參數(shù)資料
型號(hào)： VSC7177
廠商： Maxim Integrated Products, Inc.
英文描述： Enhanced 2:1 Port Selector for Serial ATA and Serial Attached SCSI
中文描述： 增強(qiáng)型2:1端口選擇器，用于串行ATA和串行連接SCSI
文件頁(yè)數(shù)： 13/24頁(yè)
文件大小： 253K
代理商： VSC7177
13 of 24
Revision 4.2
July 29, 2005
Confidential
VSC7177
Data Sheet
D
ESIGN
G
UIDELINES
Pinout Differences Between VSC7177 and VSC7173/VSC7175
The VSC7177 device is an upgrade to the VSC7173 and the VSC7175 devices. The VSC7177 package is the same as
the VSC7173 and the VSC7175; however, there are two pin requirement changes to be aware of when using a
VSC7177 device on a board designed for the VSC7173 or the VSC7175.
●
Pin 25 (VDDN) in the VSC7177 is an internally-generated 1.8 V supply voltage. This pin must be connected
to a capacitor as described in
“Voltage Regulator,”
page 12. Pin 25 (Reserved) is not used in the VSC7173 or
in the VSC7175.
Pin 18 (PORTSEL1) and pin 21 (MODE1) in the VSC7177 must both be set LOW to enable level-sensitive
sideband mode. Setting PORTSEL1 HIGH enables the protocol-based port selection mode listed in
Table 1,
page 5. In the VSC7173 and the VSC7175, setting only pin 21 (MODE1) to LOW is required to enable
level-sensitive sideband mode. Pin 18 (HSTSELB) in the VSC7173 and the VSC7175 is not used in the this
mode and is a “don’t care” (connect to any value). The logical value of PORTSEL0/HSTSELA (pin 19 in the
VSC7177, the VSC7173, and the VSC7175) selects the connected port in level-sensitive mode.
Pin 9 in the VSC7175 (OOBDTA) reports the OOB status for Host A. For the VSC7177 device, pin 9
(OOBPORT0) reports the OOB status for the unselected host port.
●
●
Table 8
provides a summary of the pinout differences.
Sideband Loopback Function
A sideband loopback feature has been added to the VSC7177 in sideband mode. Consequently, the VSC7177 has
different functionality than either the VSC7173 or the VSC7175 in this mode. Port 2 can be connected to port 0 or
port 1 in sideband mode. The data transmitted from the output driver of the unconnected port can be data from port 2
(the downstream device) or data from the unconnected port’s input receiver (loopback data). The data transmitted is
selected with the MODE0 input. The ability to loopback the data from the unconnected port is a new feature for
sideband mode. Both the VSC7173 and the VSC7175 transmit the downstream device data or a common-mode signal
from the unconnected port’s output driver. The VSC7177 cannot directly force transmission of common mode from
the unconnected port. Transmission of common mode is achieved indirectly by enabling the loopback mode and
having the host send a common mode signal to the VSC7177.
Table 8. VSC7177 and VSC7173/VSC7175 Pinout Differences
Pin
Number
Operating Mode
Pin Function / Connectivity
VSC7173
VSC7175
VSC7177
18
Level-sensitive
sideband mode
X (don’t care)
X (don’t care)
VSS (ground)
25
All modes
Not used
Not used
Connect to external capacitor
9
All modes
OOB status for Port 0
OOB status for Host A
OOB status for unselected host port
相關(guān)PDF資料
PDF描述
VSC7186 Quad Transceiver for Gigabit Ethernet
VSC7212 Gigabit Interconnect Chip
VSC7212RG Gigabit Interconnect Chip
VSC7216-01 Multi-Gigabit Interconnect Chip
VSC7216-02 740; 38000/740 Series; Microcontroller; Bit Size: 8-bit; ROM: 60K; RAM: 2048; ROM Type: Mask ROM; CPU: 740 core; Minimum Instruction Execution Time (ns): 240 (@16.8MHz); Operating Frequency / Supply Voltage: 1.8 to 5.5V; Operating Ambient Temperature (°C): -20 to 85; Package Code: PLQP0064GA-A (64P6U-A)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VSC7177XYI 制造商:Maxim Integrated Products 功能描述:ENHANCED 2:1 PORT SELECTOR FOR SERIAL ATA AND SERIAL ATTACHE - Rail/Tube
VSC7177YI 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
VSC7182 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Quad Transceiver for Gigabit Ethernet and Fibre Channel
VSC7182TW 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Quad Transceiver for Gigabit Ethernet and Fibre Channel
VSC7186 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Quad Transceiver for Gigabit Ethernet
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*