SP490 Datasheet, PDF (6/12 Pages) Sipex Corporation – Full Duplex RS-485 Transceivers

T_MIN to T_MAXand V_CC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN. TYP. MAX.
SP491 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
7
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; REB = 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
SP491 RECEIVER
AC Characteristics
Maximum Data Rate
5 Mbps
Receiver Input to Output
60
90 150 ns

Receiver Input to Output
60
90 150 ns

Diff. Receiver Skew It_PLH-t_PHLI 13 ns

Receiver Enable to Output Low
20
50 ns
Receiver Enable to Output High
20
50 ns
Receiver Disable from Low
20
50 ns
Receiver Disable from High
20
50 ns
REB = 0V
t_PLH; R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF; Figures 3 & 8
t_PHL; R_DIFF = 54Ω,
C_L1 = C_L2 ⁼ 100pF; Figures 3 & 8
R_DIFF = 54Ω; C_L1 = C_L2 = 100pF;
Figures 3 & 8
C_RL = 15pF; Figures 2 and 9; S₁ closed
C_RL = 15pF; Figures 2 and 9; S₂ closed
C_RL = 15pF; Figures 2 and 9; S₁ closed
C_RL = 15pF; Figures 2 and 9; S₂ closed
POWER REQUIREMENTS
Supply Voltage
+4.75
+5.25
Supply Current
600
SP491 ENVIRONMENTAL
AND MECHANICAL
Operating Temperature
Commercial (C_)
0
+70
Industrial (E_)
-40
+85
Storage Temperature
-65
+150
Package
Plastic DIP (_S)
NSOIC (_N)
Volts
µA
°C
°C
°C
REB, D = 0V or V_CC; DE = V_CC

Figure 9. Receiver Enable and Disable Times
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • www.exar.com

SP490,491_100_071408