PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCTION

1, 19

GBA , GAB

Direction Controls

2, 3, 4, 5, 6, 7, 8, 9

A1 to A8

Data Inputs/Outputs

11, 12, 13, 14, 15, 16, 17, 18

B1 to B8

Data Inputs/Outputs

10

GND

Ground (0V)

20

Positive Supply Voltage

IEC LOGIC SYMBOLS

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Supply Voltage

-0.5 to +7

V

DC Input Voltage

V

DC Output Voltage

V

DC Input Diode Current

± 20

mA

DC Output Diode Current

± 20

mA

DC Output Source Sink Current Per Output Pin

± 35

mA

± 70

mA

Power Dissipation

500 (*)

mW

Storage Temperature

-65 to +150

Lead Temperature (10 sec)

300

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

(*) 500 mW:

HC620

HC623

M54/M74HC620/623

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