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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 (GBP) 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: £1.53 2,006In Stock	Mfr. Part No. TCA9535DBR Mouser Part No 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 £1.53 £1.13 £1.04 £0.925 Reel £0.78 View £0.871 £0.841 £0.818 £0.751 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: £1.96 429In Stock	Mfr. Part No. TCA9535DBT Mouser Part No 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 £1.96 £1.47 £1.34 £1.20 Reel £1.13 View £1.07 £1.02 £1.00 £0.995 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: £1.47 151In Stock 32,000On Order	Mfr. Part No. TCA9535PWR Mouser Part No 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. No: TCA9535PWR Stock: 151 Can Dispatch Immediately On Order: 6,000 Expected 13/11/2026 12,000 Expected 19/11/2026 14,000 Expected 28/01/2027 Factory Lead Time: 20 Weeks	Cut Tape £1.47 £1.07 £0.978 £0.871 Reel £0.738 View £0.818 £0.788 £0.721 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: £1.48 56,080On Order	Mfr. Part No. TCA9535RGER Mouser Part No 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. No: TCA9535RGER Stock: 0 On Order: 26,080 Expected 24/12/2026 3,000 Expected 31/12/2026 27,000 Expected 07/01/2027 Factory Lead Time: 20 Weeks	Cut Tape £1.48 £1.10 £0.995 £0.89 Reel £0.726 View £0.826 £0.796 £0.712 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: £1.28 74,539On Order	Mfr. Part No. TCA9535RTWR Mouser Part No 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. No: TCA9535RTWR Stock: 0 On Order: 29,539 Expected 17/12/2026 45,000 Expected 14/10/2027 Factory Lead Time: 20 Weeks	Cut Tape £1.28 £0.943 £0.856 £0.759 Reel £0.624 View £0.698 £0.671 £0.667 £0.622 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: £1.53 5,990Expected 19/11/2026	Mfr. Part No. TCA9535MRGER Mouser Part No 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 19/11/2026	Cut Tape £1.53 £1.13 £1.04 £0.925 Reel £0.766 View £0.871 £0.841 £0.818 £0.748 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