INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCTION

5, 4

RA, RB

Read Address Inputs

10, 9, 7, 6

Q1 to Q4

Data Outputs

11

RE

3 State Output Read

Enable Input (Active LOW)

12

WE

Write Enable Input (Active

LOW)

14, 13

WA, WB

Write Address Inputs

15, 1, 2, 3

D1 to D4

Data Inputs

7

GND

Ground (0V)

14

Positive Supply Voltage

IEC LOGIC SYMBOL

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

± 25

mA

± 50

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:

M54/M74HC670

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