JVC KD-LX555R service manual 4.7HD74HCT126T-X IC1500,IC1503 Buffer

4.7HD74HCT126T-X : (IC1500,IC1503) Buffer

• Pin arrangement

1C	1	14	Vcc
1A	2	13	4C
1Y	3	12	4A
2C	4	11	4Y
2A	5	10	3C
2Y	6	9	3A
GND 7		8	3Y
• Block diagram

1A

1C

2A

2C

3A

3C

4A

4C

• Pin function

	Input		Output
C		A	Y
L		X	Z
H		L	L
H		H	H

H : High level

L : Low level

X : Irrelevant

Z : Off (Hhigh-impedance)state of a 3-stage output

1Y

2Y

3Y

4Y

(No.49793)1-37