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Rev.2.00, Oct 06, 2005 page 1 of 7
HD74HC42
BCD-to-Decimal Decoder REJ03D0546-0200
(Previous ADE-205-4 18)
Rev.2.00
Oct 06, 2005
Description
Data on the four input pins select one of the 10 outputs corresponding to the value of the BCD number on the inputs.
An output will go low whe n s elected, otherwise it remains high. If the input data is not a valid BCD number all outputs
will remain high.
Features
• High Speed Operation: tpd = 13 ns typ (CL = 50 pF)
• High O utput Current: Fa nout of 10 LSTTL Loa ds
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
• Ordering Info rmation
Part Name Package Type Package Code
(Previous Code) Package
Abbreviation Taping Abbreviation
(Quantity)
HD74HC42P DILP-16 pin PRDP0016AE-B
(DP-16FV) P —
HD74HC42FPEL SOP-16 pin (JEITA) PRSP0016DH-B
(FP-16DAV) FP EL (2,000 pcs/reel)
HD74HC42RPEL SOP-16 pin (JEDEC) PRSP0016DG-A
(FP-16DNV) RP EL (2,500 pcs/reel)
Note: Please consult the sales office for the above package availability.
Function Table
BCD Inputs Decimal Outputs
No. D C B A 0 1 2 3 4 5 6 7 8 9
0 L L L L L H H H H H H H H H
1 L L L H H L H H H H H H H H
2 L L H L H H L H H H H H H H
3 L L H H H H H L H H H H H H
4 L H L L H H H H L H H H H H
5 L H L H H H H H H L H H H H
6 L H H L H H H H H H L H H H
7 L H H H H H H H H H H L H H
8 H L L L H H H H H H H H L H
9 H L L H H H H H H H H H H L
INVALID H L H L H H H H H H H H H H
H L H H H H H H H H H H H H
H H L L H H H H H H H H H H
H H L H H H H H H H H H H H
H H H L H H H H H H H H H H
H H H H H H H H H H H H H H
H : High level
L : Low level
HD74HC42
Rev.2.00, Oct 06, 2005 page 2 of 7
Pin Arrangement
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
9
A
B
C
D
(Top view)
Outputs
Outputs Inputs
0Y
1Y
2Y
3Y
4Y
5Y
6Y
GND
16
15
14
13
12
11
10
9
V
CC
A
B
C
D
9Y
8Y
7Y
Logic Diagram
A
0Y
1Y
2Y
3Y
4Y
5Y
6Y
7Y
8Y
9Y
B
C
D
Absolute Maximum Ratings
Item Symbol Ratings Unit
Supply voltage range VCC –0.5 to 7.0 V
Input / Output voltage Vin, Vout –0.5 to VCC +0.5 V
Input / Output diode current IIK, IOK ±20 mA
Output current IO ±25 mA
VCC, GND current ICC or IGND ±50 mA
Power dissipation PT 500 mW
Storage temperature Tstg –65 to +150 °C
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
HD74HC42
Rev.2.00, Oct 06, 2005 page 3 of 7
Recommended Operating Conditions
Item Symbol Ratings Unit Conditions
Supply voltage VCC 2 to 6 V
Input / Output voltage VIN, VOUT 0 to VCC V
Operating temperature Ta –40 to 85 °C
0 to 1000 VCC = 2.0 V
0 to 500 VCC = 4.5 V
Input rise / fall time*1 t
r, tf 0 to 400 ns VCC = 6.0 V
Note: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Electrical Characteristics
Ta = 25°C Ta = –40 to+85°C
Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions
2.0 1.5 — — 1.5 —
4.5 3.15 — — 3.15 —
VIH
6.0 4.2 — — 4.2 —
V
2.0 — — 0.5 — 0.5
4.5 — — 1.35 — 1.35
Input voltage
VIL
6.0 — — 1.8 — 1.8
V
2.0 1.9 2.0 — 1.9 —
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
IOH = –20 µA
4.5 4.18 — — 4.13 — IOH = –4 mA
VOH
6.0 5.68 — — 5.63 —
V Vin = VIH or VIL
IOH = –5.2 mA
2.0 — 0.0 0.1 — 0.1
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
IOL = 20 µA
4.5 — — 0.26 — 0.33 IOL = 4 mA
Output voltage
VOL
6.0 — — 0.26 — 0.33
V Vin = VIH or VIL
IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent su pply
current ICC 6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C Ta = –40 to +85°C
Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions
2.0 — — 150 — 190
4.5 — 13 30 — 38
tPLH
6.0 — — 26 — 33
ns
2.0 — — 150 — 190
4.5 — 13 30 — 38
Propagation delay
time
tPHL
6.0 — — 26 — 33
ns
2.0 — — 75 — 95
4.5 — 5 15 — 19
Output rise time tTLH
6.0 — — 13 — 16
ns
2.0 — — 75 — 95
4.5 — 5 15 — 19
Output fall time tTHL
6.0 — — 13 — 16
ns
Input capacitan ce Cin — — 5 10 — 10 pF
HD74HC42
Rev.2.00, Oct 06, 2005 page 4 of 7
Test Circuit
L*
C includes the probe and fig capacitance.Note:
Measurement point
C
L
Waveforms
0 V
VCC
VOH
VOL
tPLH tPHL
10 %
90 %
50 %
50 % 50 %
50 %
10 %
90 %
trtf
tTHL
10 %
90 %
tTLH
10 %
90 %
VOH
VOL
50 % 50 %
tTHL
10 %
90 %
tTLH
10 %
90 %
tPHL tPLH
1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
Notes:
Input
Same-phase output
Inverse-phase output
HD74HC42
Rev.2.00, Oct 06, 2005 page 5 of 7
Package Dimensions
7.62
DP-16FV
RENESAS CodeJEITA Package Code Previous Code
MaxNomMin
Dimension in Millimeters
Symbol
Reference
19.2
6.3
5.06
MASS[Typ.]
1.05g
A
Z
b
D
E
A
b
c
θ
e
L
1
1
p
3
e
0.51
0.56
1.30
0.19 0.25 0.31
2.29 2.54 2.79
0
°
15
°
PRDP0016AE-BP-DIP16-6.3x19.2-2.54
20.32
7.4
0.40 0.48
1.12
2.54
1
p
1
3
1 8
16 9
e
b
A
LA
Z
e c
E
D
b
0.89
θ
( Ni/Pd/Au plating )
0.635
0.15
1.27
5.80 6.20
0.400.34
p
A
1
10.30
FP-16DNV
RENESAS CodeJEITA Package Code Previous Code
MaxNomMin
Dimension in Millimeters
Symbol
Reference
1.75
1.270.600.40
3.95
0.250.140.10
0.46
0.250.200.15
6.10
8
°
0
°
0.25
1.08
9.90
0.15g
MASS[Typ.]
1
E
1
1
2
L
Z
H
y
x
θ
c
b
A
E
D
b
c
e
e
L
A
P-SOP16-3.95x9.9-1.27 PRSP0016DG-A
Index mark
E
1
y
xM
p
*3
*2
*1
F
8
916
E
H
D
A
Zb
Terminal cross section
( Ni/Pd/Au plating )
p
b
c
Detail F
1
1
L
L
A
θ
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
HD74HC42
Rev.2.00, Oct 06, 2005 page 6 of 7
0.80
0.15
1.27
7.50 8.00
0.400.34
p
A
1
10.5
FP-16DAV
RENESAS CodeJEITA Package Code Previous Code
MaxNomMin
Dimension in Millimeters
Symbol
Reference
2.20
0.900.700.50
5.50
0.200.100.00
0.46
0.250.200.15
7.80
8
°
0
°
0.12
1.15
10.06
0.24g
MASS[Typ.]
1
E
1
1
2
L
Z
H
y
x
θ
c
b
A
E
D
b
c
e
L
A
P-SOP16-5.5x10.06-1.27 PRSP0016DH-B
*1
*2
E
81
16 9
xM
p
*3
y
F
Index mark
b
D
E
H
Z
A
Terminal cross section
( Ni/Pd/Au plating )
p
c
b
1
1
Detail F
L
L
A
θ
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
e
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