HD74LS162A Datasheet, PDF (7/11 Pages) Hitachi Semiconductor – Synchronous Decade Counters(synchronous clear)

HD74LS162A
Waveforms 1
ƒ_max, t_PLH, t_PHL, (Clock→Q, Ripple Carry)
t_TLH
t_THL
Clock
10%
90% 90%
1.3V 1.3V _10%
1.3V
1.3V
3V
0V
(Measure at t_{w (CK)} ^tPHL
t_PLH
tn + 1)
(Measure at tn + 2)
V_OH
Q_A
1.3V
t_PHL
t_PLH (Measure at tn + 2)
V_OL
(Measure at tn + 4)
V_OH
Q_B
1.3V
1.3V
V_OL
t_PHL
t_PLH (Measure at tn + 4)
(Measure at tn + 8)
V_OH
Q_C
1.3V
1.3V
V_OL
t_PHL
t_PLH (Measure at tn + 8)
(Measure at
tn + 10)
V_OH
Q_D
1.3V
1.3V
V_OL
t_PLH
(Measure
tn +
at
9)
t_{PHL (Measure at tn + 10)}
V_OH
Ripple
Carry
1.3V
1.3V
V_OL
Note: Clock input pulse; t_TLH ≤ 15 ns, t_THL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%
and : ƒ_max t_TLH = t_THL ≤ 2.5 ns.
t_n is reference bit time when all outputs are low.
Rev.3.00, Jul.15.2005, page 7 of 10