SP3485 Datasheet, PDF (3/9 Pages) Exar Corporation – +3.3V Low Power Half-Duplex RS-485 Transceiver

T_AMB = T_MIN to T_MAX and V_CC = +3.3V +/-5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
SP3485 DRIVER AC Characteristics continued
Driver Enable to Output High
35
Driver Enable to Output Low
30
Driver Disable Time from Low
20
Driver Disable Time from High
20
Driver Enable from Shutdown
to Output High, t_PSH
Driver Enable from Shutdown
to Output Low, t_PSL
Time to Shutdown, t_SHDN
50
200
SP3485 RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
Input Hysteresis
20
Output Voltage HIGH
Vcc-0.4
Output Voltage LOW
Three-State (High Impedance)
Output Current
Input Resistance
12
Input Current (A, B); V_IN = 12V
Input Current (A, B); V_IN = -7V
Short Circuit Current
7
SP3485 RECEIVER
AC Characteristics
Maximum Data Rate
10
Receiver Input to Output, t_PLH
40
Receiver Input to Output, t_PLH
Receiver Input to Output, t_PHL
35
Receiver Input to Output, t_PHL
Differential Receiver Skew
4
Receiver Enable to Output Low
10
Receiver Enable to Output High
10
Receiver Disable from Low
10
Receiver Disable from High
10
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
120
ns Figures 4 and 11
120
ns Figures 5 and 11
120
ns Figures 5 and 11
120
ns Figures 4 and 11
250
ns C_L = 50pF, R_L = 500Ω.
Figures 4, 5, and 11
250
ns
600
ns Notes 1 and 2
+0.2
0.4
+/-1
+1.0
-0.8
60
Volts
mV
Volts
Volts
µA
-7V ≤ V_CM ≤ +12V
V_CM = 0V
V_ID = +200mV, -1.5mA
V_ID = -200mV, 2.5mA
0V ≤ V_O ≤ V_CC; RE = V_CC
kΩ -7V ≤ V_CM ≤ +12V
mA DE = 0V, V_CC = 0V or 3.6V,
V_IN = 12V
mA DE = 0V, V_CC = 0V or 3.6V,
V_IN = -7V
mA 0V ≤ V_CM ≤ V_CC
Mbps RE = 0V, DE = 0V
100
ns Figures 6 and 12
70
ns T_AMB = +25°C, Vcc = 3.3V,
Figures 6 and 12
100
ns Figures 6 and 12
70
ns T_AMB = +25°C, Vcc = 3.3V,
Figures 6 and 12
ns
t_RSKEW = |t_RPHL- t_RPLH|,
Figures 6 and 12
60
ns Figures 7 and 13,
S₁ closed, S₂ open
60
ns Figures 7 and 13,
S₂ closed, S₁ open
60
ns Figures 7 and 13,
S₁ closed, S₂ open
60
ns Figures 7 and 13,
S₂ closed, S₁ open
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7000 • www.exar.com
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SP3485_200_051916