Rev.3.00, Jul.13.2005, page 1 of 5
HD74LS145
BCD-to-Decimal Decoder / Driver (with 15 V outputs) REJ03D0436–0300
Rev.3.00
Jul.13.2005
This BCD-to-decimal decoder / driver consists of eight inverters and ten four-input NAND gates. The inverters are
connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of valid BCD
input logic ensures that all outputs remain off for all invalid binary input conditions. This decoder features high-
performance, n-p-n output transistors designed for use as indicator / relay drivers or as open-collector logic-circuit
drivers.
Features
• Ordering Information
Part Name Package Type Package Code
(Previous Code) Package
Abbreviation Taping Abbreviation
(Quantity)
HD74LS145P DILP-16 pin PRDP0016AE-B
(DP-16FV) P —
HD74LS145FPEL SOP-16 pin (JEITA) PRSP0016DH-B
(FP-16DAV) FP EL (2,000 pcs/reel)
Note: Please consult the sales office for the above packa ge availability.
Pin Arrangement
(Top view)
V
CC
GND
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
A
B
D
C
Y
9
Y
8
Y
7
15
161
2
3
4
5
6
7
14
89
10
11
12
13
1
2
6
5
4
3
9
0
8
7
A
B
C
D
Outputs
Outputs
Inputs
HD74LS145
Rev.3.00, Jul.13.2005, page 2 of 5
Function Table
Inputs Outputs
No. D C B A 0 1 2 3 4 5 6 7 8 9
L L L L L H H H H H H H H H
L L L H H L H H H H H H H H
L L H L H H L H H H H H H H
L L H H H H H L H H H H H H
0
1
2
3
4 L H L L H H H H L H H H H H
L H L H H H H H H L H H H H
L H H L H H H H H H L H H H
L H H H H H H H H H H L H H
H L L L H H H H H H H H L H
5
6
7
8
9 H L L H H H H H H H H H H L
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
Invalid
H H H H H H H H H H H H H H
Block Diagram
Inputs
A
B
C
D
Outputs
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
Y
8
Y
9
Absolute Maximum Ratings
Item Symbol Ratings Unit
Supply voltage VCC 7 V
Input voltage VIN 7 V
Power dissipation PT 400 mW
Storage temperature Tstg –65 to +150 °C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
HD74LS145
Rev.3.00, Jul.13.2005, page 3 of 5
Recommended Operating Conditions
Item Symbol Min Typ Max Unit
Supply voltage VCC 4.75 5.00 5.25 V
Off-state output voltage VO(off) — — 15 V
Low level output current IOL — — 80 mA
Operating temperature Topr –20 25 75 °C
Electrical Characteristics
(Ta = –20 to +75 °C)
Item Symbol min. typ.* max. Unit Condition
VIH 2.0 — — V
Input voltage VIL — — 0.8 V
Off-state output
current IO(off) — — 250 µA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
VO(off) = 15 V
— — 0.4 IOL = 12 mA
— — 0.5 IOL = 24 mA
On-state output
voltage VO(on) — — 3.0 V IOL = 80 mA
VCC = 4.75 V, VIH = 2 V,
VIL = 0.8 V
IIH — — 20 µA VCC = 5.25 V, VI = 2.7 V
IIL — — –0.4 mA VCC = 5.25 V, VI = 0.4 V
Input current II — — 0.1 mA VCC = 5.25 V, VI = 7 V
Supply current** ICC — 7 13 mA VCC = 5.25 V
Input clamp voltage VIK — — –1.5 V VCC = 4.75 V, IIN = –18 mA
Notes: * VCC = 5 V, Ta = 25°C
** ICC is measured with all outputs open and all inputs grounded.
Switching Characteristics
(VCC = 5 V, Ta = 25°C)
Item Symbol min. typ. max. Unit Condition
tPLH — — 50
Propagation delay time tPHL — — 50 ns CL = 45 pF, RL = 665 Ω
HD74LS145
Rev.3.00, Jul.13.2005, page 4 of 5
Testing Method
Test Circuit
4.5V 0
1
2
3
4
5
6
7
8
9
A
B
C
D
Input
P.G.
Zout = 50Ω
See Testing Table
Output
VCC
RL
CL
Waveform
t
PLH
t
PHL
V
OH
V
OL
0 V
3 V
V
OH
V
OL
t
PHL
t
PLH
10%
90%
1.3 V
1.3 V 1.3 V
1.3 V 1.3 V
1.3 V
10%
90%
Input
In phase output
Out of phase output
t
TLH
t
THL
Note: Input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%
HD74LS145
Rev.3.00, Jul.13.2005, page 5 of 5
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 )
0.80
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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