SP481ECP SIPEX [Sipex Corporation], SP481ECP Datasheet - Page 4

• Manufacturer Part Number: SP481ECP
• Description: Enhanced Low Power Half-Duplex RS-485 Transceivers
• Manufacturer: SIPEX [Sipex Corporation]

Figure 5. Driver Propagation Delays
Rev. 5/16/03
Figure 3. RS-485 Driver/Receiver Timing Test Circuit
Figure 1. RS-485 Driver DC Test Load Circuit
DI
t
DIFFERENTIAL
SKEW =
SKEW =
RO 1
RE 2
DE 3
DI 4
A
B
OUTPUT
OUTPUT
SP481E and SP485E
DRIVER
| t
A
B
R
V
V
DPLH -
Pinout (Top View)
DIFF
A
OD
C
– V
Top View
C
L1
DI
D
L2
B
R
R
t
R
DPHL
V
V
+3V
V
SP485
0V
O
0V
O
OC
B
A
+
–
|
A
B
V
O
8
7
6
5
SP481E Low Power Half-Duplex RS485 Transceivers
1/2V
V
B
A
GND
CC
RO
O
f = 1MHz; t
15pF
1.5V
4
R
t
t
DPLH
PLH
< 10ns; t
Figure 2. Receiver Timing Test Load Circuit
Figure 4. RS-485 Driver Timing Test Load #2 Circuit
t
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.
R
Output
Under
Receiver
Test
Output
F
t
t
DPHL
PHL
< 10ns
C
C
L
RL
Test Point
1.5V
500
1k
© Copyright 2003 Sipex Corporation
S
S
S
1
t
S
2
F
1/2V
1
2
1k
O
V
CC
V
CC