82C82_02 Datasheet, PDF (3/7 Pages) Intersil Corporation – CMOS Octal Latching Bus Driver

82C82
Application Information
Decoupling Capacitors
The transient current required to charge and discharge the
300pF load capacitance specified in the 82C82 data sheet is
determined by:
I = C_L(dv/dt)
(EQ. 1)
Assuming that all outputs change state at the same time and
that dv/dt is constant;
I = C_L
(_---V_{----C-----Ct-R----}x_-/-t--F-8_---0_---%_-------)
(EQ. 2)
(EQ. 3)
where tR = 20ns, V_CC = 5.0V, C_L = 300pF on each of eight
outputs.
I = (8 x 300 x 10^-12)x (5.0V x 0.8)/(20 x 10^–9) = 480mA ^{(EQ. 4)}
V_CC
V_CC
ALE
MULTIPLEXED
BUS
ICC
ADDRESS
ADDRESS
STB
DATA IN
P
P
N
P
INTERNAL
DATA
N
N
Absolute Maximum Ratings
FIGURE 18. SYSTEM EFFECTS OF GATED INPUTS
Thermal Information
276