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TCA9535 Low-Power I/O Expander

Texas Instruments TCA9535 Low-Power I/O Expander is a 24-pin device that provides 16 bits of general-purpose parallel input and output (I/O) expansion for the two-line bidirectional I²C bus or SMBus protocol. The device can operate with a power supply voltage ranging from 1.65V to 5.5V. The Texas Instruments TCA9535 consists of two 8-bit configurations (input or output selection), input port, output port, and polarity inversion (active-high or active-low operation) registers. When the power is turned on, the I/Os are configured as inputs. The system master can enable the I/Os as inputs or outputs by writing to the I/O configuration bits.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CAD) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	ECAD Model	Series	Mounting Style	Package / Case	Interface Type	Number of I/Os	Interrupt Output	Supply Voltage - Min	Supply Voltage - Max	Maximum Clock Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Packaging	ESD Protection
	Interface - I/O Expanders Remote 16bit I2C LP I/O Expander A 595-T A 595-TCA9535DBT TCA9535DBR Texas Instruments 1: $2.94 2,006In Stock	Mfr. Part # TCA9535DBR Mouser Part # 595-TCA9535DBR	Texas Instruments	Interface - I/O Expanders Remote 16bit I2C LP I/O Expander A 595-T A 595-TCA9535DBT Learn More about Texas Instruments ti tca9535 expander	Datasheet	2,006In Stock	Cut Tape $2.94 $2.17 $1.99 $1.77 Reel $1.50 View $1.67 $1.61 $1.57 $1.44 MouseReel Available	Min.: 1 Mult.: 1 : 2,000			TCA9535	SMD/SMT	SSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	5.5 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 16-bit 1.65- to 5.5- V I2C/SMBus I/O exp A 595-TCA9535DBR TCA9535DBT Texas Instruments 1: $3.77 429In Stock	Mfr. Part # TCA9535DBT Mouser Part # 595-TCA9535DBT	Texas Instruments	Interface - I/O Expanders 16-bit 1.65- to 5.5- V I2C/SMBus I/O exp A 595-TCA9535DBR Learn More about Texas Instruments ti tca9535 expander	Datasheet	429In Stock	Cut Tape $3.77 $2.81 $2.56 $2.30 Reel $2.16 View $2.04 $1.96 $1.93 $1.90 MouseReel Available	Min.: 1 Mult.: 1 : 250			TCA9535	SMD/SMT	SSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders Remt 16Bit I2C SMBus Lo-Pwr I/O Expndr TCA9535PWR Texas Instruments 1: $2.81 151In Stock 32,000On Order	Mfr. Part # TCA9535PWR Mouser Part # 595-TCA9535PWR	Texas Instruments	Interface - I/O Expanders Remt 16Bit I2C SMBus Lo-Pwr I/O Expndr Learn More about Texas Instruments ti tca9535 expander	Datasheet	151In Stock 32,000On Order On Order Ship Dates Mfr. #: TCA9535PWR Stock: 151 Can Ship Immediately On Order: 6,000 Expected 2026-11-13 12,000 Expected 2026-11-19 14,000 Expected 2027-01-28 Factory Lead-Time: 20 Weeks	Cut Tape $2.81 $2.06 $1.87 $1.67 Reel $1.41 View $1.57 $1.51 $1.38 MouseReel Available	Min.: 1 Mult.: 1 : 2,000			TCA9535	SMD/SMT	TSSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders Remote 16bit I2C and SMBux TCA9535RGER Texas Instruments 1: $2.85 56,080On Order	Mfr. Part # TCA9535RGER Mouser Part # 595-TCA9535RGER	Texas Instruments	Interface - I/O Expanders Remote 16bit I2C and SMBux Learn More about Texas Instruments ti tca9535 expander	Datasheet	56,080On Order On Order Ship Dates Mfr. #: TCA9535RGER Stock: 0 On Order: 26,080 Expected 2026-12-24 3,000 Expected 2026-12-31 27,000 Expected 2027-01-07 Factory Lead-Time: 20 Weeks	Cut Tape $2.85 $2.10 $1.92 $1.71 Reel $1.39 View $1.58 $1.53 $1.37 MouseReel Available	Min.: 1 Mult.: 1 : 3,000			TCA9535	SMD/SMT	VQFN-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders Rem 16B I2C & SMBus Low-Pwr I/O Expander TCA9535RTWR Texas Instruments 1: $2.46 74,539On Order	Mfr. Part # TCA9535RTWR Mouser Part # 595-TCA9535RTWR	Texas Instruments	Interface - I/O Expanders Rem 16B I2C & SMBus Low-Pwr I/O Expander Learn More about Texas Instruments ti tca9535 expander	Datasheet	74,539On Order On Order Ship Dates Mfr. #: TCA9535RTWR Stock: 0 On Order: 29,539 Expected 2026-12-17 45,000 Expected 2027-10-14 Factory Lead-Time: 20 Weeks	Cut Tape $2.46 $1.80 $1.64 $1.45 Reel $1.20 View $1.34 $1.29 $1.28 $1.19 MouseReel Available	Min.: 1 Mult.: 1 : 3,000			TCA9535	SMD/SMT	WQFN-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 16-bit 1.65- to 5.5- V I2C/SMBus I/O exp TCA9535MRGER Texas Instruments 1: $2.94 5,990Expected 2026-11-19	Mfr. Part # TCA9535MRGER Mouser Part # 595-TCA9535MRGER	Texas Instruments	Interface - I/O Expanders 16-bit 1.65- to 5.5- V I2C/SMBus I/O exp Learn More about Texas Instruments ti tca9535 expander	Datasheet	5,990Expected 2026-11-19	Cut Tape $2.94 $2.17 $1.99 $1.77 Reel $1.47 View $1.67 $1.61 $1.57 $1.44 MouseReel Available	Min.: 1 Mult.: 1 : 3,000			TCA9535	SMD/SMT	VQFN-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV