Datasheet > 74HC688U

74HC688U

更新时间： 2023-06-15 00:00:00

品牌	Logo	应用领域
恩智浦 - NXP		输出元件
页数	文件大小	规格书
7页	48K
描述
IC HC/UH SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, UUC, CHIP ON WAFER, Arithmetic Circuit

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数据手册

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74HC688U 数据手册

Philips Semiconductors

Product speciﬁcation

8-bit magnitude comparator

74HC/HCT688

FEATURES

GENERAL DESCRIPTION

• Compare two 8-bit words

• Output capability: standard

• I_CCcategory: MSI

The 74HC/HCT688 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 74HC/HCT688 are 8-bit magnitude comparators.

They perform comparison of two 8-bit binary or BCD

words.

The output provides P = Q.

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

propagation delay

P_n, Q_nto P = Q

E to P = Q

C_L= 15 pF; V_CC= 5 V

3.5

C_I

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_CC× 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 7

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