Si844x/5x QSOP

Rev. 1.2

9

100 Mbps Supply Current (All inputs = 50 MHz square wave, CI = 15 pF on all outputs)

Si8455Bx

—

—

4.4

16.8

6.6

21

mA

Si8442Bx

—

—

8.6

8.6

10.8

10.8

mA

Timing Characteristics

Si845xBx, Si8442Bx

Maximum Data Rate

0

—

1.0

Mbps

Minimum Pulse Width

—

—

250

ns

Propagation Delay

See Figure 2

—

—

35

ns

Pulse Width Distortion

PWD

See Figure 2

—

—

25

ns

Propagation Delay Skew2

—

—

40

ns

Channel-Channel Skew

—

—

35

ns

Si845xBx, Si8442Bx

Maximum Data Rate

0

—

150

Mbps

Minimum Pulse Width

—

—

6.0

ns

Propagation Delay

See Figure 2

3.0

6.0

9.5

ns

Pulse Width Distortion

PWD

See Figure 2

—

1.5

2.5

ns

Propagation Delay Skew2

—2.0

3.0

ns

Channel-Channel Skew

—0.5

1.8

ns

All Models

Output Rise Time

See Figure 2

—4.3

6.1

ns

Output Fall Time

See Figure 2

—3.0

4.3

ns

Common Mode Transient

Immunity

CMTI

—

25

—

kV/µs

Enable to Data Valid

See Figure 1

—

5.0

8.0

ns

Enable to Data Tri-State

See Figure 1

—

7.0

9.2

ns

Start-up Time3

—15

40

µs

Table 4. Electrical Characteristics (Continued)

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Notes:

1. The nominal output impedance of an isolator driver channel is approximately 85 , ±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.

the same supply voltages, load, and ambient temperature.

3. Start-up time is the time period from the application of power to valid data at the output.