Plano, Texas — October 4, 2025 — Apogee Semiconductor today announced the APIO16/AFIO16 radiation hardened 16bit I/O expander family is flight qualified, giving system integrators the flexibility to align reliability goals, budgets, and schedules with their mission requirements. The family expands digital I/O via I²C/SMBus/SPI interfaces and integrates level translation across 1.4 V to 5.5 V rails, enabling robust, scalable control architectures while conserving FPGA and processor resources. The APIO16 targets LEO missions with 30 krad (Si) total dose resilience, while the AFIO16 extends the family to GEO class environments with 300 krad (Si) resilience using the same 28pin TSSOP footprint to simplify upgrades.
To support programs where supply chain trust is critical, AxIO16 is designed in the USA and manufactured onshore in a Trusted DMEA (Category 1A) foundry. This provides an added layer of confidence for Defense and Space customers aligning to DoD trusted supplier expectations.
This flight grade release builds on Apogee’s evaluation grade version of the APIO16 and advances system fault containment: placing resilient, intelligent interface devices at the edge to provide detection and fault containment at domain boundaries, preventing propagation across power and logic domains. APIO16/AFIO16 complements Apogee’s RelBridge™ portfolio, enabling system level resilience without over hardening every node.
“With flight grade options now available for APIO16/AFIO16, engineering teams can standardize on one I/O expander architecture and choose the screening flow and grade that fits their mission profile and cost objectives,” said Mark Hamlyn, General Manager of Apogee Semiconductor.
Key capabilities
- Dual protocol interface: I²C/SMBus (up to 1 MHz) and SPI (up to 25 MHz)
- Built-in level translation
- System resilience: triple redundant architecture, cold sparable I/Os, power-on reset, and open drain INTB for change of state alerts
- Scale: 4 address pins (up to 16 I²C addresses) and up to 256 control channels per I²C bus
Radiation performance
- TID variants: APIO16 (LEO) ~30 krad (Si) and AFIO16 (GEO) ~300 krad (Si)
- SEE robustness: immune up to ~75 MeV·cm²/mg LET (heavy ion tested)
- Package & temp: 28‑pin TSSOP, −55 °C to +125 °C
Ordering & availability
APIO16/AFIO16 is offered in Flight Grade A (with burn-in), B, and C and Evaluation Grade (E). APIO16/AFIO16 Product Page :
Contact Apogee for flight grade orders and current lead-time confirmation: orders@apogeesemi.com | +1 9725594660.
Resources
- Product page & docs (datasheet, ordering table, radiation reports): APIO16/AFIO16 family
- Original APIO16 announcement (Evaluation Grade): May 27, 2025
- Fault containment: RelBridge™ overview & product pages
About Apogee Semiconductor
Apogee Semiconductor is a leading provider of radiation-hardened semiconductor solutions for space, aerospace, and defense applications. The company develops high-performance microelectronics designed to withstand extreme environments, enabling mission-critical systems in the most challenging conditions.