SP3485 datasheet

3
10/15/02 SP3481/3485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 Sipex Corporation
SPECIFICATIONS (continued)
T
AMB
= T
MIN
to T
MAX
and V
CC
= +3.3V ± 5% unless otherwise noted.
PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS
SP3481/SP3485 RECEIVER
AC Characteristics
Maximum Data Rate 10 Mbps RE = 0V, DE = 0V
Receiver Input to Output, t
PLH
40 70 100 ns Figures 6 and 11
70 ns T
AMB
= +25
o
C, V
CC
= +3.3V,
Figures 6 and 11
Receiver Input to Output, t
PHL
40 70 100 ns Figures 6 and 11
70 ns T
AMB
= +25
o
C, V
CC
= +3.3V,
Figures 6 and 11
Differential Receiver Skew 4 ns t
RSKEW
= t
RPHL
- t
RPLH
, Figures 6 and 11
Receiver Enable to
Output Low 35 60 ns Figures 7 and 12 ; S
1
closed, S
2
open
Receiver Enable to
Output High 35 60 ns Figures 7 and 12 ; S
2
closed, S
1
open
Receiver Disable from Low 35 60 ns Figures 7 and 12 ; S
1
closed, S
2
open
Receiver Disable from High 35 60 ns Figures 7 and 12 ; S
2
closed, S
1
open
SP3481 Shutdown Timing
Time to Shutdown 50 75 200 ns RE = 3.3V, DE = 0V
Driver Enable from Shutdown
to Output High 65 150 ns Figures 4 and 10
Driver Enable from Shutdown
to Output Low 65 150 ns Figures 5 and 10
Receiver Enable from
Shutdown to Output High 50 200 ns Figures 7 and 12; S
2
closed, S
1
open
Receiver Enable from
Shutdown to Output Low 50 200 ns Figures 7 and 12; S
1
closed, S
2
open
POWER REQUIREMENTS
Supply Current
SP3481/3485
No Load 1000 2000 µA RE, DI = 0V or V
CC
; DE = V
CC
800 1500 µA RE = 0V, DI = 0V or V
CC
; DE = 0V
SP3481
Shutdown Mode 10 µA DE = 0V, RE=V
CC