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參數(shù)資料
| 型號(hào)： | ICM7555CBA-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OSC MONO TIMING 1MHZ 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 555 型，計(jì)時(shí)器/振蕩器（單路） |
| 頻率： | 1MHz |
| 電源電壓： | 2 V ~ 18 V |
| 電流 - 電源： | 60µA |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 包裝： | 帶卷 (TR) |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 安裝類型： | 表面貼裝 |
5
FN2867.9
August 24, 2006
Schematic Diagram
Application Information
General
The ICM7555 and ICM7556 devices are, in most instances,
direct replacements for the NE/SE 555/6 devices. However,
it is possible to effect economies in the external component
count using the ICM7555 and ICM7556. Because the bipolar
NE/SE 555/6 devices produce 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
and ICM7556 devices produce no such transients. See
Figure 1.
The ICM7555 and ICM7556 produce supply current spikes
of only 2mA - 3mA instead of 300mA - 400mA and supply
decoupling is normally not necessary. Also, 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, two capacitors can be saved using an ICM7555
and three capacitors with an ICM7556.
POWER SUPPLY CONSIDERATIONS
Although the supply current consumed by the ICM7555 and
ICM7556 devices is very low, the total system supply current
can be high unless the timing components are high
impedance. Therefore, use high values for R and low values
RESET
DISCHARGE
TRIGGER
THRESHOLD
GND
OUTPUT
CONTROL
VOLTAGE
R
NN
NPN
P
R
VDD
N
P
N
P
R = 100k
Ω ±20% (TYP)
TIME (ns)
400
800
600
200
0
100
200
300
400
500
SUPP
L
Y
CURRENT
(
m
A)
SE/NE555
TA = 25°C
ICM7555/56
FIGURE 1. SUPPLY CURRENT TRANSIENT COMPARED WITH
A STANDARD BIPOLAR 555 DURING AN OUTPUT
TRANSITION
GND
TRIGGER
OUTPUT
RESET
1
2
3
4
8
7
6
5
VDD
DISCHARGE
THRESHOLD
CONTROL
VOLTAGE
VDD
10K
A
LTER
NAT
E
O
U
TPUT
OPTIONAL
CAPACITOR
C
VDD
R
FIGURE 2A. ASTABLE OPERATION
ICM7555, ICM7556
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| ICM7555CD | 制造商:NXP Semiconductors 功能描述: 制造商:Philips Semiconductor 功能描述: 制造商:PHILIPS-SEMI 功能描述: |
| ICM7555CD,602 | 功能描述:計(jì)時(shí)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(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 |
| ICM7555CD,623 | 功能描述:計(jì)時(shí)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(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 |
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