TCA9536DGKR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The TCA9536DGKR is a 4-bit I2C-bus I/O expander providing 4 general-purpose I/O lines at up to 1 MHz clock frequency in a tiny 8-pin SOIC package. It extends microcontroller GPIO over a 2-wire I2C interface, reducing pin count on host MCUs in space-constrained designs. Available from global distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- TCA9536DGKR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7852(MOQ 250)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TCA9536DGKR?
- 4-bit I2C general-purpose I/O expander operating at up to 1 MHz I2C clock, adding 4 configurable I/O lines to any microcontroller with only 2 wire connections
- 8-pin SOIC (S-PDSO-G8) RoHS-compliant (Pb-free, JESD-609 e4) package occupying minimal PCB area for GPIO expansion in ultra-compact embedded designs
- 4 independent I/O ports with individual direction control enabling mixed input/output configurations without external logic gates or shift registers
What is TCA9536DGKR used for?
TCA9536DGKR is used in IoT nodes, wearable devices, and compact industrial sensor boards where a host microcontroller lacks sufficient GPIO pins and only 2 I2C bus wires are available for peripheral expansion. Its 4 configurable I/O lines allow engineers to control status LEDs, read button states, or drive low-current actuators over the I2C bus at clock rates up to 1 MHz without adding a larger expander IC. The 8-pin SOIC footprint is also suitable for retrofitting onto existing PCBs with tight component spacing.
What are the specifications of TCA9536DGKR?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Address Bus Width | 4 |
| Clock Frequency-Max | 1MHz |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Bits | 4 |
| Number of I/O Lines | 4 |
| Number of Ports | 4 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.2 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.65V |
| Supply Voltage-Nom | 2.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the TCA9536DGKR datasheet?
TCA9536DGKR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TCA9536DGKR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many I/O lines does TCA9536DGKR provide, and at what maximum I2C clock speed does it operate?
TCA9536DGKR offers 4 general-purpose I/O lines organized as 4 independent ports, and it supports I2C clock frequencies up to 1 MHz (Fast-mode Plus). Each I/O line is individually direction-configurable, allowing simultaneous input and output use on the same device, which is useful for reading button presses while driving indicator LEDs over a 2-wire bus.
For a compact IoT sensor node, how does TCA9536DGKR reduce MCU pin count while fitting a minimal PCB footprint?
TCA9536DGKR adds 4 GPIO lines using only the 2-wire I2C interface (SDA and SCL), so the host MCU gives up just 2 pins to gain 4 additional controllable lines. The 8-pin SOIC-8 package measures approximately 5 mm x 4 mm, fitting in dense IoT node layouts where larger 16-pin or 24-pin expanders would not comply with board area constraints of under 10 cm².
What is a practical alternative to TCA9536DGKR when 8 or more I/O lines are needed on the same I2C bus?
When a design requires 8 I/O lines instead of 4, the TCA9538 or PCA9538 are pin-compatible I2C expanders in similar SOIC packages that provide 8-bit I/O at the same 1 MHz I2C clock rate. Migrating from TCA9536DGKR to an 8-bit expander requires only a firmware register map change and a larger package footprint, making the upgrade path straightforward for designs that outgrow the 4-bit capacity.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 250+ | $0.9900 | $247.50 |
| 500+ | $0.9300 | $465.00 |
| 1000+ | $0.8500 | $850.00 |
| 2500+ | $0.8090 | $2022.50 |
| 5000+ | $0.7910 | $3955.00 |
| 7500+ | $0.7852 | $5889.07 |
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