74HC42D

更新时间： 2024-10-27 22:53:15

品牌	Logo	应用领域
恩智浦 - NXP		逻辑集成电路光电二极管驱动
页数	文件大小	规格书
6页	46K
描述
BCD to decimal decoder 1-of-10

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中文翻译

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数据手册
替代型号

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74HC42D 数据手册

Philips Semiconductors

Product speciﬁcation

BCD to decimal decoder (1-of-10)

74HC/HCT42

The 74HC/HCT42 decoders accept four active HIGH BCD

inputs and provide 10 mutually exclusive active LOW

outputs. The active LOW outputs facilitate addressing

other MSI circuits with active LOW input enables.

FEATURES

• Mutually exclusive outputs

• 1-of-8 demultiplexing capability

• Outputs disabled for input codes above nine

• Output capability: standard

• I_CCcategory: MSI

The logic design of the “42” ensures that all outputs are

HIGH when binary codes greater than nine are applied to

the inputs.

The most significant input (A₃) produces an useful inhibit

function when the “42” is used as a 1-of-8 decoder. The A₃

input can also be used as the data input in an 8-output

demultiplexer application.

GENERAL DESCRIPTION

The 74HC/HCT42 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.

QUICK REFERENCE DATA

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

TYPICAL

SYMBOL

PARAMETER

CONDITIONS

UNIT

HCT

t_PHL/ t_PLH

C_I

propagation delay A_nto Y_n

input capacitance

C_L= 15 pF; V_CC= 5 V 14

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) where:

f_i= input frequency in MHz

f_o= output frequency in MHz

∑ (C_L× V_CC²× f_o) = sum of outputs

C_L= output load capacitance in pF

V_CC= supply voltage in V

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

ORDERING INFORMATION

See “74HC/HCT/HCU/HCMOS Logic Package Information”.

December 1990

123 4 5 6

中文翻译

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74HC42D 替代型号

型号	品牌	替代类型	描述	数据表
74HC42D,652	NXP	完全替代	74HC(T)42 - BCD to decimal decoder (1-of-10) SOP 16-Pin
CD74HC42M	TI	功能相似	High Speed CMOS Logic BCD To Decimal Decoder 1 of 10

与74HC42D相关器件

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