PL-2303 ETC, PL-2303 Datasheet - Page 5

• Manufacturer Part Number: PL-2303
• Description: PL-2303 USB to RS-232 Bridge Controller
• Manufacturer: ETC

Overview
The PL-2303 operates as a bridge between one USB port and one standard RS232 Serial port. The two
large on-chip buffers accommodate data flow from two different buses. The USB bulk-type data is adopted
for maximum data transfer. Automatic handshake is supported at the Serial port. With these, a much higher
baud rate can be achieved compared to the legacy UART controller.
This device is also compliant with USB power management and remote wakeup scheme. Only minimum
power is consumed from the host during Suspend. By integrating all the function in a SOIC-28 package, this
chip is suitable for cable embedding. Users just simply hook the cable into PC or hub’s USB port, and then
they can connect to any RS-232 devices.
Pin Description
PL-2303 Product Datasheet
Pin
No.
10
11
12
13
14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
8
9
TXD
DTR_N
RTS_N
VDD_232
RXD
RI_N
GND
VDD
DSR_N
DCD_N
CTS_N
SHTD_N
EE_CLK
EE_DATA
DP
DM
VDD_3V3
GND_3V3
RESET
VDD
GND
Name
Type
I/O
I/O
I/O
I/O
O
O
O
O
P
P
P
P
P
P
P
I
I
I
I
I
I
Table 1. Pins Description
Data output to Serial port
Data Terminal Ready, active low
Request To Send, active low
RS-232 VDD. The RS-232 output signals (Pin 1 ~ Pin 3) are
designed for 5V, 3.3V or 3V operation. VDD_232 should be
connected to the same power level of the RS-232 interface.
(The RS-232 input signals are always 5V~3V tolerant.)
Note: This document version only provides 5V DC characteristic
information. Refer to future revisions for updates.
Data input from Serial Bus
Ring Indicator, active low
Ground
Power
Data Set Ready, active low
Data Carrier Detect, active low
Clear To Send, active low
Shut Down RS232 Transceiver
During Reset, this pin is input for simulation purpose. During
normal operation, this pin is Serial ROM clock
Serial ROM data signal
USB DPLUS signal
USB DMINUS signal
3.3V power for USB transceiver
3.3V ground
System Reset
Power
Ground
- 5 -
Description
Document Revision 1.3
ds_pl2303_v14
Release Date:
July, 2002