APIO16

Radiation Hardened level translating I2C, SMBUS, SPI 16-bit I/O expander

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APIO16

Product Overview

The APIO16 is a radiation-hardened by design level translating I2C, SMBUS, SPI I/O expander that is ideally suited for space, medical imaging and other applications demanding radiation tolerance and high reliability. It is fabricated in a BiCMOS process utilizing proprietary radiation-hardening techniques, delivering high resiliency to single-event effects (SEE) and to a total ionizing dose (TID) as might be found in a Low Earth Orbit (LEO) environment.

  • Supports SPI (25MHz) and I2C (1MHz) / SMBUS
  • Interface rail (VCCI) and Port rail (VCCP) operating from 1.4V to 5.5V
  • Level Translation
  • Internal power-on reset (POR)
  • Open drain INTB pin to alert controller when inputs change
  • Cold sparable I/Os with zero power penalty
  • Built-in triple redundancy
  • TID resilience: 30krad (Si) and 300krad (Si) variants
  • SEL/SEU/SEFI immune up to LET of 75 MeV-cm²/mg
  • 4 address pins yielding 16 unique I2C addresses
  • 6 SEU Immune 8-bit data registers
  • Flexible fast comms interface
  • Built-in up/down level translation suitable for modern FPGAs (XPIO)
  • Enables below-rated voltage of COTS FPGAs to mitigate SEL sensitivity
  • Ensures reliable power up and power down responses during hot plug and cold sparing operations
  • Fault detection and containment
  • Simplifies cold sparing implementations
  • Radiation-hardened against Single Event Effect (SEE)
  • Suitable solutions for both LEO and GEO missions
  • Allows up to 256 control channels on one 2-wire I2C bus
  • Enables up to 768 bits of critical system data storage on a single I2C bus
  • Expand number of I/O’s for MCUs and FPGAs
  • Voltage level translation between legacy peripherals and modern FPGAs
  • Health monitoring for remote systems
  • Serialize peripheral monitoring signals
  • Reduce harness size and weight
  • Cold sparable IOs for primary redundant systems
  • Wake from Interrupt (WFI) automatic processor reactivation
  • Power sequencing and fault detection by monitoring power good signals
  • Dynamic Voltage Scaling (DVS) with real-time power rail adjustments
  • Phased-Array antenna element control
  • Preserve mission critical information in power-cycled systems with rad-hard memory storage
  • Basic ADCs and DACs

Technical Documentation

= Top documentation for this product

Type
Title Format Date
Datasheets APIO16 Radiation Hardened 16-bit level translating I2C, SMBUS, SPI IO expander PDF 06 May 2025
Reports APIO16 Single-Event Effect (SEE) Radiation Test Report PDF 23 May 2025
Reports APIO16 Total Ionizing Dose (TID) Radiation Test Report PDF 23 May 2025
Product Flyer APIO16 Overview PDF 23 May 2025
Application Note Leveraging the APIO16: Practical Applications in Control, Sensing, and Power Management PDF 23 May 2025
Application Note Evaluation Grade (E-Grade) Definition PDF 23 May 2025
Product Brochure Apogee Semiconductor Product Catalog 2025 PDF 23 May 2025
White Paper The Logic of Cold Sparing Enabling Resilient Systems with Advanced Components PDF 23 May 2025
White Paper Limit the Impact of COTS Failures in Commercial Space with Apogee’s Relbridge PDF 23 May 2025

Design and Development

= Top documentation for this product

Type
Title Format Date
Hardware APIO16-EVB Evaluation Board (EVB) User’s Guide PDF 23 May 2025
Hardware APIO16-EVB EU Declaration of Conformity (DoC) PDF 23 May 2025
CAD Footprints, Symbols, & 3D Models APIO16 Schematic Symbol CAD Model 24 May 2025
CAD Footprints, Symbols, & 3D Models APIO16 Schematic Footprint CAD Model 24 May 2025
CAD Footprints, Symbols, & 3D Models APIO16 ECAD 3D Model File KICAD_MOD 24 May 2025
CAD Footprints, Symbols, & 3D Models APIO16 STEP (.stp) Model File STP 24 May 2025

APIO16-EVB Top and Bottom Side Pictures

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