NCA9545-DTSR

The NCA9545-DTSR is a 4-channel I²C bus switch from ON Semiconductor, designed to manage multiple I²C devices with the same address. It enables communication between a master and up to four downstream I²C buses, selecting one at a time via control pins.
### Key Features:
- 4 bidirectional channels for I²C/SMBus switching.
- Low standby current (1 µA max) for power efficiency.
- 1.65V to 5.5V operating voltage, compatible with various logic levels.
- Interrupt input for monitoring downstream devices.
- Small TSSOP-20 package (DTSR), ideal for space-constrained designs.
### Applications:
- Expanding I²C bus capacity in embedded systems.
- Isolating devices to prevent address conflicts.
- Used in servers, industrial controls, and consumer electronics.
The NCA9545-DTSR simplifies I²C multiplexing, enhancing system flexibility while maintaining signal integrity.

The NCA9545-DTSR is a 4-channel I²C multiplexer. Equivalent alternatives include:
- PCA9545A (Texas Instruments)
- TCA9545A (Texas Instruments)
- MAX4545 (Maxim Integrated)
- ADG5245 (Analog Devices)
These chips offer similar I²C multiplexing functionality with 4 channels. Verify pin compatibility and voltage requirements for your application.

The NCA9545-DTSR is a 4-channel I²C bus switch with interrupt logic and reset. Key features:
- 4 Bidirectional Channels: Routes I²C signals between 1 upstream and 4 downstream buses.
- I²C-Compatible Interface: Supports standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) modes.
- Interrupt Handling: Monitors downstream interrupts and alerts the host.
- Low Standby Current: <1 µA in power-down mode.
- Voltage Translation: Operates at 1.65V to 5.5V, enabling mixed-voltage systems.
- Software Reset: Configurable via I²C command.
- Small Package: 16-pin TSSOP (DTSR).
Ideal for expanding I²C networks in embedded systems.

The NCA9545-DTSR is a 4-channel I²C multiplexer with 20 pins (TSSOP package). Key functions:
- Channels: 4 bidirectional I²C/SMBus channels (SCL/SDA pairs).
- Control: Selects one active channel at a time via I²C commands.
- Voltage: Supports 1.8V to 5.5V logic levels.
- Interrupts: 4 interrupt inputs (INT3–INT0) for monitoring downstream devices.
- Reset Pin: Active-low reset (RESET) for initialization.
Typical applications include expanding I²C bus connectivity to multiple devices with identical addresses.
Package: TSSOP-20.
Pinout includes VDD, GND, SCL/SDA (main bus), channel SCLx/SDAx (x=0–3), and interrupt pins.

The NCA9545-DTSR is manufactured by ON Semiconductor, now known as onsemi after rebranding in 2021.
onsemi is a global semiconductor company specializing in power management, sensing, and connectivity solutions for automotive, industrial, and consumer markets. Known for energy-efficient innovations, it provides components like ICs, sensors, and power modules.
The NCA9545-DTSR is a 4-channel I²C bus switch, used for managing multiple I²C devices efficiently. onsemi is recognized for reliable, high-performance semiconductor solutions.

The NCA9545-DTSR is a 4-channel I²C bus switch with interrupt logic, offered in a TSSOP-20 package. This surface-mount package is compact, measuring 6.5mm x 4.4mm, and is suitable for space-constrained applications. It supports 1.65V to 5.5V operation and features low standby current. The TSSOP-20 package ensures reliable performance in industrial and consumer electronics.