SI88X4X Datasheet, PDF(10/48 Page) Silicon Laboratories – Precise timing on digital isolators

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SI88X4X Datasheet, PDF (10/48 Pages) Silicon Laboratories – Precise timing on digital isolators

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Si88x4x

Table 2. Electrical Characteristics1 (Continued)

VIN = 24 V; VDDA = 4.3 V (see Figure 3) for all Si8844x/64x; VDDA = VDDP = 3.0 to 5.5 V (see Figure 2) for all Si8824x/34x;

TA = â40 to 125 Â°C unless otherwise noted

Parameter

Symbol

Test Condition

Min Typ Max Unit

Si88x41

VDDA

VDDB

8.4

6.3

Si88x42

VDDA

VDDB

8.2

6.2

Si88x43

VDDA

VDDB

7.8

6.7

Si88x44

VDDA

VDDB

6.9

7.4

100 Mbps, VDDx = 5 V Â± 10% (All Inputs = 50 MHz Square Wave, CLOAD = 15 pF)

Si88x40

VDDA

VDDB

Si88x41

VDDA

VDDB

Si88x42

VDDA

VDDB

Si88x43

VDDA

VDDB

Si88x44

VDDA

VDDB

Timing Characteristics

8.2

â 26.2 â

â 14.7 â

â 22.0 â

â 18.9 â

â 16.5 â

â 24.0 â

â 11.7 â

â 28.1 â

6.6

Data Rate

â 100 Mbps

Notes:

1. Over recommended operating conditions as noted in Table 1.

2. VOUT = VSNS x (1 + R1/R2) + R1 x Ioffset

3. VDDP current needed for dc-dc circuits.

4. VDDA current needed for dc-dc circuits.

5. The nominal output impedance of an isolator driver channel is approximately 50 ï, Â±40%, which is a combination of 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 appropriately terminated with controlled

impedance PCB traces.

6. tPSK(P-P) is the magnitude of the difference in propagation delay times measured between different units operating at

the same supply voltages, load, and ambient temperature.

7. Start-up time is the time period from when the UVLO threshold is exceeded to valid data at the output.

Preliminary Rev. 0.6

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