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USER'S
USER'S
MANUAL
MANUAL
Technical Specifications
The Microtech USB XpressSCSI - USB to SCSI adapter is an intelligent cable that complies with the
Universal Serial Bus Specification version 1.1. The Adapter comprises an intelligent 4 wire shielded USB High
Speed cable with a USB Series A Connector molded into an embedded circuit board which has a SCSI
Connector as output.. There are two varieties of the product. The USB-SCSI-HD50 has a 50 pin Micro-D
SCSI-2 type connector while the USB-SCSI-DB25 uses a 25 pin D-Type output . The circuit board internal to
the cable contains the EUSB chipset comprising the EUSB-01 which is a USB Serial Interface Engine and
Microcontroller, the EUSB-S1 which is the SCSI Interface, and a 512Kb Prom which stores the
Microcontroller firmware. The device is recognized by the host as a self-powered device receiving its +5v
power from the Terminator Power line of the attached SCSI device.
USB
Complies with USB V1.1 Specifications.
UHCI and OHCI host implementations supported.
Certified by the USB Implementers Forum for Windows 98.
Control, Bulk, Isochronous and Interrupt transfers supported.
Suspend-Resume not currently supported.
Electrical
Power dissipation 1.25 watts typical (250mA@5v).
Self powered device (power is taken from the attached device not the Bus)
DC Supply voltage +5vdc + / - 10%. Ripple Voltage 100mV p-p (1-2 MHz).
Temperature
Operating:
0 C to 70 C
Storage:
40 C to +125 C
Physical
Dimensions 100mm (connector to base of cable) x 65mm (at widest point) x
18mm max depth. + / - 3% Tolerance. Refer to diagram in section 1-Overview.
Weight 110 grams
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