參數(shù)資料
型號(hào): FSA321UMX
廠商: Fairchild Semiconductor
文件頁(yè)數(shù): 5/12頁(yè)
文件大?。?/td> 0K
描述: IC SWITCH MULTIMEDIA 10-UMLP
標(biāo)準(zhǔn)包裝: 5,000
功能: 音頻,USB 開(kāi)關(guān)
電路: 1 x DPDT
導(dǎo)通狀態(tài)電阻: 11 歐姆(USB),2.7 歐姆(音頻)
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 1.8 V ~ 4.3 V
電流 - 電源: 500µA
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 10-UFQFN
供應(yīng)商設(shè)備封裝: 10-uMLP(1.4x1.8)
包裝: 帶卷 (TR)
2007 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA321
Rev.1.0.6
2
FS
A3
2
1
US
B2
.0
Hi
-Spe
ed
and
Aud
io
Swi
tches
wi
th
Ne
gative
Signal
Ca
pab
il
it
y
Pin Configuration
VCC
GND
1
8
5
4
3
2
D +
D -
R
L
D +/R
D -/L
A/LP Sel
USB Sel
9
10
6
7
Figure 2. UMLP
Pin Definitions
Pin #
Name
Description
9
VCC
Power supply
5
A/LP Sel
Audio Select Override and Power-Save Mode. This pin can be used to override USB Sel for
applications where analog audio is transmitted on the USB D+, D- lines. This same select pin is
used to put the FSA321 in low-power mode when USB Sel is LOW, not transmitting audio signals
or USB data. The FSA321 has a weak internal pull-down, setting its default state to LOW and
allowing this pin to float when not in use.
8
USB Sel
USB Path select pin. Can be connected to USB connector VBUS pin for automatic USB detection.
10, 1
D+, D-
USB data bus input sources
2, 3
R, L
Audio right and left input sources
7, 6
D+/R, D-/L USB and audio common connector ports
Truth Table
VCC
USB Sel
A/LP Sel
Audio Mode
USB Mode
Remarks
LOW
OFF
Disabled Inputs High-Z
LOW
OFF
ON
USB Communication
ON
OFF
Audio Override on USB
LOW
OFF
Low Power Mode
LOW
ON
OFF
Audio Out
Notes:
1.
Forcing USB Sel HIGH when VBUS is present allows for automatic USB detection.
2.
HIGH is the threshold as defined to meet USB2.0 VCC requirements and audio supply threshold in a system
(see DC Tables).
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