sp337e Exar Corporation, sp337e Datasheet - Page 3

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

REV. 1.0.2
PIN DESCRIPTIONS
Pin Assignments
P
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
11
IN
1
2
3
4
5
6
7
8
9
#
RS232/RS485
P
IN
RXEN
TXEN
GND
RX1
RX2
RX3
RX4
RX5
TX4
TX3
TX1
TX2
C1+
C2+
Vcc
C1-
C2-
RI1
RI2
RI3
RI4
RI5
TI3
V+
V-
N
AME
Output
Output
Output
Output
Output
Output
Output
Output
Output
Power
Power
Pump
Pump
Pump
Pump
Pump
Pump
T
Input
Input
Input
Input
Input
Input
Input
Input
Input
YPE
3.3V TO 5V RS-232/RS-485/RS-422 MULTIPROTOCOL TRANSCEIVER
R1 Receiver Input, 5k pull-down
R2 Receiver Input, 5k pull-down
R3 Receiver Input, 5k pull-down
R4 Receiver Input, 5k pull-down
R5 Receiver Input, 5k pull-down
This pin has a 400k pull-up to Vcc in both RS-232 and RS-485 modes.
This pin has a 400k pull-up to Vcc in both RS-232 and RS-485 modes.
Receiver enable for both RS-232 and RS-485/422 mode (Active low)
Mode select, either RS-232 (low) or RS-485/422 (high) mode
R2 Receiver Output
R4 Receiver Output
R5 Receiver Output
T3 Driver TTL input
T3 Driver Output
T1 Driver Output
T2 Driver Output
The pull-up is disabled in the SP337EU shutdown mode.
The pull-up is disabled in the SP337EU shutdown mode.
RS-232
Negative Terminal of Negative Flying Capacitor
Positive Terminal of Negative Flying Capacitor
Negative Terminal of Positive Flying Capacitor
Positive Terminal of Positive Flying Capacitor
Power Supply Voltage, between 3.3V and 5V
X*
X*
3
Vdd Storage Capacitor
Vss Storage Capacitor
R1 Receiver Output
R3 Receiver Output
D
ESCRIPTION
Ground
R1(A) Receiver Non-Inverting Input
R3(A) Receiver Non-Inverting Input
R1(B) Receiver Inverting Input
R3(B) Receiver Inverting Input
T3(Y) Non-Inverting Output
T1(Y) Non-Inverting Output
T3(Z) Inverting Output
T1(Z) Inverting Output
T3 Driver TTL input
Only RS-485 mode
RS-485/RS-422
X*
X*
X*
X*
SP337E