6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)

MIN

MAX

UNIT

VCC

Supply voltage

–0.5

7

V

IIK

Input clamp current(2)

VI < –0.5 V or VI > VCC +

0.5 V

±20

mA

IOK

Output clamp current(2)

VO < –0.5 V or VO > VCC +

0.5 V

±20

mA

IO

Continuous output current

VO > –0.5 V or VO < VCC +

0.5 V

±25

mA

Continuous current through VCC or GND

±50

mA

TJ

Junction temperature(3)

150

°C

Lead temperature (soldering 10s)

SOIC - lead tips only

300

°C

Tstg

Storage temperature

–65

150

°C

(1)

Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress

ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated

under Recommended Operating Condition. Exposure to absolute-maximum-rated conditions for extended periods may affect device

reliability.

(2)

The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

(3)

Guaranteed by design.

6.2 ESD Ratings

VALUE

UNIT

V(ESD)

Electrostatic discharge

Human-body model (HBM), per ANSI/ESDA/

JEDEC JS-001(1)

±2000

V

Charged-device model (CDM), per JEDEC

specification JESD22-C101(2)

–

(1)

JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2)

JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

NOM

MAX

UNIT

VCC

Supply voltage

2

5

6

V

VIH

High-level input voltage

VCC = 2 V

1.5

V

VCC = 4.5 V

3.15

VCC = 6 V

4.2

VIL

Low-level input voltage

VCC = 2 V

0.5

V

VCC = 4.5 V

1.35

VCC = 6 V

1.8

VI

Input voltage

0

VCC

V

VO

Output voltage

0

VCC

V

tt

Input transition time

VCC = 2 V

1000

ns

VCC = 4.5 V

500

VCC = 6 V

400

TA

Operating free-air temperature

–55

125

°C

CD74HC21, CD54HC21

SCHS131D – AUGUST 1997 – REVISED MAY 2021

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