SP488EEP datasheet(5/10 Pages) SIPEX

5 / 10 page

SP488E/489EDS/07

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

PARAMETER

MIN.

TYP.

MAX.

UNIT

CONDITIONS

PROPAGATION DELAY

Receiver Input to Output

L = 15pF; Figure 1, 3

Low to HIGH (t

PLH)45

High to LOW (t

PHL)45

Differential Receiver Skew (t

SKD)

SKD =

PHL - tPLH

RECEIVER ENABLE

To Output HIGH

L = 15pF; Figures 2 and 4

(S2 closed)

To Output LOW

CL = 15pF;

Figures 2 and 4

(S1 closed)

RECEIVER DISABLE

From Output LOW

CL = 15pF;

Figures 2 and 4

(S1 closed)

From Output HIGH

CL = 15pF;

Figures 2 and 4

(S2 closed)

Figure 4. Receiver Enable/Disable Timing

VOH

Output normally low

F = 1MHZ: tr < 10ns: tf < 10ns

tZL

tLZ

VOL

1.5V

0.5V

1.5V

0.5V

Output normally high

tZH

tHZ

Figure 3. Receiver Propagation Delays

F = 1MHZ: tr < 10ns: tf < 10ns

tPHL

tPLH

VOL

1.5V

VOH

1.5V

–VOD

+VOD

Input A–B

AC PARAMETERS

CC = 5V±5%; typicals at 25°C; TAMB = 25°C unless otherwise noted.

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