ST485ER

4/13

DRIVER SWITCHING CHARACTERISTICS

(See Note 1)

Note 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.

RECEIVER SWITCHING CHARACTERISTICS

(See Note 1)

Note 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.

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Propagation Delay Input to

Output

(See Fig. 3 and 5)

10

30

60

ns

Output Skew to Output

(See Fig. 3 and 5)

510

ns

Rise or Fall Time

(See Fig. 3 and 5)

315

40

ns

Output Enable Time

S2 = Closed

(See Fig. 4 and 6)

70

90

ns

Output Enable Time

S1 = Closed

(See Fig. 4 and 6)

70

90

ns

Output Disable Time

S1 = Closed

(See Fig. 4 and 6)

70

90

ns

Output Disable Time

S2 = Closed

(See Fig. 4 and 6)

70

90

ns

Output AB Capacitance

43

pF

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Propagation Delay Input to

Output

(See Fig. 3 and 7)

20

130

210

ns

Differential Receiver Skew

(See Fig. 3 and 7)

13

ns

Output Enable Time

S1 = Closed

(See Fig. 2 and 8)

20

50

ns

Output Enable Time

S2 = Closed

(See Fig. 2 and 8)

20

50

ns

Output Disable Time

S1 = Closed

(See Fig. 2 and 8)

20

50

ns

Output Disable Time

S2 = Closed

(See Fig. 2 and 8)

20

50

ns

Maximum Data Rate

2.5

Mbps