HD74LS259 Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – 8-bit Addressable Latches

HD74LS259
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
P.G.
Zout = 50Ω
Input
V_CC Output
G
A
B
C
D
Clear
RL ^{Load circuit 1}
Q0
CL
Output
Q1
Same as Load Circuit 1.
Output
Q2
Same as Load Circuit 1.
Output
Q3
Same as Load Circuit 1.
Output
Q4
Same as Load Circuit 1.
Output
Q5
Same as Load Circuit 1.
Output
Q6
Same as Load Circuit 1.
Output
Q7
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 5 of 7