ST3485EBDR datasheet(7/22 Pages) STMICROELECTRONICS

7 / 22 page

ST3485EB - ST3485EC

Electrical characteristics

7/22

Table 10.

Receiver electrical characteristics

VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred

to TA = 25°C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VTH

Receiver differential

threshold voltage

VCM = -7V to 12V, DE = 0

-0.2

0.2

ΔVTH

Receiver input hysteresis

VCM = 0V

VOH

Receiver output high

voltage

IOUT = -4mA, VID = 200mV

(Figure 8 and Figure 9)

VOL

Receiver output low

voltage

IOUT = 4mA, VID = -200mV, (Figure 3)0.4

IOZR

3-State (high impedance)

output current at receiver

VCC = 3.6V, VO = 0V to VCC

± 1µA

RRIN

Receiver input resistance

VCM = -7V to 12V

IOSR

Receiver short-circuit

current

VRO = 0V to VCC

760

Table 11.

Driver switching characteristics

VCC = 3 V to 3.6 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred

to TA = 25 °C)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Maximum data rate

Mbps

tDD

Differential output delay

RL= 60Ω, CL = 15pF, (Figure 4 and

Figure 5)

tTD

Differential output

transition time

RL= 60Ω, CL = 15pF, (Figure 4 and

Figure 5)

tPLH

tPHL

Propagation delay

RL= 27Ω, CL = 15pF, (Figure 8 and

Figure 9)

tPDS

|tPLH - tPHL| Propagation

delay skew (Note 2)

RL= 27Ω, CL = 15pF, (Figure 8 and

Figure 9)

tPZL

Output enable time

RL= 110Ω, (Figure 10 and Figure 11)19

tPZH

Output enable time

RL= 110Ω, (Figure 6 and Figure 7)30

tPHZ

Output disable time

RL= 110Ω, (Figure 6 and Figure 7)19

tPLZ

Output disable time

RL= 110Ω, (Figure 10 and Figure 11)30

tSKEW

Differential output delay

skew

tZH(SHDN)

Driver enable from

shutdown to output high

tZL(SHDN)

Driver enable from

shutdown to output low

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