Sycard produces three types of CF-to-CF Card adapters:
The CF extend 160A has test points, current measurement jumpers and power indicators to debug a CompactFlash card or host. The CF extend 162/162E only extends the card.
The CFextend 162E has an ejector mechanism to facilitate the ejection of a CompactFlash card. The CF extend 162 does not have an ejector. If your application requires frequent insertion/removal of a CF card, we recommend the CFextend 162E.
The original CompactFlash Specification was designed to support only Type I (3.3mm thick) mass storage cards. The CF+ Specification expands the original CF Specification by adding a Type II (5.0mm) thick card and adding I/O support.
Type I CF card is 3.3mm thick. A Type II card is 5.0mm thick. Most flash card (Sandisk, Lexar, Delkin etc.) are Type I. The IBM Microdrive is Type II.
This is the most common question we receive about the CF extend 162/162E. Although the adapter will allow the IBM Microdrive to be plugged into a Type I (3.3mm thick) CompactFlash™ socket, there are many situations that may prevent the IBM Microdrive from working including:
Sycard Technology cannot provide these answers. Contact the PDA or digital camera manufacturer for more information.
The following table shows the typical current consumption of the IBM
Microdrive to the flash memory based CF cards:
As you can see from this table, the IBM Microdrive draws considerably more power than the SanDisk Flash Memory Card. In Idle mode (drive spinning), the 1G Microdrive draws 750 times the power as the flash card. In active mode (Reading), the 1G Microdrive draws over 3 times the power.
Yes! A Type I CompactFlash card can only draw 70mA @ 3.3V. A CF+ Type II card can draw up to 500mA. If your CompactFlash™ host socket does not have overcurrent protection, plugging in a high power CF+ card may cause damage.
Yes, if your device has a Type I slot, then it only expects a card that draws up to 70mA. An IBM Microdrive can draw up to 400mA. You can damage your Microdrive and camera (or PDA) if your CompactFlash™ host socket does not have overcurrent protection.
No, the CFextend 162/162E has no capability to connect an external power supply. Doing so may damage your CompactFlash host and/or card.
No, the CFextend 162/162E are passive extenders.
No. The CF extend CF-to-CF Card adapters are sold as development tools for manufacturers developing or manufacturing CompactFlash cards, hosts and software. Purchasers should understand that this is a manufacturing test tool and is not designed for consumer use. Sycard Technology only guarantees that the CF extend CF-to CF extenders are free from manufacturing defects and meets its published specifications.
Sycard Technology can provide a schematic for CF extend CF-to-CF extenders. Technical documentation on the CompactFlash Standard and IBM Microdrive can be obtained from the links below. Sycard Technology does not provide design or consulting services.