ISO1042QDWRQ1

There isn’t a well-known ISO standard or publication publicly identified as “ISO1042QDWRQ1.” It looks more like a vendor part/model number or internal SKU, not an ISO standard citation. The “ISO” prefix in a part code is often just a naming convention used by manufacturers.
What you likely need to do:
- Provide context (field, manufacturer, product type) or a link/datasheet.
- Search the exact string (in quotes) on the manufacturer’s site and major distributors.
- If a datasheet exists, review features, package type, pinout, and electrical specs to understand what the part does.
- Check for cross-references or alternate part numbers.
If you meant an ISO standard number (e.g., ISO 1042 in a specific domain), please share the topic or field. I can then give a concise introduction to the correct ISO standard. If you provide a link or more details, I’ll summarize it.

Likely equivalents (same function as ISO1042QDWRQ1):
- Analog Devices: ADuM1250, ADuM1251, ADuM1252
- Silicon Labs: Si86xx series (2-channel digital isolators for I2C)
Note: exact pinout, voltages, and isolation ratings must match your design; use TI’s cross-reference tool to confirm an exact substitute.

Here are the typical features of ISO1042QDWRQ1 (autmotive ISO1042-Q1, package DWRQ1):
- Isolated differential bus transceiver for RS-485/RS-422
- Automotive-grade: AEC-Q100 qualified (Q1)
- galvanic isolation between logic side and bus side (high isolation voltage)
- Separate logic and bus supplies (isolated power domains)
- Fail-safe receiver (known output state with open/shorted inputs)
- Protection features: undervoltage lockout, short-circuit/overcurrent protection, ESD protection on bus pins
- Wide operating temperature: -40 °C to 125 °C
- Low quiescent current
- High-speed differential signaling suitable for multipoint/bus networks
- 8-pin DWRQ1 package
Note: exact isolation voltage, data rate, and additional protections can vary by revision; refer to the TI ISO1042-Q1 datasheet for precise specifications.

Pin count: 16 pins.
Function: A dual-channel, galvanically isolated RS-485/RS-422 transceiver. It provides two independent differential channels (A1/B1 and A2/B2) with separate logic-side pins (DIx, ROx, DE, /RE) and bus-side connections, isolating the logic domain from the RS-485/RS-422 buses.

- Manufacturer: Texas Instruments (TI)
- What kind of company: An American multinational semiconductor company that designs and manufactures analog and mixed-signal ICs, embedded processors, sensors, and related software/tools for automotive, industrial, consumer electronics, and communications markets.

ISO1042QDWRQ1 is a 2-channel digital isolator that provides galvanic isolation between logic domains. It is used to safeguard low-voltage logic from high-voltage/noisy environments in mixed-signal systems. Common application areas:
- Automotive electronics: ECUs, sensor/actuator interfaces, battery management, in-vehicle networks
- Industrial automation: PLC I/O isolation, motor drives, power supplies, isolated measurement
- Power electronics and control: isolated gate drive and controller interfaces
- Medical instrumentation: patient-safety isolation
- General embedded systems requiring isolation between high-voltage/noisy domains and low-voltage logic

The ISO1042QDWRQ1 comes in an 8-pin DWR package (DSSOP/VSSOP‑8), RoHS Pb‑free (Q1).