HD74LS393 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – DUAL 4-BIT BINARY COUNTERS

HD74LS393
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol Inputs Outputs min. typ. max. Unit Condition
Maximum count frequency
ƒ_max
A
Q_A
25
35
—
MHz
Propagation delay time
t_PLH
t_PHL
A
—
12
20
Q_A
ns
—
13
20
C_L = 15 pF,
t_PLH
t_PHL
A
—
40
60
R_L = 2 kΩ
Q_D
ns
—
40
60
t_PHL
Clear
Any
—
24
39
ns
Note: Refer to Test Circuit and Waveform of the Common Item "TTL Common Matter (Document No.: REJ27D0005-
0100)".
Rev.2.00, Feb.18.2005, page 4 of 6