G219 Datasheet, PDF (8/9 Pages) List of Unclassifed Manufacturers – Ultra320 Multi-mode LVD/SE SCSI Terminator

Global Mixed-mode Technology Inc.
Pin Description
G219
PIN
SYMBOL
DESCRIPTION
1
VREF ^{Reference Voltage. 2.85-volt reference in SE mode and 1.25V in LVD mode; must be connected to a}
4.7µF capacitor.
Signal Termination. (X=1,2,3,…..9)
2-5,7-12,
Rx+: Ground line for single-ended or positive line for differential applications for the SCSI bus.
Rx+, Rx-
18-21, 23-26
Rx-: Signal line/active line for single-ended or negative line in differential applications for the SCSI
bus.
6,22 NC/ HS GND No Connect/Heat Sink Ground. Should be grounded for heat sinking purpose
13
DISCNCT Disconnect. When pulled high, the G219 isolates its bus pins (Rx+, Rx-) from the SCSI bus.
14
GND Ground. Terminator ground pin. Connected to ground.
Master/slave. Used to select which terminator is the controlling device. M/S pin high enables the
15
M/S
DIFFSENSE driver.
16
DIFFSENSE Output to drive the SCSI bus DIFFSENS line.
DIFFB pin should be connected to a 0.1µF capacitor to GND and 20k resistor to SCSI/Bus
17
DIFFB DIFFSENS line. An input pin to detect the type of device (differential or single-ended) on the SCSI
bus.
27,28
TPWR Terminator Power. Connect to the SCSI TERMPWR line and de-couple with a 2.2µF capacitor.
Ver 1.2
Feb 08, 2002
TEL: [phone]
http://www.gmt.com.tw
8