參數(shù)資料
型號(hào)： ICM7555ID
廠商： NXP Semiconductors N.V.
元件分類： 時(shí)鐘及定時(shí)
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(yè)數(shù)： 12/22頁(yè)
文件大?。?/td> 122K
代理商： ICM7555ID
ICM7555_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 3 August 2009
12 of 22
NXP Semiconductors
ICM7555
General purpose CMOS timer
11.4 Astable operation
If the circuit is connected as shown in
Figure 15
, it will trigger itself and free run as a
multivibrator. The external capacitor charges through R
A
and R
B
and discharges through
R
B
only. Thus, the duty cycle (
δ
) may be precisely set by the ratio of these two resistors. In
this mode of operation, the capacitor charges and discharges between
1
3
V
DD
and
2
3
V
DD
. Since the charge rate and the threshold levels are directly proportional to the
supply voltage, the frequency of oscillation is independent of the supply voltage.
(1)
(2)
11.5 Monostable operation
In this mode of operation, the timer functions as a one-shot. Initially, the external
capacitor (C) is held discharged by a transistor inside the timer. Upon application of a
negative pulse to pin 2, TRIGGER, the internal flip-flop is set, which releases the
low-impedance on DISCHARGE; the external capacitor charges and drives the OUTPUT
HIGH. The voltage across the capacitor increases exponentially with a time constant
t = R
A
C. When the voltage across the capacitor equals
2
3
V+, the comparator resets the
flip-flop, which in turn discharges the capacitor rapidly and also drives the OUTPUT to its
LOW state. TRIGGER must return to a HIGH state before the OUTPUT can return to a
LOW state.
Fig 15. Astable operation
f
2R
B
+
R
A
(
)
C
×
--------------------------------------
=
δ
R
R
A
2R
B
+
----------------------
=
GND
TRIGGER
OUTPUT
RESET
1
2
3
4
V
DD
C
RB
RA
V
DD
OUTPUT
DISCHARGE
THRESHOLD
CONTROL_VOLTAGE
V
DD
8
7
6
5
V
DD
002aae418
相關(guān)PDF資料
PDF描述
ICY7C1362C-166BGI 9-Mbit (256K x 36/512K x 18) Pipelined SRAM
ICY7C1362C-166BZI 9-Mbit (256K x 36/512K x 18) Pipelined SRAM
ICY7C1362C-166BGXI 9-Mbit (256K x 36/512K x 18) Pipelined SRAM
ID100 MONOLITHIC DUAL PICO AMPERE DIODES
ID100 SCRs .5 Amp, Planar
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICM7555ID,602 功能描述:計(jì)時(shí)器和支持產(chǎn)品 CMOS TIMER -40 TO +85 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)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
ICM7555ID,623 功能描述:計(jì)時(shí)器和支持產(chǎn)品 CMOS TIMER -40 TO +85 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)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
ICM7555ID/01,112 功能描述:計(jì)時(shí)器和支持產(chǎn)品 CMOS TIMR -40 TO +85 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)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
ICM7555ID/01,118 功能描述:計(jì)時(shí)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(shí)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
ICM7555ID/01,118-CUT TAPE 制造商:NXP 功能描述:ICM7555 Series 500 kHz 16 V 80 uA General Purpose CMOS Timer - SOIC-8
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*