SI8441BB-D-IS1R

SI8441BB-D-IS1R is a single-channel digital isolator (an isolated data interface) from the SI84xx family. It provides galvanic isolation between the input logic domain and the output domain, allowing a signal to cross a safety/isolation barrier without a direct electrical connection.
Key points:
- One-channel isolation with separate input and output supplies (logic-level compatibility typically 3.3–5 V on both sides).
- Push-pull output suitable for driving gates or logic loads on the isolated side.
- Fast propagation delay suitable for digital control and isolation of noisy/high-voltage domains.
- Used for isolating microcontroller or logic from high-voltage or noisy sections (e.g., gate drives for IGBTs/METs, isolated I/O, motor drive interfaces).
- Encapsulated in an 8-pin package (D suffix denotes package type); variants like IS1R define orientation/variant options.
Note: exact specs (isolation voltage, propagation delay, CTR, temperature range) vary by revision. Always consult the latest datasheet for SI8441BB-D-IS1R to confirm electrical characteristics, operating conditions, and RoHS/compliance details.

Key features of SI8441BB-D-IS1R (1-channel digital isolator):
- 1-channel isolated digital interface (input to output) with galvanic isolation
- Isolation rating: 2.5 kV RMS between sides
- Common-Mode Transient Immunity (CMTI): ≥25 kV/µs
- Data rate: up to approximately 25 Mbps (typical)
- Propagation delay: ~30 ns (typical)
- Dual supplies: VDD1 (input side) and VDD2 (output side); compatible with 3.3 V or 5 V logic on both sides
- TTL/CMOS-compatible input thresholds; push-pull/rail-to-rail output
- Industrial temperature range: −40 °C to +125 °C
- Package: 8-pin packaged device (SOIC) with RoHS-compliant, available in Tape & Reel (IS1R)
- Applications: microcontroller isolation, isolated I/O, motor control, sensing/DAQ interfaces
Note: Values can vary by variant; please confirm exact numbers in the specific datasheet for SI8441BB-D-IS1R.

An 8-pin SOIC (small‑outline) package.

- Pin count: 8 pins (SOIC-8/D-IS1R package).
- Function: Single-channel digital isolator (galvanically isolates input from output; requires separate Vcc1 and Vcc2 on each side to transfer a logic signal across the isolation barrier).

- Manufacturer: Vishay Intertechnology, Inc.
- What kind of company: A multinational electronics components manufacturer that designs and produces discrete semiconductors (e.g., MOSFETs, diodes, optocouplers, solid‑state relays) and passive components (resistors, capacitors, inductors) for automotive, industrial, consumer, and communications markets.

Applications (SI8441BB-D-IS1R):
- Isolated gate drive for MOSFETs/IGBTs in switch‑mode power supplies and DC‑DC converters
- Motor control (BLDC/PMSM, servo drives) and drive inverters
- Solar inverters, battery chargers, UPS power stages
- Industrial automation and power management equipment
- Telecom/data-center power supplies and any system needing galvanic isolation with fast switching.

Equivalent 4-channel digital isolators (cross-reference):
- TI ISO784x family (ISO7841/7842/7844)
- Analog Devices ADuM1400/ADuM1410 series
- Renesas (Intersil) ISL844x family
- Broadcom/ Avago HCPL-7840/HCPL-7841
These offer similar 4-channel isolation and logic-level interfaces. Verify exact isolation voltage, supply rails, timing, and pinout before substitution.