74HC21D
CMOS Digital Integrated Circuits
Silicon Monolithic
74HC21D
1. Functional Description
•
Dual 4-Input AND Gate
2. General
The 74HC21D is a high speed CMOS 4-INPUT AND GATE fabricated with silicon gate C
2
MOS technology.
It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power
dissipation.
The internal circuit is composed of 4 stages including buffer an output, which provide high noise immunity and
stable output.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
3. Features
(1)
(2)
(3)
(4)
High speed: t
pd
= 10 ns (typ.) at V
CC
= 5 V
Low power dissipation: I
CC
= 1.0
µA
(max) T
a
= 25
Balanced propagation delays: t
PLH
≈
t
PHL
Wide operating voltage range: V
CC(opr)
= 2.0 to 6.0 V
4. Packaging
SOIC14
Start of commercial production
©2016 Toshiba Corporation
1
2016-04
2016-05-24
Rev.2.0
74HC21D
5. Pin Assignment
6. Marking
7. IEC Logic Symbol
©2016 Toshiba Corporation
2
2016-05-24
Rev.2.0
74HC21D
8. Truth Table
A
L
X
X
X
H
B
X
L
X
X
H
C
X
X
L
X
H
D
X
X
X
L
H
Y
L
L
L
L
H
X:
Don't care
9. Absolute Maximum Ratings (Note)
Characteristics
Supply voltage
Input voltage
Output voltage
Input diode current
Output diode current
Output current
V
CC
/ground current
Power dissipation
Storage temperature
Symbol
V
CC
V
IN
V
OUT
I
IK
I
OK
I
OUT
I
CC
P
D
T
stg
Rating
-0.5 to 7.0
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±20
±20
±25
±50
500
-65 to 150
Unit
V
V
V
mA
mA
mA
mA
mW
Note:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even
destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even
if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum
ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report
and estimated failure rate, etc).
10. Operating Ranges (Note)
Characteristics
Supply voltage
Input voltage
Output voltage
Operating temperature
Input rise and fall times
Symbol
V
CC
V
IN
V
OUT
T
opr
t
r
,t
f
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
Test Condition
Rating
2.0 to 6.0
0 to V
CC
0 to V
CC
-40 to 85
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
ns
Note:
The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either V
CC
or GND.
©2016 Toshiba Corporation
3
2016-05-24
Rev.2.0
74HC21D
11. Electrical Characteristics
11.1. DC Characteristics (Unless otherwise specified, T
a
= 25
)
Characteristics
High-level input voltage
Symbol
V
IH
Test Condition
V
CC
(V)
2.0
4.5
6.0
Low-level input voltage
V
IL
2.0
4.5
6.0
High-level output voltage
V
OH
V
IN
= V
IH
I
OH
= -20
µA
2.0
4.5
6.0
I
OH
= -4 mA
I
OH
= -5.2 mA
Low-level output voltage
V
OL
V
IN
= V
IH
or V
IL
I
OL
= 20
µA
4.5
6.0
2.0
4.5
6.0
I
OL
= 4 mA
I
OL
= 5.2 mA
Input leakage current
Quiescent supply current
I
IN
I
CC
V
IN
= V
CC
or GND
V
IN
= V
CC
or GND
4.5
6.0
6.0
6.0
Min
1.50
3.15
4.20
1.9
4.4
5.9
4.18
5.68
Typ.
2.0
4.5
6.0
4.31
5.80
0.0
0.0
0.0
0.17
0.18
Max
0.50
1.35
1.80
0.1
0.1
0.1
0.26
0.26
±0.1
1.0
µA
µA
V
V
V
Unit
V
11.2. DC Characteristics (Unless otherwise specified, T
a
= -40 to 85
)
Characteristics
High-level input voltage
Symbol
V
IH
Test Condition
V
CC
(V)
2.0
4.5
6.0
Low-level input voltage
V
IL
2.0
4.5
6.0
High-level output voltage
V
OH
V
IN
= V
IH
I
OH
= -20
µA
2.0
4.5
6.0
I
OH
= -4 mA
I
OH
= -5.2 mA
Low-level output voltage
V
OL
V
IN
= V
IH
or V
IL
I
OL
= 20
µA
4.5
6.0
2.0
4.5
6.0
I
OL
= 4 mA
I
OL
= 5.2 mA
Input leakage current
Quiescent supply current
I
IN
I
CC
V
IN
= V
CC
or GND
V
IN
= V
CC
or GND
4.5
6.0
6.0
6.0
Min
1.50
3.15
4.20
1.9
4.4
5.9
4.13
5.63
Max
0.50
1.35
1.80
0.1
0.1
0.1
0.33
0.33
±1.0
10.0
µA
µA
V
V
V
Unit
V
©2016 Toshiba Corporation
4
2016-05-24
Rev.2.0
74HC21D
11.3. AC Characteristics
(Unless otherwise specified, C
L
= 15 pF, V
CC
= 5 V, T
a
= 25
, Input: t
r
= t
f
= 6 ns)
Characteristics
Output transition time
Propagation delay time
Symbol
t
TLH
,t
THL
t
PLH
,t
PHL
Test Condition
Min
Typ.
4
10
Max
8
17
Unit
ns
ns
11.4. AC Characteristics
(Unless otherwise specified, C
L
= 50 pF, T
a
= 25
, Input: t
r
= t
f
= 6 ns)
Characteristics
Output transition time
Symbol
t
TLH
,t
THL
Note
V
CC
(V)
2.0
4.5
6.0
Propagation delay time
t
PLH
,t
PHL
2.0
4.5
6.0
Input capacitance
Power dissipation capacitance
C
IN
C
PD
(Note 1)
Min
Typ.
30
8
7
40
13
11
5
25
Max
75
15
13
100
20
17
pF
pF
ns
Unit
ns
Note 1: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating current
consumption without load. Average operating current can be obtained by the equation.
I
CC(opr)
= C
PD
×
V
CC
×
f
IN
+ I
CC
/2 (per gate)
11.5. AC Characteristics
(Unless otherwise specified, C
L
= 50 pF, T
a
= -40 to 85
, Input: t
r
= t
f
= 6 ns)
Characteristics
Output transition time
Symbol
t
TLH
,t
THL
V
CC
(V)
2.0
4.5
6.0
Propagation delay time
t
PLH
,t
PHL
2.0
4.5
6.0
Min
Max
95
19
16
125
25
21
ns
Unit
ns
©2016 Toshiba Corporation
5
2016-05-24
Rev.2.0
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