LTC4300-2CMS8

The LTC4300-2CMS8 is a dual high‑side power switch (hot‑swap device) with I2C control and protection for two downstream rails. It provides independent on/off control for each channel via an I2C-compatible interface, with back‑to‑back MOSFETs to block reverse current. Features typically include current limiting/overcurrent protection, fault reporting, undervoltage/overvoltage protection, and UV/short‑circuit safeguards on each rail. The device is packaged in the 8‑pin CMS8 package (RoHS-compliant, compact). Applications include safely powering and isolating I2C peripherals or subsystems during power sequencing, fault conditions, or hot‑swap scenarios in enclosures, motherboards, backplanes, automotive, and industrial equipment. In short, LTC4300-2CMS8 provides dual, I2C‑controlled hot‑swap protection with current limiting and fault signaling for robust power sequencing and I2C bus protection. For exact electrical specs and register map, consult the latest datasheet.

Key features of LTC4300-2CMS8:
- Dual, bidirectional I2C/SMBus bus buffer with two independent channels for level shifting between two voltage domains.
- Automatic level translation and isolation: hot-swap capable and prevents back-powering when one side is unpowered.
- I2C/SMBus compatibility up to standard I2C speeds (including 400 kHz).
- Robust protection: on‑chip overvoltage/ESD protection on the I2C lines.
- Fault/status monitoring: includes status/diagnostic reporting for bus faults.
- Small 8‑pin CMS8 package with suitable temperature range for industrial/automotive applications.
- Ideal for interfacing devices across different voltage rails, expanding I2C buses, and safely hot‑swapping I2C peripherals.

- Pin count: 8 pins (CMS8 package, MSOP-8).
- Function: I2C-bus isolator/repeater (dual-channel) that provides bidirectional level translation and isolation between two I2C buses, buffering and protecting each side.

Analog Devices, Inc. (ADI). It is a global American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits (ADI acquired Linear Technology, the original LTC line).

Two-channel I2C/SMBus bus protector with level shifting and isolation. Typical applications:
- Level shifting between different I2C voltages (e.g., 3.3V to 5V)
- Buffering/isolating I2C buses to extend length or fan-out
- Hot-swap protection to prevent back-powering when devices are unpowered
- Short-circuit and EMI/ESD protection on I2C lines
- Automotive, industrial, consumer electronics, and embedded systems requiring safe, multi‑voltage I2C interfacing and bus protection.

8-pin MSOP package (MSOP-8), ~3×3 mm body. The -CMS8 suffix denotes the CMS/MSOP package style used for the LTC4300-2.