CP2101EK View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

CP2101EK

SINGLE-CHIP USB TO UART BRIDGE

Silicon Laboratories 

CP2101

1. System Overview

The CP2101 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 CP2101 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.

The on-chip EEPROM may be used to customize the USB Vendor ID, Product ID, Product Description

String, Power Descriptor, Device Release Number and Device Serial Number as desired for OEM applica-

tions. The EEPROM is programmed on-board via the USB allowing the programming step to be easily inte-

grated into the product manufacturing and testing process.

Royalty-free Virtual COM Port (VCP) device drivers provided by Silicon Laboratories allow a CP2101-

based product to appear as a COM port to PC applications. The CP2101 UART interface implements all

RS-232 signals, including control and handshaking signals, so existing system firmware does not need to

be modified. In many existing RS-232 designs, all that is required to update the design from RS-232 to

USB is to replace the RS-232 level-translator with the CP2101. Direct access driver support is available

through the Silicon Laboratories USBXpress driver set.

The CP2101 is a mature product and is not recommended for new designs. The CP2102 is a pin and soft-

ware compatible alternative for the CP2101. The CP2102 is recommended for all new designs. Contact

Silicon Laboratories customer support at www.silabs.com for any questions about replacing the CP2101.

2. Absolute Maximum Ratings

Table 2.1. Absolute Maximum Ratings

Parameter

Conditions

Min

Typ

Max Units

Ambient temperature under bias

–55

—

125

°C

Storage Temperature

–65

—

150

°C

Voltage on any I/O Pin or RST with respect to

GND

–0.3

—

5.8

V

Voltage on VDD with respect to GND

–0.3

—

4.2

V

Maximum Total current through VDD and GND

—

—

500

mA

Maximum output current sunk by RST or any

I/O pin

—

—

100

mA

Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the devices at those or any other conditions above those

indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

Rev. 1.8

5

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