Datasheet > PS323CUA

PS323CUA

更新时间： 2024-02-16 05:08:33

品牌	Logo	应用领域
百利通 - PERICOM		光电二极管输出元件
页数	文件大小	规格书
12页	255K
描述
SPST, 2 Func, 1 Channel, CMOS, PDSO8, MSOP-8

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

PS323CUA 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	MSOP	包装说明：	TSSOP, TSSOP8,.19
针数：	8	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.28	其他特性：	ALSO OPERATES AT 5V VCC
模拟集成电路 - 其他类型：	SPST	JESD-30 代码：	S-PDSO-G8
JESD-609代码：	e0	长度：	3 mm
正常位置：	NO	信道数量：	1
功能数量：	2	端子数量：	8
标称断态隔离度：	72 dB	最大通态电阻 (Ron)：	70 Ω
最高工作温度：	70 °C	最低工作温度：
输出：	SEPARATE OUTPUT	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装等效代码：	TSSOP8,.19
封装形状：	SQUARE	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	3.3/5 V
认证状态：	Not Qualified	座面最大高度：	1.1 mm
子类别：	Multiplexer or Switches	最大供电电压 (Vsup)：	16 V
最小供电电压 (Vsup)：	2.7 V	标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES	最长断开时间：	75 ns
最长接通时间：	125 ns	切换：	BREAK-BEFORE-MAKE
技术：	CMOS	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	3 mm
Base Number Matches：	1

PS323CUA 数据手册

PS323

Precision, Single Supply SPST Analog Switch

Application Information

Power-Supply Considerations

The PS323 dual analog switch precisely switches inputs with a

single 2.7V to 12V supply, low On-Resistance (30-ohm) and high

speed operation (tON = 85ns, tOFF = 25ns). The devices are suited

to portable battery powered equipment due to a low supply voltage

(2.7V), low power consumption (5mW), and low leakage currents

(0.1nA). High frequency applications benefit from the high

bandwidth, high off isolation, and low crosstalk.

The PS323 construction is typical of most CMOS analog switches,

except that they have voltage supply pins: V+ and GND. These

pins power the internal CMOS switches and set the analog voltage

limits. Unlike switches with a 12V maximum supply voltage, the

PS323 is made from a 17V-supply voltage technology that provides

room for 10-20% tolerance on 12V supplies. This technology gives

room for overshoot and noise spikes. While the minimum

recommended supply voltage is 2.7V, it is important to note that

the input signal-range, switching times, and on-resistance degrade

at lower supply voltages. Refer to the electrical specifications for

details. V+ and GND also power the internal logic drivers (turn the

switch on & off). These switches can be operated with bipolar

supplies if the voltage range from V- (at the GND pin) to V+ does

not exceed a total of 12V.

Proper Power Supply Sequencing & Over-voltage

Protection

With any CMOS device, proper power supply sequencing is needed

to protect the device from excessive input currents, which may

permanently damage the IC. All I/O pins contain ESD protection

diodes from the pin to V+ and to GND (see Figure 9 below).

To prevent forward biasing of these diodes, V+ must be applied

before any input signals, and input signals must swing between

V+ and GND. If these conditions cannot be guaranteed, then one

of two suggested protection methods must be employed. Protect

the logic inputs by adding a 1k-ohm resistor in series with the

input (see Figure 9). The resistor limits the currents below the

threshold that can cause permanent damage to sub-micro Amp

levels. This reduced input current produces an insignificant voltage

drop during normal operation.Aseries resistor is not desirable, but

small-signal diodes can be added in series with the supply pins to

provide over-voltage protection for the IC. The diodes limit the

analog signal from 1V below V+ to 1V above GND. The leakage

current will remain low, but the switch resistance may increase at low

supply voltages.

Logic-Level Thresholds

The switch logic is TTL compatible (0.8V & 2.4V) over a supply

range of 3V to 11V.At 12Vthe VIH level is about 2.5V. This is below

the TTL guaranteed high output minimum level of 2.8V, but noise

margin is reduced. For best results with a 12V supply, use logic

drive that provides a VOH greater than 3V. The digital input stages

draw supply current whenever the digital input voltage is not at

one of the supply rails. Driving the digital input signals from GND

to V+ with a fast transition time minimizes power dissipation.

High-Frequency Signal Passing/Isolation

In 50-ohm systems, signal response is flat even past 300MHz.

An OFF switch is like a capacitor and passes high frequencies

with low attenuation, resulting in signal passing from the switch

input to output. OFF Isolation is the resistance to passing signals

while the switch is OFF, while Crosstalk indicates the amount of

signal noise that crosses over from one switch to another. The

OFF Isolation is about 50dB in 50-ohm systems. Larger load

impedances reduce Off Isolation and Crosstalk due to the voltage

divider action of the switch OFF impedance and the load.

Positive Supply

V+

Leakage Current

Reverse ESD protection diodes are internally connected between

each analog-signal pin and both V+ and GND. One of these diodes

conducts if any analog signal exceeds V+ or GND.

COM

Most of the analog leakage current comes from the ESD diodes to

V+ or GND. Although the ESD diodes on a given signal pin are

identical and therefore fairly well balanced, they are reverse biased

differently. Either V+ or GND and the analog signal bias each

diode. Hence, leakage currents will vary as the signal varies. The

difference in the diode leakage currents to the V+ and GND pins

creates the analog signal-path leakage current. Also, analog leakage

currents flow between each pin and one of the supply terminals,

not to the other switch terminal. This is why both sides of a given

switch can show leakage currents of the same or opposite polarity. There

is no connection between the analog-signal paths and V+ or GND.

V-

Figure 1. Overvoltage Protection

PS8188F

03/10/05

1 2 3 456 7 8...12

中文翻译

下载PDF

与PS323CUA相关器件

型号	品牌	获取价格	描述	数据表
PS323CUAE	PERICOM	获取价格	SPST, 2 Func, 1 Channel, CMOS, PDSO8, LEAD FREE, MSOP-8
PS323CUAEX	PERICOM	获取价格	SPST, 2 Func, 1 Channel, PDSO8, MSOP-8
PS323CUAX	PERICOM	获取价格	Precision, Single-Supply SPST Analog Switches
PS323EPA	PERICOM	获取价格	Precision, Single-Supply SPST Analog Switches
PS323EPAE	PERICOM	获取价格	SPST, 2 Func, 1 Channel, CMOS, PDIP8, PLASTIC, DIP-8
PS323ESA	PERICOM	获取价格	Precision, Single-Supply SPST Analog Switches
PS323ESAE	PERICOM	获取价格	SPST, 2 Func, 1 Channel, CMOS, PDSO8, LEAD FREE, SO-8
PS323ESAE	DIODES	获取价格	SPST, 2 Func, CMOS, PDSO8
PS323ESAEX	PERICOM	获取价格	SPST, 2 Func, 1 Channel, PDSO8, 0.150 INCH, SOIC-8
PS323EUA	PERICOM	获取价格	SPST, 2 Func, 1 Channel, CMOS, PDSO8, MSOP-8

产品中心

服务支持

精选活动

关于我们

帮助中心

PS323CUA

PS323CUA 技术参数

PS323CUA 数据手册

与PS323CUA相关器件

与PS323CUA相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

PS323CUA

PS323CUA 技术参数

PS323CUA 数据手册

与PS323CUA相关器件

与PS323CUA相关文章

您还可以找

您在本页遇到什么问题？