LTC4311ISC6

LTC4311ISC6 is Linear Technology’s I2C bus isolation/switch device intended to protect and isolate I2C peripherals during power sequencing and hot‑swap events. It lets an I2C master on one rail communicate with devices on another rail without back‑powering or disturbing powered domains, while helping to minimize glitches during supply ramp/down.
Key points:
- Provides power‑supply isolation for an I2C bus and supports safe bus operation during power sequencing.
- Includes control/enable and fault/status signaling to indicate bus/rail conditions.
- ISC6 denotes the specific package variant for this part (footprint/pinout), so check the datasheet for exact dimensions and pin configuration.
Typical uses include protecting I2C devices on a powered-down rail, preventing back‑powering, and ensuring clean I2C operation when multiple supply domains are present. For exact electrical specs and footprint, refer to the LTC4311ISC6 datasheet.

Here are the typical features of the LTC4311ISC6 (I2C/SMBus switch with protection) in concise form:
- 6-pin ISC package (space-saving)
- I2C/SMBus compatible interface
- Integrated protection for downstream I2C path (fault/overcurrent protection)
- Fault/Status output pin (open-drain)
- Undervoltage lockout with power-good indication
- Overvoltage/short-circuit protection on the protected leg
- Low quiescent current for battery-powered apps
- Adjustable or inherent current-limit behavior for the protected line
- Slew-rate control and reliable hot-swap behavior on connect/disconnect
Note: For exact electrical specs (voltage ranges, current limits, timing, and pinout), please reference the LTC4311ISC6 datasheet.

- Pin count: 6 pins (SOT-23-6, ISC6 package)
- Function: I2C/SMBus bus buffer and level shifter (bidirectional I2C bus buffer used to isolate/translate between two I2C buses).

- Manufacturer: Analog Devices, Inc. (ADI).
- What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits; it acquired Linear Technology in 2017 (LTC products originate from Linear Technology).

Applications of LTC4311ISC6:
- Hot-swap control for I2C/SMBus peripherals in backplanes, motherboards, and add‑on cards
- Current‑limit and fault protection on the I2C device supply during insertion/removal
- Power-up/power-down sequencing and rail isolation in multi-rail systems
- I2C bus isolation/level shifting to prevent backfeeding across rails
- Suitable for telecom, data communications, industrial control, automotive, and consumer electronics backplanes

8-lead plastic Small Outline package (SO-8), RoHS-compliant.