Nexperia

74HC21

Dual 4-input AND gate

6. Functional description

Table 3. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care.

Input

Output

nA

nB

nC

nD

nY

L

X

X

X

L

X

L

X

X

L

X

X

L

X

L

X

X

X

L

L

H

H

H

H

H

7. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

Min

Max

Unit

VCC

supply voltage

-0.5

+7

V

IIK

input clamping current

VI < -0.5 V or VI > VCC + 0.5 V

[1]

-

±20

mA

IOK

output clamping current

VO < -0.5 V or VO > VCC + 0.5 V

[1]

-

±20

mA

IO

output current

-0.5 V < VO < VCC + 0.5 V

-

±25

mA

ICC

supply current

-

50

mA

IGND

ground current

-50

-

mA

Tstg

storage temperature

-65

+150 °C

Ptot

total power dissipation

[2]

-

500

mW

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

[2] For SOT108-1 (SO14) package: Ptot derates linearly with 10.1 mW/K above 100 °C.

For SOT402-1 (TSSOP14) package: Ptot derates linearly with 7.3 mW/K above 81 °C.

8. Recommended operating conditions

Table 5. Recommended operating conditions

Voltages are referenced to GND (ground = 0 V)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VCC

supply voltage

2.0

5.0

6.0

V

VI

input voltage

0

-

VCC

V

VO

output voltage

0

-

VCC

V

VCC = 2.0 V

-

-

625

ns/V

VCC = 4.5 V

-

1.67

139

ns/V

Δt/ΔV

input transition rise and fall

rate

VCC = 6.0 V

-

-

83

ns/V

Tamb

ambient temperature

-40

-

+125

°C

74HC21

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© Nexperia B.V. 2023. All rights reserved

Product data sheet

Rev. 9 — 2 May 2023

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