ST485BD 데이터 시트보기 (PDF) - STMicroelectronics

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ST485BD

Low power RS-485 / RS-422 transceiver

STMicroelectronics 

Electrical characteristics

ST485

4.2

Receiver switching characteristics

VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred

to TA = 25°C)

Table 7. Receiver switching characteristics

Symbol

Parameter

Test conditions (1)

Value

-40 to 85 °C

-55 to 125°C Unit

Min. Typ. Max. Min. Max.

tPLH

tPHL

Propagation Delay Input RDIFF = 54ΩCL1 = CL2 = 100pF

to Output

(See Figure 4. and Figure 8.)

20

130 210

tSKD

Differential Receiver

Skew

RDIFF = 54ΩCL1 = CL2 = 100pF

(See Figure 4. and Figure 8.)

13

230 ns

ns

tPZH Output Enable Time

tPZL Output Enable Time

tPLZ Output Disable Time

tPHZ Output Disable Time

CRL = 15pFS1 = Closed

(See Fig. 2 and Figure 9.)

CRL = 15pFS2 = Closed

(See Fig. 2 and Figure 9.)

CRL = 15pFS1 = Closed

(See Fig. 2 and Figure 9.)

CRL = 15pFS2 = Closed

(See Fig. 2 and Figure 9.)

20 50

20 50

20 50

20 50

56 ns

56 ns

56 ns

56 ns

fMAX Maximum Data Rate

2.5

2.5

Mbps

1. All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device

ground unless specified

8/19

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