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參數(shù)資料
| 型號(hào)： | LV4904V-TLM-E |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO CLASS D 44-SSOP |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 類型： | D 類 |
| 輸出類型： | 2 通道（立體聲） |
| 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： | 15W x 2 @ 8 歐姆 |
| 電源電壓： | 8 V ~ 20 V |
| 特點(diǎn)： | I²C，I²S，靜音，短路保護(hù)和熱保護(hù)，待機(jī) |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 44-SSOPJ |
| 封裝/外殼： | 44-LSSOP（0.220"，5.60mm 寬）裸露焊盤 |
| 包裝： | 帶卷 (TR) |
Micrel Inc.
MIC4555
September 2011
12
M9999-092311-B
Functional Description
EN
The EN pin is the enable input from the controller. A
logic high signal enables the level shifters and the VCC
output. A logic low signal disables the level shifters and
the LDO and a low current shutdown mode is activated.
VSEL
VSEL selects the level shifted voltage for the SIM Card. A
high logic voltage on VSEL selects the level shifter to 3V.
A low logic voltage on VSEL selects the level shifter to
1.8V. Do not leave floating.
DVCC
The DVCC is the supply voltage for the controller side
input and output pins (CIN, RIN, DATA). The operating
range is from 1.6V to VBAT. A minimum 1F input
capacitor with a minimum voltage rating of 6.3V placed
close to DVCC and ground (GND) is required. Refer to the
Layout Recommendations
for details.
VBAT
The VBAT is the input power supply to the LDO. The
operating range is from 2.7V to 5.5V. A minimum 1F
input capacitor with a minimum voltage rating of 6.3V to
ground (GND) is required. Refer to the Layout
Recommendations
for details.
VCC
The VCC is the output of the LDO and provides power to
the SIM card. A minimum 1F input capacitor with a
minimum voltage rating of 6.3V to ground (GND) is
required. Refer to the Layout Recommendations for
details.
GND
The ground pin (GND) is the ground path for the biasing,
the control circuitry and the power ground. The current
loop for the ground should be kept as short as possible.
Refer to the Layout Recommendations for more details.
RIN, RST
RIN is the digital reset input for the SIM Card and
translates to RST through the digital level shifter. It is
one directional. If VSEL is low, then the input at RIN will
be level shifted to 1.8V at the RST output. If VSEL is high,
then the input at RST will be level shifted to 3V at the
RST output.
CIN, CLK
CIN is the digital input clock for SIM card. The CIN
translates to CLK and is one directional. If VSEL is low,
then the input at CLKIN will be level shifted to 1.8V at
the CLK output. If VSEL is high, then the input at CIN will
be level shifted to 3V at the CLK output.
DATA, I/O
DATA is the digital data for the SIM card. The DATA
translate to I/O through the digital level shifter and is
bidirectional using internal pull ups. If VSEL is low, then
the level shifted output is 1.8V at the I/O output. If VSEL is
high, then the level shifted output is 3V at the I/O output.
Since DATA and I/O are bidirectional, the input at I/O is
level shifted to equal the DVCC voltage at the DATA
output.
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