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400 kHz Interface ICs

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Maximum Clock Frequency = 400 kHz

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Product Type	Product	Type	Interface Type	Mounting Style	Package/Case
Interface - I/O Expanders 8-bit 1.65- to 5.5-V I2C/SMBus I/O expan TCA9538DBR Texas Instruments 1: £1.56 336In Stock 4,000Expected 21/12/2026	Mfr. Part No. TCA9538DBR Mouser Part No 595-TCA9538DBR	Texas Instruments	Interface - I/O Expanders 8-bit 1.65- to 5.5-V I2C/SMBus I/O expan	Datasheet	336In Stock 4,000Expected 21/12/2026	Cut Tape £1.56 £1.18 £1.08 £0.978 Reel £0.871 View £0.925 £0.917 £0.849 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial	SMD/SMT	SSOP-16
Interface - I/O Expanders 8-bit 1.65- to 5.5-V I2C/SMBus I/O expan TCA9554ADBR Texas Instruments 1: £1.13 1,067In Stock 2,000Expected 21/12/2026	Mfr. Part No. TCA9554ADBR Mouser Part No 595-TCA9554ADBR	Texas Instruments	Interface - I/O Expanders 8-bit 1.65- to 5.5-V I2C/SMBus I/O expan Learn More about Texas Instruments ti tca9554 tca9554a expander	Datasheet	1,067In Stock 2,000Expected 21/12/2026	Cut Tape £1.13 £0.826 £0.748 £0.663 Reel £0.555 View £0.624 £0.60 £0.58 £0.543 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	I/O Expanders	I/O Expanders	I/O Expander	I2C, Serial, SMBus	SMD/SMT	SSOP-16
Interface - I/O Expanders Remote 8B I2C & SMBu s I/O Expander TCA9554APWR Texas Instruments 1: £0.986 197In Stock 10,000Expected 21/12/2026	Mfr. Part No. TCA9554APWR Mouser Part No 595-TCA9554APWR	Texas Instruments	Interface - I/O Expanders Remote 8B I2C & SMBu s I/O Expander Learn More about Texas Instruments ti tca9554 tca9554a expander	Datasheet	197In Stock 10,000Expected 21/12/2026	Cut Tape £0.986 £0.826 £0.748 £0.663 Reel £0.555 View £0.624 £0.60 £0.593 £0.543 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	I/O Expanders	I/O Expanders	I/O Expander	I2C, Serial, SMBus	SMD/SMT	TSSOP-16
Interface - I/O Expanders Remote 8-bit I2C SMB us I/O Expander TCA9554DBQR Texas Instruments 1: £1.48 1,185In Stock 2,500Expected 21/12/2026	Mfr. Part No. TCA9554DBQR Mouser Part No 595-TCA9554DBQR	Texas Instruments	Interface - I/O Expanders Remote 8-bit I2C SMB us I/O Expander Learn More about Texas Instruments ti tca9554 tca9554a expander	Datasheet	1,185In Stock 2,500Expected 21/12/2026	Cut Tape £1.48 £1.09 £0.995 £0.882 Reel £0.747 View £0.834 £0.803 £0.732 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I/O Expanders	I/O Expanders	I/O Expander	I2C, Serial, SMBus	SMD/SMT	SSOP-16
Interface - I/O Expanders 8-bit 1.65- to 5.5-V I2C/SMBus I/O expan A 595-TCA9554DWR TCA9554DWT Texas Instruments 1: £1.89 18In Stock 500Expected 21/12/2026	Mfr. Part No. TCA9554DWT Mouser Part No 595-TCA9554DWT	Texas Instruments	Interface - I/O Expanders 8-bit 1.65- to 5.5-V I2C/SMBus I/O expan A 595-TCA9554DWR Learn More about Texas Instruments ti tca9554 tca9554a expander	Datasheet	18In Stock 500Expected 21/12/2026	Cut Tape £1.89 £1.41 £1.28 £1.15 Reel £1.09 MouseReel Available	Min.: 1 Mult.: 1 : 250	I/O Expanders	I/O Expanders	I/O Expander	I2C, Serial, SMBus	SMD/SMT	SOIC-16
Interface - Signal Buffers, Repeaters 2-bit level-translat ing 400-kHz I2C/SMB A 595-TCA9800DGKR TCA9800DGKT Texas Instruments 1: £1.05 228In Stock 750Expected 21/12/2026	Mfr. Part No. TCA9800DGKT Mouser Part No 595-TCA9800DGKT	Texas Instruments	Interface - Signal Buffers, Repeaters 2-bit level-translat ing 400-kHz I2C/SMB A 595-TCA9800DGKR	Datasheet	228In Stock 750Expected 21/12/2026	Cut Tape £1.05 £0.766 £0.689 £0.612 Reel £0.548 MouseReel Available	Min.: 1 Mult.: 1 : 250	Signal Buffers, Repeaters	Repeaters	I2C Bus	I2C, SMBus	SMD/SMT	VSSOP-8
Interface - Signal Buffers, Repeaters 2-bit level-translat ing 400-kHz I2C/SMB A 595-TCA9801DGKT TCA9801DGKR Texas Instruments 1: £0.943 33In Stock 5,000Expected 24/12/2026	Mfr. Part No. TCA9801DGKR Mouser Part No 595-TCA9801DGKR	Texas Instruments	Interface - Signal Buffers, Repeaters 2-bit level-translat ing 400-kHz I2C/SMB A 595-TCA9801DGKT Learn More about Texas Instruments ti tca9801 buffer repeater	Datasheet	33In Stock 5,000Expected 24/12/2026	Cut Tape £0.943 £0.683 £0.618 £0.538 View Reel £0.457 £0.504 £0.485 £0.484 £0.457 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Signal Buffers, Repeaters	Buffers	I2C Bus	I2C, SMBus	SMD/SMT	VSSOP-8
Interface - Signal Buffers, Repeaters LevelTranslating I2C Bus Buffer/Repeater A 595-TCA9801DGKR TCA9801DGKT Texas Instruments 1: £1.05 116In Stock 2,250Expected 21/12/2026	Mfr. Part No. TCA9801DGKT Mouser Part No 595-TCA9801DGKT	Texas Instruments	Interface - Signal Buffers, Repeaters LevelTranslating I2C Bus Buffer/Repeater A 595-TCA9801DGKR Learn More about Texas Instruments ti tca9801 buffer repeater	Datasheet	116In Stock 2,250Expected 21/12/2026	Cut Tape £1.05 £0.766 £0.689 £0.612 Reel £0.548 MouseReel Available	Min.: 1 Mult.: 1 : 250	Signal Buffers, Repeaters	Buffers	I2C Bus	I2C, SMBus	SMD/SMT	VSSOP-8
Interface - Signal Buffers, Repeaters LevelTranslating I2C Bus Buffer/Repeater A 595-TCA9803DGKR TCA9803DGKT Texas Instruments 1: £1.10 7In Stock	Mfr. Part No. TCA9803DGKT Mouser Part No 595-TCA9803DGKT	Texas Instruments	Interface - Signal Buffers, Repeaters LevelTranslating I2C Bus Buffer/Repeater A 595-TCA9803DGKR Learn More about Texas Instruments ti tca9803 buffer repeater	Datasheet	7In Stock	Cut Tape £1.10 £0.803 £0.732 £0.65 Reel £0.61 MouseReel Available	Min.: 1 Mult.: 1 : 250	Signal Buffers, Repeaters	Buffers	I2C Bus	I2C, SMBus	SMD/SMT	VSSOP-8
Interface - I/O Expanders Interface IO Expander PI4IOE5V6416ZDEX Diodes Incorporated 1: £1.20 223In Stock 84,000On Order	Mfr. Part No. PI4IOE5V6416ZDEX Mouser Part No 729-PI4IOE5V6416ZDEX	Diodes Incorporated	Interface - I/O Expanders Interface IO Expander Learn More about Diodes Incorporated diodes pi4ioe5v6416 io expander	Datasheet	223In Stock 84,000On Order On Order Ship Dates Mfr. No: PI4IOE5V6416ZDEX Stock: 223 Can Dispatch Immediately On Order: 21,000 Expected 26/05/2027 28,000 Expected 06/03/2028 35,000 Expected 31/03/2028 Factory Lead Time: 48 Weeks	Cut Tape £1.20 £0.882 £0.746 £0.705 Reel £0.523 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3,500 : 3,500	I/O Expanders			I2C, Serial	SMD/SMT	TQFN-24
Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port PI4IOE5V9539LE Diodes Incorporated 1: £1.09 41In Stock	Mfr. Part No. PI4IOE5V9539LE Mouser Part No 729-PI4IOE5V9539LE	Diodes Incorporated	Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port Learn More about Diodes Incorporated pericom io expanders	Datasheet	41In Stock	£1.09 £0.788 £0.679 £0.591 View £0.574 £0.562 £0.551 £0.545 £0.539	Min.: 1 Mult.: 1	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial, SMBus	SMD/SMT	TSSOP-24
Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port PI4IOE5V9539LEX Diodes Incorporated 1: £1.09 237In Stock 3,000Expected 08/12/2027	Mfr. Part No. PI4IOE5V9539LEX Mouser Part No 729-PI4IOE5V9539LEX	Diodes Incorporated	Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port Learn More about Diodes Incorporated pericom io expanders	Datasheet	237In Stock 3,000Expected 08/12/2027	Cut Tape £1.09 £0.788 £0.69 £0.629 View Reel £0.501 £0.608 £0.595 £0.582 £0.501	Min.: 1 Mult.: 1 : 3,000	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial, SMBus	SMD/SMT	TSSOP-24
Interface - I/O Expanders 8-bit I2C and SMBus IO Port PI4IOE5V9554ALEX Diodes Incorporated 1: £0.943 1,646In Stock 2,500Expected 20/10/2027	Mfr. Part No. PI4IOE5V9554ALEX Mouser Part No 729-PI4IOE5V9554ALEX	Diodes Incorporated	Interface - I/O Expanders 8-bit I2C and SMBus IO Port Learn More about Diodes Incorporated pericom io expanders	Datasheet	1,646In Stock 2,500Expected 20/10/2027	Cut Tape £0.943 £0.679 £0.595 £0.54 Reel £0.54 MouseReel Available	Min.: 1 Mult.: 1 Max.: 130 : 2,500	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial, SMBus	SMD/SMT	TSSOP-16
Interface - I/O Expanders 8-bit I2C and SMBus IO Port PI4IOE5V9554LE Diodes Incorporated 1: £1.01 138In Stock	Mfr. Part No. PI4IOE5V9554LE Mouser Part No 729-PI4IOE5V9554LE	Diodes Incorporated	Interface - I/O Expanders 8-bit I2C and SMBus IO Port Learn More about Diodes Incorporated pericom io expanders	Datasheet	138In Stock	£1.01 £0.732 £0.651 £0.632 View £0.548 £0.526 £0.502 £0.488 £0.477	Min.: 1 Mult.: 1	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial, SMBus	SMD/SMT	TSSOP-16
Interface - I/O Expanders 8-bit I2C and SMBus IO Port PI4IOE5V9554LEX Diodes Incorporated 1: £1.02 2,303In Stock 2,500Expected 16/04/2027	Mfr. Part No. PI4IOE5V9554LEX Mouser Part No 729-PI4IOE5V9554LEX	Diodes Incorporated	Interface - I/O Expanders 8-bit I2C and SMBus IO Port Learn More about Diodes Incorporated pericom io expanders	Datasheet	2,303In Stock 2,500Expected 16/04/2027	Cut Tape £1.02 £0.734 £0.645 £0.588 £0.568 Reel £0.568	Min.: 1 Mult.: 1 Max.: 460 : 2,500	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial, SMBus	SMD/SMT	TSSOP-16
Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port PI4IOE5V9555ZDEX Diodes Incorporated 1: £1.24 1,553In Stock 7,000Expected 18/01/2027	Mfr. Part No. PI4IOE5V9555ZDEX Mouser Part No 729-PI4IOE5V9555ZDEX	Diodes Incorporated	Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port Learn More about Diodes Incorporated pericom io expanders	Datasheet	1,553In Stock 7,000Expected 18/01/2027	Cut Tape £1.24 £0.908 £0.773 £0.726 Reel £0.726 MouseReel Available	Min.: 1 Mult.: 1 Max.: 620 : 3,500	I/O Expanders	I/O Expanders	I2C, SMBus	I2C, Serial, SMBus	SMD/SMT	TQFN-24
Interface - I/O Expanders NCA9539PW/SOT355/TSSOP24 NCA9539PWJ Nexperia 1: £1.09 97In Stock 2,500Expected 11/01/2027	Mfr. Part No. NCA9539PWJ Mouser Part No 771-NCA9539PWJ	Nexperia	Interface - I/O Expanders NCA9539PW/SOT355/TSSOP24 Learn More about Nexperia nca9535 nca9539 nca9555 gipo expanders	Datasheet	97In Stock 2,500Expected 11/01/2027	Cut Tape £1.09 £0.796 £0.717 £0.636 Reel £0.509 View £0.596 £0.572 £0.556 £0.486 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I/O Expanders	I/O Expanders	I2C and SMBus I/O Expander	I2C, Serial, SMBus	SMD/SMT	TSSOP-24
Interface - Signal Buffers, Repeaters Dual Supply Level translating I2C-bus/SMBus repeater PCA9509DP,118 NXP Semiconductors 1: £1.48 4,806Expected 09/11/2026	Mfr. Part No. PCA9509DP,118 Mouser Part No 771-PCA9509DP-T	NXP Semiconductors	Interface - Signal Buffers, Repeaters Dual Supply Level translating I2C-bus/SMBus repeater Learn More about NXP Semiconductors nxp pca9509 repeater	Datasheet	4,806Expected 09/11/2026	Cut Tape £1.48 £1.10 £0.995 £0.89 Reel £0.834 View £0.856 £0.841 £0.818 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Signal Buffers, Repeaters	Repeaters	I2C, SMBus	I2C, SMBus	SMD/SMT	TSSOP-8
Interface - Signal Buffers, Repeaters Dual Supply Low power level translating I2C-bus/SMBus repeater PCA9509PGM,125 NXP Semiconductors 1: £0.899 1,497In Stock 8,000Expected 14/01/2027	Mfr. Part No. PCA9509PGM,125 Mouser Part No 771-PCA9509PGM,125	NXP Semiconductors	Interface - Signal Buffers, Repeaters Dual Supply Low power level translating I2C-bus/SMBus repeater Learn More about NXP Semiconductors nxp pca9509 repeater	Datasheet	1,497In Stock 8,000Expected 14/01/2027	Cut Tape £0.899 £0.646 £0.582 £0.512 View Reel £0.413 £0.478 £0.458 £0.443 £0.424 £0.413 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Signal Buffers, Repeaters	Repeaters	I2C, SMBus	I2C, SMBus	SMD/SMT	XQFN-8
Interface - I/O Expanders 8-bit I2C-bus/SMBus I/O Expander with Interrupt and Reset in HVQFN16 package PCA9538BS,118 NXP Semiconductors 1: £2.00 103In Stock 24,000On Order	Mfr. Part No. PCA9538BS,118 Mouser Part No 771-PCA9538BS-T	NXP Semiconductors	Interface - I/O Expanders 8-bit I2C-bus/SMBus I/O Expander with Interrupt and Reset in HVQFN16 package	Datasheet	103In Stock 24,000On Order On Order Ship Dates Mfr. No: PCA9538BS,118 Stock: 103 Can Dispatch Immediately On Order: 12,000 Expected 02/11/2026 12,000 Expected 09/02/2027 Factory Lead Time: 30 Weeks	Cut Tape £2.00 £1.52 £1.31 £1.18 View Reel £0.995 £1.13 £1.09 £1.05 £1.04 £0.995 MouseReel Available	Min.: 1 Mult.: 1 : 6,000	I/O Expanders			I2C, Serial, SMBus	SMD/SMT	HVQFN-16
Interface - I/O Expanders 16-bit I2C-bus/SMBus I/O Expander with Interrupt and Reset in TSSOP24 package PCA9539PW,118 NXP Semiconductors 1: £2.02 108In Stock 17,500On Order	Mfr. Part No. PCA9539PW,118 Mouser Part No 771-PCA9539PW-T	NXP Semiconductors	Interface - I/O Expanders 16-bit I2C-bus/SMBus I/O Expander with Interrupt and Reset in TSSOP24 package	Datasheet	108In Stock 17,500On Order On Order Ship Dates Mfr. No: PCA9539PW,118 Stock: 108 Can Dispatch Immediately On Order: 7,500 Expected 07/06/2027 10,000 Expected 14/06/2027 Factory Lead Time: 30 Weeks	Cut Tape £2.02 £1.51 £1.37 £1.23 View Reel £0.995 £1.10 £1.07 £1.03 £0.995 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I/O Expanders	I/O Expanders	General Purpose	I2C, Serial, SMBus	SMD/SMT	TSSOP-24
Interface - I/O Expanders 8-bit I2C-bus/SMBus I/O Expander with Reset in TSSOP16 package PCA9557PW,118 NXP Semiconductors 1: £1.74 992In Stock 32,500Expected 21/12/2026	Mfr. Part No. PCA9557PW,118 Mouser Part No 771-PCA9557PW-T	NXP Semiconductors	Interface - I/O Expanders 8-bit I2C-bus/SMBus I/O Expander with Reset in TSSOP16 package	Datasheet	992In Stock 32,500Expected 21/12/2026	Cut Tape £1.74 £1.30 £1.17 £1.07 View Reel £0.908 £1.01 £0.986 £0.969 £0.908 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	I/O Expanders			I2C, Serial, SMBus	SMD/SMT	TSSOP-16
Interface - I/O Expanders Mobile I/O Companion Key-Scan LM8333FLQ8Y/NOPB Texas Instruments 1: £3.81 158In Stock	Mfr. Part No. LM8333FLQ8Y/NOPB Mouser Part No 926-LM8333FLQ8Y/NOPB	Texas Instruments	Interface - I/O Expanders Mobile I/O Companion Key-Scan	Datasheet	158In Stock	Cut Tape £3.81 £2.90 £2.77 £2.51 Reel £2.24 View £2.17 £2.13 £2.11 MouseReel Available	Min.: 1 Mult.: 1 : 250	I/O Expanders	I/O Expanders	I/O Expander	I2C, Serial	SMD/SMT	WQFN-32
Interface - Signal Buffers, Repeaters Dual Bidirct I2C Bus & SMBus Repeater A A 595-PCA9515BDGKR PCA9515ADGKR Texas Instruments 1: £2.96 595In Stock 2,500Expected 21/12/2026 NRND	Mfr. Part No. PCA9515ADGKR Mouser Part No 595-PCA9515ADGKR NRND	Texas Instruments	Interface - Signal Buffers, Repeaters Dual Bidirct I2C Bus & SMBus Repeater A A 595-PCA9515BDGKR Learn More about Texas Instruments ti pca95xx	Datasheet	595In Stock 2,500Expected 21/12/2026	Cut Tape £2.96 £2.23 £2.06 £1.85 £1.75 Reel £1.61 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Signal Buffers, Repeaters	Repeaters	I2C, SMBus	I2C, SMBus	SMD/SMT	VSSOP-8
Interface - I/O Expanders Remote 8B I2C & Lo- Pwr I/O Expander A 5 A 595-PCA9534ADB PCA9534ADBR Texas Instruments 1: £3.88 269In Stock End of Life	Mfr. Part No. PCA9534ADBR Mouser Part No 595-PCA9534ADBR End of Life	Texas Instruments	Interface - I/O Expanders Remote 8B I2C & Lo- Pwr I/O Expander A 5 A 595-PCA9534ADB	Datasheet	269In Stock	Cut Tape £3.88 £2.92 £2.69 £2.43 View Reel £2.10 £2.30 £2.28 £2.15 £2.10 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	I/O Expanders	I/O Expanders	I/O Expander	I2C, Serial, SMBus	SMD/SMT	SSOP-16