Datasheet

5
LOGIC-INPUT CMOS
QUAD DRIVERS
TC4467
TC4468
TC4469
Maximum operating temperature:
T
J
– θ
JA
(P
D
) = 141°C,
where: T
J
= Maximum allowable junction temperature
(+150°C)
θ
JA
= Junction-to-ambient thermal resistance
(83.3°C/W) 14-pin plastic package.
NOTE: Ambient operating temperature should not exceed +85°C for
"EJD" device or +125°C for "MJD" device.
Figure 1. Switching Time Test Circuit
V
OUT
1B
1A
2B
2A
3B
3A
4B
4A
1 µF FILM 0.1 µF CERAMIC
V
DD
470 pF
90%
10%
10%
10%
t
D1
t
R
t
D2
t
F
90%
+5V
INPUT
(A, B)
V
DD
OUTPUT
0V
0V
90%
1
2
3
4
5
6
8
9
7
10
11
12
13
14
Input: 100 kHz, square wave,
t
RISE
= t
FALL
≤ 10ns
Transition power dissipation arises in the
complementary configuration (TC446X) because the
output stage N-channel and P-channel MOS transistors
are ON simultaneously for a very short period when the
output changes. The transition power dissipation is
approximately:
P
T
= f V
S
(10 3 10
–9
).
Package power dissipation is the sum of load, quies-
cent and transition power dissipations. An example shows
the relative magnitude for each term:
C = 1000 pF capacitive load
V
S
= 15V
D = 50%
f = 200 kHz
P
D
= Package Power Dissipation = P
L
+ P
Q
+ P
T
= 45 mW + 35 mW + 30 mW = 110 mW.