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74HC20; 74HCT20
Dual 4-input NAND gate
Rev. 4 — 18 November 2015
Product data sheet
1. General description
The 74HC20; 74HCT20 is a dual 4-input NAND gate. Inputs include clamp diodes. This
enables the use of current limiting resistors to interface inputs to voltages in excess of
VCC.
2. Features and benefits
Complies with JEDEC standard JESD7A
Low-power dissipation
Input levels:
For 74HC20: CMOS level
For 74HCT20: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 C to +80 C and from 40 C to +125 C.
3. Ordering information
Table 1.
Ordering information
Type number
74HC20D
Package
Temperature range
Name
Description
Version
40 C to +125 C
SO14
plastic small outline package; 14 leads; body width
3.9 mm
SOT108-1
40 C to +125 C
SSOP14
plastic shrink small outline package; 14 leads; body
width 5.3 mm
SOT337-1
40 C to +125 C
TSSOP14
plastic thin shrink small outline package; 14 leads;
body width 4.4 mm
SOT402-1
74HCT20D
74HC20DB
74HCT20DB
74HC20PW
74HCT20PW
74HC20; 74HCT20
NXP Semiconductors
Dual 4-input NAND gate
4. Functional diagram
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Fig 1.
Functional diagram
Fig 2.
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Logic symbol
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Fig 3.
DDD
IEC Logic symbol
Fig 4.
Logic diagram
5. Pinning information
5.1 Pinning
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Fig 5.
Pin configuration SOT108-1
74HC_HCT20
Product data sheet
DDD
Fig 6.
Pin configuration SOT337-1 and SOT402-1
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 18 November 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
2 of 15
74HC20; 74HCT20
NXP Semiconductors
Dual 4-input NAND gate
5.2 Pin description
Table 2.
Pin description
Symbol
Pin
Description
1A, 1B, 1C, 1D
1, 2, 4, 5
data input
n.c.
3, 11
not connected
1Y
6
data output
GND
7
ground (0 V)
2Y
8
data output
2A, 2B, 2C, 2D
9, 10, 12, 13
data input
VCC
14
supply voltage
6. Functional description
Table 3.
Function table[1]
Input
Output
nA
nB
nC
nD
nY
L
X
X
X
H
X
L
X
X
H
X
X
L
X
H
X
X
X
L
H
H
H
H
H
L
[1]
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
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
-
500
mW
total power dissipation
Ptot
SO14, and (T)SSOP14 packages
[2]
[1]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2]
For SO14 package: Ptot derates linearly with 8 mW/K above 70 C.
For (T)SSOP14 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
74HC_HCT20
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 18 November 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
3 of 15
74HC20; 74HCT20
NXP Semiconductors
Dual 4-input NAND gate
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
Conditions
74HC20
Min
Typ
74HCT20
Max
Min
Typ
Unit
Max
VCC
supply voltage
2.0
5.0
6.0
4.5
5.0
5.5
V
VI
input voltage
0
-
VCC
0
-
VCC
V
VO
output voltage
0
-
VCC
0
-
VCC
V
Tamb
ambient temperature
40
+25
+125
40
+25
+125
C
t/V
input transition rise and fall rate
VCC = 2.0 V
-
-
625
-
-
-
ns/V
VCC = 4.5 V
-
1.67
139
-
1.67
139
ns/V
VCC = 6.0 V
-
-
83
-
-
-
ns/V
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
VCC = 2.0 V
1.5
1.2
-
1.5
-
1.5
-
V
VCC = 4.5 V
3.15
2.4
-
3.15
-
3.15
-
V
VCC = 6.0 V
4.2
3.2
-
4.2
-
4.2
-
V
VCC = 2.0 V
-
0.8
0.5
-
0.5
-
0.5
V
VCC = 4.5 V
-
2.1
1.35
-
1.35
-
1.35
V
VCC = 6.0 V
-
2.8
1.8
-
1.8
-
1.8
V
IO = 20 A; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = 20 A; VCC = 4.5 V
4.4
4.5
-
4.4
-
4.4
-
V
IO = 20 A; VCC = 6.0 V
5.9
6.0
-
5.9
-
5.9
-
V
IO = 4.0 mA; VCC = 4.5 V
3.98
4.32
-
3.84
-
3.7
-
V
IO = 5.2 mA; VCC = 6.0 V
5.48
5.81
-
5.34
-
5.2
-
V
IO = 20 A; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 20 A; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 20 A; VCC = 6.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 4.0 mA; VCC = 4.5 V
-
0.15
0.26
-
0.33
-
0.4
V
IO = 5.2 mA; VCC = 6.0 V
-
0.16
0.26
-
0.33
-
0.4
V
74HC20
VIH
VIL
VOH
VOL
HIGH-level
input voltage
LOW-level
input voltage
HIGH-level
output voltage
LOW-level
output voltage
VI = VIH or VIL
VI = VIH or VIL
II
input leakage
current
VI = VCC or GND;
VCC = 6.0 V
-
-
0.1
-
1
-
1
A
ICC
supply current
VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
-
-
2
-
20
-
40
A
74HC_HCT20
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 18 November 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
4 of 15
74HC20; 74HCT20
NXP Semiconductors
Dual 4-input NAND gate
Table 6.
Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
CI
25 C
Conditions
input
capacitance
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
-
3.5
-
-
-
-
-
pF
74HCT20
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
2.0
1.6
-
2.0
-
2.0
-
V
VIL
LOW-level
input voltage
VCC = 4.5 V to 5.5 V
-
1.2
0.8
-
0.8
-
0.8
V
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 A
4.4
4.5
-
4.4
-
4.4
-
V
IO = 4.0 mA
3.98
4.32
-
3.84
-
3.7
-
V
LOW-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 A
-
0
0.1
-
0.1
-
0.1
V
IO = 5.2 mA
-
0.15
0.26
-
0.33
-
0.4
V
VOL
II
input leakage
current
VI = VCC or GND;
VCC = 5.5 V
-
-
0.1
-
1
-
1
A
ICC
supply current
VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
2
-
20
-
40
A
ICC
additional
supply current
per input pin;
VI = VCC 2.1 V; IO = 0 A;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V
-
30
108
-
135
-
147
A
CI
input
capacitance
-
3.5
-
-
-
-
-
pF
74HC_HCT20
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 18 November 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
5 of 15
74HC20; 74HCT20
NXP Semiconductors
Dual 4-input NAND gate
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; CL = 50 pF; for test circuit see Figure 8.
Symbol Parameter
25 C
Conditions
40 C to +125 C Unit
Min
Typ
Max
Max
(85 C)
Max
(125 C)
74HC20
propagation delay nA, nB, nC or nD to nY;
see Figure 7
tpd
[1]
VCC = 2.0 V
-
28
90
115
135
ns
VCC = 4.5 V
-
10
18
23
27
ns
VCC = 6.0 V
-
8
15
20
23
ns
-
8
-
-
-
ns
VCC = 2.0 V
-
19
75
95
110
ns
VCC = 4.5 V
-
7
15
19
22
ns
-
6
13
16
19
ns
-
22
-
-
-
pF
-
16
28
35
42
ns
VCC = 5.0 V; CL = 15 pF
transition time
tt
[2]
see Figure 7
VCC = 6.0 V
power dissipation
capacitance
CPD
per package; VI = GND to VCC
[3]
74HCT20
tpd
propagation delay nA, nB, nC or nD to nY;
see Figure 7
[1]
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
transition time
tt
power dissipation
capacitance
CPD
[1]
-
13
-
-
-
ns
VCC = 4.5 V; see Figure 7
[2]
-
7
15
19
22
ns
per package;
VI = GND to VCC 1.5 V
[3]
-
17
-
-
-
pF
tpd is the same as tPHL and tPLH.
[2]
tt is the same as tTHL and tTLH.
[3]
CPD is used to determine the dynamic power dissipation (PD in W):
PD = CPD VCC2 fi N + (CL VCC2 fo) where:
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 VCC2 fo) = sum of outputs.
74HC_HCT20
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 18 November 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
6 of 15
74HC20; 74HCT20
NXP Semiconductors
Dual 4-input NAND gate
11. Waveforms
9,
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Q'LQSXW
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