Teknik Özellikler
This integrated circuit is a highly integrated USB 2.0 full-speed to four-channel UART bridge controller made by Silicon Labs, which can convert a single USB port into four independent serial communication channels, greatly simplifying multi-serial port equipment wiring and circuit design.
Part Number Definition
CP2108 represents the core model of four-way USB to UART conversion chip. B03 is the fixed hardware version and internal configuration code. GMR stands for 64-pin exposed pad QFN surface mount package plus tape-and-reel reel packaging, which is suitable for automated SMT feeding and mass production assembly.
Core Function and Electrical Parameters
The chip integrates built-in USB transceiver, internal 48MHz oscillator and power management circuit, no external crystal oscillator and USB matching resistance are needed for peripheral circuits. It carries on-chip programmable EEPROM, allowing users to burn customized VID, PID, device serial number and port configuration information directly through USB without extra programming equipment. Four completely independent UART channels are equipped, each channel supports complete modem handshake signals and hardware/software flow control, baud rate range covers common serial communication rates up to 1Mbps. Each UART has independent transmit and receive FIFO cache to prevent data loss during high-speed transmission. Besides serial ports, 16 configurable general GPIO pins are reserved for indicator light control, external switch signal input and simple peripheral drive. The working input voltage ranges from 3.0V to 3.6V, typical operating current is 56mA, and the quiescent current under suspend low-power state is only 460μA, which meets the power consumption requirements of battery-powered portable devices. The official free virtual serial port driver can identify the chip as four separate COM ports on computer terminals, and no secondary development of host software is required for original serial program adaptation.
Packaging and Assembly Specifications
The product adopts 64-VFQFN exposed thermal pad package with overall size 9mm×9mm. It belongs to MSL3 moisture sensitive device, and reflow soldering construction must be finished within 168 hours after opening the original vacuum packaging. The standard reel packaging contains 2500 pieces per reel, matching the feeding specification of fully automatic placement machines on production lines.
Environmental and Compliance Standards
The stable working temperature range is -40℃ to +85℃, adapting to industrial field control equipment, outdoor monitoring terminals and conventional intelligent electronic devices. The whole production process adopts lead-free technology and complies with mainstream international environmental control norms. High integration reduces the number of peripheral components and the occupied area of PCB layout.
Tipik Uygulama Alanları
Industrial multi-channel RS485/RS232 data acquisition modules and multi-node sensor networking gateways Server equipment multi-serial port debugging expansion card and cabinet monitoring communication board POS cash register equipment, multi-port access control system and intelligent cabinet centralized communication unit Instrument and test equipment with multiple serial interfaces and automated production line signal acquisition terminals Embedded host multi-channel download debugging interface and wired communication centralized transfer equipment
LXB Semicon supplies original Silicon Labs CP2108-B03-GMR four-channel USB to UART bridge IC
