NI DAQCard-6533 High-Speed Digital I/O Device

The NI DAQCard-6533 is a high-speed digital I/O device for PCMCIA-equipped systems requiring real-time data acquisition and control. It delivers 32 individually configurable digital I/O lines operating at 5 V TTL/CMOS logic levels, with each line capable of sinking or sourcing 24 mA. The device achieves a maximum transfer rate of 20 MHz (80 MB/s throughput) and supports 8, 16, or 32-bit transfers. Integrated triggering capabilities include start/stop, pattern detection, and change detection, while a 16-sample FIFO buffer manages data flow. Input signals are diode-terminated to dampen noise at TTL levels. Four dedicated output/control channels and four dedicated input/status channels provide flexible signal routing for automated testing, industrial control systems, and scientific instrumentation.

– Technical Specifications

Digital I/O Characteristics
• 32 digital I/O lines, individually configurable as input or output
• 5 V TTL/CMOS compatible logic levels
• Per-line current capability: 24 mA sink/source
• Input signal termination: diode-terminated
• Supported transfer formats: 8, 16, or 32-bit

Performance Metrics
• Maximum transfer rate: 20 MHz
• Maximum data throughput: 80 MB/s
• Minimum pulse width (edge triggers): 10 ns
• Input hysteresis: 500 mV
• FIFO depth: 16 samples

Trigger and Control
• Start/Stop triggering
• Pattern trigger detection
• Change detection
• Four dedicated output and control channels
• Four dedicated input and status channels

Physical and Electrical
• Dimensions: 8.6 cm × 5.3 cm (3.4 in. × 2.1 in.)
• Interface: PCMCIA connector via 68-pin cable
• Power supply: +4.65 to +5.25 VDC at 250 mA (500 mA total)

– Key Features

Flexible I/O architecture supports parallel data transfers and multi-bit operations for time-critical applications. Diode termination on input lines reduces signal overshoot and ringing in high-frequency switching environments. The 16-sample FIFO decouples transfer rates from software latency.

– Typical Applications

Automated test equipment, industrial control systems, parallel device programming, and scientific data acquisition requiring sustained multi-megahertz I/O throughput.

– Compatibility & Integration

Operated through NI-DAQ Traditional (Legacy) driver software. Supported platforms include Windows 2000/XP/NT, Windows Me/9x, Mac OS 9, and Mac OS X. Compatible development environments: LabVIEW, LabWindows/CVI, Measurement Studio, Visual Basic, and C/C++.