MC74

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2

PIN DESCRIPTION FOR TO–220–5

Pin No.

Symbol

Type

Description

1

NC

None

Not Connected

2

SDA

Bi–directional

SMBus Serial Data

3

GND

Power

System Ground

4

SCL

Input

SMBus Serial Clock

5

VDD

Power

Power Supply Input

PIN DESCRIPTION FOR SOT–23–5

Pin No.

Symbol

Type

Description

1

NC

None

Not Connected

2

GND

Power

System Ground

3

VDD

Power

Power Supply Input

4

SCL

Input

SMBus Serial Clock

5

SDA

Bi–directional

SMBus Serial Data

PIN DESCRIPTION

SCL

Input. SMBus serial clock. Clocks data into and out of the

MC74. See System Management Bus Specification, rev. 1.0,

for timing diagrams.

SDA

Bi–directional. Serial data is transferred on the SMBus in

both directions using this pin. See System Management Bus

Specification rev. 1.0 for timing diagrams.

VDD

Input. Power supply input. See electrical specifications.

GND

Input. Ground return for all MC74 functions.

ABSOLUTE MAXIMUM RATINGS*

Symbol

Parameter

Value

Unit

VDD

Power Supply Voltage

6.0

V

Voltage on Any Pin

(GND – 0.3 V) to (VDD + 0.3 V)

V

TA

Operating Temperature Range

–40 to +125

°C

Tstg

Storage Temperature Range

–65 to +150

°C

Current on Any Pin

±50

mA

PD

Maximum Power Dissipation

330

mW

* Maximum Ratings are those values beyond which damage to the device may occur.