HCF4510B Datasheet, PDF (6/12 Pages) STMicroelectronics – PRESETTABLE UP/DOWN COUNTERS

HCF4510B/4515B
DYNAMIC ELECTRICAL CHARACTERISTICS (T_amb = 25 ^oC, C_L = 50 pF, R_L = 200 KΩ,
typical temperaturecoefficent for all VDD values is 03 %/^oC, all input rise and fall times= 20 ns)
Symb ol
P a ramet er
Test Conditions
Value
Un it
V_DD Min. Typ. Max.
(V)
t_PHL Propagation Delay Time Clock to Q Output
t_PLH
5
200 400
10
100 200
ns
15
75 150
t_PHL Propagation Delay Time Preset or Reset to
t_PLH Q Output
5
210 420
10
105 210 ^ns
15
80 160
t_PHL Propagation Delay Time Clock to Carry Out
t_PLH
5
240 480
10
120 240 ^ns
15
90 180
t_PHL Propagation Delay Time Carry In to Carry
t_PLH Out
5
125 250
10
60 120
ns
15
50 100
tPHL Propagation Delay Time Preset or Reset to
t_PLH Carry Out
5
320 640
10
160 320 ^ns
15
125 250
t_THL Transition Time
t_TLH
5
100 200
10
50 100 ^ns
15
40 80
f_MAX Max Clock Frequency
5
2
4
10
4
8
MHz
15
5.5
11
tW Clock Pulse Width
5
150
10
75
ns
15
60
Preset Enable or Reset Removal Time (1)
5
150
10
80
ns
15
60
t_r, t_f Clock Rise and Fall Time (2)
5
15
10
5
µs
15
5
t_setup Carry In Setup Time
5
130
10
60
ns
15
45
t_setup Up Down Setup Time
5
360
10 160
ns
15 110
t_W Preset Enable or Reset Pulse Width
5
220
10 100
ns
15
75
(1) Timerequired after the falling edge of the reset or preset enable inuts before the rising edge ofthe clock will trigger the counter (similar to setup time).
(2) Ifmore than unit is cascated in the parallel clocked application, trCL should be made less than or equal to the sum of the fixed propagation delay at
15pF and the transition timeof the carry output driving stage ofthe estimated capacitive load.
6/12