SP4082E Datasheet, PDF (9/14 Pages) Exar Corporation – 5V RS-485/RS-422 Transceivers 1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected

.5V
-.5V
Receiver Enable and Disable Times Test Circuit
S3
B
A
S
K½
S2
RE
CL=5pF
GENERATOR
50½
DESCRIPTION
VCC
Receiver Enable and DisableTiming Diagram
S is open, S2 is closed, S3=.5V
3V
.5V
RE
tZH, tZH(SHDN)
OUT
VOH
VOH/2
0V
S is closed, S2 is open, S3= -.5V
3V
RE
.5V
0V
tZL, tZL(SHDN)
OUT
VOL = VCC/2
VCC
VOL
S is open, S2 is closed, S3=.5V
3V
.5V
RE
0.25V
VOH
OUT
0V
S is closed, S2 is open, S3= -.5V
RE
.5V
tLZ
3V
0V
OUT
0.25V
VCC
VOL
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)6687000 • Fax [phone] • www.exar.com

SP4082E_100_122007