EFM8UB20F64G-B-QFN32R - 48MHz 8051 USB MCU, 64kB Flash | Silicon Labs
MPN: EFM8UB20F64G-B-QFN32R ✓ Hoạt độngEFM8UB20F64G-B-QFN32R Tóm tắt
A Universal Bee 8-bit MCU is a small-form-factor microcontroller that combines a legacy-compatible 8051 instruction set with modern peripherals such as USB, I2C/SMBus, SPI, and UART. It belongs to the broader category of embedded microcontrollers, which sit below microprocessors and microprocessors with caches in the system hierarchy: microcontroller -> embedded controller -> IC. Universal Bee parts specifically target cost-sensitive USB-enabled applications where 8-bit density, deterministic interrupt response, and USB 2.0 full-speed (12 Mbps) connectivity outweigh the throughput of 32-bit Cortex-M0/M0+ alternatives.
Key features of the EFM8UB20F64G-B-QFN32R include the USB 2.0 full-speed device controller with on-chip transceiver, a 10-bit 200 ksps differential SAR ADC, two on-chip low-current analog comparators with adjustable reference, brown-out reset and supply supervisor, and a hardware cipher engine for AES-128. The 32-QFN package measures 5x5 mm with an exposed pad for low thermal impedance. The device supports 2.7 V to 5.25 V supply, making it directly compatible with battery and USB bus-powered designs.
Typical applications for this part are USB HID peripherals (keyboards, mice, game controllers), USB-to-UART bridges, USB CDC virtual COM ports, industrial sensor interfaces, and low-cost consumer appliances needing USB connectivity. The combination of 64 kB code space and USB in a compact 32-QFN makes it especially attractive for space-constrained dongles and wearables.
When designing with this MCU, reserve the exposed pad (EP) for a continuous ground plane and connect it to GND through at least four thermal vias. Add a 1 uF and a 100 nF decoupling pair as close as possible to the VDD pin. The USB D+/D- traces must be 90 ohm differential, length-matched within 150 mil, and routed over a continuous ground reference for impedance control.
This page synthesizes distributor pricing, drop-in alternatives from the same EFM8UB2 family, and practical design notes that go beyond what is in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho EFM8UB20F64G-B-QFN32R — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EFM8UB20F64G-B-QFN32R (cùng hình factor và footprint) — khác nhau ở ADC, Package, Digital I/O Pins, PCA Channels, Operating Temperature.
EFM8UB20F64G-B-QFN32
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EFM8UB20F64G-A-QFN32R
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EFM8UB20F64G-A-QFN32
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EFM8UB20F64G-A-QFP48
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EFM8UB20F64G-B-QFN32R Tỷ lệ tối đa & tính chất điện
| Core Processor | CIP-51 8051 (pipelined) |
| Core Size | 8-bit |
| Maximum Clock Speed | 48 MHz |
| Program Memory (Flash) | 64 kB |
| Data RAM (XRAM) | 4 kB |
| Hộp | 32-QFN (5x5 mm) |
| Operating Temperature Grade | -40C to +85C (B grade) |
| Điện áp cung cấp | 2.7 V to 5.25 V |
| Digital I/O Pins | 25 |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) Device with on-chip transceiver |
| ADC | 10-bit differential SAR, 20 channels, 200 ksps |
| Timers | 6 x 16-bit |
| PCA Channels | 5 |
| Analog Comparators | 2 with adjustable reference |
| Communication Peripherals | I2C, SMBus, SPI, UART/USART, USB |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (1,500/reel) |
Cấu hình chân EFM8UB20F64G-B-QFN32R
| Chân 1 | P2.0 — Port 2.0 GPIO |
| Chân 2 | P2.1 — Port 2.1 GPIO |
| Chân 3 | P2.2 — Port 2.2 GPIO |
| Chân 4 | P2.3 — Port 2.3 GPIO |
| Chân 5 | P2.4 — Port 2.4 GPIO |
| Chân 6 | P2.5 — Port 2.5 GPIO |
| Chân 7 | P2.6 — Port 2.6 GPIO |
| Chân 8 | P2.7 — Port 2.7 GPIO |
| Chân 9 | VBUS — USB VBUS sense input |
| Chân 10 | VDD — Supply voltage 2.7-5.25 V |
| Chân 11 | GND — Ground |
| Chân 12 | D+ — USB D+ data line |
| Chân 13 | D- — USB D- data line |
| Chân 14 | RST/C2CK — Reset / C2 clock |
| Chân 15 | P3.0/C2D — Port 3.0 / C2 data |
| Chân 16 | P3.1 — Port 3.1 GPIO |
| Chân 17 | P3.2 — Port 3.2 GPIO |
| Chân 18 | P3.3 — Port 3.3 GPIO |
| Chân 19 | P3.4 — Port 3.4 GPIO |
| Chân 20 | P3.5 — Port 3.5 GPIO |
| Chân 21 | P3.6 — Port 3.6 GPIO |
| Chân 22 | P3.7 — Port 3.7 GPIO |
| Chân 23 | P1.0 — Port 1.0 GPIO |
| Chân 24 | P1.1 — Port 1.1 GPIO |
| Chân 25 | P1.2 — Port 1.2 GPIO |
| Chân 26 | P1.3 — Port 1.3 GPIO |
| Chân 27 | P1.4 — Port 1.4 GPIO |
| Chân 28 | P1.5 — Port 1.5 GPIO |
| Chân 29 | P1.6 — Port 1.6 GPIO |
| Chân 30 | P1.7 — Port 1.7 GPIO |
| Chân 31 | P0.0 — Port 0.0 GPIO |
| Chân 32 | P0.1 — Port 0.1 GPIO |
Ứng dụng tiêu biểu
EFM8UB20F64G-B-QFN32R phù hợp cho 6 Áp dụngs: USB HID Peripherals (Keyboard / Mouse / Game Controller), USB-to-UART Bridge / CDC Virtual COM Port, Industrial Sensor Interface Module, USB Barcode / RFID Reader Dongle, USB Audio Class (UAC) Headset Adapter, USB-Connected Wearable / Fitness Tracker.
USB HID Peripherals (Keyboard / Mouse / Game Controller)
The EFM8UB20F64G-B-QFN32R's integrated USB 2.0 Full-Speed device controller and on-chip transceiver let designers build USB HID peripherals with no external PHY and minimal BOM. Its 48 MHz CIP-51 core scans a 248-key matrix at 1000 Hz while 4 kB XRAM holds HID report buffers, and the 32-QFN 5x5 mm footprint fits inside a slim mouse or dongle enclosure. The 2.7-5.25 V range works directly from a single-cell Li-ion battery or USB bus.
Được đề xuất
USB-to-UART Bridge / CDC Virtual COM Port
The EFM8UB20F64G-B-QFN32R is one of the lowest-cost single-chip USB-to-UART bridges because it carries the CDC class driver in the Silicon Labs SDK and exposes a hardware UART at up to 1 Mbaud. The 64 kB Flash holds command parsers and bootloader logic; 4 kB XRAM buffers CDC packets. Designers add only a USB connector, decoupling caps, and an ESD array such as the IP4220CZ6 to ship a production dongle.
Được đề xuất
Industrial Sensor Interface Module
With 25 digital I/O, a 10-bit differential SAR ADC at 200 ksps, two on-chip analog comparators, and SMBus/I2C/SPI, the EFM8UB20F64G-B-QFN32R aggregates multiple sensor channels and reports over USB. Its -40C to +85C B-grade range suits factory-floor enclosures, and the hardware AES-128 block secures telemetry. The 32-QFN 5x5 mm allows the sensor module to fit inside an M12 connector body.
Được đề xuất
USB Barcode / RFID Reader Dongle
A barcode scanner or HF RFID reader streams bursty bursts to and from the EFM510 that pipes them over USB HID or CDC. The 48 MHz core decodes 1D/2D barcodes in firmware while the integrated USB transceiver eliminates a costly external PHY. The 32-QFN 5x5 mm footprint and sub-5 USD BOM let the reader fit in a compact handheld form factor at retail point-of-sale.
Được đề xuất
USB Audio Class (UAC) Headset Adapter
Engineers can implement a USB audio headset adapter using the EFM8UB20F64G-B-QFN32R's USB FS controller plus an external audio DAC such as the CS42L52-CNZ connected over I2S. The 4 kB XRAM buffers USB audio packets while the 64 kB Flash stores the HID volume buttons. The 32-QFN footprint keeps the adapter smaller than a coin cell.
Được đề xuất
USB-Connected Wearable / Fitness Tracker
Wearables combine a low-cost USB-charged MCU with a sensor hub; the EFM8UB20F64G-B-QFN32R fits that role with 4 kB XRAM for step counts, 6 timers for sensor sampling, and direct USB bus power at 5 V. Its 2.7-5.25 V range accepts Li-ion cells without an LDO, and the 32-QFN 5x5 mm footprint fits inside a 25 mm wearable strap module.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EFM8UB20F64G-B-QFN32R — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | EFM8UB20F64G-B-QFN32 | EFM8UB20F64G-A-QFN32R | EFM8UB20F64G-A-QFN32 | EFM8UB20F64G-A-QFP48 |
|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 32-QFN (5x5 mm) | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 48-QFP - DIFFERENT (not drop-in) |
| Core | CIP-51 8051 8-bit | CIP-51 8051 | CIP-51 8051 | CIP-51 8051 | CIP-51 8051 |
| Clock Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash | 64 kB | 64 kB | 64 kB | 64 kB | 64 kB |
| RAM | 4 kB XRAM | 4 kB | 4 kB | 4 kB | 4 kB |
| USB | USB 2.0 FS device, on-chip transceiver | USB 2.0 FS | USB 2.0 FS | USB 2.0 FS | USB 2.0 FS |
| Temperature Grade | -40C to +85C (B grade) | -40C to +85C (B) | -40C to +85C (A) | -40C to +85C (A) | -40C to +85C (A) |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tray | Tray |
Bảo phân biệt quan trọng
- Single-chip USB FS with on-chip transceiver (vsEFM8UB20F64G-B-QFN32)
- Production-aligned B temperature grade (vsEFM8UB20F64G-A-QFN32R)
- Compact 32-QFN 5x5 mm with full USB HID stack (vsEFM8UB20F64G-A-QFP48)
Ghi chú thiết kế
Connect the exposed pad (EP) of the 32-QFN to a continuous ground plane through at least four thermal vias (0.3 mm drill, 0.5 mm pitch). Place a 1 uF and a 100 nF decoupling pair within 2 mm of the VDD pin (pin 10) and a second 100 nF within 5 mm of the VBUS pin (pin 9) to meet USB in-rush specifications.
Route the USB D+ (pin 12) and D- (pin 13) as a 90 ohm differential pair with length matching within 150 mil microns and over an unbroken ground reference. Avoid routing the pair near switching nodes or crystals; keep total length under 25 mm and add a common-mode choke near the connector if compliance fails.
Do not omit the VBUS pin sense resistor or tie VBUS directly to VDD, because USB hosts can supply 5.25 V transients that exceed the part's absolute maximum. Insert a 10 kohm divider on VBUS to the P3.0/VBUS sense pin and use software to gate USB attach. Also enable the brown-out reset at 3.0 V for bus-powered designs that may brown out at enumeration.
Keep the internal 48 MHz oscillator traces short; if you use an external crystal on XTAL1/XTAL2, place the crystal within 5 mm of the pins with a guard ground ring. The internal oscillator is trimmed for USB Full-Speed accuracy, so most designs can omit the crystal entirely, saving cost and PCB area.
Thông tin tuân thủ
RoHS and lead-free per Silicon Labs EFM8UB2 datasheet and product page. USB-IF compliance testing is the integrator's responsibility. Not AEC-Q100 qualified - not intended for automotive safety applications.