PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCT ION

1

DIR

Directional Control

2, 3, 4, 5,

6, 7, 8, 9

A1 to A8

Data Inputs/Outputs

18, 17, 16,

15, 14, 13,

12, 11

B1 to B8

Data Inputs/Outputs

19

G

Output Enable Input

10

GND

Ground (0V)

20

Positive Supply Voltage

TRUTH TABLE

INPUT

F UNCTI ON

OUT PUT

GDIR

A BUS

B BUS

L

L

OUTPUT

INPUT

A = B

L

H

INPUT

OUTPUT

B = A

HX

Z

Z

Z

X:”H” or ”L”

Z: High impedance

INPUT EQUIVALENT CIRCUIT

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Val ue

Unit

Supply Voltage

-0.5 to +7.0

V

DC Input Voltage (DIR, G)

-0.5 to +7.0

V

Bus I/O Voltage

V

DC Output Voltage

V

DC Input Diode Current

- 20

mA

DC Output Diode Current

± 20

mA

DC Output Current

± 25

mA

± 75

mA

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.

RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Valu e

Uni t

Supply Voltage

2.0 to 5.5

V

Input Voltage (DIR, G)

0 to 5.5

V

Bus I/O Voltage

V

Output Voltage

V

Operating Temperature

-40 to +85

dt/dv

± 0.3V)

± 0.5V)

0 to 100

0to 20

ns/V

ns/V

74VHC245

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