The TEAC FD-235HF is a 3.5-inch floppy disk drive engineered for reading and writing data on legacy media. This 1-inch-height internal drive delivers reliable access to High Density (2HD) and Double Density (2DD) formatted disks, supporting unformatted capacities of 2MB and 1MB respectively. Built around a brushless direct-drive motor rotating at 300 RPM, the drive achieves 94ms average access time and maintains an MTBF exceeding 30,000 hours.
Technical Specifications
• Media Support: 3.5-inch High Density (2HD) and Double Density (2DD) floppy disks
• Storage Capacity: 2MB (2HD), 1MB (2DD); 1.6MB (certain model variations)
• Data Transfer Rate: 500 kbits/sec (High Density), 250 kbits/sec (Normal Density)
• Access Time: 94ms average; 3ms track-to-track
• Motor Spindle Speed: 300 RPM
• Track Density: 135 TPI across 80 cylinders
• Motor Start Time: 480ms maximum
• Recording Method: FM or MFM
• Reliability: MTBF >30,000 hours; soft read error <10⁻⁹ bit, hard read error <10⁻¹² bit, seek error <10⁻⁶ bit
• Power Supply: +5V DC (4.5V–5.5V operating range)
• Power Draw: 1.4W typical (operating), 15mW (standby)
• Dimensions: 101.6mm W × 25.4mm H × 146mm D
• Weight: 350 grams
– Key Features
• Single +5V supply with low standby power consumption
• Selectable straps and jumpers for Drive Select (DS0/DS1), Disk Change signal routing (pin 34 or 2), automatic density detection, auto-recalibration, and auto-chucking control
• 34-pin right-angle header connector (standard PC floppy interface)
• 4-pin Molex-style power connector
• Green LED activity indicator
• Front bezel options: black, beige (PC/AT), beige (PS/2)
– Typical Applications
Legacy system integration, industrial embedded systems, archival data recovery, and compatibility with systems requiring native 3.5-inch floppy disk I/O.
– Compatibility & Integration
The FD-235HF interfaces via standard 34-pin PC floppy connector. Configurable jumpers enable multi-drive daisy-chain operation and adaptation to various host system requirements, including auto-density sensing based on disk type or HD hole sensor detection.
