NXP Semiconductors UM10204 - 7.4 Input leakage

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User manual Rev. 5 — 9 October 2012 59 of 64
NXP Semiconductors
UM10204
I
2
C-bus specification and user manual
7.4 Input leakage
The maximum HIGH level input current of each input/output connection has a specified
maximum value of 10 μA. Due to the required noise margin of 0.2V
DD
for the HIGH level,
this input current limits the maximum value of R
p
. This limit depends on V
DD
. The total
HIGH-level input current is shown as a function of R
p(max)
in Figure 47.
Fig 46. Maximum value of R
s
as a function of the value of R
p
with supply voltage as a
parameter
0 400 800 1600
10
0
8
mbc629
1200
6
4
2
maximum value R
s
(Ω)
15 V
10 V
R
p
(kΩ)
V
DD
= 2.5 V
5 V
Fig 47. Total HIGH-level input current as a function of the maximum value of R
p
with
supply voltage as a parameter
0 200
20
0
4
mbc630
8
12
16
40 80 120 160
total high level input current (μA)
maximum
value R
p
(k )Ω
5 V
V
DD
= 15 V
2.5 V
10 V