SP338E Datasheet, PDF (3/25 Pages) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER

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