SP481E Datasheet, PDF (3/12 Pages) Sipex Corporation – Enhanced Low Power Half-Duplex RS-485 Transceivers

T_MIN to T_MAX and V_CC = +5.0V +/-5% unless otherwise noted.
PARAMETERS
MIN.
SP481E/SP485E DRIVER (continued)
AC Characteristics
Driver Enable to Output High
TYP.
40
Driver Enable to Output Low
40
Driver Disable Time from High
40
Driver Disable Time from Low
40
SP481E/SP485E RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
Differential Input Threshold
-0.4
(SP485EMN ONLY)
Input Hysteresis
20
Output Voltage High
3.5
Output Voltage Low
Three-State ( High Impedance)
Output Current
Input Resistance
12
15
Input Current (A, B); V_IN = 12V
Input Current (A, B); V_IN = -7V
Short Circuit Current
7
SP481E/SP485E RECEIVER
AC Characteristics
Max. Transmission Rate
10
Receiver Input to Output
20
45
Receiver Input to Output
20
45
Differential Receiver Skew
13
|t_PHL - t_PLH|
Receiver Enable to Output Low
45
Receiver Enable to Output High
45
Receiver Disable from LOW
45
Receiver Disable from High
45
ELECTRICAL CHARACTERISTICS
MAX. UNITS CONDITIONS
70
ns C_L = 100pF, see Figures 4 and 6,
S₂ closed
70
ns C_L = 100pF, see Figures 4 and 6,
S₁ closed
70
ns C_L = 100pF, see Figures 4 and 6,
S₂ closed
70
ns C_L = 100pF, see Figures 4 and 6,
S₁ closed
+0.2
+0.4
0.4
+/-1
+1.0
-0.8
95
Volts
Volts
-7V ≤ V_CM ≤ +12V
-7V ≤ V_CM ≤ +12V
mV
Volts
Volts
µA
V_CM = 0V
I_O = -4mA, V_ID = +200mV
I_O = +4mA, V_ID = +200mV
0.4V ≤ V_O ≤ 2.4V; RE = 5V
kΩ -7V ≤ V_CM ≤ +12V
mA DE = 0V, V_CC = 0V or 5.25V,
V_IN = 12V
mA DE = 0V, V_CC = 0V or 5.25V,
V_IN = -7V
mA 0V ≤ V_O ≤ V_CC
Mbps RE = 0V, DE = 0V
100
ns t_{PLH ;} See Figures 3 & 7, R_DIFF =
54Ω, C_L1 = C_L2 = 100pF
100
ns t_{PHL ;} See Figures 3 & 7, R_DIFF =
54Ω, C_L1 = C_L2 = 100pF
ns R_DIFF = 54Ω, C_L1 = C_L2 = 100pF, see
Figures 3 and 7
70
ns C_RL = 15pF, Figures 2 & 8; S₁
Closed
70
ns C_RL = 15pF, Figures 2 & 8; S₂
Closed
70
ns C_RL = 15pF, Figures 2 & 8; S₁
Closed
70
ns C_RL = 15pF, Figures 2 & 8; S₂
Closed
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP481E,485E_100_121808