sp483eep Exar Corporation, sp483eep Datasheet - Page 4

• Manufacturer Part Number: sp483eep
• Description: Enhanced Low Emi Half-duplex Rs-485 Transceiver
• Manufacturer: Exar Corporation

Figure 5. Driver Propagation Delays
SP483EDS/05
Figure 3. RS-485 Driver/Receiver Timing Test Circuit
Figure 1. RS-485 Driver DC Test Load Circuit
DI
t
DIFFERENTIAL
SKEW =
RO 1
RE 2
DE 3
DI 4
A
B
OUTPUT
OUTPUT
| t
DRIVER
V
DPLH -
A
A
B
R
V
Pinout (Top View)
– V
DIFF
OD
C
DI
Top View
B
C
L1
t
D
DPHL
SP483E
L2
V
R
R
+3V
V
R
0V
O
0V
O
V
SP485
B
A
+
–
OC
|
V
A
B
O
1/2V
8
7
6
5
SP483E Low EMI Half-Duplex RS485 Transceiver
V
B
A
GND
CC
O
f = 100kHz; t
RO
15pF
1.5V
4
t
t
DPLH
R
PLH
t
Figure 2. Receiver Timing Test Load Circuit
Figure 4. RS-485 Driver Timing Test Load #2 Circuit
PIN FUNCTION
Pin 1 – RO – Receiver Output.
Pin 2 – RE – Receiver Output Enable Active LOW.
Pin 3 – DE – Driver Output Enable Active HIGH.
Pin 4 – DI – Driver Input.
Pin 5 – GND – Ground Connection.
Pin 6 – A – Driver Output/Receiver Input
Non-inverting.
Pin 7 – B – Driver Output/Receiver Input Inverting.
Pin 8 – Vcc – Positive Supply 4.75V<Vcc< 5.25V.
< 10ns; t
R
Output
Under
Receiver
Test
Output
t
t
F
DPHL
PHL
C
< 10ns
C
L
RL
Test Point
500
1.5V
1k
© Copyright 2000 Sipex Corporation
S
S
S
1
S
2
1
t
2
F
1/2V
1k
O
V
CC
V
CC