5

SP488E/489EDS/07

SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers

© Copyright 2000 Sipex Corporation

PARAMETER

MIN.

TYP.

MAX.

UNIT

CONDITIONS

PROPAGATION DELAY

Receiver Input to Output

C

Low to HIGH (t

60

ns

High to LOW (t

60

ns

Differential Receiver Skew (t

5

ns

t

t

RECEIVER ENABLE

To Output HIGH

30

60

ns

C

(S2 closed)

To Output LOW

35

60

ns

CL = 15pF;

Figures 2 and 4

(S1 closed)

RECEIVER DISABLE

From Output LOW

35

60

ns

CL = 15pF;

Figures 2 and 4

(S1 closed)

From Output HIGH

30

60

ns

CL = 15pF;

Figures 2 and 4

(S2 closed)

Figure 4. Receiver Enable/Disable Timing

3V

0V

5V

0V

Output normally low

EN

1.5V

1.5V

1.5V

0.5V

1.5V

0.5V

Output normally high

RO

RO

Figure 3. Receiver Propagation Delays

0V

0V

1.5V

RO

1.5V

Input A–B

AC PARAMETERS

V