HD74LS139 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – Dual 2-line-to-4-line Decoders/Demultiplexers

HD74LS139
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
V_CC Output
RL ^{Load circuit 1}
1Y0
CL
1G
Output
2G
1Y1
Same as Load Circuit 1.
1A
Output
1B
1Y2
Same as Load Circuit 1.
Output
2A
1Y3
Same as Load Circuit 1.
2B
Output
2Y0
Same as Load Circuit 1.
Output
2Y1
Same as Load Circuit 1.
Output
2Y2
Same as Load Circuit 1.
Output
2Y3
Same as Load Circuit 1.
Notes: 1. C_L includes probe and jig capacitance.
2. All diodes are 1S2074(H).
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.2.00, Feb.18.2005, page 4 of 6