TCA9534APWR
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Interface | I²C |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Output Type | Push-Pull |
| Supplier Device Package | 16-TSSOP |
| Number of I/O | 8 |
| Voltage - Supply | 1.65V ~ 5.5V |
| Clock Frequency | 400 kHz |
| Current - Output Source/Sink | - |
| Interrupt Output | Yes |
| Features | - |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | TCA9534 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
TCA9534APWR 8-Bit I2C I/O Expander 400 kHz 16-TSSOP
The TCA9534APWR is a low-voltage, low-power 8-bit I/O expander from TI, designed for the I2C and SMBus protocols. Housed in a 16-pin TSSOP (PW) surface-mount package, it operates over a wide supply range of 1.65V to 5.5V, supporting both 100kHz (standard-mode) and 400kHz (fast-mode) clock speeds. This device integrates configurable I/O ports, an active-low interrupt output (INT), and internal configuration, polarity, and input registers, enabling seamless GPIO expansion for microcontrollers. It features robust ESD protection (>2000V HBM), low standby current (<1µA), and high-current drive outputs for direct LED driving. With an operating temperature range of -40°C to +85°C, it ensures stable performance in industrial, consumer, and portable electronics, offering eight addressable devices via A0, A1, A2 pins.
TCA9534APWR Application Scenarios
● Industrial automation: PLC I/O expansion, sensor monitoring, relay control
● Consumer electronics: Smart home devices, keypad interfaces, LED controllers
● Portable/battery-powered devices: Low-power GPIO extension, wearable electronics
● Networking/servers: Status monitoring, control signal routing, LED indication
● Automotive infotainment: Button/switch interfaces, dashboard lighting control
● Test & measurement: Data acquisition systems, multi-channel signal control
● IoT edge devices: Sensor hub expansion, low-power I/O management
Alternative I/O expander Models
1. TI PCA9534APWR: 8-bit I2C expander, 16-pin TSSOP, 2.3V–5.5V, pin-compatible, lower-voltage predecessor with identical function.
2. Microchip MCP23008-E/P: 8-bit I2C GPIO expander, DIP/SOIC, 1.8V–5.5V, industrial temp (-40°C to +125°C), cost-effective through-hole option.
3. NXP PCF8574ADB: 8-bit I2C expander, 16-pin SOIC, 2.5V–6V, simple interface, widely used legacy alternative for basic GPIO expansion.
4. TI PCA9557RGYR: 8-bit I2C expander, 16-pin VQFN, 2.3V–5.5V, compact package, push-pull/open-drain outputs for space-constrained designs.
5. onsemi CAT9554YI-T: 8-bit I2C/SMBus expander, 16-pin TSSOP, 1.8V–5.5V, interrupt output, direct drop-in replacement for TCA9534APWR.
