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74HCT423N

更新时间： 2024-02-18 17:56:12
品牌 Logo 应用领域
恩智浦 - NXP 振荡器
页数 文件大小 规格书
14页 107K
描述
Dual retriggerable monostable multivibrator with reset

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中文翻译

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74HCT423N 技术参数

Source Url Status Check Date：2013-06-14 00:00:00是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：TSSOP
包装说明：TSSOP, TSSOP16,.25针数：16
Reach Compliance Code：unknownHTS代码：8542.39.00.01
风险等级：5.82其他特性：RETRIGGERABLE
系列：HCTJESD-30 代码：R-PDSO-G16
JESD-609代码：e4长度：5 mm
负载电容（CL）：50 pF逻辑集成电路类型：MONOSTABLE MULTIVIBRATOR
湿度敏感等级：1数据/时钟输入次数：2
功能数量：2端子数量：16
最高工作温度：125 °C最低工作温度：-40 °C
输出极性：COMPLEMENTARY封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP16,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260电源：5 V
传播延迟（tpd）：77 ns认证状态：Not Qualified
座面最大高度：1.1 mm子类别：Prescaler/Multivibrators
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：4.5 V
标称供电电压 (Vsup)：5 V表面贴装：YES
技术：CMOS温度等级：AUTOMOTIVE
端子面层：NICKEL PALLADIUM GOLD端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：4.4 mm
Base Number Matches：1

74HCT423N 数据手册

 浏览型号74HCT423N的Datasheet PDF文件第1页浏览型号74HCT423N的Datasheet PDF文件第3页浏览型号74HCT423N的Datasheet PDF文件第4页浏览型号74HCT423N的Datasheet PDF文件第5页浏览型号74HCT423N的Datasheet PDF文件第6页浏览型号74HCT423N的Datasheet PDF文件第7页 
Philips Semiconductors  
Product specification  
Dual retriggerable monostable  
multivibrator with reset  
74HC/HCT423  
(CEXT). The external resistor and capacitor are normally  
connected as shown in Fig.6.  
FEATURES  
• DC triggered from active HIGH or active LOW inputs  
Once triggered, the basic output pulse width may be  
extended by retriggering the gated active LOW-going edge  
input (nA) or the active HIGH-going edge input (nB). By  
repeating this process, the output pulse period  
• Retriggerable for very long pulses up to 100% duty  
factor  
• Direct reset terminates output pulse  
• Schmitt-trigger action on all inputs except for the reset  
input  
(nQ = HIGH, nQ = LOW) can be made as long as desired.  
When nRD is LOW, it forces the nQ output LOW, the  
nQ output HIGH and also inhibits the triggering.  
• Output capability: standard (except for nREXT/CEXT  
• ICC category: MSI  
)
Figures 7 and 8 illustrate pulse control by reset. The basic  
output pulse width is essentially determined by the values  
of the external timing components REXT and CEXT  
.
GENERAL DESCRIPTION  
For pulse widths, when CEXT < 10 000 pF, see Fig.9.  
When CEXT > 10 000 pF, the typical output pulse width is  
defined as:  
tW = 0.45 × REXT × CEXT (typ.),  
where, tW = pulse width in ns;  
The 74HC/HCT423 are high-speed Si-gate CMOS devices  
and are pin compatible with low power Schottky TTL  
(LSTTL). They are specified in compliance with JEDEC  
standard no. 7A.  
R
EXT = external resistor in kΩ;  
The 74HC/HCT423 are dual retriggerable monostable  
multivibrators with output pulse width control by two  
methods. The basic pulse time is programmed by  
selection of an external resistor (REXT) and capacitor  
CEXT = external capacitor in pF.  
Schmitt-trigger action in the nA and nB inputs, makes the  
circuit highly tolerant to slower input rise and fall times.  
The “423” is identical to the “123” but cannot be triggered  
via the reset input.  
QUICK REFERENCE DATA  
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns  
TYPICAL  
SYMBOL  
PARAMETER  
propagation delay  
CONDITIONS  
UNIT  
HC  
HCT  
t
PHL/ tPLH  
CL = 15 pF; VCC = 5 V;  
REXT = 5 kΩ; CEXT = 0 pF  
nA, nB to nQ, nQ  
nRD to nQ, nQ  
25  
20  
3.5  
75  
26  
22  
ns  
ns  
pF  
ns  
CI  
tW  
input capacitance  
3.5  
75  
minimum output pulse width nQ, nQ notes 1 and 2  
Notes  
1. CPD is used to determine the dynamic power dissipation (PD in µW):  
PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) + 0.75 × CEXT × VCC2 × fo + D × 16 × VCC where:  
fi = input frequency in MHz  
fo = output frequency in MHz  
D = duty factor in %  
∑ (CL × VCC2 × fo) = sum of outputs  
CL = output load capacitance in pF  
VCC = supply voltage in V  
CEXT = timing capacitance in pF  
2. For HC the condition is VI = GND to VCC  
For HCT the condition is VI = GND to VCC − 1.5 V  
1998 Jul 08  
2
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中文翻译

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74HCT423N 替代型号

型号 品牌 替代类型 描述 数据表
74HCT423N NXP

当前型号

 Dual retriggerable monostable multivibrator with reset
74HCT423N,112 NXP

完全替代

 74HC(T)423 - Dual retriggerable monostable multivibrator with reset DIP 16-Pin

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