Specifications
| Type | Description |
|---|---|
| Part Number | TCA9534 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package Case | 16-pin TSSOP (PW), 5.00 mm x 4.40 mm; 16-pin SOIC (DW), 10.30 mm x 7.50 mm |
| Supply Voltage Operating Range | 1.65-5.5 V |
| I2C Bus Speed | 100 kHz and 400 kHz |
| I/O Port Count | 8 bits |
| I/O Port Tolerance | 5 V tolerant |
| Maximum Devices Per Bus | 8 devices |
| Power-Up I/O State | All channels configured as inputs |
| Interrupt Output Type | Open-drain active-low |
| Absolute Maximum Supply Voltage | -0.5 to 6 V |
| Absolute Maximum Input Voltage | -0.5 to 6 V |
| Absolute Maximum Output Voltage | -0.5 to 6 V |
| Input Clamp Current | -20 mA |
| Output Clamp Current | -20 mA |
| Input-Output Clamp Current | ±20 mA |
| Absolute Maximum Continuous Output Low Current Per P-Port | 50 mA |
| Absolute Maximum Continuous Output High Current Per P-Port | -50 mA |
| Absolute Maximum Continuous Current Through GND | 250 mA |
| Absolute Maximum Continuous Current Through VCC | -160 mA |
| Maximum Junction Temperature | 100 °C |
| Storage Temperature | -65 to 150 °C |
| ESD Rating HBM | ±2000 V |
| ESD Rating CDM | ±1000 V |
| High-Level Input Voltage SCL/SDA | 0.7 x VCC to VCC |
| High-Level Input Voltage A0/A1/A2/P7-P0 | 0.7 x VCC to 5.5 V |
| Low-Level Input Voltage SCL/SDA | -0.5 to 0.3 x VCC |
| Low-Level Input Voltage A0/A1/A2/P7-P0 | -0.5 to 0.3 x VCC |
| Low-Level Input Voltage A0/A1/A2/P7-P0 | -0.5 to 0.2 x VCC |
| High-Level Output Current | -10 mA |
| Low-Level Output Current P-Ports | 25 mA |
| Low-Level Output Current P-Ports | 18 mA |
| Low-Level Output Current P-Ports | 9 mA |
| Low-Level Output Current INT/SDA | 6 mA |
| Low-Level Output Current INT/SDA | 3 mA |
| Recommended Continuous Current Through GND | 200 mA |
| Recommended Continuous Current Through VCC | -80 mA |
| Operating Free-Air Temperature | -40 to 85 °C |
| Junction-to-Ambient Thermal Resistance | 122 °C/W |
| Junction-to-Ambient Thermal Resistance | 92.2 °C/W |
| Junction-to-Case Top Thermal Resistance | 56.4 °C/W |
| Junction-to-Case Top Thermal Resistance | 53.8 °C/W |
| Junction-to-Board Thermal Resistance | 67.1 °C/W |
| Junction-to-Board Thermal Resistance | 56.9 °C/W |
| Junction-to-Top Characterization Parameter | 10.8 °C/W |
| Junction-to-Top Characterization Parameter | 26.4 °C/W |
| Junction-to-Board Characterization Parameter | 66.5 °C/W |
| Junction-to-Board Characterization Parameter | 56.4 °C/W |
| Input Diode Clamp Voltage | max -1.2 V |
| Power-On Reset Voltage Rising | typ 1.2 V, max 1.5 V |
| Power-On Reset Voltage Falling | min 0.75 V, typ 1 V |
| P-Port High-Level Output Voltage | min 1.2 V |
| P-Port High-Level Output Voltage | min 1.8 V |
| P-Port High-Level Output Voltage | min 2.6 V |
| P-Port High-Level Output Voltage | min 4.1 V |
| P-Port High-Level Output Voltage | min 1 V |
| P-Port High-Level Output Voltage | min 1.7 V |
| P-Port High-Level Output Voltage | min 2.5 V |
| P-Port High-Level Output Voltage | min 4 V |
| SDA Low-Level Output Current | 3 mA |
| P-Port Low-Level Output Current | 8 mA |
| P-Port Low-Level Output Current | 10 mA |
| INT Low-Level Output Current | 3 mA |
| SCL/SDA Input Current | ±1 µA |
| A0/A1/A2 Input Current | ±1 µA |
| P-Port High-Level Input Current | 1 µA |
| P-Port Low-Level Input Current | -1 µA |
| Datasheet Status | request_only |
Product Overview
The device operates from a recommended 1.65-5.5 V supply. P-port I/O pins are 5 V tolerant, while SCL/SDA high-level input voltage is specified from 0.7 x VCC to VCC and A0/A1/A2/P7-P0 high-level input voltage is specified from 0.7 x VCC to 5.5 V. After power-on reset, all channels are configured as inputs, and the INT pin is an open-drain active-low output.
Package options are 16-pin TSSOP (PW), 5.00 mm x 4.40 mm, and 16-pin SOIC (DW), 10.30 mm x 7.50 mm. Thermal data includes junction-to-ambient resistance of 122 °C/W for PW TSSOP and 92.2 °C/W for DW SOIC. Operating free-air temperature is -40 to 85 °C, with storage temperature rated from -65 to 150 °C.
Key Features
- 8-bit general-purpose parallel I/O expansion
- I2C and SMBus interface support
- 100 kHz and 400 kHz bus operation
- 1.65-5.5 V recommended supply range
- 5 V tolerant P-port I/O pins
- Up to 8 devices per bus
- All channels power up as inputs
- Open-drain active-low INT output
- -40 to 85 °C operating free-air range
- 16-pin TSSOP and SOIC package options
Typical Applications
- I2C GPIO expansion
- SMBus I/O expansion
- Interrupt-driven input monitoring
- Multi-device I/O buses
- 5 V tolerant port interfacing
- Parallel control from serial bus
Procurement Notes
When requesting a quote for TCA9534, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What supply range does the TCA9534 support?
The TCA9534 has a recommended operating supply voltage range of 1.65-5.5 V. Absolute maximum supply voltage is specified from -0.5 to 6 V over the operating free-air temperature range.
How many I/O ports does the TCA9534 provide?
The device provides 8 bits of general-purpose parallel input/output expansion. After power-on reset, all channels are configured as inputs.
What I2C bus speeds are supported by TCA9534?
The TCA9534 supports Standard-mode and Fast-mode I2C operation, with specified bus speeds of 100 kHz and 400 kHz.
How many TCA9534 devices can share one bus?
Up to 8 devices can be placed on the same bus using the A0, A1, and A2 hardware address pins.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.