CP2108 Data Sheet GND GPIO.0 – GPIO.15 D+ VBUS

1 CP2108 Data SheetThe CP2108 is a highly integrated USB to Quad UART BridgeController providing a simple solution for updating RS-232/RS-485 designs to USB using a minimum of components andPCB CP2108 includes a USB full-speed function controller, USB transceiver, oscilla-tor, EEPROM, and four asynchronous serial data buses (UART) with full modem con-trol signals in a compact 9 mm x 9 mm 64-pin QFN package. The on-chip EEPROMmay be used to customize the USB Vendor ID (VID), Product ID (PID), product descrip-tion string, power descriptor, device release number, interface strings, device serialnumber, modem and GPIO configuration as desired for applications. All customizationand configuration options can be selected using a simple GUI-based configurator. Byeliminating the need for complex firmware and driver development, the CP2108 devi-ces enable quick USB connectivity with minimal development is ideal for a wide range of applications, including the following:KEY FEATURES No firmware development required Simple GUI-based configurator Integrated USB transceiver; no externalresistors required Integrated clock.

2 No external crystalrequired USB full-speed compatible Four independent UART interfaces 16 GPIOs with configurable options Royalty free Virtual COM port (VCP)drivers Instrumentation Industrial control Servers Point-of-Sale productsCP210880 MHz OscillatorVBUSD+D-GNDUSB Connector( V to VDD)UARTn (0-3)USB InterfacePeripheral Function ControllerFull-Speed 12 Mbps TransceiverEEPROM(Product Customization)Handshake Control6RX(0-3)TX(0-3)RTS(0-3)CTS(0-3)DT R(0-3)DSR(0-3)RI(0-3)DCD(0-3)Clock DividerVREGINVDDVSSVIOVBUSD+D-I/O Power and Logic Levels UART0-2, GPIO, SUSPEND, RESET18 Regulator/RESETBaud Rate GeneratorConnect to VBUS or External SupplyDataFIFOUART0 UART1 UART2 UART3( to V)VIOHigh Drive UART 3(Pins 1-6) | Building a more connected 1. Feature List and Ordering Information2108 B RTape and Reel (Optional)Firmware RevisionHardware Revision03 CPGMP ackage Type QFN64 Temperature Grade 40 to +85 C (G)Silicon Labs Xpress Product LineInterface Family, USB-to-Quad-UART BridgeFigure CP2108 Part NumberingThe CP2108 devices have the following features: Single-Chip USB-to-QUAD UART Data Transfer Four independent UART interfaces Integrated USB transceiver; no external resistor required Integrated clock; no external crystal required Integrated programmable EEPROM for storing customiza-ble product information On-chip power-on reset circuit On-chip voltage regulator: V output USB Peripheral Function Controller USB Specification compliant.

3 Full-speed (12 Mbps) USB suspend states supported via SUSPEND pins Virtual COM Port Drivers Works with existing COM port PC applications Royalty-free distribution license Supported on Windows, Mac, and Linux Supply Voltage Self-powered: to V USB bus powered: to V VIO voltage: to VDD VIOHD voltage: to 6 V UART Interface Features Each UART interface supports the following: Supports hardware flow control (RTS/CTS) Supports all modem control signals Data formats supported: Data bits: 5, 6, 7, and 8 Stop bits: 1, , and 2 Parity: odd, even, set, mark and none Baud rates: 300 bps to 2 Mbps UART 3 (pins 1 6) supports interfacing to devices up to 6 V GPIO Interface Features Total of 16 GPIO pins with configurable options Suspend pin support Usable as inputs, open-drain or push-pull outputs 4 configurable clock outputs for external devices RS-485 bus transceiver control Toggle LED upon transmission Toggle LED upon reception Package Options RoHS-UART 3 compliant 64-pin QFN (9x9 mm) Temperature Range 40 to +85 C Ordering Part Number CP2108 -B03-GMCP2108 Data SheetFeature List and Ordering | Building a more connected | 2 Table of Contents1.

4 Feature List and Ordering System Electrical Electrical Recommended Operating UART, GPIO, and Suspend I/O Electrical Reset Electrical Voltage USB Absolute Maximum Thermal Throughput and Flow Pin QFN64 Package QFN64 Package QFN64 PCB Land QFN64 Package Typical Connection USB Function Controller and Asynchronous Serial Data Bus (UART) Baud Rate GPIO and UART GPIO Alternate Clock GPIO Transmit and Receive RS-485 Transceiver Bus Hardware Flow Control (RTS and CTS).. High Drive Pins UART 3 Pins 1 Internal CP2108 Device Virtual COM Port (VCP) Driver Driver Relevant Application Notes and Revision | Building a more connected | Revision Revision Revision Revision | Building a more connected | 42. System OverviewThe CP2108 is a highly integrated USB-to-Quad-UART Bridge Controller providing a simple solution for updating RS-232/RS-485 de-signs to USB using a minimum of components and PCB space.

5 The CP2108 includes a USB full-speed function controller, USBtransceiver, oscillator, EEPROM, and four asynchronous serial data buses (UART) with full modem control signals in a compact 9 x 9mm QFN-64 package (sometimes called MLF or MLP ).The on-chip EEPROM may be used to customize the USB Vendor ID (VID), Product ID (PID), Product Description String, Power De-scriptor, Device Release Number, Interface Strings, Device Serial Number, Modem, and GPIO configuration as desired for OEM appli-cations. The EEPROM is programmed on-board via the USB, allowing the programming step to be easily integrated into the productmanufacturing and testing Virtual COM Port (VCP) device drivers provided by Silicon Labs allow a CP2108 -based product to appear as four COMports in PC applications. The CP2108 UART interfaces implement all RS-232/RS-485 signals including control and handshaking, soexisting system firmware does not need to be modified.

6 The device also features a total of sixteen GPIO signals that can be user-de-fined for status and control information. See for the latest application notes and product support informationfor the evaluation kit for the CP2108 is available. It includes a CP2108 -based USB-to-UART/RS-232 evaluation board, a complete set ofVCP device drivers, USB and RS-232 cables, and full documentation. Contact a Silicon Labs sales representative or go to to order the CP2108 Evaluation Data SheetSystem | Building a more connected | 53. Electrical Electrical CharacteristicsAll electrical parameters in all tables are specified under the conditions listed in Recommended Operating Conditions, unless sta-ted Recommended Operating ConditionsVDD= to V, 40 to +85 C unless otherwise Recommended Operating Conditions1 ParameterSymbolTest ConditionMinTypMaxUnitOperating Supply Voltage Supply Voltage Supply Voltage VDDVO perating Supply Voltage Current Normal 3 IDD 56 mASupply Current Suspended 3 IDDBus Powered 460 ASelf Powered 330 ASupply Current - USB Pull-up 4 IPU 200228 AOperating Ambient TemperatureTA-40 85 COperating Junction TemperatureTJ-40 105 voltages are with respect to applies only when using the regulator.

7 When not using the regulator, VREGIN and VDD are tied together externally and it isallowable for VREGIN to be equal to the device is connected to the USB bus, the USB pull-up current should be added to the supply current to calculate total re-quired USB pull-up supply current values are calculated values based on USB specifications. CP2108 Data SheetElectrical | Building a more connected | UART, GPIO, and Suspend I/O Electrical CharacteristicsVDD= to V, VIO= V to VDD, VIOHD = V to V, 40 to +85 C unless otherwise UART, GPIO, and Suspend I/OParameterSymbolTest ConditionMinTypMaxUnitOutput High Voltage(All pins except High Drive UART 3pins 1 6)VOHVIO VOutput High Voltage(High Drive UART 3 pins 1 6)VOHVIOHD VOutput Low Voltage(All pins except High Drive pins 1 6)VOLLow DriveIOL = 3 mA Low Voltage(High Drive pins 1 6)VOLHigh DriveIOL = mA High VIO VInput Low VoltageVIL Pull-up Current(VIN = 0 V)IPUVIO = V-30-20-10 AWeak Pull-up Current UART 3(pins 1 6)

8 IPUVIOHD = V-15-10-5 AVIOHD = V-30-20-10 GPIO 40 to +85 C unless otherwise GPIO Output SpecificationsParameterSymbolTest ConditionMinTypMaxUnitRS-485 Active Time After Stop BittACTIVE 1 bit time1TX Toggle RatefTXTOG 15 HzRX Toggle RatefRXTOG 15 HzClock Output RatefCLOCK~158k 20 is calculated as 1 / baud rate. CP2108 Data SheetElectrical | Building a more connected | Reset Electrical Characteristics 40 to +85 C unless otherwise ResetParameterSymbolTest ConditionMinTypMaxUnitPower-On Reset (POR) ThresholdVPORR ising Voltage on VDD VFalling Voltage on Ramp TimetRMPTime to VDD V10 3000 s/RESET Input High VIO V/RESET Input Low VoltageVILRESET Low Time to Generate aSystem ResettRSTL50 Voltage Regulator 40 to +85 C unless otherwise Voltage RegulatorParameterSymbolTest ConditionMinTypMaxUnitOutput Voltage (at VDD pin) Current (at VDD pin)1 IDDOUT 150mAOutput Load RegulationVDDLR CapacitanceCVDD1 10 is the total current the voltage regulator is capable of providing.

9 Any current consumed by the CP2108 reduces the currentavailable to external devices powered from VDD. CP2108 Data SheetElectrical | Building a more connected | USB Transceiver 40 to +85 C unless otherwise USB TransceiverParameterSymbolTest ConditionMinTypMaxUnitValid Supply Range(for USB Compliance) Pull-Down Leakage CurrentIVBUSLVBUS = 5 V, VIO = V 10 AVBUS Detection Input VIO VTransmitterOutput High VOutput Low VoltageVOL Crossover ImpedanceZDRVD riving High 38 Driving Low 38 Pull-up ResistanceRPUFull Speed (D+ Pull-up)Low Speed (D- Pull-up) Output Rise TimeTRLow Speed75 300nsFull Speed4 20nsOutput Fall TimeTFLow Speed75 300nsFull Speed4 20nsReceiverDifferential InputSensitivityVDI| (D+) - (D-) | VDifferential Input Common Leakage CurrentILPull-ups Disabled < ARefer to the USB Specification for timing diagrams and symbol Data SheetElectrical | Building a more connected | Absolute Maximum RatingsStresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device.

10 This is a stress rating onlyand functional operation of the devices at those or any other conditions above those indicated in the operation listings of this specifica-tion is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. For more information onthe available quality and reliability data, see the Quality and Reliability Monitor Report at Absolute Maximum RatingsParameterSymbolTest ConditionMinMaxUnitAmbient Temperature Under BiasTBIAS-55125 CStorage TemperatureTSTG-65150 CVoltage on VDDVDDVSS on VREGINVREGINVSS on VBUSVBUSVIO VVSS < VVSS + on VIOVIOVSS on VIOHDVIOHDVSS on /RESETVINVIO VVSS < VVSS + on GPIO or UART pinsVINGPIO/UART pins except 1-6 VSS + pins 1-6 VSSHD + on D+ or D-VINVIO VVSS < VVSS + Current Sunk into Supply PinsISUPPVDD, VREGIN, VIO,VIOHD 400mATotal Current Sourced out of GroundPinsIVSS400 mACurrent Sourced or Sunk by Any I/OPinIPIOUART,GPIO,Suspend I/O, /RESET ex-cept for UART 3 pins1 6-100100mAUART 3 pins 1 6-300300mACurrent Injected on Any I/O PinIINJUART,GPIO,Suspend I/O.