English
Language : 

SP339EER1-0A Datasheet, PDF (8/23 Pages) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
◁
SP339E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
REV. 1.0.4
ELECTRICAL CHARACTERISTICS (Continued)
UNLESS OTHERWISE NOTED: 
VCC = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1PF; TA = TMIN to TMAX. Typical values are at VCC = 3.3V, TA = +25°C.
SYMBOL
PARAMETERS
MIN. TYP. MAX. UNITS
CONDITIONS
DIFFERENTIAL RECEIVER INPUTS (RS-485 / RS-422)
RIN
Receiver Input Resistance
96
VTH
'VTH
Receiver Differential
Threshold Voltage
Receiver Input Hysteresis
-200
IIN
Receiver Input Current
RTERM Termination Resistance
100
RTERM Termination Resistance
100
-125
25
120
120
-50
125
-100
155
140
k:
TERM = 0V,
-7V dVIN d+12V
mV
mV VCM = 0V
PA VIN = +12V
PA VIN = -7V
:
TERM = VCC, Figure 5
-7V dVCM d+12V
:
TERM = VCC, Figure 5
VCM = 0V
DIFFERENTIAL DRIVER OUTPUTS (RS-485 / RS-422)
2
1.5
VOD
Differential Driver Output
1.5
'VOD
VCM
'VCM
IOSD
Change In Magnitude of
Differential Output Voltage
Driver Common Mode Output Voltage
Change In Magnitude of
Common Mode Output Voltage
Driver Output Short Circuit Current
-0.2
-250
IO
Driver Output Leakage Current
-100
VCC
VCC
VCC
VCC
+0.2
3
0.2
250
100
V RL = 100: (RS-422), Figure 6
V RL = 54: (RS-485), Figure 6
V -7V dVCM d+12V, Figure 7
V No Load
V RL = 54: or 100:, Figure 6
V RL = 54: or 100:, Figure 6
V RL = 54: or 100:, Figure 6
mA -7V dVO d+12V, Figure 8
DIR1 = 0V in Mode 11,
PA or ENABLE = 0V,
VO +12V, VCC = 0V or 5.25V
DIR1 = 0V in Mode 11,
PA or ENABLE = 0V,
VO -7V, VCC = 0V or 5.25V
8
 ▷