sp338e Exar Corporation, sp338e Datasheet - Page 3

• Manufacturer Part Number: sp338e
• Description: Rs-232/rs-485/rs-422 Transceiver With Internal Termination
• Manufacturer: Exar Corporation

REV. 1.0.0
PIN DESCRIPTIONS BY MODE (MODE2, MODE1, MODE0)
Pin
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
ENABLE
MODE0
MODE1
MODE2
INVDIR
SLEW
TERM
Name
GND
DIR1
DIR2
VCC
VCC
L1
L2
L3
L4
L6
L7
L8
L9
Figure 1
000,
0
0
0
R1 Output
R2 Output
R3 Output
R4 Output
R5 Output
T1 Input
T2 Input
T3 Input
Figure 2
001,
1
0
0
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
ENABLE = V
T1 Enable,
R1 Disable
R1 Output
Figure 3
T1 Input
010,
1
1
1
1
0
1
0
Inverts DIR1 and DIR2, where applicable
CC
SLEW = V
for operation, ENABLE = 0V for shutdown
R1 Output
T1 Enable
Figure 4
T1 Input
3
011,
Enables RS-485/422 receiver termination
1
1
1
1
1
1
0
CC
Ground
V
V
enables 250kbps slew limiting
CC
CC
R1 Output
R2 Output
T1 Enable
T2 Enable
Figure 5
T1 Input
T2 Input
100,
1
1
1
0
0
1
R1 Output
T1 Enable
Figure 6
T1 Input
101,
1
1
1
1
1
0
1
R1 Disable
T1 Enable,
R1 Output
Figure 7
T1 Input
110,
1
1
1
1
0
1
1
SP338E
T1 Enable,
R1 Disable
T2 Enable,
R2 Disable
R1 Output
R2 Output
R3 Output
R4 Output
Figure 8
T1 Input
T2 Input
111,
1
1
1
1