参数资料
| 型号： | ICM7556IPDZ |
| 厂商： | Intersil |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC OSC TIMER DUAL 1MHZ 14DIP |
| 标准包装： | 25 |
| 类型： | 555 型，计时器/振荡器（双路） |
| 频率： | 1MHz |
| 电源电压： | 2 V ~ 18 V |
| 电流 - 电源： | 120µA |
| 工作温度： | -25°C ~ 85°C |
| 封装/外壳： | 14-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 14-PDIP |
| 安装类型： | 通孔 |
| 产品目录页面： | 1236 (CN2011-ZH PDF) |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICM7556ISD | 功能描述:计时器和支持产品 Low-Power General Purpose Timer RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| ICM7556ISD+ | 功能描述:计时器和支持产品 Low-Power General Purpose Timer RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| ICM7556ISD+T | 功能描述:计时器和支持产品 Low-Power General Purpose Timer RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| ICM7556ISD-T | 功能描述:计时器和支持产品 Low-Power General Purpose Timer RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel |
| ICM7556ITT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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