SP1490E Datasheet, PDF (3/10 Pages) Sipex Corporation – Full Duplex RS-485 Transceivers

T_MIN to T_MAX and V_CC = 5V ± 5% unless otherwise noted.
SP1490E/1491E RECEIVER
DC Characteristics
Differential Input Threshold
0.2
Input Hysteresis
70
Output Voltage High
3.5
Output Voltage Low
Input Resistance
12
15
Input Current (A, B); V_IN = 12V
Input Current (A, B); V_IN = -7V
Short-Circuit Current
SPECIFICATIONS (continued)
+0.2
0.4
±1.0
-0.8
85
Volts
mV
Volts
Volts
kΩ
mA
mA
mA
-7V ≤ V_CM ≤ 12V
V_CM = 0V
I_O = -4mA, V_ID = +200mV
I_O = +4mA, V_ID = -200mV
-7V ≤ V_CM ≤ 12V (1 unit load)
V_IN = 12V
V_IN = -7V
0V ≤ V_O ≤ V_CC
PARAMETERS
SP1490E/1491E RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output
MIN.
20
20
Receiver Input to Output
20
Diff. Receiver Skew It_PLH-t_PHLI
Receiver Tplh/Tphl
POWER REQUIREMENTS
Supply Voltage
Supply Current
ENVIRONMENTAL AND
MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
Plastic DIP (_S_)
NSOIC (_N)
+4.75
0
-40
-65
A
R
V_OD
B
R ^VOC
TYP. MAX. UNITS CONDITIONS
Mbps
45
50 ns
Ct^PLL1H=; ^RCDLI2FF==10504p^ΩF,; Figures 3 & 8
45
50 ns
tC_PLH1L;=RC_DLIF2F==10504pΩ_{F,; Figures 3 & 8}
5
10 ns
R_DIFF = 54Ω; C_L1 = C_L2 = 100pF;
40
70 ns
+5.25 Volts
900
µA
+70 °C
+85 °C
+150 °C
Receiver
Output
Test Point
1K
S₁
V_CC
C_RL
1K
S₂
Figure 1. Driver DC Test Load Circuit
3V
DE
C_L1
DI
A
R_DIFF
A
B
B
C_L2
RO
15pF
Figure 2. Receiver Timing Test Load Circuit
Output
500
Under
Test _CL
S₁
V_CC
S₂
Figure 3. Driver/Receiver Timing Test Circuit
Figure 4. Driver Timing Test Load #2 Circuit
Date: 5/18/04
SP1490E/1491E Full Duplex RS-485 Transceivers
3
© Copyright 2004 Sipex Corporation