Specifications
| Type | Description |
|---|---|
| Part Number | TCA9535 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | TSSOP-24 7.80 mm x 4.40 mm; SSOP-24 6.20 mm x 5.30 mm; WQFN-24 4.00 mm x 4.00 mm; VQFN-24 4.00 mm x 4.00 mm |
| Interface | I2C or SMBus to 16-bit parallel I/O |
| Number of GPIO Ports | 16 bits; P00-P07 and P10-P17 |
| Operating Supply Voltage | 1.65-5.5 V |
| Feature Supply Voltage Range | 1.65-5 V |
| I2C Bus Speed | 400 kHz |
| I/O Voltage Tolerance | 5 V tolerant |
| Interrupt Output Type | Open-drain active-low |
| Address Pins | 3 hardware address pins; A0, A1, A2 |
| Maximum Devices on Bus | Up to 8 devices |
| Power-On I/O State | Configured as inputs |
| Internal I/O Pull-Up Resistors | Not included |
| Unused I/O Pin Requirement | Tie to VCC or GND through about 10 kΩ resistor |
| 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; VI < 0 |
| Output Clamp Current | -20 mA; VO < 0 |
| Input-Output Clamp Current | ±20 mA; VO < 0 or VO > VCC |
| Absolute Maximum Continuous Output Low Current | 50 mA; VO = 0 to VCC |
| Absolute Maximum Continuous Output High Current | -50 mA; VO = 0 to VCC |
| Continuous Current Through GND | -250 mA |
| Continuous Current Through VCC | 160 mA |
| Maximum Junction Temperature | 100 °C |
| Storage Temperature | -65 to 150 °C |
| ESD Rating HBM | ±2000 V; ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±1000 V; JEDEC JESD22-C101 |
| High-Level Input Voltage for SCL/SDA | 0.7 × VCC to VCC |
| High-Level Input Voltage for Address and P Ports | 0.7 × VCC to 5.5 V; A2-A0, P07-P00, P17-P10 |
| Low-Level Input Voltage | -0.5 to 0.3 × VCC V; SCL, SDA, A2-A0, P07-P00, P17-P10 |
| High-Level Output Current | -10 mA; P07-P00, P17-P10 |
| Low-Level Output Current at Tj ≤ 65°C | 25 mA; P07-P00, P17-P10 |
| Low-Level Output Current at Tj ≤ 85°C | 18 mA; P07-P00, P17-P10 |
| Low-Level Output Current at Tj ≤ 100°C | 11 mA; P07-P00, P17-P10 |
| INT/SDA Low-Level Output Current at Tj ≤ 85°C | 6 mA |
| INT/SDA Low-Level Output Current at Tj ≤ 100°C | 3.5 mA |
| Operating Free-Air Temperature | -40 to 85 °C |
| Power-On Reset Voltage Rising | 1.2 V typ, 1.5 V max; VCC rising, VI = VCC or GND, IO = 0 |
| Power-On Reset Voltage Falling | 0.75 V typ, 1 V max; VCC falling, VI = VCC or GND, IO = 0 |
| Input Diode Clamp Voltage | -1.2 V max; II = -18 mA, VCC = 1.65 V to 5.5 V |
| P-Port High-Level Output Voltage at 1.65 V and -8 mA | 1.2 V min |
| P-Port High-Level Output Voltage at 2.3 V and -8 mA | 1.8 V min |
| P-Port High-Level Output Voltage at 3 V and -8 mA | 2.6 V min |
| P-Port High-Level Output Voltage at 4.75 V and -8 mA | 4.1 V min |
| P-Port High-Level Output Voltage at 1.65 V and -10 mA | 1.0 V min |
| P-Port High-Level Output Voltage at 2.3 V and -10 mA | 1.7 V min |
| P-Port High-Level Output Voltage at 3 V and -10 mA | 2.5 V min |
| P-Port High-Level Output Voltage at 4.75 V and -10 mA | 4.0 V min |
| SDA Low-Level Output Current | 3 mA; VOL = 0.4 V, VCC = 1.65 V to 5.5 V |
| P-Port Low-Level Output Current at VOL 0.5 V | 8 mA; VCC = 1.65 V to 5.5 V |
| P-Port Low-Level Output Current at VOL 0.7 V | 10 mA; VCC = 1.65 V to 5.5 V |
| INT Low-Level Output Current | 3 mA; VOL = 0.4 V, VCC = 1.65 V to 5.5 V |
| SCL/SDA Input Leakage Current | ±1 µA; VI = VCC or GND, VCC = 1.65 V to 5.5 V |
| A2-A0 Input Leakage Current | ±1 µA; VI = VCC or GND, VCC = 1.65 V to 5.5 V |
| Datasheet Status | request_only |
Product Overview
The TCA9535 is a Texas Instruments 16-bit I2C I/O expander in the Signal_Chain category. It provides an I2C or SMBus interface to 16-bit parallel I/O using P00-P07 and P10-P17. The device supports a 400 kHz fast I2C bus and has three hardware address pins, A0, A1, and A2, allowing up to 8 devices on the same bus.
Recommended operation spans a 1.65 V to 5.5 V supply and -40°C to 85°C free-air temperature. The I/O ports are 5 V tolerant, power on configured as inputs, and do not include internal I/O pull-up resistors. Unused port pins should be tied to VCC or GND through about a 10 kΩ resistor.
Package choices include TSSOP-24 7.80 mm x 4.40 mm, SSOP-24 6.20 mm x 5.30 mm, WQFN-24 4.00 mm x 4.00 mm, and VQFN-24 4.00 mm x 4.00 mm. The open-drain active-low INT output supports interrupt-based monitoring for input changes in I2C/SMBus-controlled parallel I/O designs.
Key Features
- I2C or SMBus interface to 16-bit parallel I/O
- 16 GPIO bits on P00-P07 and P10-P17
- Recommended supply range from 1.65 V to 5.5 V
- 400 kHz fast I2C bus operation
- 5 V tolerant I/O port pins
- Open-drain active-low INT output
- Three hardware address pins support up to 8 devices
- I/O pins power on configured as inputs
- Internal I/O pull-up resistors are not included
- Unused I/O pins require about 10 kΩ termination
Typical Applications
- I2C to parallel I/O expansion
- SMBus controlled GPIO expansion
- 16-bit port control
- Interrupt-based input monitoring
- Multi-device addressed I/O buses
- 5 V tolerant port interfacing
- Input-default power-on configurations
Procurement Notes
When requesting a quote for TCA9535, 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 interface does the TCA9535 provide?
The TCA9535 provides an I2C or SMBus interface to 16-bit parallel I/O. The GPIO bits are organized on P00-P07 and P10-P17, and the device supports 400 kHz fast I2C bus operation.
What supply voltage range is recommended for TCA9535 operation?
The recommended operating supply voltage is 1.65 V to 5.5 V. The extracted feature list also states a 1.65 V to 5 V supply voltage range, while the absolute maximum supply rating is -0.5 V to 6 V.
How many TCA9535 devices can share one bus?
The TCA9535 has three hardware address pins, A0, A1, and A2. These pins allow up to 8 devices to be addressed on the bus when the address pins are configured appropriately.
What is the TCA9535 I/O state at power on?
At power on, the TCA9535 I/O ports are configured as inputs. The device does not include internal I/O pull-up resistors, and unused I/O pins should be tied to VCC or GND through about a 10 kΩ resistor.
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.