Philips 74HC21 Technical data

74HC21

Dual 4-input AND gate

Rev. 03 — 12 November 2004 Product data sheet

1. General description

The 74HC21 is a high-speed Si-gate CMOS device and is pin compatible with low-power
Schottky TTL (LSTTL). The 74HC21 is specified in compliance with JEDEC
standard no. 7A.

The 74HC21 provide the 4-input AND function.

2. Features

■ Low-power dissipation

■ Complies with JEDEC standard no. 7A

■ ESD protection:

◆ HBM EIA/JESD22-A114-B exceeds 2000 V

◆ MM EIA/JESD22-A115-A exceeds 200 V.

■ Multiple package options

■ Specified from −40 °Cto+80°C and from −40 °C to +125 °C.

3. Quick reference data

Table 1: Quick reference data

GND = 0 V; T

Symbol Parameter Conditions Min Typ Max Unit

, t

t

PHL

C

I

C

PD

[1] CPD is used to determine the dynamic power dissipation (PD in µW).

PD=CPD× V
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC= supply voltage in V;
N =number of inputs switching;
∑(CL× V

amb

PLH

CC

=25°C; tr=tf= 6 ns.

propagation delay nA,
nB, nC, nD to nY

input capacitance - 3.5 - pF
power dissipation

capacitance

2

× fi× N+∑(CL× V

CC

2

× fo) = sum of outputs.

CL=15pF;
V

CC

VI= GND to V

2

× fo) where:

CC

=5V

CC

-10-ns

[1]

-15-pF

Philips Semiconductors

74HC21

Dual 4-input AND gate

4. Ordering information

Table 2: Ordering information

Type number Package

Temperature range Name Description Version

74HC21N −40 °C to +125 °C DIP14 plastic dual in-line package; 14 leads (300 mil) SOT27-1
74HC21D −40 °C to +125 °C SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
74HC21DB −40°C to +125 °C SSOP14 plastic shrink small outline package; 14 leads; body width

SOT337-1

5.3 mm

5. Functional diagram

1A

1

1B

2

1C

4

1D

5

2A

9

2B

10

2C

12

2D

13

1Y

2Y

001aab975

6

8

1A

1

1B

2

1C

4

1D

5

2A

9

2B

10

2C

12

2D

13

Fig 1. Functional diagram Fig 2. Logic symbol

1
2
4
5

9
10
12
13

&

&

001aab974

6

8

A

B

C

D

1Y

2Y

001aab973

001aab976

6

8

Y

Fig 3. IEC logic symbol Fig 4. Logic diagram

9397 750 13806 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Product data sheet Rev. 03 — 12 November 2004 2 of 15

Philips Semiconductors

6. Pinning information

6.1 Pinning

74HC21

Dual 4-input AND gate

Fig 5. Pin configuration

6.2 Pin description

Table 3: Pin description

Symbol Pin Description

1A 1 data input 1A
1B 2 data input 1B
n.c. 3 not connected
1C 4 data input 1C
1D 5 data input 1D
1Y 6 data output 1
GND 7 ground (0 V)
2Y 8 data output 2
2A 9 data input 2A
2B 10 data input 2B
n.c. 11 not connected
2C 12 data input 2C
2D 13 data input 2D
V

CC

14 positive supply voltage

1

1A V

2

1B 2D

3

n.c. 2C

4

1C n.c.

5

1D 2B

6

1Y 2A

7 8

GND 2Y

21

001aab972

14

13

12

11

10

9

CC

9397 750 13806 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Product data sheet Rev. 03 — 12 November 2004 3 of 15

Philips Semiconductors

7. Functional description

7.1 Function table

74HC21

Dual 4-input AND gate

Table 4: Function table

Input Output
nA nB nC nD nY

LXXXL
XLXXL
XXLXL
XXXLL
HHHHH

[1] H = HIGH voltage level;

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

8. Limiting values

Table 5: 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

V

CC

I

IK

I

OK

I

O

, I

I

CC

T

stg

P

tot

[1]

supply voltage −0.5 +7 V
input diode current VI < −0.5 V or VI>VCC+ 0.5 V - ±20 mA
output diode current VO< −0.5 V or

output source or sink

V

O>VCC

VO = −0.5 V to VCC+ 0.5 V - ±25 mA

+ 0.5 V

- ±20 mA

current

GNDVCC

or GND current - ±50 mA
storage temperature −65 +150 °C
power dissipation

[1]

DIP14 package
SO14 and SSOP14

- 750 mW

[2]

- 500 mW

packages

[1] Above 70 °C: P
[2] Above 70 °C: P

9397 750 13806 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Product data sheet Rev. 03 — 12 November 2004 4 of 15

derates linearly with 12 mW/K.

tot

derates linearly with 8 mW/K.

tot

Philips Semiconductors

74HC21

Dual 4-input AND gate

9. Recommended operating conditions

Table 6: Recommended operating conditions

Symbol Parameter Conditions Min Typ Max Unit

V

CC

V

I

V

O

, t

t

r

f

T

amb

supply voltage 2.0 5.0 6.0 V
input voltage 0 - V
output voltage 0 - V
input rise and fall

times

VCC = 2.0 V - - 1000 ns

= 4.5 V - 6.0 500 ns

V

CC

= 6.0 V - - 400 ns

V

CC

CC
CC

V
V

ambient temperature −40 - +125 °C

10. Static characteristics

Table 7: Static characteristics

At recommended operating conditions; voltages are referenced to GND (ground = 0 V).

Symbol Parameter Conditions Min Typ Max Unit

=25°C

T

amb

V

IH

V

IL

V

OH

V

OL

I

LI

I

CC

C

I

HIGH-level input voltage VCC= 2.0 V 1.5 1.2 - V

= 4.5 V 3.15 2.4 - V

V

CC

= 6.0 V 4.2 3.2 - V

V

CC

LOW-level input voltage VCC= 2.0 V - 0.8 0.5 V

= 4.5 V - 2.1 1.35 V

V

CC

= 6.0 V - 2.8 1.8 V

V

CC

HIGH-level output voltage VI=VIHor V

IL

IO= −20 µA; VCC= 2.0 V 1.9 2.0 - V

= −20 µA; VCC= 4.5 V 4.4 4.5 - V

I

O

= −20 µA; VCC= 6.0 V 5.9 6.0 - V

I

O

= −4 mA; VCC= 4.5 V 3.98 4.32 - V

I

O

= −5.2 mA; VCC= 6.0 V 5.48 5.81 - V

I

O

LOW-level output voltage VI=VIHor V

IL

IO=20µA; VCC= 2.0 V - 0 0.1 V

=20µA; VCC= 4.5 V - 0 0.1 V

I

O

=20µA; VCC= 6.0 V - 0 0.1 V

I

O

= 4 mA; VCC= 4.5 V - 0.15 0.26 V

I

O

= 5.2 mA; VCC= 6.0 V - 0.16 0.26 V

I

O

input leakage current VI=VCCor GND; VCC= 6.0 V - - ±0.1 µA
quiescent supply current VI=VCCor GND; IO= 0 A; VCC= 6.0 V - - 2.0 µA
input capacitance - 3.5 - pF

9397 750 13806 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Product data sheet Rev. 03 — 12 November 2004 5 of 15