HD74LS258 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – Quadruple 2-line-to-1-line Data Selectors/Multiplexers(with three-state outputs)

HD74LS258
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
V_{CC Output}
RL ^{Load circuit 1}
S1
1Y
1A
5kΩ
1B
S2
2A
CL
2B
3A
Output
3B
4A
2Y
Same as Load Circuit 1.
4B
Output
G
3Y
Same as Load Circuit 1.
S
Output
4Y
Same as Load Circuit 1.
Notes: 1. C_L includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Waveforms 1
t_TLH
t_THL
90%
90%
3V
Input
1.3 V
1.3 V
10%
10%
0V
t_PLH
t_PHL
V_OH
Waveform A S1 and
1.3 V
1.3 V
S2 closed
V_OL
t_PHL
t_PLH
Waveform B
S1 and
S2 closed
1.3 V
1.3 V
V_OH
V_OL
Note: Input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, duty cycle = 50%
Rev.3.00, Jul.15.2005, page 4 of 6