required 32 DIN/DOUT switchable in 4 bits	No CPU is required 32 DIN/DOUT switchable in 8 bits ST44SW: Required

Series name	IO mode IC (AD slave)	IO mode IC (AD slave)	IO mode IC (AD slave)	IO mode IC (DA slave)	IO mode IC (DA slave)
Type	MKY44-AD12A	MKY44-AD16A	MKY44-AD16B	MKY44-DA16A	MKY44-DA16B
Package
Function	12 bit AD 4ch 4 DIN/4 DOUT	16 bit AD 2ch 8 DIN/8 DOUT	16 bit AD 4ch	16 bit DA 2ch 8 DIN/8 DOUT	16 bit DA 4ch
Supply voltage	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V
Features	No CPU is required Built-in AD converter ST44SW: Unrequired	No CPU is required External AD converter (AD7682) ST44SW: Required	No CPU is required External AD converter (AD7682) ST44SW: Unequired	No CPU is required External DA converter (AD5752) ST44SW: Required	No CPU is required External DA converter (AD5754) ST44SW: Unequired

Series name	IO mode IC (positioning slave)	IO mode IC (positioning slave)	IO mode IC (slave)		Support IC
Type	MKY44-MC01A	MKY44-MC02A	MKY44-FS00A		ST44SW
Package
Function	24 kpps motor control 1 axis Rotary encorder input 1 ch general-purpose DI/O	12.5 kpps motor control 2 axis Rotary encoder input 2 ch general-purpose DIO	Acceleration of communication among I/O		SA, DOSA, BPS pin expansion for some MKY44 series chips
Supply voltage	3.3 V	3.3 V	3.3 V		3.3 V
Features	No CPU is required Trapezoidal velocity control (Acceleration and deceleration: linear or S-curve) No interpolation function ST44SW: Required	No CPU is required Trapezoidal velocity control (Acceleration and deceleration: linear or S-curve) No interpolation function ST44SW: Required	Supports communication among ICs in I/O mode		Switchable between binary and decimal modes

* The ST44SW is an IC for switch expansion for communication settings when using the MKY44.