ST3485EBDR datasheet(9/24 Pages) STMICROELECTRONICS

9 / 24 page

ST3485EB, ST3485EC, ST3485EI, ST3485EIY

Electrical characteristics

DocID9102 Rev 11

9/24

Table 11: Receiver switching characteristics (VCC = 3 V to 3.6 V, TA = 0 to 70 °C for

ST3485ECDR, TA = -40 to 85 °C for ST3485EBDR, TA = -40 to 125 °C for ST3485EIDT and

ST3485EIYDT, unless otherwise specified. Typical values are referred to TA = 25 °C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

tRPLH, tRPHL

Propagation delay

VID = 0 V to 3 V, CL = 15 pF (Figure 13

and Figure 14)

—

tRPDS

|tRPLH - tRPHL| receiver

propagation delay skew

VID = 0 V to 3 V, CL = 15 pF (Figure 13

and Figure 14)

tPRZL

Receiver output enable

time to low level

CL = 15 pF (Figure 15 and Figure 17)

tPRZH

Receiver output enable

time to high level

CL = 15 pF (Figure 15 and Figure 16)

tPRHZ

Receiver output disable

time from high level

CL = 15 pF (Figure 15 and Figure 18)

tPRLZ

Receiver output disable

time from low level

CL = 15 pF (Figure 15 and Figure 19)

tPRSH

Receiver output enable

time from shutdown to

high level

CL = 15 pF (Figure 15 and Figure 16)

tPRSL

Receiver output enable

time from shutdown to

low level

CL = 15 pF (Figure 15 and Figure 17)

µs

Notes:

1. ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes

state.

2. Measured on |tPLH(A) - tPHL(A)| and |tPLH(B) - tPHL(B)|.

3. The transceivers are put into shutdown by bring RE

high and DE low. If the input are

in state for less than 80 ns, the part are guaranteed not to enter shutdown. If the inputs are

in this state for at least 300 ns, the parts are guaranteed to have entered shutdown.

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