si8405 Silicon Laboratories, si8405 Datasheet - Page 4

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

Si840x
1. Electrical Specifications
Table 1. Si840x Electrical Characteristics for Bidirectional I
3.0 V < VDD < 5.5 V. TA = –40 to +125 °C. Typical specs at 25 °C
4
DC Specifications
AVDD current 5 V
BVDD current 5 V
AVDD current 3.3 V
BVDD current 3.3 V
SCL and SDA Logic High
Leakage
Logic Levels Side A
Logic Input Threshold
Logic Low Output Voltages
Input/Output Logic Low Level
Difference
Logic Levels Side B
Logic Low Input Voltage
Logic High Input Voltage
Logic Low Output Voltage
AC Specifications (measured at 1.40 V unless otherwise specified)
Maximum I
Propagation Delay
5 V Operation
Side A to side B rising
Side A to side B falling
Side B to side A rising
Side B to side A falling
3.3 V Operation
Side A to side B rising
Side A to side B falling
Side B to side A rising
Side B to side A falling
Notes:
1. Does not include current consumed by an isolated digital channel.
2. All voltages are relative to respective ground.
3. V
4. I
5. Side A measured at 0.6 V.
minimum difference between the output logic low level of the driving device and the input logic threshold.
2
IL
CV (Side A) = I
< 0.51 V, V
4
2
Parameter
C bus Frequency
IH
3
> 0.760 V.
5
5
5
5
2
CV
OL
(Side A) – I
I
I
I
I
I
I
2
2
2
2
2
2
CV
CV
Isdaa, Isdab
CV
CV (Side A)
CV
CV
Iscla, Isclb
2
Symbol
CV
OL
OL
Tphab
Tphba
Tphab
Tphba
IH
Tplab
Tplba
Tplab
Tplba
IL
Fmax
T
Idda
Iddb
Idda
Iddb
T
(Side A)
(Side B)
(Side B)
(Side A)
(Side B)
(Side A). To ensure no latch-up on a given bus, I
Preliminary Rev. 0.1
ISDAA = ISCLA = 2.5 mA
ISDAA = ISCLA = 0.5 mA
SDAA, SCLA = VSSA
SDAB, SCLB = VSSB
No bus capacitance
All I
Test Condition
ISCLB = 35 mA
BVDD = 3.3 V
AVDD = 3.3 V
See Figure 2
BVDD = 5 V
AVDD = 5 V
R1 = 1400
2
R2 = 499
R1 = 806
R2 = 499
C inputs low
2
C Channels
1,2
Min
510
680
610
2.0
—
—
—
—
—
50
—
—
—
—
—
—
—
—
—
—
—
2
CV (Side A) is the
Typ
25
36
18
15
28
34
20
16
—
—
—
—
—
—
—
6
6
6
6
2
Max
760
900
850
400
0.8
1.7
10
10
10
10
10
—
—
—
—
—
—
—
—
—
—
MHz
Unit
mA
mA
mA
mA
mV
mV
mV
mV
mV
µA
ns
ns
ns
ns
ns
ns
ns
ns
V
V