si8405 Silicon Laboratories, si8405 Datasheet - Page 6

• Manufacturer Part Number: si8405
• Description: Bidirectional I 2c Isolators With Unidirectional Digital Channels
• Manufacturer: Silicon Laboratories

Si840x
Table 2. Electrical Characteristics for Unidirectional Non-I
3.0 V < VDD < 5.5 V. TA = –40 to +125 °C. Typical specs at 25 °C
6
Parameter
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
Low Level Output Voltage
Input Leakage Current
Output Impedance
DC Supply Current (All inputs 0 V or at Supply)
Si8405 AVDD
Si8405 BVDD
Si8405 AVDD
Si8405 BVDD
10 Mbps Supply Current (All inputs = 500 kHz square wave, C3 = 15 pF on all outputs)
Si8405 AVDD
Si8405 BVDD
Timing Characteristics
Maximum Data Rate
Minimum Pulse Width
Propagation Delay
Pulse Width Distortion
|t
Propagation Delay Skew
Channel-Channel Skew
Output Rise Time
Output Fall Time
Notes:
PLH
1. The nominal output impedance of an isolator driver channel is approximately 50 , ±40%, which is a combination of
2. Does not include current for I
3. t
- t
the value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving loads
where transmission line effects will be a factor, output pins should be terminated with 50  controlled impedance PCB
traces.
the same supply voltages, load, and ambient temperature.
PSK(P-P)
PHL
|
is the magnitude of the difference in propagation delay times measured between different units operating at
1
3
2
t
PHL
t
Symbol
C channels. Assumes all isolated digital inputs are at same logic state.
PSK(P-P)
PWD
V
t
V
V
V
Z
PSK
I
OH
, t
t
t
OL
IH
L
IL
O
r
f
PLH
See Figure 1 and
See Figure 1 and
V
Test Condition
All inputs 0 DC
All inputs 0 DC
All inputs 1 DC
All inputs 1 DC
Preliminary Rev. 0.1
DD
See Figure 1
See Figure 1
loh = –4 mA
2
C
C
lol = 4 mA
Figure 2
Figure 2
3
3
= 5 V, 25 °C
= 15 pF
= 15 pF
AVDD, BVDD
2
C Digital Channels
–0.4
Min
2.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
Typ
4.8
0.2
—
—
—
50
—
—
—
—
—
—
2
2
2
3
3
3
3
2
2
Max
±10
0.8
0.4
10
40
20
12
20
10
—
—
—
4
4
6
6
5
5
4
4
Mbps
Unit
mA
mA
mA
mA
mA
mA
µA
ns
ns
ns
ns
ns
ns
ns
V
V
V
V
