HD74LS280 Datasheet, PDF (3/6 Pages) Hitachi Semiconductor – 9-bit Odd/Even Parity Generators/Checkers

HD74LS280
Electrical Characteristics
Item
Input voltage
Symbol
V_IH
V_IL
min.
2.0
—
typ.*
—
—
max.
—
0.8
Unit
V
V
V_OH
2.7
—
—
V
Output voltage
—
—
0.4
V_OL
V
—
—
0.5
I_IH
—
—
20
µA
Input current
I_IL
—
—
–0.4
mA
I_I
—
—
0.1
mA
Short-circuit output current
I_OS
–20
—
–100 mA
Supply current**
I_CC
—
16
27
mA
Input clamp voltage
V_IK
—
—
–1.5
V
Notes: * V_CC = 5 V, Ta = 25°C
** I_CC is measured with all outputs open and all inputs grounded.
(Ta = –20 to +75 °C)
Condition
V_CC = 4.75 V, V_IH = 2 V, V_IL = 0.8 V,
I_OH = –400 µA
I_OL = 4 mA V_CC = 4.75 V, V_IH = 2 V,
I_OL = 8 mA ^VIL ^{= 0.8 V}
V_CC = 5.25 V, V_I = 2.7 V
V_CC = 5.25 V, V_I = 0.4 V
V_CC = 5.25 V, V_I = 7 V
V_CC = 5.25 V
V_CC = 5.25 V
V_CC = 4.75 V, I_IN = –18 mA
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol Outputs min.
typ.
max.
Unit
Condition
Propagation delay time
t_PLH
—
Σ Even
33
50
ns
t_PHL
t_PLH
—
—
Σ Odd
29
23
45
45
ns
ns
C_L = 15 pF, R_L = 2 kΩ
t_PHL
—
31
50
ns
Rev.3.00, Jul.15.2005, page 3 of 5