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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
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.
| 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 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”