SP485R Datasheet, PDF (3/9 Pages) Exar Corporation – 1/10th Unit Load RS-485 Transceiver

Typically 25ºC @ V_CC = +5V unless otherwise noted.
PARAMETERS
MIN.
TYP.
RS-485 RECEIVER DC Characteristics (continued)
Common Mode Range
-7.0
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
+12.0 Volts
Receiver Sensitivity
Input Impedance
120
RS-485 RECEIVER AC Characteristics
+/-0.2 Volts -7V ≤ V_CM ≤ +12V
150
kΩ -7V ≤ V_CM ≤ +12V
Maximum Data Rate
1
Mbps
Propagation Delay; t_PHL
1200
ns See Figures 4 & 8, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
Propagation Delay; t_PLH
1200
ns See Figures 4 & 8, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF
Differential Receiver Skew
60
ns See Figures 4 & 8, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF,
t_SKEW = |t_PHL - t_PLH|
RS-485 Driver Enable / Disable Time
Driver Enable to Output Low
40
Driver Enable to Output High
40
Driver Disable Time from Low
40
Driver Disable Time from High
40
RS-485 Receiver Enable / Disable Time
Receiver Enable to Output Low
40
Receiver Enable to Output High
40
Receiver Disable from Low
40
Receiver Disable from High
40
POWER REQUIREMENTS
Supply Voltage V_CC
Supply Current I_CC, No Load
Supply Current I_CC, No Load
ENVIRONMENTAL
Operating Temperature
Commercial (..C..)
Industrial (..E..)
Storage Temperature
+4.75
300
500
0
-40
-65
500
ns C_L = 15pF, see Figures 5 and 7,
S₁ closed
500
ns C_L = 15pF, see Figures 5 and 7,
S₂ closed
500
ns C_L = 15pF, see Figures 5 and 7,
S₁ closed
500
ns C_L = 15pF, see Figures 5 and 7,
S₂ closed
500
ns C_L = 15pF, see Figures 3 and 9,
S₁ closed
500
ns C_L = 15pF, see Figures 3 and 9,
S₂ closed
500
ns C_L = 15pF, see Figures 3 and 9,
S₁ closed
500
ns C_L = 15pF, see Figures 3 and 9,
S₁ closed
+5.25
500
900
Volts
µA
µA
RE = Vcc or 0V, DE = 0V
RE = Vcc or 0V, DE = Vcc
+70
ºC
+85
ºC
+150
ºC
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP485R_100_072309