SP339E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
REV. 1.0.0
TIMING CHARACTERISTICS
U
NLESS OTHERWISE NOTED
:
V
CC
= +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1µF; T
A
= T
MIN
to T
MAX
. Typical values are at V
CC
= 3.3V, T
A
= +25°C.
S
YMBOL
ALL MODES
t
ENABLE
t
SHUTDOWN
Enable from Shutdown
Enable to Shutdown
1000
1000
ns
ns
P
ARAMETERS
M
IN
.
T
YP
.
M
AX
.
U
NITS
C
ONDITIONS
RS-232, DATA RATE = 250kbps (SLEW = Vcc), ONE TRANSMITTER SWITCHING
Maximum Data Rate
t
RHL
, t
RLH
⏐t
RHL
-t
RLH
⏐
t
DHL
, t
DLH
⏐t
DHL
-t
DLH
⏐
Receiver Propagation Delay
Receiver Propagation Delay Skew
Driver Propagation Delay
Driver Propagation Delay Skew
1400
600
250
100
100
kbps
ns
ns
ns
ns
R
L
= 3kΩ, C
L
= 1000pF
C
L
= 150pF,
R
L
= 3kΩ, C
L
= 2500pF,
t
SHL,
t
SLH
Transition Region Slew Rate from
+3.0V to -3.0V or -3.0V to +3.0V
V
CC
= 3.3V, R
L
= 3kΩ to 7kΩ,
4
30
V/µs
C
L
= 150pF to 2500pF,
V
CC
= 3.3V, R
L
= 3kΩ to 7kΩ,
6
30
V/µs
C
L
= 150pF to 2500pF,
T
A
= 25°C,
t
SHL,
t
SLH
Transition Region Slew Rate from
+3.0V to -3.0V or -3.0V to +3.0V
RS-232, DATA RATE = 1Mbps (SLEW = 0V), ONE TRANSMITTER SWITCHING
Maximum Data Rate
t
RHL
, t
RLH
⏐t
RHL
-t
RLH
⏐
t
DHL
, t
DLH
⏐t
DHL
-t
DLH
⏐
Receiver Propagation Delay
Receiver Propagation Delay Skew
Driver Propagation Delay
Driver Propagation Delay Skew
300
150
1
100
100
Mbps R
L
= 3kΩ, C
L
= 250pF
ns
ns
ns
ns
C
L
= 150pF,
R
L
= 3kΩ, C
L
= 1000pF,
t
SHL,
t
SLH
Transition Region Slew Rate from
+3.0V to -3.0V or -3.0V to +3.0V
V
CC
= 3.3V, R
L
= 3kΩ to 7kΩ,
15
150
V/µs
C
L
= 150pF to 1000pF,
V
CC
= 3.3V, R
L
= 3kΩ to 7kΩ,
24
150
V/µs
C
L
= 150pF to 1000pF,
T
A
= 25°C,
t
SHL,
t
SLH
Transition Region Slew Rate from
+3.0V to -3.0V or -3.0V to +3.0V
8
EXAR [ EXAR CORPORATION ]
