SP491EEN-L Datasheet, PDF (6/12 Pages) Exar Corporation – Enhanced Full Duplex RS-485 Transceivers

T_MIN to T_MAXand V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN. TYP. MAX.
SP491E RECEIVER
DC Characteristics
Differential Input Threshold -0.2
+0.2
Input Hysteresis
70
Output Voltage High
3.5
Output Voltage Low
0.4
Three State (high impedance)
Output Current
±1
Input Resistance
12
15
Input Current (A, B); V_IN = 12V
±1.0
Input Current (A, B); V_IN = -7V
-0.8
Short-Circuit Current
85
ELECTRICAL CHARACTERISTICS
UNITS CONDITIONS
Volts ‑7V ≤ V_CM ≤ 12V
mV
V_CM = 0V
Volts
I_O = ‑4mA, V_ID = +200mV
Volts
I_O = +4mA, V_ID = ‑200mV
µA
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
SP491E RECEIVER
AC Characteristics
Maximum Data Rate 10 Mbps
Receiver Input to Output
20
45 100 ns

Receiver Input to Output
20
45 100 ns

Diff. Receiver Skew It_PLH-t_PHLI 13 ns

Receiver Enable to Output Low
45
70 ns
Receiver Enable to Output High
45
70 ns
Receiver Disable from Low
45
70 ns
Receiver Disable from High
45
70 ns
RE = 0V
t_PLH; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF; Figures 3 & 7
t_PHL; R_DIFF = 54Ω,
C_L1 = C_L2 ⁼ 100pF; Figures 3 & 7
R_DIFF = 54Ω; C_L1 = C_L2 = 100pF;
Figures 3 & 7
C_RL = 15pF; Figures 2 and 8; S₁ closed
C_RL = 15pF; Figures 2 and 8; S₂ closed
C_RL = 15pF; Figures 2 and 8; S₁ closed
C_RL = 15pF; Figures 2 and 8; S₂ closed
POWER REQUIREMENTS
Supply Voltage
+4.75
+5.25
Supply Current
900
SP491E ENVIRONMENTAL
AND MECHANICAL
Operating Temperature
Commercial (_C_)
0
+70
Industrial (_E_)
-40
+85
Storage Temperature
-65
+150
Package
Plastic DIP (_P)
NSOIC (_N)
Volts
µA
°C
°C
°C
RE, D = 0V or V_CC; DE = V_CC

Figure 8. Receiver Enable and Disable Times
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • www.exar.com

SP490E,491E_101_052413