数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

LM139 数据表(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM139
功能描述  Low Power Low Offset Voltage Quad Comparators
Download  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM139 数据表(HTML) 7 Page - National Semiconductor (TI)

Back Button LM139 Datasheet HTML 3Page - National Semiconductor (TI) LM139 Datasheet HTML 4Page - National Semiconductor (TI) LM139 Datasheet HTML 5Page - National Semiconductor (TI) LM139 Datasheet HTML 6Page - National Semiconductor (TI) LM139 Datasheet HTML 7Page - National Semiconductor (TI) LM139 Datasheet HTML 8Page - National Semiconductor (TI) LM139 Datasheet HTML 9Page - National Semiconductor (TI) LM139 Datasheet HTML 10Page - National Semiconductor (TI) LM139 Datasheet HTML 11Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 19 page
background image
Application Hints
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 k
Ω 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.
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
DC to 30 VDC.
It is usually unnecessary to use a bypass capacitor across
the power supply line.
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.
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 60
Ω R
SAT of 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.
Typical Applications (V+ = 5.0 V
DC)
Basic Comparator
00570603
Driving CMOS
00570604
Driving TTL
00570605
AND Gate
00570608
OR Gate
00570609
www.national.com
7


类似零件编号 - LM139

制造商部件名数据表功能描述
logo
NXP Semiconductors
LM139 PHILIPS-LM139 Datasheet
75Kb / 10P
   Quad voltage comparator
1995 Nov 27
logo
Texas Instruments
LM139 TI-LM139 Datasheet
1Mb / 48P
[Old version datasheet]   LM339B, LM2901B, LM339, LM239, LM139, LM2901 Quad Differential Comparators
REVISED DECEMBER 2022
logo
STMicroelectronics
LM139 STMICROELECTRONICS-LM139 Datasheet
163Kb / 10P
   LOWPOWER QUAD VOLTAGE COMPARATORS
logo
Texas Instruments
LM139 TI1-LM139 Datasheet
1Mb / 48P
[Old version datasheet]   LM339B, LM2901B, LM339, LM239, LM139, LM2901 Quad Differential Comparators
REVISED DECEMBER 2022
LM139 TI-LM139 Datasheet
518Kb / 19P
[Old version datasheet]   QUAD DIFFERENTIAL COMPARATORS
More results

类似说明 - LM139

制造商部件名数据表功能描述
logo
Leshan Radio Company
LR339 LRC-LR339 Datasheet
134Kb / 6P
   Low Power Low Offset Voltage Quad Comparators
logo
BCD Semiconductor Manuf...
AS339,339A BCDSEMI-AS339,339A Datasheet
729Kb / 11P
   LOW POWER LOW OFFSET VOLTAGE QUAD COMPARATORS
logo
Diodes Incorporated
AS339 DIODES-AS339 Datasheet
432Kb / 12P
   LOW POWER LOW OFFSET VOLTAGE QUAD COMPARATORS
logo
National Semiconductor ...
LM2901EP NSC-LM2901EP Datasheet
750Kb / 17P
   Low Power Low Offset Voltage Quad Comparators
logo
Tiger Electronic Co.,Lt...
LM2901D TGS-LM2901D Datasheet
249Kb / 4P
   Low Power Low Offset Voltage Quad Comparators
logo
Texas Instruments
LM139AQML TI1-LM139AQML_16 Datasheet
1Mb / 29P
[Old version datasheet]   LOW POWER LOW OFFSET VOLTAGE QUAD COMPARATORS
logo
National Semiconductor ...
LM139JAN NSC-LM139JAN Datasheet
770Kb / 20P
   Low Power Low Offset Voltage Quad Comparators
logo
Tiger Electronic Co.,Lt...
LM339D TGS-LM339D Datasheet
2Mb / 4P
   Low Power Low Offset Voltage Quad Comparators
logo
List of Unclassifed Man...
AZ339 ETC1-AZ339 Datasheet
246Kb / 9P
   LOW POWER LOW OFFSET VOLTAGE QUAD COMPARATORS
logo
Shaoxing Devechip Micro...
SDP339 SDC-SDP339 Datasheet
550Kb / 11P
   LOW POWER LOW OFFSET VOLTAGE QUAD COMPARATORS
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com