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參數(shù)資料
| 型號： | MAX4855ETE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MULTIPLEXER DUAL SPDT 16TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 功能： | 多路復(fù)用器 |
| 電路： | 2 x SPDT |
| 導(dǎo)通狀態(tài)電阻： | 7.5 歐姆 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 2 V ~ 5.5 V |
| 電流 - 電源： | 1µA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
MAX4855
Detailed Description
The MAX4855 dual SPDT, low on-resistance, low-voltage,
analog switch operates from a +2V to +5.5V supply and
can handle signals up to the power rails. In addition, the
MAX4855 integrates two internal comparators that can
be used for headphone or mute detection. The compara-
tor threshold is internally generated to be approximately
1/3 of VCC.
Applications Information
Digital Control Inputs
The logic inputs (IN_) accept up to +5.5V even if the
supply voltages are below this level. For example, with
a +3.3V VCC supply, IN_ can be driven low to GND and
high to +5.5V allowing for mixing of logic levels in a
system. Driving IN_ rail-to-rail minimizes power con-
sumption. For a +2V supply voltage, the logic thresholds
are 0.5V (low) and 1.4V (high); for a +5V supply voltage,
the logic thresholds are 0.8V (low) and 1.8V (high).
Analog Signal Levels
The on-resistance of these switches changes very little
for analog input signals across the entire supply voltage
range (see the Typical Operating Characteristics). The
switches are bidirectional, so the NO_, NC_, and COM_
pins can be either inputs or outputs.
Comparator
The positive terminal of the comparator is internally set to
VCC/3. When the negative terminal (CIN_) is below the
threshold (VCC/3), the comparator output (COUT_) is
high. When CIN_ rises above VCC/3, COUT_ is low.
The comparator threshold allows for detection of head-
phones since headphone audio signals are typically
biased to VCC/2.
Power-Supply Sequencing
Caution: Do not exceed the absolute maximum rat-
ings because stresses beyond the listed ratings
may cause permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply VCC before applying
analog signals, especially if the analog signal is not
current-limited.
0.75
, Dual SPDT Audio Switch with
Integrated Comparators
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1, 8
N.C.
No Connection. Not internally connected.
2
CIN1
Inverting Input for Comparator 1
3
CIN2
Inverting Input for Comparator 2
4
COM1
Common Terminal for Analog Switch 1
5
NO1
Normally Open Terminal for Analog Switch 1
6
GND
Ground
7
NC2
Normally Closed Terminal for Analog Switch 2
9
IN2
Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic
HIGH connects COM2 to NO2.
10
COM2
Common Terminal for Analog Switch 2
11
COUT1
Output for Comparator 1
12
NO2
Normally Open Terminal for Analog Switch 2
13
COUT2
Output for Comparator 2
14
VCC
Supply Voltage. Bypass to GND with a 0.01F capacitor as close to the pin as possible.
15
IN1
Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic
HIGH connects COM1 to NO1.
16
NC1
Normally Closed Terminal for Analog Switch 1
EP
—
Exposed Paddle. Connect to PC board ground plane.
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