74HC21
Dual 4-input AND gate
Rev. 05 — 7 May 2009
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 provide the 4-input AND function.
2. Features
I
Low-power dissipation
I
Complies with JEDEC standard no. 7A
I
ESD protection:
N
HBM JESD22-A114E exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
I
Multiple package options
I
Specified from
−40 °C
to +80
°C
and from
−40 °C
to +125
°C.
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74HC21N
74HC21D
74HC21DB
74HC21PW
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
Name
DIP14
SO14
SSOP14
TSSOP14
Description
plastic dual in-line package; 14 leads (300 mil)
plastic small outline package; 14 leads;
body width 3.9 mm
plastic shrink small outline package; 14 leads;
body width 5.3 mm
plastic thin shrink small outline package; 14 leads;
body width 4.4 mm
Version
SOT27-1
SOT108-1
SOT337-1
SOT402-1
Type number
NXP Semiconductors
74HC21
Dual 4-input AND gate
4. Functional diagram
1
2
4
5
9
10
12
13
1A
1B
1C
1D
2A
2B
2C
2D
001aab975
1Y
1
6
2
4
5
9
8
10
12
13
1A
1B
1C
1D
2A
2B
2C
2D
001aab973
1Y
6
2Y
2Y
8
Fig 1.
Functional diagram
Fig 2.
Logic symbol
1
2
4
5
&
6
A
B
9
10
12
13
001aab974
&
8
Y
C
D
001aab976
Fig 3.
IEC Logic symbol
Fig 4.
Logic diagram
5. Pinning information
5.1 Pinning
74HC21
1A
1B
n.c.
1C
1D
1Y
GND
1
2
3
4
5
6
7
001aab972
14 V
CC
13 2D
12 2C
11 n.c.
10 2B
9
8
2A
2Y
1A
1B
n.c.
1C
1D
1Y
GND
1
2
3
4
5
6
7
001aai659
74HC21
14 V
CC
13 2D
12 2C
11 n.c.
10 2B
9
8
2A
2Y
Fig 5.
Pin configuration SOT27-1 and SOT108-1
Fig 6.
Pin configuration SOT337-1 and SOT402-1
74HC21_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 7 May 2009
2 of 14
NXP Semiconductors
74HC21
Dual 4-input AND gate
5.2 Pin description
Table 2.
Symbol
1A, 1B, 1C, 1D
n.c.
1Y
GND
2Y
2A, 2B, 2C, 2D
V
CC
Pin description
Pin
1, 2, 4, 5
3, 11
6
7
8
9, 10, 12, 13
14
Description
data input
not connected
data output
ground (0 V)
data output
data input
supply voltage
6. Functional description
Table 3.
Input
nA
L
X
X
X
H
[1]
Function table
[1]
Output
nB
X
L
X
X
H
nC
X
X
L
X
H
nD
X
X
X
L
H
nY
L
L
L
L
H
H = HIGH voltage level; L = LOW voltage level; X = don’t care.
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
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
DIP14 package
SO14 and (T)SSOP14
packages
[1]
[2]
[2]
Conditions
V
I
<
−0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
−0.5
V or V
O
> V
CC
+ 0.5 V
−0.5
V < V
O
< V
CC
+ 0.5 V
[1]
[1]
Min
−0.5
-
-
-
-
−50
−65
-
-
Max
+7
±20
±20
±25
50
-
+150
750
500
Unit
V
mA
mA
mA
mA
mA
°C
mW
mW
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For DIP14 package: P
tot
derates linearly with 12 mW/K above 70
°C.
For SO14 package: P
tot
derates linearly with 8 mW/K above 70
°C.
For (T)SSOP14 packages: P
tot
derates linearly with 5.5 mW/K above 60
°C.
© NXP B.V. 2009. All rights reserved.
74HC21_5
Product data sheet
Rev. 05 — 7 May 2009
3 of 14
NXP Semiconductors
74HC21
Dual 4-input AND gate
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol
V
CC
V
I
V
O
∆t/∆V
Parameter
supply voltage
input voltage
output voltage
input transition rise and fall
rate
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
T
amb
ambient temperature
Conditions
Min
2.0
0
0
-
-
-
−40
Typ
5.0
-
-
-
1.67
-
-
Max
6.0
V
CC
V
CC
625
139
83
+125
Unit
V
V
V
ns/V
ns/V
ns/V
°C
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
IH
HIGH-level
input voltage
Conditions
Min
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level
input voltage
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level
output voltage
V
I
= V
IH
or V
IL
I
O
=
−20 µA;
V
CC
= 2.0 V
I
O
=
−20 µA;
V
CC
= 4.5 V
I
O
=
−20 µA;
V
CC
= 6.0 V
I
O
=
−4.0
mA; V
CC
= 4.5 V
I
O
=
−5.2
mA; V
CC
= 6.0 V
V
OL
LOW-level
output voltage
V
I
= V
IH
or V
IL
I
O
= 20
µA;
V
CC
= 2.0 V
I
O
= 20
µA;
V
CC
= 4.5 V
I
O
= 20
µA;
V
CC
= 6.0 V
I
O
= 4.0 mA; V
CC
= 4.5 V
I
O
= 5.2 mA; V
CC
= 6.0 V
I
I
I
CC
C
I
input leakage
current
supply current
input
capacitance
V
I
= V
CC
or GND;
V
CC
= 6.0 V
V
I
= V
CC
or GND; I
O
= 0 A;
V
CC
= 6.0 V
-
-
-
-
-
-
-
-
0
0
0
0.15
0.16
-
-
3.5
0.1
0.1
0.1
0.26
0.26
±0.1
2.0
-
-
-
-
-
-
-
-
-
0.1
0.1
0.1
0.33
0.33
±1
20
-
-
-
-
-
-
-
-
-
0.1
0.1
0.1
0.4
0.4
±1
40
-
V
V
V
V
V
µA
µA
pF
1.9
4.4
5.9
3.98
5.48
2.0
4.5
6.0
4.32
5.81
-
-
-
-
-
1.9
4.4
5.9
3.84
5.34
-
-
-
-
-
1.9
4.4
5.9
3.7
5.2
-
-
-
-
-
V
V
V
V
V
1.5
3.15
4.2
-
-
-
25
°C
Typ
1.2
2.4
3.2
0.8
2.1
2.8
Max
-
-
-
0.5
1.35
1.8
−40 °C
to +85
°C −40 °C
to +125
°C
Unit
Min
1.5
3.15
4.2
-
-
-
Max
-
-
-
0.5
1.35
1.8
Min
1.5
3.15
4.2
-
-
-
Max
-
-
-
0.5
1.35
1.8
V
V
V
V
V
V
74HC21_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 7 May 2009
4 of 14
NXP Semiconductors
74HC21
Dual 4-input AND gate
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; test circuit see
Figure 8.
Symbol Parameter
t
pd
propagation
delay
Conditions
Min
nA, nB, nC or nD to nY;
see
Figure 7
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
CC
= 5.0 V; C
L
= 15 pF
t
t
transition time
nY output; see
Figure 7
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
C
PD
power
dissipation
capacitance
V
I
= GND to V
CC
[3]
[2]
[1]
25
°C
Typ
Max
−40 °C
to +85
°C
Min
Max
−40 °C
to +125
°C
Unit
Min
Max
-
-
-
-
-
-
-
-
33
12
10
10
19
7
6
15
110
22
19
-
75
15
13
-
-
-
-
-
-
-
-
-
140
28
24
-
95
19
16
-
-
-
-
-
-
-
-
-
165
33
28
-
110
22
19
-
ns
ns
ns
ns
ns
ns
ns
pF
[1]
[2]
[3]
t
pd
is the same as t
PHL
and t
PLH
.
t
t
is the same as t
THL
and t
TLH
.
C
PD
is used to determine the dynamic power dissipation (P
D
in
µW):
P
D
= C
PD
×
V
CC2
×
f
i
×
N +
∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in V;
N = number of inputs switching;
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs.
74HC21_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 7 May 2009
5 of 14
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