Absolute maximum ratings and operating conditions M74HC4851
8/16 Doc ID 8640 Rev 7
C
IN
Input
capacitance
(switches off,
any common
analog pins)
22 40 40 40 pF
C
PD
Power
dissipation
capacitance
(1)
3.3 24
pF
5.0 28
1. C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current
consumption without load (refer to Figure 5). The average operating current can be obtained by the following equation:
I
CC
(opr) = C
PD
x V
CC
x f
IN
+ I
CC
/8.
Table 7. AC electrical characteristics (C
L
= 50 pF, input t
r
= t
f
= 6 ns) (continued)
Symbol Parameter
Test condition Value
Unit
V
CC
(V)
Test circuit 1
T
A
= 25 °C Up to 85 °C Up to 125 °C
Min. Typ. Max. Min. Max. Min. Max.
Table 8. Injection current coupling specification (T
A
= -55°C to +125°C)
Symbol Parameter
Test condition Value
Unit
V
CC
(V)
Test circuit 2 Typ.
(1)
Max.
V
ΔOUT
Shift of output
voltage of
enabled
analog
channel
3.3
I
IN
≤
1 mA, R
S
≤
3.9 kΩ
0.050 1.0
mV
5.0 0.100 1.0
3.3
I
IN
≤ 10 mA, R
S
≤
3.9 kΩ
0.345 5.0
5.0 0.067 5.0
3.3
I
IN
≤
1 mA, R
S
≤
20 kΩ
0.050 2.0
5.0 0.110 2.0
3.3
I
IN
≤
10 mA, R
S
≤
20 kΩ
0.050 20
5.0 0.024 20
1. Typical values are measured at T
A
= 25 °C. They are calculated as the difference from V
OUT
without injection current and
V
OUT
with injection current. I
IN
= total current injected into any other disabled channels, one at time.
