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SP339E
REV. 1.0.3
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
ELECTRICAL CHARACTERISTICS (Continued)
U NLESS OTHERWISE NOTED :
V CC = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1 F; T A = T MIN to T MAX . Typical values are at V CC = 3.3V, T A = +25°C.
S YMBOL
P ARAMETERS
M IN .
T YP .
M AX .
U NITS
C ONDITIONS
DIFFERENTIAL RECEIVER INPUTS (RS-485 / RS-422)
R IN
Receiver Input Resistance
96
k
TERM = 0V,
-7V V IN +12V
V TH
Receiver Differential
Threshold Voltage
-200
-125
-50
mV
V TH
I IN
Receiver Input Hysteresis
Receiver Input Current
25
125
-100
mV
A
A
V CM = 0V
V IN = +12V
V IN = -7V
R TERM
R TERM
Termination Resistance
Termination Resistance
100
100
120
120
155
140
TERM = V CC , Figure 5
-7V V CM +12V
TERM = V CC , Figure 5
V CM = 0V
DIFFERENTIAL DRIVER OUTPUTS (RS-485 / RS-422)
2
V CC
V
R L = 100
(RS-422), Figure 6
V OD
Differential Driver Output
1.5
1.5
V CC
V CC
V
V
R L = 54 (RS-485), Figure 6
-7V V CM +12V, Figure 7
V CC
V
No Load
V OD
V CM
V CM
Change In Magnitude of
Differential Output Voltage
Driver Common Mode Output Voltage
Change In Magnitude of
Common Mode Output Voltage
-0.2
+0.2
3
0.2
V
V
V
R L = 54
R L = 54
R L = 54
or 100 , Figure 6
or 100 , Figure 6
or 100 , Figure 6
I OSD
Driver Output Short Circuit Current
-250
250
mA
-7V
V O
+12V, Figure 8
DIR1 = 0V in Mode 11,
100
A
or ENABLE = 0V,
I O
Driver Output Leakage Current
V O +12V, V CC = 0V or 5.25V
DIR1 = 0V in Mode 11,
-100
7
A
or ENABLE = 0V,
V O
-7V, V CC = 0V or 5.25V
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