MC74HC42 데이터 시트보기 (PDF) - Motorola => Freescale

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MC74HC42

1-of-10 decoder High–Performance Silicon–Gate CMOS

Motorola => Freescale 

MC74HC42

PIN DESCRIPTIONS

INPUTS

A0, A1, A2, A3, (Pins 15, 14, 13, 12)

BCD Address Inputs. The BCD address present at these

inputs determines which output is active–low. These inputs

are arranged such that A3 is the most–significant bit and A0

is the least significant bit. Addresses with a hexadecimal

equivalent number greater than nine are not decoded

OUTPUTS

Y0 – Y9 (Pins 1 – 7, 9 – 11)

Active–Low Decoded Outputs. These outputs assume a

low level when addressed and remain high when not ad-

dressed.

15

A0

14

A1

13

A2

12

A3

EXPANDED LOGIC DIAGRAM

1

Y0

2

Y1

3

Y2

4

Y3

5

Y4

6

Y5

7

Y6

9

Y7

10

Y8

11

Y9

MOTOROLA

4

High–Speed CMOS Logic Data

DL129 — Rev 6

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