74HC148 datasheet(3/11 Pages) STMICROELECTRONICS

部品番号	74HC148

部品情報	8 TO 3 LINE PRIORITY ENCODER

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PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCTION

9, 7, 6

A0 to A2

Data Outputs

11, 12, 13,

1, 2, 3, 4,

10

0 to 7

Data Inputs

15

EO

Enable Output

5

EI

Enable Input

14

GS

Priority Flag Output

8

GND

Ground (0V)

16

VCC

Positive Supply Voltage

IEC LOGIC SYMBOL

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

VCC

Supply Voltage

-0.5 to +7

V

VI

DC Input Voltage

-0.5 to VCC + 0.5

V

VO

DC Output Voltage

-0.5 to VCC + 0.5

V

IIK

DC Input Diode Current

± 20

mA

IOK

DC Output Diode Current

± 20

mA

IO

DC Output Source Sink Current Per Output Pin

± 25

mA

ICC or IGND

DC VCC or Ground Current

± 50

mA

PD

Power Dissipation

500 (*)

mW

Tstg

Storage Temperature

-65 to +150

oC

TL

Lead Temperature (10 sec)

300

oC

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.

(*) 500 mW:

≅ 65 oC derate to 300 mW by 10mW/oC: 65 oCto 85 oC

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Value

Unit

VCC

Supply Voltage

2 to 6

V

VI

Input Voltage

0 to VCC

V

VO

Output Voltage

0 to VCC

V

Top

Operating Temperature: M54HC Series

M74HC Series

-55 to +125

-40 to +85

oC

tr,tf

Input Rise and Fall Time

VCC = 2 V

0 to 1000

ns

VCC = 4.5 V

0 to 500

VCC = 6 V

0 to 400

M54/M74HC148

3/11

同様の部品番号 - 74HC148

メーカー	部品番号	データシート	部品情報
Fairchild Semiconductor	74HC148	77Kb / 8P	8-3 Line Priority Encoder
Hitachi Semiconductor	74HC148	45Kb / 8P	8-to-3-line Octal Priority Encoder

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同様の説明 - 74HC148

メーカー	部品番号	データシート	部品情報
Toshiba Semiconductor	TC74HC148AP	353Kb / 9P	8-to-3 Line Priority Encoder
Fairchild Semiconductor	74F148	61Kb / 6P	8-Line to 3-Line Priority Encoder
STMicroelectronics	M74HC148	329Kb / 11P	8 TO 3 LINE PRIORITY ENCODER
List of Unclassifed Man...	GD74HCT148	207Kb / 4P	8-TO-3 LINE PRIORITY ENCODER
Fairchild Semiconductor	MM74HC148	77Kb / 8P	8-3 Line Priority Encoder
Hitachi Semiconductor	HD74HC148	45Kb / 8P	8-to-3-line Octal Priority Encoder
Renesas Technology Corp	HD74HC148	79Kb / 6P	8-to-3-line Octal Priority Encoder
National Semiconductor ...	MM74HCT148	215Kb / 5P	8-3 Line Priority Encoder
National Semiconductor ...	MM54HC148	127Kb / 6P	8-3 Line Priority Encoder
Renesas Technology Corp	HD74LS148	72Kb / 6P	8-line-to-3-line Octal Priority Encoder