HD74LS138_15 Datasheet, PDF (6/10 Pages) Renesas Technology Corp – 3-Line-to-8-Line Decoders / Demultiplexers

HD74LS138
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
V_CC Output
RL ^{Load circuit 1}
Y0
CL
A
Output
B
C
Y1
Same as Load Circuit 1.
Output
Y2
Same as Load Circuit 1.
G1
Output
G2A
Y3
Same as Load Circuit 1.
G2B
Output
Y4
Same as Load Circuit 1.
Output
Y5
Same as Load Circuit 1.
Output
Y6
Same as Load Circuit 1.
Output
Y7
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.3.00, Jul.13.2005, page 4 of 7