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PCA9544APWR - Analog Multiplexer Interface Specialized IC TSSOP-20

Texas Instruments

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SKU:
035-PCA9544APWR
MPN:
PCA9544APWR
PCA9544APWR quad 4-channel I²C analog multiplexer in 20-pin TSSOP package, full reel.
Quantity
Unit Price (ex. GST)
1 - 9
₹ 222.51
10 - 99
₹ 200.26
100 or above
₹ 178.01
PCA9544APWR is a quad 4x1 I2C/SMBus multiplexer with integrated interrupt logic, bidirectional switches, and voltage-level translation (1.8V–5V). TSSOP-20 package. Ideal for expanding I2C buses and managing multiple devices securely View full description
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Technical Specifications

Brand:
Texas Instruments
Case/Package:
TSSOP
Number of Pins:
20
Max Operating Temperature:
85 °C
Min Operating Temperature:
-40 °C
Max Supply Voltage:
5.5 V
Min Supply Voltage:
2.3 V
Max Frequency:
400 kHz
Number of Channels:
4

Warranty Information

All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.

Description

The PCA9544A is a highly versatile, 4-channel bidirectional I2C bus multiplexer, designed to allow a single I2C master to interface with up to four independent slave devices. Controlled via a standard I2C control register, it supports selective switching of SCL/SDA lines to one of four downstream channels. Each channel features a dedicated interrupt input (INT0–INT3), while a common INT output signals the master via logical ANDing. The device also includes a power-on reset function that initializes the internal state machine with no channel selected, ensuring consistent startup behaviour. Engineered with pass-gate architecture, the PCA9544A enables voltage-level translation, allowing components operating at 1.8V, 2.5V, or 3.3V to safely communicate with 5V devices, eliminating the need for external logic level converters. Ideal for complex embedded systems, multi-sensor modules, and mixed-voltage designs, this IC offers a reliable, low-latency switching solution across I2C buses.

Datasheet

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