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Holt Integrated Circuits is a leading supplier of data bus communication ICs, primarily servicing the military, aerospace and industrial markets. Holt designs and tests all its products in-house, providing innovative, cost effective, mixed signal solutions for microprocessor-based embedded applications. Holt’s product lines include MIL-STD-1553, ARINC 429, Discrete-to-Digital sensing, Controller Area Network (CAN), analog switches and RS-485/422. Products are designed into hundreds of applications ranging from flight control and engine management to in-flight entertainment systems and test equipment.
Holt Integrated Circuits is a well established provider of analog and mixed signal IC data bus solutions to the avionics industry, supplying more than 400 manufacturers worldwide in a wide variety of applications such as flight control, navigation, engine management, communications, safety equipment, and in-flight entertainment systems.
In addition, Holt also leverages versions of its avionics products in other markets requiring highly reliable and robust components, such as industrial and process automation.
Located in Mission Viejo, California, Holt Integrated Circuits is a major supplier of Integrated Circuits for the aerospace industry. For over twenty years, Holt has manufactured data bus and display drivers for both commercial and military users worldwide.
Holt Integrated Circuits is a major supplier of ICs for avionics and military aircraft data bus and display applications. The company’s products are specified by more than 400 manufacturers worldwide and are employed in flight control, navigation, engine management, communications, safety equipment, and in-flight entertainment systems.
Holt is the market leader in ICs supporting the ARINC 429 standard, supplying everything from analog transceivers to full protocol chips with RAM. Select ICs feature built-in lightning protection for DO-160G section 22 compliance, integrated analog transceivers and digital protocol, and include DC-DC converters for single-supply operation.
Holt’s MIL-STD-1553 transceivers are recognized as the industry’s smallest, having the lowest power consumption. In addition, Holt MIL-STD-1553 integrated terminals offer the most compact, cost effective solution available on the market, integrating protocol, transceiver and transformers in a single 16mm x 16mm package. Holt’s latest MAMBA family offers BC/RT/MT protocol and transceivers in the World’s smallest footprint, 6mm x 6mm.
Other data bus products include ARINC 717, CAN (ARINC 825), RS-485/422 and analog switches. Select products are available to DSCC SMD specifications. Holt also offers product compliant to the European Union “RoHS Directive 002/95/EC”.
Holt Integrated Circuits is ISO 9001:2015 & AS9120 registered and is a STACK certified supplier and recipient of the STACK International 2012 Gold Supplier Award.
Holt Integrated Circuits: Leading Provider of Data Bus Solutions for Avionics
For over 40 years, Holt Integrated Circuits has been a trusted supplier of analog and mixed-signal IC data bus solutions to the global avionics industry. Their products are used in a wide range of applications, including flight control, navigation, engine management, communications, safety systems, and in-flight entertainment, serving over 400 manufacturers worldwide. Holt’s expertise extends beyond avionics, with versions of their products being utilized in other high-reliability markets such as down-hole drilling and industrial process automation.
Product Portfolio:
MIL-STD-1553
Holt offers a comprehensive range of IC options for MIL-STD-1553 designers, with highly integrated products that provide full protocol and transceiver functionality on a single chip, including BC/MT/RT, on-chip RAM, and dedicated host interface options. They also supply standalone transceivers and transformers compatible with FPGA and older discrete designs.
Software
Holt supports its products with reference designs, development kits, and software, enabling faster design cycles. They collaborate with partners to offer development tools for platforms such as Bare Metal (ARM), Windows 10, Wind River® VxWorks® RTOS, and Linux.
Applications
- Military and Commercial Avionics
- Transportation
- Oil Exploration
ARINC 429
Holt holds the largest ARINC 429 IC product portfolio, from simple analog bus interfaces to protocol ICs with on-chip FIFOs or RAM. Their fully integrated solutions include analog transceivers and digital protocol, with the latest line of ARINC 429 terminal ICs operating from a single 3.3V supply and featuring SPI interfaces. These devices also offer internal lightning protection in compliance with RTCA/DO-160G standards.
Applications
- Guidance and Navigation Systems
- Flight Control
- Flight Data
- Communications
- In-Flight Entertainment Systems
LCD Display Drivers
Holt’s LCD Display Drivers are designed for high-voltage LCD applications, converting 5V serial data to parallel waveforms with amplitudes up to 30V. These devices are cascadable, making them suitable for larger displays.
Applications
- Dichroic Liquid Crystal Displays
- Standard Liquid Crystal Displays
ARINC 825 (CAN)
Holt is the first to offer an ARINC 825-compliant CAN controller with an integrated transceiver. Their CAN devices support digital logic from 2.5V to 5V and operate across a wide temperature range (-55°C to +125°C, with select products up to 200°C). These devices offer features like deep FIFOs, flexible frame filtering, short-circuit protection, and a compact footprint. They also provide protocol bridge ICs to connect ARINC 429 and ARINC 825 (CAN) buses.
Discrete-to-Digital / Drivers
Holt offers Discrete-to-Digital components for sensing Open/Ground and 28V/Open signals, ideal for applications like hatch or door detection. Driver products offer flexibility to control various loads.
RS485 / 422
Holt’s RS-485/422 transceivers are designed to meet specific application needs, featuring high-temperature operation (up to 200°C), controlled slew rate for optimized EMI performance, and full or half-duplex versions.
ARINC 717
The HI-3717 device, designed for flight data recorders, communicates with microcontrollers via SPI and supports HBP and BPRZ channels with encoders/decoders. It also includes line drivers and receivers for direct ARINC 717 bus connection.
Analog Switches
Holt’s analog switches, available in various configurations, are built on silicon-on-insulator (SOI) technology for latch-up-free operation and low leakage, ideal for precision applications. Select products are rated for operation up to 200°C.
Ethernet
Holt provides Ethernet PHY transceivers designed for avionics with extended temperature ranges (-55°C to 125°C) and optional burn-in, ensuring reliability and eliminating the need to up-screen commercial devices.
Holt’s comprehensive portfolio and in-house control over production enable them to meet the demands of critical industries, offering robust and reliable solutions for both standard and specialized applications.
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