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參數(shù)資料
| 型號(hào)： | G218B |
| 英文描述： | Multi-mode SCSI terminator (Ultra 2 / Ultra 160).|Terminator Series |
| 中文描述： | 多模式的SCSI終結(jié)器（超2 /超160）。|終結(jié)者系列 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 231K |
| 代理商： | G218B |
Ver 1.3
Jul 19, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
8
G218B
Global Mixed-mode Technology Inc.
Pin Description
(for 28pin SSOP/TSSOP)
PIN
1
SYMBOL
VREF*
DESCRIPTION
Reference Voltage.
2.85-volt reference; must be connected to a 4.7μF capacitor.
Signal Termination.
(X=1,2,3,…..9)
Rx+: Ground line for single-ended or positive line for differential applications for the SCSI bus.
Rx-: Signal line/active line for single-ended or negative line in differential applications for the SCSI
bus.
NC/ HS GND
No Connect/ HS GND.
Should be grounded for heat sinking purpose.
DISCNCT
Disconnec
t. When pulled high, the G218B isolates its bus pins (Rx+, Rx-) from the SCSI bus.
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
DIFFSENSE driver.
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
DIFFSENS line. An input pin to detect the type of device (differential or single-ended) on the SCSI
bus.
TPWR
Terminator Power.
Connect to the SCSI TERMPWR line and de-couple with a 2.2μF capacitor.
2-5,7-12,
18-21, 23-26
Rx+, Rx-
6,22
13
14
15
M/S
16
17
DIFFB
27,28
*The VREF keeps the level at 2.85 volt, despite the DISCNCT pin is asserted or not; even the termination mode is changed.
(36pin SSOP)
PIN
1
2,3
SYMBOL
VREF*
NC
DESCRIPTION
Reference Voltage.
2.85-volt reference; must be connected to a 4.7μF capacitor.
No Connect.
Do not connect these pins.
Signal Termination.
(X=1,2,3,…..9)
Rx+: Ground line for single-ended or positive line for differential applications for the SCSI bus.
Rx-: Signal line/active line for single-ended or negative line in differential applications for the SCSI bus.
Heat Sink Ground.
Connect to large area PC board traces to increase power dissipation capabil-
ity.
Disconnec
t. When pulled high, the G218 isolates its bus pins (Rx+, Rx-) from the SCSI bus.
Ground.
Terminator ground pin. Connected to ground.
Master/slave.
Used to select which terminator is the controlling device. M/S pin high enables the
DIFFSENSE driver.
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
DIFFSENS line. An input pin to detect the type of device (differential or single-ended) on the SCSI
bus.
SE
Single ended mode indicator.
It is HIGH when terminator is operating in SE mode.
LVD
Low Voltage Differential mode indicator.
It is HIGH when terminator is operating in LVD mode.
HVD
High Voltage Differential mode indicator.
It is HIGH when terminator is operating in HVD mode
TPWR
Terminator Power.
Connect to SCSI bus TERMPWR line and decouple with 2.2μF capacitor.
4-7,11-16,
22-25,
29-32
8, 9,10,26,
27,28
17
18
Rx+
Rx-
HS/GND
DISCNCT
GND
19
M/S
20
21
DIFFB
33
34
35
36
*The VREF keeps the level at 2.85 volt, despite the DISCNCT pin is asserted or not; even the termination mode is changed.
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| G218BR-D3 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Ultra160 Multi-mode LVD/SE SCSI Terminator |
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| G218BR-S4F | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Ultra160 Multi-mode LVD/SE SCSI Terminator |
| G218BR-S5 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Ultra160 Multi-mode LVD/SE SCSI Terminator |
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