ARPS1050A5/ARPS1020A5
Radiation Hardened level translating I²C, SMBUS, SPI 16-bit I/O expander family
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APIO16/AFIO16
Product Overview
The AxIO16 is a radiation-hardened by design level translating I2C, SMBUS, SPI I/O expander family 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 both Low Earth Orbit (LEO) and Geostationary Earth Orbit (GEO) environments.
- 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
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Block Diagram
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TSSOP28 Package
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Pinout
Technical Documentation
★ = Top documentation for this product
| Type | Title | Format | Date | |
|---|---|---|---|---|
| ★ | Datasheets | APIO16/AFIO16 Radiation Hardened 16-bit level translating I²C, SMBUS, SPI IO expander | 06 May 2025 | |
| ★ | Reports | APIO16 Total Ionizing Dose (TID) Radiation Test Report | 23 May 2025 | |
| ★ | Reports | AxIO16 Single-Event Effect (SEE) Radiation Test Report | 23 May 2025 | |
| ★ | Product Flyer | APIO16/AFIO16 Overview | 23 May 2025 | |
| ★ | Application Note | APIO16-AFIO16: Practical Applications in Control Sensing and Power Management | 23 May 2025 | |
| Application Note | Evaluation Grade (E-Grade) Definition | 23 May 2025 | ||
| Reports | APIO16/AFIO16 Material Content Report | 06 Nov 2025 | ||
| Product Brochure | Apogee Semiconductor Product Catalog 2025 | 23 May 2025 | ||
| White Paper | The Logic of Cold Sparing Enabling Resilient Systems with Advanced Components | 23 May 2025 | ||
| White Paper | Limit the Impact of COTS Failures in Commercial Space with Apogee’s Relbridge (Co-authored by JPL) | 23 May 2025 | ||
| Quality | Product Grades and Quality Flows | 11 Jun 2025 |
Design and Development
★ = Top documentation for this product
| Type | Title | Format | Date | |
|---|---|---|---|---|
| ★ | Hardware | APIO16-EVB Evaluation Board (EVB) User’s Guide | 23 May 2025 | |
| ★ | Hardware | APIO16-EVB EU Declaration of Conformity (DoC) | 23 May 2025 | |
| ★ | Model | AxIO16 I²C QSPICE User’s Guide | 24 Oct 2025 | |
| ★ | Model | AxIO16 I²C QSPICE Simulation Testbench | ZIP | 24 Oct 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 |
| ★ | CAD Footprints, Symbols, & 3D Models | AFIO16 Schematic Symbol | CAD Model | 03 Oct 2025 |
| ★ | CAD Footprints, Symbols, & 3D Models | AFIO16 Schematic Footprint | CAD Model | 03 Oct 2025 |
| ★ | CAD Footprints, Symbols, & 3D Models | AFIO16 ECAD 3D Model File | KICAD_MOD | 03 Oct 2025 |
| ★ | CAD Footprints, Symbols, & 3D Models | AFIO16 STEP (.stp) Model File | STP | 03 Oct 2025 |
APIO16-EVB Top and Bottom Side Pictures
Ordering
| Part Number | Pedigree | Package | Pins | Burn-In | Lead Finish | Standard Lead Time (weeks) | RFQ | Purchase |
|---|---|---|---|---|---|---|---|---|
| APIO16ENT-R | Evaluation | TSSOP | 28 | No | NiPdAu | 4 | Contact Us | Arrow.com, Mouser.com |
| APIO16ANT-R | Flight Grade ‘A' | TSSOP | 28 | Yes | NiPdAu | 9 | Contact Us | Contact Us |
| APIO16BNT-R | Flight Grade ‘B' | TSSOP | 28 | No | NiPdAu | 7 | Contact Us | Contact Us |
| APIO16CNT-R | Flight Grade ‘C' | TSSOP | 28 | No | NiPdAu | 6 | Contact Us | Contact Us |
| AFIO16ENT-R | Evaluation | TSSOP | 28 | No | NiPdAu | 4 | Contact Us | Contact Us |
| AFIO16ANT-R | Flight Grade 'A' | TSSOP | 28 | Yes | NiPdAu | 9 | Contact Us | Contact Us |
| AFIO16BNT-R | Flight Grade 'B' | TSSOP | 28 | No | NiPdAu | 7 | Contact Us | Contact Us |
| AFIO16CNT-R | Flight Grade 'C' | TSSOP | 28 | No | NiPdAu | 6 | Contact Us | Contact Us |