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| 型號： | ICM7555CD |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 時鐘及定時 |
| 英文描述： | General purpose CMOS timer |
| 封裝： | ICM7555CD/01<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week 12, 2005,;ICM7555CD/01<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<week |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 122K |
| 代理商： | ICM7555CD |
ICM7555_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 3 August 2009
11 of 22
NXP Semiconductors
ICM7555
General purpose CMOS timer
11. Application information
11.1 General
The ICM7555 device is, in most instances, a direct replacement for the NE/SE555 device.
However, it is possible to effect economies in the external component count using the
ICM7555. Because the NE/SE555 device produces large crowbar currents in the output
driver, it is necessary to decouple the power supply lines with a good capacitor close to
the device. The ICM7555 device produces no such transients. See
Figure 14
.
The ICM7555 produces supply current spikes of only 2 mA to 3 mA instead of
300 mA to 400 mA and supply decoupling is normally not necessary. Secondly, in most
instances, the CONTROL_VOLTAGE decoupling capacitors are not required since the
input impedance of the CMOS comparators on chip are very high. Thus, for many
applications, 2 capacitors can be saved using an ICM7555.
11.2 Power supply considerations
Although the supply current consumed by the ICM7555 device is very low, the total
system supply can be high unless the timing components are high-impedance. Therefore,
high values for R and low values for C in
Figure 15
and
Figure 16
are recommended.
11.3 Output drive capability
The output driver consists of a CMOS inverter capable of driving most logic families
including CMOS and TTL. As such, if driving CMOS, the output swing at all supply
voltages will equal the supply voltage. At a supply voltage of 4.5 V or more, the ICM7555
will drive at least 2 standard TTL loads.
T
amb
= +25
°
C
(1) NE/SE555
(2) ICM7555
Fig 14. Supply current transient compared with a standard NE/SE555 device during an
output transition
100
300
500
I
DD
(mA)
100
time (ns)
0
800
600
200
400
002aae417
(1)
(2)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICM7555CD,602 | 功能描述:計時器和支持產(chǎn)品 CMOS TIMER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| ICM7555CD,623 | 功能描述:計時器和支持產(chǎn)品 CMOS TIMER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| ICM7555CD/01 | 功能描述:計時器和支持產(chǎn)品 CMOS TIMER 0 TO +70 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| ICM7555CD/01,112 | 功能描述:計時器和支持產(chǎn)品 CMOS TIMER 0 TO +70 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| ICM7555CD/01,118 | 功能描述:計時器和支持產(chǎn)品 CMOS TIMER GEN-PURPOSE RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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