HD74LV161A Datasheet, PDF (9/19 Pages) Hitachi Semiconductor – Synchronous 4-bit Binary Counter (Direct Clear)

HD74LV161A
Switching Characteristics (cont)
• V_CC = 3.3 ± 0.3 V
Ta = 25°C
Ta = –40 to 85°C
Item
Symbol Min Typ Max Min
Maximum fmax 80 130 — 70
clock
frequency
55 85 — 50
Propa-
gation
t_PLH/t_PHL —
delay time
8.3 12.8 1.0
— 10.8 16.3 1.0
t_PLH/t_PHL —
Count —
mode
8.7 13.6 1.0
11.2 17.1 1.0
t_PLH/t_PHL —
Load
—
mode
11.0 17.2 1.0
13.5 20.7 1.0
t_PLH/t_PHL —
—
7.5 12.3 1.0
10.5 15.8 1.0
t_PHL
— 8.9 13.6 1.0
— 11.2 17.1 1.0
t_PHL
— 8.4 13.2 1.0
— 10.9 16.7 1.0
Setup time t_su
5.5 — — 6.5
8.0 — — 9.5
7.5 — — 9.0
Max
—
—
15.0
18.5
16.0
19.5
20.0
23.5
14.5
18.0
16.0
19.5
15.5
19.0
—
—
—
Unit
MHz
ns
ns
2.5 — — 2.5
—
Hold time t_h
Pulse
t_w
width
1.0 — — 1.0
—
ns
5.0 — — 5.0
—
ns
5.0 — — 5.0
—
Test Conditions
C_L = 15 pF
C_L = 50 pF
C_L = 15 pF
C_L = 50 pF
C_L = 15 pF
C_L = 50 pF
C_L = 15 pF
C_L = 50 pF
C_L = 15 pF
C_L = 50 pF
C_L = 15 pF
C_L = 50 pF
C_L = 15 pF
C_L = 50 pF
FROM
(Input)
TO
(Output)
CLK
Q
CLK
Carry
CLK
Carry
ENT
Carry
CLR
Q
CLR
Carry
Data before CLK ↑
LOAD before CLK ↑
ENT, ENP before CLK
↑
CLR inactive before
CLK ↑
CLK H or L
CLR L
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