SP339E Datasheet, PDF (7/21 Pages) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

SP339E
REV. 1.0.0
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
ELECTRICAL CHARACTERISTICS (Continued)
UNLESS 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.
SYMBOL
PARAMETERS
MIN. TYP. MAX. UNITS
CONDITIONS
DIFFERENTIAL RECEIVER INPUTS (RS-485 / RS-422)
R_IN
Receiver Input Resistance
96
V_TH
∆V_TH
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
-200
I_IN
Receiver Input Current
R_TERM Termination Resistance
100
R_TERM Termination Resistance
100
-125
25
120
120
-50
125
-100
155
140
TERM = 0V,
kΩ _{-7V ≤ VIN ≤ +12V}
mV
mV V_CM = 0V
µA V_IN = +12V
µA V_IN = -7V
Ω ^{TERM = VCC, Figure 5}
-7V ≤ V_CM ≤ +12V
Ω ^{TERM = VCC, Figure 5}
V_CM = 0V
DIFFERENTIAL DRIVER OUTPUTS (RS-485 / RS-422)
2
1.5
V_OD
Differential Driver Output
1.5
1.5
∆V_OD
V_CM
∆V_CM
Change In Magnitude of
-0.2
Differential Output Voltage
Driver CommonMode Output Voltage
Change In Magnitude of
Common Mode Output Voltage
I_OSD
Driver Output Short Circuit Current
I_O
Driver Output Leakage Current
V_CC
V R_L = 100Ω (RS-422), Figure 6
V_CC
V R_L = 54Ω (RS-485), Figure 6
V_CC
V V_CM = -7V, Figure 7
V_CC
V V_CM = +12V, Figure 7
+0.2 V R_L = 54Ω or 100Ω, Figure 6
3
V R_L = 54Ω or 100Ω, Figure 6
0.2
V R_L = 54Ω or 100Ω, Figure 6
±250
±100
mA -7V ≤ V_O ≤ +12V, Figure 8
DIR1 = 0V in Mode 11,
µA or ENABLE = 0V,
-7V ≤ V_O ≤ +12V
7