High-Density TTL Digital IO for Embedded Defence and Aerospace Systems
As embedded systems continue to demand greater functionality within smaller footprints. The Acromag QMC470 provides an efficient TTL Digital IO Module that maximises channel density without increasing system size.
The module offers 40 bidirectional digital I/O channels. Along with TTL-compatible inputs and CMOS-compatible open-drain outputs. Therefore, allowing a single module to interface with a wide range of digital devices. Individual channels support programmable interrupt generation. Enabling rapid detection of change-of-state, rising-edge or falling-edge events. In addition, programmable de-bounce, minimises false triggering caused by electrical noise or switching transients.
Unlike traditional hardware-configured I/O modules, the QMC470 is entirely software configurable. Therefore, allowing configuration changes without jumpers, switches or module removal. Output readback registers provide closed-loop verification of output status. Therefore, reducing the need for additional monitoring inputs.
Optimised for Embedded Computing Platforms
The QMC470 conforms to the VITA 93 QMC mezzanine standard and interfaces with host systems via a PCI Express Gen 1 x1 connection. Its compact dimensions (26 mm × 78.25 mm) make it significantly smaller than traditional PMC and XMC modules, allowing multiple functions to be combined on a single carrier card while supporting systems with strict Size, Weight, Power and Cost (SWaP-C) requirements.
The module can be deployed on a variety of carrier card architectures including:
- PCIe expansion cards
- VPX systems
- CompactPCI platforms
- VNX+ small form factor systems
- Other VITA 93 compatible embedded architectures
An onboard EEPROM supporting Intelligent Platform Management Interface (IPMI) stores module information and sensor data that can be accessed through compatible carrier cards using an I²C interface.
Reliable Digital Signal Control
The QMC470 has been designed for dependable digital I/O operation in demanding embedded environments.
Each input channel incorporates programmable debounce circuitry and input hysteresis for improved signal integrity. Outputs feature integrated pull-up resistors, overvoltage protection and fail-safe startup behaviour, ensuring outputs transition to a defined safe state during power-up or reset without unintended switching. Outputs also support up to 15 mA sink current for direct interfacing with standard relay racks.
Key Features
- 40 bidirectional digital input/output channels
- TTL-compatible digital inputs
- CMOS-compatible open-drain outputs
- PCI Express Gen 1 x1 host interface
- Programmable change-of-state, rising-edge and falling-edge interrupts
- Programmable de-bounce on every channel
- Input hysteresis
- Closed-loop output readback registers
- Electronic overvoltage protection on individual channels
- Software-configurable operation with no jumpers or switches
- VITA 93 QMC mezzanine form factor
- Extended operating temperature options including conduction-cooled models
- IPMI support through onboard EEPROM
- Suitable for high-density embedded computing applications
Applications
The QMC470 TTL Digital IO Module is suited to embedded applications requiring high-density digital monitoring and control, including:
- Defence mission computers
- Aerospace embedded electronics
- FPGA-based embedded systems
- Laboratory instrumentation
- Automated test equipment (ATE)
- Industrial control systems
- Embedded signal processing platforms
- High-density data acquisition and control systems
Frequently Asked Questions
What type of digital I/O does the QMC470 support?
The QMC470 provides 40 bidirectional digital I/O channels with TTL-compatible inputs and CMOS-compatible open-drain outputs.
Does the QMC470 support interrupt-driven operation?
Yes. Every channel supports programmable interrupts for change-of-state, low-to-high and high-to-low transitions, with programmable debounce available to reduce false triggering.
Which embedded platforms are compatible with the QMC470?
The module is designed for VITA 93 QMC carrier cards and can be deployed on platforms including PCIe expansion cards, VPX, CompactPCI and VNX+ systems.
Local Support from Metromatics
Finally, Metromatics supplies Acromag embedded I/O solutions throughout Australia and New Zealand. Supporting defence, and industrial customers with product selection, system integration and technical advice. Our experienced engineering team can help identify the best embedded I/O solution for your application. In addition, assist with integrating QMC modules into new or existing embedded computing platforms.
Request a Quote
Looking for a high-performance TTL Digital IO Module for your embedded computing application?
Contact Metromatics to discuss the Acromag QMC470. Plus receive expert advice on selecting the right QMC carrier cards, embedded I/O modules and system architecture for your project.
