PCA9544APWR
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Interface | I²C, SMBus |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Applications | Translating Switch |
| Supplier Device Package | 20-TSSOP |
| Voltage - Supply | 2.3V ~ 5.5V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | PCA9544 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
PCA9544APWR 4-Channel I2C/SMBus Multiplexer
The PCA9544APWR is a high-reliability 4-channel bidirectional I2C/SMBus multiplexer from Texas Instruments (TI), designed to expand a single I2C master interface to four independent slave channels, resolving I2C slave address conflicts in embedded systems. It integrates voltage translation functionality, enabling communication between 1.8V, 2.5V, 3.3V and 5V devices, and features power-on reset (POR) that deselects all channels by default for system safety. Controlled via an 8-bit I2C control register, it supports standard-mode (100kHz) and fast-mode (400kHz) operation, with interrupt logic for each slave channel, packaged in a 20-TSSOP for compact, high-density PCB designs suitable for industrial and consumer applications.
Operating at a 2.3V to 5.5V supply voltage range, the PCA9544APWR consumes low standby current, with 5.5V-tolerant inputs for enhanced compatibility. It operates reliably across -40°C to 85°C industrial temperature range, boasting ESD protection up to 2000V (human body model) and latch-up performance exceeding 100mA.
Alternative Bus multiplexer Models
● TI TCA9544A: 1.65V-5.5V, 20-TSSOP, upgraded POR and lower voltage support, direct drop-in replacement.
● NXP PCA9544ABS: 4-channel I2C mux, 20-TSSOP, identical functionality for cross-supply chain flexibility.
● Microchip MCP23017-E/SS: I2C expander, 16-bit I/O, alternative for multi-channel I2C expansion.
● ON Semiconductor CAT9544TD-GT3: 4-channel I2C mux, 20-TSSOP, low-power substitute with similar electrical characteristics.
