HD74LS283 Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – 4-bit Binary Full Adders

HD74LS283
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
V_CC Output
RL ^{Load circuit 1}
C4
CL
A4
B4
Output
A3
Σ4
Same as Load Circuit 1.
B3
Output
A2
Σ3
Same as Load Circuit 1.
B2
Output
A1
Σ2
Same as Load Circuit 1.
B1
Output
C0
Σ1
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
Notes: Input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%.
Rev.3.00, Jul.15.2005, page 5 of 7