SPECIFICATIONS (continued)
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
SP1490E/1491E RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
Output Voltage Low
Input Resistance
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
0.2
3.5
12
+0.2 Volts
mV
-7V ≤ VCM ≤ 12V
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
-7V ≤ VCM ≤ 12V (1 unit load)
VIN = 12V
70
15
Volts
0.4
Volts
kΩ
±1.0 mA
-0.8
mA
VIN = -7V
0V ≤ VO ≤ VCC
85
mA
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP1490E/1491E RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output
20
20
Mbps
ns
45
45
50
50
t
; RDIFF = 54Ω,
CPLL1H= CL2 = 100pF; Figures 3 & 8
tPHL; RDIFF = 54Ω,
Receiver Input to Output
20
ns
CL1 = CL2 = 100pF; Figures 3 & 8
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Diff. Receiver Skew ItPLH-tPHL
Receiver Tplh/Tphl
I
5
40
10
70
ns
ns
POWER REQUIREMENTS
Supply Voltage
+4.75
+5.25 Volts
Supply Current
900
µA
ENVIRONMENTAL AND
MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
0
-40
-65
+70
+85
+150 °C
°C
°C
Plastic DIP (_S_)
NSOIC (_N)
1K
Test Point
A
Receiver
Output
V
CC
S
S
1
R
C
RL
1K
V
OD
V
OC
R
2
B
Figure 2. Receiver Timing Test Load Circuit
Figure 1. Driver DC Test Load Circuit
3V
DE
C
C
L1
V
CC
S
1
A
B
A
B
DI
R
DIFF
500
Output
RO
Under
L2
Test
C
L
15pF
S
2
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
© Copyright 2004 Sipex Corporation
3
SIPEX [ SIPEX CORPORATION ]
