HI-3220PQIF

Overview

The HI-3220PQIF is a single-chip CMOS high-density application data management IC from Holt Integrated Circuits, designed for avionics data bus solutions. It manages, stores, and forwards ARINC 429 messages between 16 receive channels and 8 transmit channels, serving as an ideal data concentrator. The device features 32KB of onboard memory and 64-message depth receive FIFOs per channel. It connects via a 40 MHz 4-wire SPI host interface and supports automatic reformatting, relabeling, and repacking of data. The unit includes integrated ARINC 429 line receivers compatible with RTCA/DO-160 Level 3 lightning protection using external 40kΩ resistors. It operates within a supply voltage range of 3.15V to 3.45V and an operating temperature range of -40°C to 85°C.

Feature Summary

• Manages, stores, and forwards ARINC 429 data messages across multiple independent receive and transmit channels.
• Supports automatic initialization from external EEPROM for rapid startup without host CPU software overhead.
• Integrates ARINC 429 line receivers capable of achieving RTCA/DO-160 Level 3 lightning compatibility.
• Features programmable schedulers for independent transmitter control or host CPU insertion of new labels.

Applications

• Flight control systems
• Navigation equipment
• Engine management units
• Avionics data concentrators

Procurement Notes

Verify the specific suffix 'IF' confirms the -40°C to 85°C industrial temperature grade and 3.15V–3.45V supply range, distinct from other variants like 'M' which may support -55°C to +125°C. Confirm the 80-pin LQFP package matches design constraints. Ensure compliance with DO-178 or DO-254 certification requirements if utilizing the auto-initialization feature. Cross-reference the manufacturer's official datasheet for pinout accuracy and electrical specifications before integration.

Selection Notes

Select this model when a compact solution for managing up to 16 receive and 8 transmit ARINC 429 channels is required. Choose the HI-3220PQIF over HI-3222/HI-3223 if the larger 80-pin PQFP package is acceptable in exchange for full channel count capabilities. Opt for this variant over HI-3225/HI-3226 when integrated line receivers are preferred over external driver configurations. Consider the 32KB onboard memory and FIFO depths for buffering requirements in data concentrator applications.

Part Context

Holt Integrated Circuits has supplied avionics data bus solutions for over 20 years, supporting manufacturers worldwide. The HI-3220 series represents their widest selection of protocol ICs for the ARINC 429 standard. These components are deployed in commercial aircraft and military helicopter programs, including Blackhawk and Apache platforms. The family includes devices with integrated DC/DC converters and on-board lightning protection, simplifying system design for critical flight environments.

Replacement Considerations

HI-3220PQM and HI-3220PQT offer alternative temperature grades (-55°C to +125°C) within the same 80-pin PQFP package. HI-3221PCI provides a 72-pin QFN option with similar functionality but different physical dimensions. HI-3225PQIF serves as a variant using external line receivers instead of integrated ones. Verify pin compatibility and thermal specifications when substituting.