PL2303 Datasheet, PDF (5/11 Pages) List of Unclassifed Manufacturers – PL-2303 USB to RS-232 Bridge Controller Product Datasheet

Release Date:
July, 2002
ds_pl2303_v14
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
Pin
Name
No.
1 TXD
2 DTR_N
3 RTS_N
4 VDD_232
5 RXD
6 RI_N
7 GND
8 VDD
9 DSR_N
10 DCD_N
11 CTS_N
12 SHTD_N
13 EE_CLK
14 EE_DATA
15 DP
16 DM
17 VDD_3V3
18 GND_3V3
19 RESET
20 VDD
21 GND
Table 1. Pins Description
Type
Description
O Data output to Serial port
O Data Terminal Ready, active low
O Request To Send, active low
P 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.
I Data input from Serial Bus
I Ring Indicator, active low
P Ground
P Power
I Data Set Ready, active low
I Data Carrier Detect, active low
I Clear To Send, active low
O Shut Down RS232 Transceiver
I/O During Reset, this pin is input for simulation purpose. During
normal operation, this pin is Serial ROM clock
I/O Serial ROM data signal
I/O USB DPLUS signal
I/O USB DMINUS signal
P 3.3V power for USB transceiver
P 3.3V ground
I System Reset
P Power
P Ground
PL-2303 Product Datasheet
-5-
Document Revision 1.3