sp337e Exar Corporation, sp337e Datasheet - Page 12

• Manufacturer Part Number: sp337e
• Description: 3.3v To 5v Rs-232/rs-485/rs-422 Multiprotocol Transceiver
• Manufacturer: Exar Corporation

SP337E
3.3V TO 5V RS-232/RS-485/RS-422 MULTIPROTOCOL TRANSCEIVER
F
F
F
IGURE
IGURE
IGURE
13. RS-485 R
14. RS-485 R
15. RS-485 R
-1.5V
1.5V
ECEIVER
ECEIVER
ECEIVER
GENERATOR
S3
S1 is open, S2 is closed, S3 = 1.5V
E
E
E
RE
S1 is closed, S2 is open, S3 = -1.5V
OUT
NABLE AND
NABLE AND
NABLE AND
RE
OUT
B
A
50Ω
R
RE
D
D
D
ISABLE
ISABLE
ISABLE
V
OUT
OL
= V
T
T
T
12
IMES
IMES
IMES
C
L
CC
= 15pF
/2
t
T
T
T
1.5V
ZL
1kΩ
t
EST
IMING
IMING
1.5V
ZH
C
IRCUIT
D
D
3V
IAGRAM
3V
IAGRAM
V
OH
/2
V
V
0V
V
0V
CC
1
2
OH
OL
S1
S2
Vcc
REV. 1.0.2