ISOW7844DWER

ISOW7844DWER is Texas Instruments’ isolated quad RS-485/RS-422 transceiver. It provides four independent differential transceiver channels with galvanic isolation between the logic side (microcontroller) and the bus side, enabling safe, long-distance, multi-point industrial communications.
Key points:
- Four RS-485/RS-422 transceivers in one device
- Galvanic isolation between sides for each channel
- Independent DI/DE/RE control per channel; enables flexible bus topologies
- Features such as failsafe receivers and protection against common-mode transients
- Suitable for industrial automation, motor control, remote sensing, and distributed control systems
- Packaging: DWER (tape-and-reel option)
For exact isolation voltage, data rates, supply rails, timing, and pinout, refer to the ISOW7844 datasheet.

Equivalent devices (4-channel isoSPI digital isolators from other vendors):
- TI ISO7840/ISO7842 family
- Analog Devices ADuM1250/ADuM1251
- Broadcom/Avago HCPL-7840/7841/7842
- Renesas ISOW7841/7843 (same isoSPI family)
Note: verify pinout, voltage, isolation rating, and data-rate to ensure compatibility with your design.

ISOW7844DWER features (concise):
- Isolated quad-channel digital isolator (isoSPI/SPI compatible) with four independent data channels
- Galvanic isolation between primary side (VDD1) and secondary side (VDD2)
- Isolation rating: typically around 2.5 kV RMS (basic insulation)
- Separate supply rails for each side: VDD1 and VDD2, supports 3.3 V or 5 V logic on each side
- High-speed data: up to tens of Mbps per channel (typical up to ~25 Mbps)
- Low propagation delay and good channel-to-channel skew; high common-mode transient immunity
- Wide operating temperature range (Industrial: -40°C to +125°C)
- ESD and protection features; input overvoltage tolerance
- Small package (DWE suffix indicates RoHS-compliant, tape-and-reel packaging; commonly SOIC-16)
- Applications: isolated SPI interfaces for MCUs, sensors, DAC/ADC, motor drives, and industrial automation
Note: Please refer to the exact datasheet for precise voltage, speed, and package details.

- Pin count: 16 pins (16‑pin package)
- Function: Quad-channel digital isolator with integrated isoPower. Provides four bidirectional data channels across a galvanic isolation barrier, with separate supplies on each side (VCCA/VGNA and VCCB/VGNB) for isolating a microcontroller or logic from a high-voltage/noisy domain (SPI/I2C/UART interfaces possible).

The ISOW7844DWER is manufactured by Texas Instruments (TI). TI is an American multinational semiconductor company that designs and manufactures analog and embedded processing chips and provides semiconductor-based solutions for automotive, industrial, personal electronics, and communications markets. It is one of the world's largest semiconductor manufacturers.

ISOW7844DWER is used in systems needing galvanic isolation between high-voltage/noise domains and low-voltage logic. Typical applications include:
- Industrial automation and PLC I/O isolation
- Motor control and robotics
- Automotive/EV power electronics
- Medical instrumentation with patient isolation
- Power supplies, inverters, and smart grid equipment
- Data acquisition, instrumentation, and harsh-environment sensor interfaces

ISOW7844DWER uses a 16‑pin small‑outline package (SOIC‑16), RoHS compliant, supplied in Tape & Reel.