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參數(shù)資料
| 型號： | PS395CWG |
| 英文描述： | ANALOG SWITCH|OCTAL|SPST|CMOS|SOP|24PIN|PLASTIC |
| 中文描述： | 模擬開關(guān)|八路|聚苯乙烯|的CMOS |專科| 24針|塑料 |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 363K |
| 代理商： | PS395CWG |
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PS8463C 03/07/01
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PS395A
Low On-Resistance 8-Channel 17V,
CS
DIN
SCLK
CS1
CS2
CS3
SCLK
SCLK
SCLK
DIN
DIN
DIN
To
Other
Serial
Devices
CS
CS
Figure 5. Addressable Serial Interface
FOUR CLOCK
PULSES
SW4
DIN
SCLK
SW0
D4
D0
Figure 6. Differential Multiplexer Input Control
Power-Supply Considerations
Overview
The PS395A construction is typical of most CMOS analog
switches. It has three supply pins: V+, V-, and GND. V+ and V- are
used to drive the internal CMOS switches and to set the limits of
the analog voltage on any switch. Reverse ESD-protection diodes
are internally connected between each analog signal pin and both
V+ and V-. If any analog signal exceeds V+ or V-, one of these
diodes will conduct. During normal operation, these (and other)
reverse-biased ESD diodes leak, forming the only current drawn
from V+ or V-.
Virtually all the analog leakage current is through the ESD diodes.
Although the ESD diodes on a given signal pin are identical, and
therefore fairly well balanced, they are reverse biased differently.
Each is biased by either V+ or V- and the analog signal. This means
their leakages vary as the signal varies. The difference in the two
diode leakages to the V+ and V- pins constitutes the analog sig-
nal-path leakage current. All analog leakage current flows to the
supply terminals, not to the other switch terminal. This is why
both sides of a given switch can show leakage currents of either
the same or opposite polarity.
There is no connection between the analog signal paths and GND.
V+ and GND power the internal logic and logic-level translators,
and set both the input and output logic limits. The logic-level
translators convert the logic levels to switched V+ and V- signals
to drive the analog signal gates. This drive signal is the only con-
nection between logic supplies (and signals) and the analog sup-
plies. V+, and V- have ESD-protection diodes to GND. The logic-
level inputs and output have ESD protection to V+ and to GND.
The logic-level thresholds are CMOS and TTL compatible when
V+ is +5V. As V+ is raised, the threshold increases slightly. So
when V+ reaches +12V, the threshold is about 3.1V; slightly above
the TTL guaranteed high-level minimum of 2.8V, but still compat-
ible with CMOS outputs.
Bipolar Supplies
The PS395A operates with bipolar supplies between ±3.0V and
±8V. The V+ and V- supplies need not be symmetrical, but their
sum cannot exceed the absolute maximum rating of 17V.
Do not connect the PS395A V+ to +3V and connect the logic-level
pins to TTL logic-level signals. This exceeds the absolute maxi-
mum ratings and can damage the part and/or external circuits.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PS395ENG | ANALOG SWITCH|OCTAL|SPST|CMOS|DIP|24PIN|PLASTIC |
| PS395EWG | ANALOG SWITCH|OCTAL|SPST|CMOS|SOP|24PIN|PLASTIC |
| PS396CPI | 16-Channel Analog Multiplexer |
| PS396EPI | 16-Channel Analog Multiplexer |
| PS396EWI | ANALOG MUX|SINGLE|16-CHANNEL|CMOS|SO|28PIN|PLASTIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PS395ENG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ANALOG SWITCH|OCTAL|SPST|CMOS|DIP|24PIN|PLASTIC |
| PS395EWG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ANALOG SWITCH|OCTAL|SPST|CMOS|SOP|24PIN|PLASTIC |
| PS396 | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:Precision, 16-Channel 17V Analog Multiplexer |
| PS396CAI | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:Precision, 16-Channel 17V Analog Multiplexer |
| PS396CAIE | 功能描述:多路器開關(guān) IC Precision 16Ch Dual 8Ch 17V RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關(guān)閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16 |
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