74HC221D

更新时间： 2024-01-30 12:21:54

品牌	Logo	应用领域
恩智浦 - NXP		振荡器预分频器多谐振动器逻辑集成电路光电二极管输入元件时钟
页数	文件大小	规格书
15页	254K
描述
Dual non-retriggerable monostable multivibrator with reset

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技术参数
数据手册

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74HC221D 技术参数

Source Url Status Check Date：	2013-06-14 00:00:00	是否无铅：	不含铅
是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	DIP	包装说明：	DIP, DIP16,.3
针数：	16	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.29	其他特性：	NON-RETRIGGERABLE; TRIGGERABLE FROM CLEAR INPUT ALSO
系列：	HC/UH	JESD-30 代码：	R-PDIP-T16
长度：	21.6 mm	负载电容（CL）：	50 pF
逻辑集成电路类型：	MONOSTABLE MULTIVIBRATOR	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：	DIP	封装等效代码：	DIP16,.3
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT APPLICABLE	电源：	2/6 V
传播延迟（tpd）：	54 ns	认证状态：	Not Qualified
座面最大高度：	4.7 mm	子类别：	Prescaler/Multivibrators
最大供电电压 (Vsup)：	6 V	最小供电电压 (Vsup)：	2 V
标称供电电压 (Vsup)：	5 V	表面贴装：	NO
技术：	CMOS	温度等级：	AUTOMOTIVE
端子面层：	NICKEL/PALLADIUM/GOLD (NI/PD/AU)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT APPLICABLE	宽度：	7.62 mm
Base Number Matches：	1

74HC221D 数据手册

Philips Semiconductors

Product speciﬁcation

Dual non-retriggerable monostable

multivibrator with reset

74HC/HCT221

jitter-free triggering from inputs with slow transition rates,

providing the circuit with excellent noise immunity.

FEATURES

• Pulse width variance is typically less than ± 5%

• Pin-out identical to “123”

Once triggered, the outputs (nQ, nQ) are independent of

further transitions of nA and nB inputs and are a function

of the timing components. The output pulses can be

terminated by the overriding active LOW reset inputs

(nR_D). Input pulses may be of any duration relative to the

output pulse.

• Overriding reset terminates output pulse

• nB inputs have hysteresis for improved noise immunity

• Output capability: standard (except for nR_EXT/C_EXT

• I_CCcategory: MSI

)

Pulse width stability is achieved through internal

compensation and is virtually independent of V_CCand

temperature. In most applications pulse stability will only

be limited by the accuracy of the external timing

components.

GENERAL DESCRIPTION

The 74HC/HCT221 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.

The output pulse width is defined by the following

relationship:

The 74HC/HCT221 are dual non-retriggerable monostable

multivibrators. Each multivibrator features an active

LOW-going edge input (nA) and an active HIGH-going

edge input (nB), either of which can be used as an enable

input.

t_W= C_EXTR_EXTIn₂

t_W= 0.7C_EXTR_EXT

Pin assignments for the “221” are identical to those of the

“123” so that the “221” can be substituted for those

products in systems not using the retrigger by merely

Pulse triggering occurs at a particular voltage level and is

not directly related to the transition time of the input pulse.

Schmitt-trigger input circuitry for the nB inputs allow

changing the value of R_EXTand/or C_EXT

QUICK REFERENCE DATA

GND = 0 V; T_amb= 25 °C; t_r= t_f= 6 ns

TYPICAL

HC HCT

SYMBOL PARAMETER

CONDITIONS

UNIT

propagation delay

C_L= 15 pF; V_CC= 5 V;

R_EXT= 5 kΩ; C_EXT= 0 pF

t_PHL

t_PLH

C_I

nA, nB, nR_Dto nQ, nQ

input capacitance

3.5

C_PD

power dissipation capacitance per package notes 1 and 2

Notes

1. C_PDis used to determine the dynamic power dissipation (P_Din µW):

P_D= C_PD× V_CC²× f_i+ ∑ (C_L× V_CC²× f_o) + 0.33 × C_EXT× V_CC× f_o+ D × 28 × V_CCwhere:

f_i= input frequency in MHz; f_o= output frequency in MHz

∑ (C_L× V_CC²× f_o) = sum of outputs

C_EXT= timing capacitance in pF; C_L= output load capacitance in pF

V_CC= supply voltage in V; D = duty factor in %

2. For HC the condition is V_I= GND to V_CC

For HCT the condition is V_I= GND to V_CC− 1.5 V

December 1990

123 4 5 6 7...15

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与74HC221D相关器件

型号	品牌	描述	获取价格	数据表
74HC221D,652	NXP	74HC(T)221 - Dual non-retriggerable monostable multivibrator with reset SOP 16-Pin	获取价格
74HC221DB	NXP	IC HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16, SOT-338-1, SSOP-16, Prescaler/Mult	获取价格
74HC221DB,112	NXP	74HC(T)221 - Dual non-retriggerable monostable multivibrator with reset SSOP1 16-Pin	获取价格
74HC221DB,118	NXP	74HC(T)221 - Dual non-retriggerable monostable multivibrator with reset SSOP1 16-Pin	获取价格
74HC221D-T	ETC	Monostable Multivibrator	获取价格
74HC221N	NXP	Dual non-retriggerable monostable multivibrator with reset	获取价格

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