HD74LS390 Datasheet, PDF (4/6 Pages) Hitachi Semiconductor – Dual Decade Counters

HD74LS390
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol min. typ.* max. Unit
Condition
Input voltage
Output voltage
Clear
V_IH
2.0
—
—
V
V_IL
—
—
0.7
V
V_OH
2.7
—
—
V
V_CC = 4.75 V, V_IH = 2 V, V_IL = 0.7 V,
I_OH = –400 µA
V_OL
—
—
0.4
V
I_OL = 4 mA V_CC = 4.75 V,
—
—
0.5
I_OL = 8 mA ^VIH ^{= 2 V, V}IL ^{= 0.7 V}
—
—
20
Input A
Input B
I_IH
—
—
100
µA V_CC = 5.25 V, V_I = 2.7 V
—
—
200
Input
current
Clear
Input A
Input B
—
—
–0.4
I_IL
—
—
–1.6
mA V_CC = 5.25 V, V_I = 0.4 V
—
—
–2.4
Clear
Input A
Input B
—
—
0.1
V_I = 7 V
I_I
—
—
—
—
0.2
0.4
mA
V_I = 5.5 V ^{VCC = 5.25 V}
Short-circuit output current
I_OS
–20
—
–100
mA V_CC = 5.25 V
Supply current
I_CC
—
15
26
mA V_CC = 5.25 V
Input clamp voltage
V_IK
—
—
–1.5
V
V_CC = 4.75 V, I_IN = –18 mA
Notes: * V_CC = 5 V, Ta = 25°C
** I_CC is measured with all outputs open, both Clear inputs grounded following momentary connection to 4.5 V,
and all other inputs grounded.
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol Inputs Outputs
min.
typ.
max.
Unit
Condition
Maximum count
A
frequency
ƒ_max
B
Q_A
25
35
—
MHz
Q_B
20
30
—
t_PLH
A
t_PHL
Q_A
—
12
20
ns
—
13
20
t_PLH
A
t_PHL
Propagation delay
t_PLH
B
time
t_PHL
Q_C
Q_B
—
37
60
ns
—
39
60
—
13
21
C_L = 15 pF,
ns
R_L = 2 kΩ
—
14
21
t_PLH
B
t_PHL
Q_C
—
24
39
ns
—
26
39
t_PLH
B
t_PHL
Q_D
—
13
21
ns
—
14
21
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.4.00, May 10, 2006, page 4 of 5