ST485EB データシートの表示（PDF） - STMicroelectronics

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ST485EB

±15 kV ESD protected, low power RS-485/RS-422 transceiver

STMicroelectronics 

ST485EB - ST485EC - ST485EX

Electrical characteristics

Table 7.

Symbol

DC electrical characteristics (continued) (VCC = 5 V ± 5 %, TA = TMIN to TMAX, unless

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

Parameter

Test conditions (1)

Min. Typ. Max. Unit

IOSD2

Driver short-circuit current,

VO=Low

VO = -7 to 12 V (3)

35

250 mA

IOSR Receiver short-circuit current VO = 0 V to VCC

7

95 mA

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

unless specified.

2. Supply current specification is valid for loaded transmitters when VDE = 0 V

3. Applies to peak current. See typical Operating Characteristics.

Table 8.

Symbol

Driver switching characteristics (VCC = 5 V ± 5 %, TA = TMIN to TMAX, unless otherwise

specified. Typical values are referred to TA = 25 °C)

Parameter

Test conditions (1)

Min. Typ. Max. Unit

tPLH

tPHL

tSK

tTLH

tTHL

tPZH

tPZL

tPLZ

tPHZ

Propagation delay input to RDIFF = 54 Ω, CL1 = CL2 = 100 pF

output

(See Figure 4 and Figure 6)

Output skew to output

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(See Figure 4 and Figure 6)

Rise or fall time

RDIFF = 54 Ω, CL1 = CL2 = 100 pF

(See Figure 4 and Figure 6)

Output enable time

CL = 100 pF, S2 = Closed

(See Figure 5 and Figure 7)

Output enable time

CL = 100 pF, S1 = Closed

(See Figure 5 and Figure 7)

Output disable time

CL = 15 pF, S1 = Closed

(See Figure 5 and Figure 7)

Output disable time

CL = 15 pF, S2 = Closed

(See Figure 5 and Figure 7)

25 45 ns

2

5

ns

15 40 ns

35 50 ns

25 40 ns

25 40 ns

35 50 ns

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

unless specified.

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