CP2108-B01-GMR - USB-to-Quad-UART Bridge | Silicon Labs | 64-QFN
부품 번호: CP2108-B01-GMR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.65 | $66.50 |
| 100 | $5.4 | $540.00 |
| 500 | $4.78 | $2,390.00 |
| 1,000 | $4.35 | $4,350.00 |
CP2108-B01-GMR 개요
A USB bridge controller is a mixed-signal interface IC that converts between USB protocol on the host side and asynchronous serial (UART) protocol on the device side, enabling microcontrollers and legacy RS-232/RS-485 peripherals to communicate over USB without an external PHY or complex firmware stack. Within the broader taxonomy, the CP2108 is a USB-to-UART bridge, a subclass of USB interface ICs, which falls under interface ICs and, ultimately, integrated circuits for power management and data connectivity.
Key features include four independent UART channels with data rates from 300 baud to 2 Mbaud, support for hardware and software flow control (XON/XOFF, RTS/CTS, DTR/DSR), GPIO pins (GPIO.0 through GPIO.15) for modem signals or general purpose I/O, royalty-free virtual COM port (VCP) drivers for Windows/Mac/Linux, and an integrated 5 V to 3.3 V LDO that allows bus-powered or self-powered operation directly from the USB VBUS rail.
The CP2108 uses an internal 48 MHz oscillator plus PLL, eliminating the need for an external crystal on most designs. An on-die OTP ROM of 512 bytes holds customizable USB descriptor fields (VID, PID, serial number, manufacturer string), letting OEMs configure the device for plug-and-play without external EEPROM. The exposed-pad QFN-64 package keeps the thermal resistance (theta_JA) low enough for industrial temperature operation without additional heatsinking.
Typical applications include industrial multi-port serial hubs, point-of-sale (POS) terminals, RS-485 multi-drop building automation networks, USB-to-RS-232 dongles with quad-port expansion, embedded development boards exposing four UART debug channels to a single USB-C port, and instrumentation with multiple serial peripherals. The four-channel design is particularly compelling where engineers previously stacked multiple single-channel CP2102/CP2103 bridges.
When designing with this part, place a 4.7 uF X5R ceramic bypass capacitor on VBUS and a 1 uF X5R on VIO, both within 3 mm of their respective pins, and stitch the exposed pad with at least eight thermal vias to an inner ground plane. Tie any unused GPIO pins to GND through 100 kohm resistors to avoid floating inputs on the UART lines, and update the OTP via the Silicon Labs CP210x production tools for field-installed units.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found directly in the manufacturer datasheet, providing comparison views and FAQ content designed to be quotable by engineers and AI assistants.
드롭인 대체품: CP2108-B01-GMR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: CP2108-B01-GMR (동일 폼 팩터 및 풋프린트) — 차이점: Package, RoHS Status, Supply Voltage, Flow Control, Integrated Functions.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
CP2108-B03-GMR
✅ 드롭인✓ 재고 있음
$4.61 / 개
데이터시트 보기 →CP2108-B02-GMR
✅ 드롭인✓ 재고 있음
$3.7827 / 개
데이터시트 보기 →CP2108-B01-GM
✅ 드롭인✓ 재고 있음
가격 문의
데이터시트 보기 →CP2108-B01-GMR 사양
| 기능 | USB to Quad UART Bridge Controller |
| USB Specification | USB 2.0 Full-Speed (12 Mbps) |
| Number of UART Channels | 4 |
| UART Data Rate | 300 baud to 2 Mbaud |
| Supply Voltage (VBUS) | 3.0 V to 5.25 V |
| Internal LDO Output | 3.3 V (on-chip regulator) |
| I/O Voltage (VIO) | 1.8 V to 3.3 V (level shifters) |
| GPIO Pins | 16 (GPIO.0 to GPIO.15) |
| On-chip OTP Memory | 512 bytes |
| Internal Oscillator | 48 MHz (no external crystal required) |
| Flow Control | Hardware (RTS/CTS, DTR/DSR) and software (XON/XOFF) |
| 패키지 | 64-pin QFN EP, 9 mm x 9 mm |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40C to +85C |
| RoHS 상태 | Compliant |
| Drivers | Royalty-free VCP drivers (Windows, macOS, Linux) |
CP2108-B01-GMR 64-pin qfn ep, 9 mm x 9 mm 핀 구성 가이드
CP2108-B01-GMR(64-pin qfn ep, 9 mm x 9 mm 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: CP2108-B01-GMR.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
CP2108-B01-GMR 적합 용도: 7 애플리케이션s: Industrial Multi-Port Serial Hubs, Point-of-Sale (POS) Terminals, USB-to-RS-485 Multi-Drop Networks, Embedded Development Boards, Test and Measurement Instrumentation, USB Dongles with Quad-Port Expansion, LED Lighting & DMX Controllers.
Industrial Multi-Port Serial Hubs
The CP2108-B01-GMR fits industrial multi-port serial hubs because it exposes four independent UART channels over a single USB 2.0 full-speed link with data rates up to 2 Mbaud, replacing up to four discrete single-channel bridges and saving ~75% of PCB area. Its -40C to +85C operating range matches factory-floor thermal budgets, while the on-chip 5 V to 3.3 V LDO eliminates external regulators typically required to power discrete bridges from the VBUS rail. Placed as the upstream interface of a hub PCB between the USB-C receptacle and four DB9 line drivers, the CP2108 enables a BOM count of one bridge IC versus four while supporting RS-232 or RS-485 transceivers directly. The integrated 512-byte OTP ROM customizes VID/PID/serial strings for the OEM hub without adding an external I2C EEPROM, further reducing component count on cost-sensitive hub designs.
추천
Point-of-Sale (POS) Terminals
POS terminals require multiple serial peripherals (MSR, EMV card reader, receipt printer, customer display) that traditionally need several USB-to-UART chips. The CP2108-B01-GMR consolidates these four peripherals onto one USB bridge with independent baud-rate configuration per channel (300 baud to 2 Mbaud), letting each POS peripheral communicate at its native data rate without compromise. The on-chip 3.3 V LDO draws power directly from VBUS, supporting bus-powered POS terminals that comply with USB 2.0 full-speed power budgets. Soft-flow control (XON/XOFF) and hardware-flow control (RTS/CTS) are both supported, accommodating legacy peripherals that rely on modem signals. Its 64-pin QFN EP (9x9 mm) package drops onto a small footprint inside compact POS enclosures where board space is at a premium.
추천
USB-to-RS-485 Multi-Drop Networks
Building-automation and lighting-control networks use RS-485 multi-drop topologies to communicate with several nodes over a single twisted pair, and the CP2108-B01-GMR provides a USB gateway with four UARTs that can each attach to an RS-485 transceiver. Each channel sustains up to 2 Mbaud, comfortably handling DMX512, Modbus RTU, and BACnet MS/TP traffic. The integrated 48 MHz internal oscillator removes a known shock/vibration failure mode from field installations by eliminating the external crystal common on competing bridges. Using the CP2108 reduces the host-side BOM to a single bridge and four small RS-485 transceivers, while the -40C to +85C rating supports outdoor gateway cabinets. Programmable GPIO pins can drive direction-control signals for half-duplex transceivers without needing a separate microcontroller.
추천
Embedded Development Boards
Embedded development platforms often expose multiple UART debug channels (Linux console, Bluetooth HCI, sensor I/O, JTAG-over-UART) to a single USB port, and the CP2108-B01-GMR delivers four UARTs in a 9x9 mm QFN footprint. Royalty-free VCP drivers across Windows, macOS, and Linux eliminate per-platform driver porting, letting developers use serial terminals like minicom, PuTTY, or screen without vendor glue. Each UART supports independent baud rates, so debug logs can run at 115200 baud while sensor data streams at higher rates. The on-chip 512-byte OTP ROM supports custom VID/PID enumeration to distinguish a vendor's board in a competitive market without external EEPROM wiring. Combined with the wide -40C to +85C operating range, the CP2108 is well suited for industrial-grade development kits.
추천
Test and Measurement Instrumentation
Test-and-measurement instruments including bench oscilloscopes, signal generators, and bench multimeters expose multiple serial ports to a host PC for SCPI command and data-streaming interfaces. The CP2108-B01-GMR provides four full-duplex UARTs in a single USB endpoint, allowing one instrument to expose four logical devices (spectrum analyzer, signal generator, multimeter data, and trigger) over a single upstream USB-C connection. Hardware flow control (RTS/CTS) prevents buffer overflow at higher baud rates used in continuous streaming mode up to 2 Mbaud. The integrated 3.3 V LDO derived from VBUS lets engineers simplify their power-tree to one or two regulators, lowering BOM cost in compact bench instruments. Its exposed-pad QFN package provides thermal headroom up to 85C ambient without external heatsinks.
추천
USB Dongles with Quad-Port Expansion
Designers building quad-port USB-to-serial dongles for laptop users (broadcast engineers, automation technicians, hardware designers with multiple legacy devices) need a single bridge that maps to four DB9 connectors. The CP2108-B01-GMR collapses what previously required four single-channel bridges (CP2102 or CP2103) into one 64-pin QFN EP chip, reducing BOM to one part per dongle. The on-chip 5 V to 3.3 V LDO supports USB bus-powered dongles that comply with the 500 mA USB 2.0 budget. Customization is easy - Silicon Labs' Xpress Configurator reads back each dongle's VID/PID over the existing USB link for re-tagging in the field, simplifying OEM logistics and helping distributors manage inventory under multiple customer SKUs.
추천
LED Lighting & DMX Controllers
DMX512 lighting controllers rely on RS-485 half-duplex differential signaling at 250 kbaud, and the CP2108-B01-GMR lets a USB host treat up to four DMX universes as four independent virtual COM ports. Each UART can be wired to a half-duplex RS-485 transceiver whose direction-control signal is driven by a CP2108 GPIO, eliminating the need for a separate MCU on simple controllers. The -40C to +85C rating accommodates fanless controller enclosures used in architectural lighting installations. With the integrated OTP ROM, designers can program a unique serial string per universe to support seamless port enumeration in lighting-desk software like Capture or LightFactory, allowing fixture builders to swap dongles without manual driver reconfiguration.
추천
추천 제품 요약
엔지니어링 참조 데이터: CP2108-B01-GMR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | CP2108-B03-GMR | CP2108-B02-GMR | CP2108-B01-GM |
|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 64-QFN EP (9x9 mm) | 64-QFN EP (9x9 mm) - same | 64-QFN EP (9x9 mm) - same | 64-QFN EP (9x9 mm) - same |
| Function | USB to Quad-UART bridge | USB to Quad-UART bridge | USB to Quad-UART bridge | USB to Quad-UART bridge |
| USB Speed | USB 2.0 Full-Speed (12 Mbps) | USB 2.0 Full-Speed (12 Mbps) | USB 2.0 Full-Speed (12 Mbps) | USB 2.0 Full-Speed (12 Mbps) |
| UART Channels | 4 | 4 | 4 | 4 |
| UART Data Rate | 300 baud to 2 Mbaud | 300 baud to 2 Mbaud | 300 baud to 2 Mbaud | 300 baud to 2 Mbaud |
| Internal Oscillator | 48 MHz (no external crystal) | 48 MHz (no external crystal) | 48 MHz (no external crystal) | 48 MHz (no external crystal) |
| OTP ROM | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| Packaging Format | Tape & Reel (GMR) | Tape & Reel (GMR) | Tape & Reel (GMR) | Tray (GM) |
| Firmware Revision | B01 | B03 (latest) | B02 | B01 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
주요 차별점
- Quad-UART single-chip integration (vs CP2104-F03-GMR)
- No external crystal required (vs FT232H)
- On-chip 512-byte OTP for USB descriptors (vs Generic USB bridges)
설계 노트
Place a 4.7 uF X5R ceramic bypass capacitor on VBUS within 3 mm of pin, and a 1 uF X5R on VIO. The integrated 5 V to 3.3 V LDO sources up to 100 mA from VBUS, sufficient for the silicon core, downstream UART transceivers, and a small LED indicator. For self-powered hubs, drop a 100 nF bypass across each VBUS and VIO pin pair to suppress switching noise from RS-485 transceivers.
The 64-pin QFN EP package exposes the central pad for thermal relief; stitch it with at least eight thermal vias to a continuous inner ground plane. At maximum VBUS (5.25 V) with downstream transceivers drawing 100 mA via the internal LDO, the silicon sees ~0.6 W dissipation, easily managed with a 1-oz copper pour and standard airflow - no external heatsink required.
Keep the D+/D- differential pair matched within 0.15 mm width and 0.5 mm length tolerance per USB 2.0 full-speed routing guidelines. Maintain a 90-ohm differential impedance (with no stubs) from the device pins to the USB connector through an ESD array; place the common-mode choke (if used) within 5 mm of the connector to limit radiated emissions.
Tie any unused GPIO pins to GND through 100 kohm resistors to avoid floating inputs on the UART lines. Do NOT tie them directly to VIO, since firmware may interpret floating pins as inputs and cause spurious interrupts. Ensure the OTP programming sequence is initiated only after VBUS is stable for >=50 ms to avoid partial EEPROM writes that brick the part until reprogramming.
Route USB D+/D- over a continuous reference plane with no plane splits or breaks on the layer below. Keep crystals away from the CP2108 (none needed here) and high-current paths; if adding an external crystal for a legacy design, place it within 5 mm of the XIN/XOUT pads and use a guard ring tied to GND. Verify the silicon revision in the OTP header when retrofitting boards from a B01 era to a B03 build.
규정 준수 정보
RoHS compliant per CP2108 datasheet and GlobalSpec listing. Not AEC-Q100 qualified - this is a commercial/industrial-grade part. Halogen-free status not explicitly stated in the verified web data, marked as unknown.
