Data Sheet

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CP2102

SINGLE-CHIP USB TO UART BRIDGE

Single-Chip USB to UART Data Transfer

Integrated USB transceiver; no external resistors

required

- Integrated clock; no external crystal required

- Integrated 1024-Byte EEPROM for vendor ID, product

ID, serial number, power descriptor, release number,

and product description strings

- On-chip power-on reset circuit

- On-chip voltage regulator: 3.3 V output

- 100% pin and software compatible with CP2101

USB Function Controller

USB Specification 2.0 compliant; full-speed (12 Mbps)

- USB suspend states supported via SUSPEND pins

Asynchronous Serial Data BUS (UART)

All handshaking and modem interface signals

- Data formats supported:

- Data bits: 5, 6, 7, and 8

- Stop bits: 1, 1.5, and 2

- Parity: odd, even, mark, space, no parity

- Baud rates: 300 bps to 1 Mbits

- 576 Byte receive buffer; 640 byte transmit buffer

- Hardware or X-On/X-Off handshaking supported

- Event character support

- Line break transmission

Virtual COM Port Device Drivers

Works with Existing COM Port PC Applications

- Royalty-Free Distribution License

- Windows Vista/XP/Server 2003/2000/98SE

- Mac OS-X / OS-9

- Linux

USBXpress™ Direct Driver Support

Royalty-Free Distribution License

- Windows Vista/XP/Server 2003/2000

- Windows CE 5.0 and 4.2

Example Applications

Upgrade of RS-232 legacy devices to USB

- Cellular phone USB interface cable

- PDA USB interface cable

- USB to RS-232 serial adapter

Supply Voltage

Self-powered: 3.0 to 3.6 V

- USB bus powered: 4.0 to 5.25 V

Package

Lead free 28-pin QFN (5 x 5 mm)

Ordering Part Number

CP2102-GM

Temperature Range: –40 to +85 °C

Figure 1. Example System Diagram

CP2102

3.3 V

Voltage

Regulator

48 MHz

Oscillator

OUT

SUSPEND

REGIN

GND

RST

D+

D-

UART

DCD

CTS

RTS

RXD

TXD

DSR

DTR

External RS-232

transceiver or

UART circuitry

(to external circuitry

for USB suspend

states)

VBUS

D-

D+

GND

USB

CONNECTOR

VDD

VBUS

USB Function

Controller

USB

Transceiver

640B

Buffer

576B

Buffer

1024B

EEPROM

VDD

D1 D2 D3

Summary of content (18 pages)

PAGE 1
CP2102 SINGLE-CHIP USB TO UART BRIDGE Single-Chip USB to UART Data Transfer - Integrated USB transceiver; no external resistors required - Integrated clock; no external crystal required - Integrated 1024-Byte EEPROM for vendor ID, product ID, serial number, power descriptor, release number, and product description strings - On-chip power-on reset circuit - On-chip voltage regulator: 3.3 V output - 100% pin and software compatible with CP2101 USB Function Controller - USB Specification 2.
PAGE 2
CP2102 NOTES: 2 Rev. 1.
PAGE 3
CP2102 TABLE OF CONTENTS Section Page 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3. Global DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 4. Pinout and Package Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
CP2102 1. System Overview The CP2102 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS-232 designs to USB using a minimum of components and PCB space. The CP2102 includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, and asynchronous serial data bus (UART) with full modem control signals in a compact 5 x 5 mm QFN-28 package. No other external USB components are required.
PAGE 5
CP2102 3. Global DC Electrical Characteristics Table 2. Global DC Electrical Characteristics VDD = 3.0 to 3.6 V, –40 to +85 °C unless otherwise specified. Parameter Conditions Supply Voltage Min Typ Max Units 3.0 3.3 3.6 V Supply Current1 Normal Operation; VREG Enabled — 20 26 mA Supply Current1 Suspended: VREG Enabled — 80 100 µA — 200 228 µA –40 — +85 °C Supply Current - USB Pull-up2 Specified Operating Temperature Range Notes: 1.
PAGE 6
CP2102 4. Pinout and Package Definitions Table 5. CP2102 Pin Definitions Name Pin # Type VDD 6 Power In Description 3.0–3.6 V Power Supply Voltage Input. Power Out 3.3 V Voltage Regulator Output. See Section 9. GND 3 RST 9 D I/O Device Reset. Open-drain output of internal POR or VDD monitor. An external source can initiate a system reset by driving this pin low for at least 15 µs. REGIN 7 Power In 5 V Regulator Input. This pin is the input to the on-chip voltage regulator.
PAGE 7
DTR DSR TXD RXD RTS CTS NC 27 26 25 24 23 22 GND 28 CP2102 DCD 1 21 NC RI 2 20 NC GND 3 19 NC D+ 4 18 NC D- 5 17 NC VDD 6 16 NC REGIN 7 15 NC CP2102 Top View 8 9 10 11 12 13 14 VBUS RST NC SUSPEND SUSPEND NC NC GND Figure 2. QFN-28 Pinout Diagram (Top View) Rev. 1.
PAGE 8
CP2102 14 13 12 11 15 6 16 D2 5 D2 2 17 e 4 2 20 21 22 23 24 25 26 27 DETAIL 1 28 1 18 19 E2 2 3 R 6xe E 10 9 Table 6. QFN-28 Package Dimensions L 7 E2 b 8 Bottom View 6xe D A A2 Side View A1 e A3 A A1 A2 A3 b D D2 E E2 e L N ND NE R AA BB CC DD DETAIL 1 CC DD BB AA Figure 3. QFN-28 Package Drawing 8 Rev. 1.2 MIN 0.80 0 0 — 0.18 — 2.90 — 2.90 — 0.45 — — — 0.09 — — — — MM TYP 0.90 0.02 0.65 0.25 0.23 5.00 3.15 5.00 3.15 0.5 0.55 28 7 7 — 0.435 0.435 0.
PAGE 9
CP2102 0.30 mm 0.50 mm 0.85 mm 0.35 mm 0.50 mm 0.10 mm 0.20 mm 0.20 mm 0.50 mm Top View b 0.20 mm D D2 Optional GND Connection L e E2 0.20 mm 0.30 mm 0.50 mm 0.85 mm 0.35 mm 0.10 mm E Figure 4. Typical QFN-28 Landing Diagram Rev. 1.
PAGE 10
CP2102 0.30 mm 0.35 mm 0.50 mm 0.60 mm 0.20 mm 0.10 mm 0.85 mm 0.50 mm 0.20 mm 0.20 mm 0.50 mm Top View 0.60 mm 0.30 mm 0.70 mm b 0.20 mm e L E2 0.20 mm 0.30 mm 0.50 mm 0.85 mm 0.35 mm 0.10 mm E Figure 5. Typical QFN-28 Solder Paste Diagram 10 Rev. 1.2 D D2 0.
PAGE 11
CP2102 5. USB Function Controller and Transceiver The Universal Serial Bus function controller in the CP2102 is a USB 2.0 compliant full-speed device with integrated transceiver and on-chip matching and pull-up resistors. The USB function controller manages all data transfers between the USB and the UART as well as command requests generated by the USB host controller and commands for controlling the function of the UART.
PAGE 12
CP2102 6. Asynchronous Serial Data Bus (UART) Interface The CP2102 UART interface consists of the TX (transmit) and RX (receive) data signals as well as the RTS, CTS, DSR, DTR, DCD, and RI control signals. The UART supports RTS/CTS, DSR/DTR, and X-On/X-Off handshaking. The UART is programmable to support a variety of data formats and baud rates. If the Virtual COM Port drivers are used, the data format and baud rate are set during COM port configuration on the PC.
PAGE 13
CP2102 Table 8. Default USB Configuration Data Name Value Vendor ID 10C4h Product ID EA60h Power Descriptor (Attributes) 80h Power Descriptor (Max. Power) 32h Release Number 0100h Serial Number 0001 (63 characters maximum) Product Description String “CP2102 USB to UART Bridge Controller” (126 characters maximum) 8. CP2102 Device Drivers There are two sets of device drivers available for the CP2102 devices: the Virtual COM Port (VCP) drivers and the USBXpress Direct Access drivers.
PAGE 14
CP2102 9. Voltage Regulator The CP2102 includes an on-chip 5 to 3 V voltage regulator. This allows the CP2102 to be configured as either a USB bus-powered device or a USB self-powered device. These configurations are shown in Figure 7 and Figure 8. When enabled, the 3 V voltage regulator output appears on the VDD pin and can be used to power external 3 V devices. See Table 9 for the voltage regulator electrical characteristics.
PAGE 15
CP2102 CP2102 From VBUS VBUS VBUS Sense From 5 V Power Net REGIN 5 V In Voltage Regulator (REG0) 3 V Out To 3V Power Net VDD Device Power Net Figure 8. Configuration 2: USB Self-Powered CP2102 From VBUS VBUS VBUS Sense REGIN 5 V In Voltage Regulator (REG0) 3 V Out From 3 V Power Net VDD Device Power Net Figure 9. Configuration 3: USB Self-Powered, Regulator Bypassed Rev. 1.
PAGE 16
CP2102 10. Relevant Application Notes The following Application Notes are applicable to the CP2102. The latest versions of these application notes and their accompanying software are available at: http://www.silabs.com/products/microcontroller/applications.asp. AN144: CP210x Device Customization Guide. This application note describes how to use the AN144 software to configure the USB parameters on the CP2102 devices. AN169: USBXpress Programmer's Guide.
PAGE 17
CP2102 DOCUMENT CHANGE LIST Revision 1.0 to Revision 1.1 Updated “Linux 2.40” bullet on page 1. Changed MLP to QFN throughout. Revision 1.1 to Revision 1.2 Added additional supported operating systems on page 1. Changed VDD conditions of Tables 2 and 3 from a minimum of 2.7 to 3.0 V. Updated typical and max Supply Current number in Table 2. Removed tantalum requirement in Figure 6. Consolidated Sections 8 and 9. Added Section "10. Relevant Application Notes" on page 16. Rev. 1.
PAGE 18
CP2102 CONTACT INFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: MCUtools@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.