参数资料
型号: FSA321UMX
厂商: Fairchild Semiconductor
文件页数: 5/12页
文件大小: 0K
描述: IC SWITCH MULTIMEDIA 10-UMLP
标准包装: 5,000
功能: 音频,USB 开关
电路: 1 x DPDT
导通状态电阻: 11 欧姆(USB),2.7 欧姆(音频)
电压电源: 单电源
电压 - 电源,单路/双路(±): 1.8 V ~ 4.3 V
电流 - 电源: 500µA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-UFQFN
供应商设备封装: 10-uMLP(1.4x1.8)
包装: 带卷 (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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