Datasheet > LM239J

LM239J

更新时间： 2024-01-01 11:28:00

品牌	Logo	应用领域
罗彻斯特 - ROCHESTER		放大器
页数	文件大小	规格书
20页	1119K
描述
QUAD COMPARATOR, 9000uV OFFSET-MAX, 1300ns RESPONSE TIME, CDIP14, CERDIP-14

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

LM239J 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
Reach Compliance Code：	unknown	风险等级：	5.88
放大器类型：	COMPARATOR	最大输入失调电压：	9000 µV
JESD-30 代码：	R-XDIP-T14	JESD-609代码：	e0
功能数量：	4	端子数量：	14
最高工作温度：	85 °C	最低工作温度：	-25 °C
封装主体材料：	CERAMIC	封装代码：	DIP
封装等效代码：	DIP14,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	电源：	5 V
认证状态：	Not Qualified	标称响应时间：	1300 ns
子类别：	Comparators	最大压摆率：	2 mA
标称供电电压 (Vsup)：	5 V	表面贴装：	NO
技术：	BIPOLAR	温度等级：	OTHER
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL

LM239J 数据手册

Application Hints

Driving CMOS

The LM139 series are high gain, wide bandwidth devices

which, like most comparators, can easily oscillate if the

output lead is inadvertently allowed to capacitively couple to

the inputs via stray capacitance. This shows up only during

the output voltage transition intervals as the comparator

changes states. Power supply bypassing is not required to

solve this problem. Standard PC board layout is helpful as it

reduces stray input-output coupling. Reducing this input re-

sistors to

10 kΩ reduces the feedback signal levels and

finally, adding even a small amount (1 to 10 mV) of positive

feedback (hysteresis) causes such a rapid transition that

oscillations due to stray feedback are not possible. Simply

socketing the IC and attaching resistors to the pins will cause

input-output oscillations during the small transition intervals

unless hysteresis is used. If the input signal is a pulse

waveform, with relatively fast rise and fall times, hysteresis is

not required.

00570604

Driving TTL

All pins of any unused comparators should be tied to the

negative supply.

The bias network of the LM139 series establishes a drain

current which is independent of the magnitude of the power

supply voltage over the range of from 2 V_DCto 30 V_DC

It is usually unnecessary to use a bypass capacitor across

the power supply line.

00570605

The differential input voltage may be larger than V⁺without

damaging the device. Protection should be provided to pre-

vent the input voltages from going negative more than −0.3

V_DC(at 25˚C). An input clamp diode can be used as shown

in the applications section.

AND Gate

The output of the LM139 series is the uncommitted collector

of a grounded-emitter NPN output transistor. Many collectors

can be tied together to provide an output OR’ing function. An

output pull-up resistor can be connected to any available

power supply voltage within the permitted supply voltage

range and there is no restriction on this voltage due to the

magnitude of the voltage which is applied to the V⁺terminal

of the LM139A package. The output can also be used as a

simple SPST switch to ground (when a pull-up resistor is not

used). The amount of current which the output device can

sink is limited by the drive available (which is independent of

V⁺) and the β of this device. When the maximum current limit

is reached (approximately 16 mA), the output transistor will

come out of saturation and the output voltage will rise very

rapidly. The output saturation voltage is limited by the ap-

proximately 60Ω R_SATof the output transistor. The low offset

voltage of the output transistor (1 mV) allows the output to

clamp essentially to ground level for small load currents.

00570608

OR Gate

Typical Applications (V⁺= 5.0 V_DC

)

Basic Comparator

00570603

00570609

www.national.com

1...5 6 789 10 11...20

中文翻译

下载PDF

与LM239J相关器件

型号	品牌	获取价格	描述	数据表
LM239JD	NXP	获取价格	暂无描述
LM239JDS	MOTOROLA	获取价格	Comparator, 4 Func, 9000uV Offset-Max, 1300ns Response Time, BIPolar, CDIP14,
LM239J-N	TI	获取价格	IC,VOLT COMPARATOR,QUAD,BIPOLAR,DIP,14PIN,CERAMIC
LM239JS	MOTOROLA	获取价格	IC,VOLT COMPARATOR,QUAD,BIPOLAR,DIP,14PIN,CERAMIC
LM239M	FAIRCHILD	获取价格	Quad Comparator
LM239MX	FAIRCHILD	获取价格	Quad Comparator
LM239N	MOTOROLA	获取价格	Quad Single Supply Comparators
LM239N	NXP	获取价格	Quad voltage comparator
LM239N	STMICROELECTRONICS	获取价格	LOWPOWER QUAD VOLTAGE COMPARATORS
LM239N	FAIRCHILD	获取价格	Quad Comparator

与LM239J相关文章

压敏电阻器在直流电路中的过压保护应用探讨
2024-06-07

2
电感耐压值及其与电感大小的关系
2024-06-07

5
CNY17F光耦合器：特性、应用、封装、引脚功能及替换型号解析
2024-06-07

4
DS1307资料解析：特性、引脚说明、替代推荐
2024-06-07

3

产品中心

服务支持

精选活动

关于我们

帮助中心

LM239J

LM239J 技术参数

LM239J 数据手册

与LM239J相关器件

与LM239J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

LM239J

LM239J 技术参数

LM239J 数据手册

与LM239J相关器件

与LM239J相关文章

您还可以找

您在本页遇到什么问题？