ST1480AB 데이터 시트보기 (PDF) - STMicroelectronics

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ST1480AB

3.3 V powered, 15 kV ESD protected, up to 12 Mbps true RS-485/RS-422 transceiver

STMicroelectronics 

ST1480AB - ST1480AC

Electrical characteristics

Table 9. Receiver electrical characteristics

Symbol

Parameter

Test Conditions

Min.

VTH

Receiver differential

threshold voltage

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

-0.2

ΔVTH Receiver input hysteresis VCM = 0 V

VOH

Receiver output high

voltage

IOUT = -4 mA, VID = 200 mV, (Figure 9)

2

VOL

Receiver output low

voltage

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

IOZR

3-state (high impedance)

output current at receiver

VCC = 3.6 V, VO = 0 V to VCC

RRIN Receiver input resistance VCM = -7 V to 12 V

24

IOSR

Receiver short-circuit

current

VRO = 0 V to VCC

7

Typ. Max. Unit

-0.015 V

30

µV

V

0.4

V

±1

µA

kΩ

60

mA

Symbol

Table 10. Driver switching characteristics

Parameter

Test Conditions

Min.

DR

Maximum data rate

12

tDD

Differential output delay

RL= 60 Ω, CL = 15 pF, (Figure 5 and

Figure 6)

tTD

Differential output

transition time

RL= 60 Ω, CL = 15 pF, (Figure 5 and

Figure 6)

tPLH

tPHL

Propagation delay

RL= 27 Ω, CL = 15 pF, (Figure 9 and

Figure 10)

tPDS

|tPLH - tPHL| propagation RL= 27 Ω, CL = 15 pF, (Figure 9 and

delay skew (Note 2)

Figure 10)

tPZL

tPZH

tPHZ

tPLZ

tSKEW

Output enable time

Output enable time

Output disable time

Output disable time

Differential output delay

skew

RL= 110 Ω, (Figure 11 and Figure 12)

RL= 110 Ω, (Figure 7 and Figure 8)

RL= 110 Ω, (Figure 7 and Figure 8)

RL= 110 Ω, (Figure 11 and Figure 12)

tZH(SHDN)

Driver enable from

shutdown to output high

tZL(SHDN)

Driver enable from

shutdown to output low

Typ.

15

18

12

18

2

19

30

19

30

1

30

19

Max. Unit

Mbps

30

ns

20

ns

30

ns

5

ns

35

ns

50

ns

35

ns

50

ns

3

ns

50

ns

35

ns

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