Hotswap I2C buffer — what the 400kHz and 3mA mean for a live backplane
The LTC4300A-3CMS8#TRPBF is a 2-channel I2C buffer and accelerator purpose-built for hotswap applications — it lets you plug a card into a live I2C bus without corrupting the clock or data lines or pulling the bus low. Rated for 400 kHz data rate, it supports standard I2C Fast-mode operation. The 3 mA supply current is the chip's own draw; the bus pull-up resistors add to the total load, but the buffer isolates that from the backplane side during insertion. The 10 pF input capacitance per channel is low enough that adding the buffer to an existing bus doesn't significantly load the upstream master's rise time budget.
Package and temp grade — commercial MSOP for controlled environments
Housed in an 8-MSOP package (3.00 mm body width), the LTC4300A-3CMS8#TRPBF is a surface-mount part suited for reflow assembly. The supplier device package is 8-MSOP. Shipped in Tape & Reel (TR) with Cut Tape (CT) option — the TR suffix on the order code signals reel packaging for automated pick-and-place.
Active production and compliance — no end-of-life concern
ROHS3 compliant per the lifecycle entry. The closest sibling in form and function is the tube-packaged LTC4300A-3CMS8#PBF — same die, same ratings, same pinout, just shipped in a tube instead of a reel. If your assembly line runs tubes, that variant is a direct drop-in.