HD74LS42 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – BCD-to-Decimal Decoder

HD74LS42
Testing Method
Test Circuit
V_CC
4.5V
P.G.
Zout = 50Ω
Input
0
1
A
2
3
B
4
C
5
6
D
7
8
9
RL
Output
CL
Notes: 1. All diodes are 1S2074(H).
2. C_L includes probe and jig capacitance.
Waveform
t_TLH
t_THL
90%
90%
3V
Input
1.3 V
1.3 V
10%
10%
0V
t_PLH
t_PHL
In phase output
1.3 V
t_PHL
1.3 V
t_PLH
V_OH
V_OL
Out of phase output
1.3 V
V_OH
1.3 V
V_OL
Note: Input pulse: t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%.
Rev.3.00, Jul.22.2005, page 4 of 6