sp488ect Exar Corporation, sp488ect Datasheet - Page 5

• Manufacturer Part Number: sp488ect
• Description: Enhanced Quad Rs-485/rs-422 Line Receivers
• Manufacturer: Exar Corporation

SP488E/489EDS/07
AC PARAMETERS
V
Figure 3. Receiver Propagation Delays
Figure 4. Receiver Enable/Disable Timing
CC
Input A–B
= 5V 5%; typicals at 25 C; T
PARAMETER
PROPAGATION DELAY
Receiver Input to Output
Differential Receiver Skew (t
RECEIVER ENABLE
To Output HIGH
To Output LOW
RECEIVER DISABLE
From Output LOW
From Output HIGH
Low to HIGH (t
High to LOW (t
RO
RO
RO
EN
+V
–V
V
V
V
V
OD
OD
OH
3V
0V
5V
0V
OH
OL
OL
PLH
PHL
)
)
AMB
= 25 C unless otherwise noted.
SP488E/489E Enhanced Quad RS-485/RS-422 Line Receivers
SKD
t
PHL
t
)
t
ZH
MIN.
ZL
F = 1MHZ: t
F = 1MHZ: t
1.5V
TYP.
0V
45
45
30
35
35
30
5
Output normally high
1.5V
1.5V
1.5V
Output normally low
MAX.
r
r
5
60
60
60
60
60
60
< 10ns: t
< 10ns: t
f
t
f
t
PLH
< 10ns
t
HZ
< 10ns
LZ
UNIT
ns
ns
ns
ns
ns
ns
ns
0V
1.5V
C
t
C
(S2 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S1 closed)
CL = 15pF; Figures 2 and 4
(S2 closed)
1.5V
SKD
L
L
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0.5V
= 15pF; Figure 1, 3
= 15pF; Figures 2 and 4
0.5V
CONDITIONS
= t
PHL
- t
PLH