NXP USA Inc. PCA9548APW,112
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 24-TSSOP (0.173", 4.40mm Width) |
| Interface | I²C, SMBus |
| Mfr | NXP USA Inc. |
| Mounting Type | Surface Mount |
| Applications | Translating Switch |
| Supplier Device Package | 24-TSSOP |
| Voltage - Supply | 2.3V ~ 3.6V, 4.5V ~ 5.5V |
| Package | Tube |
| Product Status | Obsolete |
| Base Product Number | PCA95 |
| REACH Status | REACH Unaffected |
| Standard Package | 1,575 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
PCA9548APW,112 NXP 8-Channel I2C Switch with Reset
The PCA9548APW,112 is an 8-channel bidirectional I2C bus switch with reset functionality, designed by NXP Semiconductors to address complex I2C address conflicts in multi-device systems. It enables a single I2C master to communicate with up to eight downstream I2C buses by selectively routing SCL/SDA pairs through programmable channels. Each channel operates independently, allowing dynamic reconfiguration without disrupting other buses. The device supports voltage level translation between 1.8V, 2.5V, 3.3V, and 5V systems, making it ideal for mixed-voltage environments. Its active-low reset input resolves bus lock-up scenarios by resetting the I2C state machine and deselecting all channels.
Technical Specifications
The PCA9548APW,112 features eight low-Ron (low resistance) bidirectional switches controlled via an I2C-compatible interface. It supports clock frequencies from 0Hz to 400kHz and operates with a supply voltage range of 2.3V to 5.5V. Each I/O pin is 5V-tolerant, enabling seamless integration with higher-voltage peripherals. The device includes three hardware address pins, allowing up to eight PCA9548A devices to share a single I2C bus. Key features include hot insertion support, no glitch during power-up, and latch-up immunity exceeding 100mA per JESD78 standards. ESD protection exceeds 2000V HBM (Human Body Model) and 1000V CDM (Charged Device Model). The TSSOP-24 package measures 7.8mm x 4.4mm with a 1.1mm maximum height, facilitating automated PCB assembly.
Alternative I2C switch Models
● TCA9548APWR (Texas Instruments): An 8-channel I2C switch with similar voltage translation and reset features, but with a wider 1.65V to 5.5V operating range.
● PCA9517ADGKR (NXP): A dual-channel I2C level shifter offering higher clock speeds (up to 1MHz) for performance-critical applications.
● TS3A27518EPWR (Texas Instruments): An 8-channel analog multiplexer with I2C control, suited for mixed-signal routing but lacking voltage translation.
● LTC4316IUFP#PBF (Analog Devices): A 4-channel I2C buffer with active-low interrupt and overvoltage protection, designed for high-noise environments.
