C8051F321 - 25MHz 16KB Flash USB 2.0 MCU | Silicon Labs
부품 번호: C8051F321 ✓ 활성C8051F321 개요
A microcontroller is a programmable system-on-chip that combines a CPU core, memory, analog peripherals, digital I/O, and communication interfaces. The C8051F321 belongs to the 8-bit microcontroller category and specifically to the C8051F32x family, combining the familiar 8051 instruction architecture with enhanced peripherals, Flash ISP programming, USB connectivity, and mixed-signal measurement capability.
Key features include 25 MIPS execution, 16 KB Flash, a 10-bit ADC with up to 200 ksps conversion performance, 21 I/O ports, and a USB 2.0 full-speed function controller with on-chip clock recovery. The integrated USB transceiver removes the need for a separate USB PHY in direct USB applications. A selectable reference can be supplied from an external VREF pin, VDD, or the internal reference, while an external conversion-start input supports triggered measurement systems.
The pipelined 8051 core provides high throughput for its 8-bit class, while the dedicated USB controller handles enumeration and low-speed or full-speed USB traffic in firmware. The 16 KB Flash capacity suits compact control systems, USB interface accessories, data-acquisition nodes, and human-interface-device designs where code size is moderate but peripheral integration and USB connectivity are valuable.
Typical applications include USB-to-serial adapters, HID controllers, industrial data-acquisition modules, programmable instrumentation, USB-connected sensor nodes, and embedded control boards requiring analog measurement alongside digital communications. Designers should verify the exact package variant and exposed-pad requirements against the manufacturer datasheet before layout release, and must confirm USB impedance, decoupling, and firmware-driver requirements.
This page consolidates verified manufacturer and distributor information, package-specific ordering data, and practical selection guidance for engineers evaluating the C8051F321 in embedded USB and mixed-signal designs.
드롭인 대체품: C8051F321 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: C8051F321 (동일 폼 팩터 및 풋프린트) — 차이점: ADC Resolution, Flash Memory, Package, Product Type.
C8051F320
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →C8051F322
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
C8051F323
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
C8051F324
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
C8051F325
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
C8051F321 최대 정격 & 전기적 특성
| Product Type | 8-bit mixed-signal microcontroller (MCU) |
| 최대 클록 주파수 | 25 MHz |
| Maximum CPU Throughput | 25 MIPS |
| Core Architecture | Pipelined 8051 core |
| Flash Memory | 16 KB (16K x 8) |
| 동작 공급 전압 | 2.7 V to 3.6 V |
| ADC Resolution | 10 bits |
| ADC Maximum Sampling Rate | 200 ksps |
| ADC Input Configuration | 13 external single-ended or differential inputs |
| ADC Reference Options | External VREF pin, internal reference, or VDD |
| USB Interface | USB 2.0 function controller with integrated transceiver and on-chip clock recovery |
| Number of I/O Ports | 21 |
| External Conversion Start | External conversion-start input |
| Built-in Temperature Sensor | Available through the ADC reference and measurement peripherals |
| 패키지 | 28-MLP QFN (5 x 5 mm) |
| 실장 유형 | Surface mount |
| RoHS Compliance | RoHS compliant |
| Lifecycle Stage | Active |
C8051F321 28-mlp qfn (5 x 5 mm) 핀 구성 가이드
C8051F321(28-mlp qfn (5 x 5 mm) 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: C8051F321.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
C8051F321 적합 용도: 6 애플리케이션s: USB HID Control Peripherals, USB Data-Acquisition Modules, Industrial Sensor Interface Nodes, Programmable Test and Measurement Instruments, USB-to-Serial and Protocol Adapters, Compact Embedded Control Systems.
USB HID Control Peripherals
The C8051F321 is well suited to USB-connected keyboards, control panels, and other human-interface devices because it combines an integrated USB 2.0 transceiver with a 25 MIPS pipelined 8051 core. The on-chip USB function controller reduces the external interface component count, while 16 KB of Flash provides space for enumeration, descriptor, and input/output routines. Designers should use a dedicated USB-capable 8051 firmware configuration, confirm endpoint requirements, and follow the datasheet's transceiver routing and impedance guidance.
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USB Data-Acquisition Modules
A 10-bit ADC capable of 200 ksps, 13 external single-ended or differential inputs, and multiple reference choices make the C8051F321 practical for compact USB measurement modules. The ADC can be triggered through its external conversion-start input, helping synchronize acquisition with an external sensor or test sequence. The 25 MIPS core can manage sampling control and USB transfer, although the 16 KB Flash limit and 2.7 V to 3.6 V operating range must be checked against the application.
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Industrial Sensor Interface Nodes
The C8051F321 can act as a compact sensor-interface node that gathers analog measurements through its 10-bit ADC and forwards data over USB. Differential input support may simplify interface arrangements for sensors with balanced outputs, while selectable VREF options permit reference planning around the analog subsystem. Firmware can use the 25 MIPS pipelined core for acquisition and packet preparation. The design should still include appropriate input protection, filtering, calibration, and decoupling selected from the manufacturer data sheet.
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Programmable Test and Measurement Instruments
Integrated USB and a fast successive-approximation ADC allow the C8051F321 to serve as the control core of compact programmable measurement equipment. It can accept external single-ended or differential signals, use an external or internal reference, and synchronize conversion through the external start input. The 25 MIPS throughput supports responsive control and data handling. Engineers should budget Flash space for calibration tables, USB descriptors, and protocol code, and validate analog accuracy across the intended input range.
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USB-to-Serial and Protocol Adapters
A compact USB adapter can use the C8051F321's integrated USB 2.0 controller as the host-side interface while a UART or other serial peripheral connects to the external protocol. This integration avoids a separate USB transceiver and is useful for configuration bridges, legacy equipment adapters, and service tools. The designer must allocate the appropriate 8051 peripherals, USB endpoints, and firmware buffers, and verify whether 16 KB of Flash is sufficient for the protocol stack and boot logic.
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Compact Embedded Control Systems
The combination of a 25 MHz pipelined 8051 core, 21 I/O ports, 16 KB Flash, and integrated analog conversion supports compact embedded controllers that combine digital outputs with limited measurement functions. A typical implementation could monitor switches or sensors, perform a control action, and expose diagnostics through USB. The C8051F321 is most attractive where firmware is modest, USB is required, and an external MCU ecosystem is already established. Validate pin multiplexing and port availability in the exact package variant before schematic release.
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추천 제품 요약
엔지니어링 참조 데이터: C8051F321 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | C8051F320 | C8051F322 | C8051F323 | C8051F324 | C8051F325 |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 28-MLP QFN (5 x 5 mm) | 28-MLP QFN (5 x 5 mm) | 28-MLP QFN (5 x 5 mm) | 28-MLP QFN (5 x 5 mm) | 28-MLP QFN (5 x 5 mm) | 28-MLP QFN (5 x 5 mm) |
| CPU Architecture | Pipelined 8051 core | Pipelined 8051 family architecture | Pipelined 8051 family architecture | Pipelined 8051 family architecture | Pipelined 8051 family architecture | Pipelined 8051 family architecture |
| Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| ADC Resolution | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits |
| ADC Maximum Sampling Rate | 200 ksps | 200 ksps | 200 ksps | 200 ksps | 200 ksps | 200 ksps |
| USB 2.0 Function Controller | Yes, with integrated transceiver and on-chip clock recovery | C8051F32x family configuration; verify device-specific USB resources | C8051F32x family configuration; verify device-specific USB resources | C8051F32x family configuration; verify device-specific USB resources | C8051F32x family configuration; verify device-specific USB resources | C8051F32x family configuration; verify device-specific USB resources |
주요 차별점
- Integrated USB transceiver and clock recovery (vs C8051F320)
- High-speed mixed-signal conversion capability (vs C8051F325)
- Deterministic 8-bit control performance (vs C8051F322)
설계 노트
Route the USB D+ and D- pair as a controlled-impedance differential pair on the C8051F321 board, keeping the pair short, continuous, and away from switching nodes and analog inputs. Follow the manufacturer's transceiver and layout guidance in the C8051F320/C8051F321 data sheet for trace geometry, grounding, and component placement. Because the supplied verified data does not include a complete pinout, verify USB pin locations and the exposed-pad connection against the exact C8051F321-GM package drawing before releasing copper.
Decouple each VDD supply domain with the capacitance and placement specified by the manufacturer data sheet, and provide a stable reference for both the MCU and the 10-bit ADC. The C8051F321 operates from 2.7 V to 3.6 V, so analog input excursion, USB transceiver supply behavior, and digital output levels must be evaluated against that range. The ADC reference can be external, internal, or VDD; choose it according to measurement accuracy and noise requirements rather than defaulting blindly.
Do not assume that any same-family C8051F32x device is an automatic MCU replacement. Even when the package and core are similar, Flash size, USB endpoints, UART resources, port multiplexing, analog channels, and firmware configuration can differ. Build a migration matrix against the C8051F320/C8051F321 data sheet, recompile with the correct device definition, and verify boot, USB enumeration, analog calibration, and all peripheral pin assignments before substituting a part.
규정 준수 정보
The verified C8051F321 specification listing identifies the device as RoHS compliant. REACH, lead-free, halogen-free, and conflict-minerals declarations were not included in the supplied verified data and are therefore left unknown. AEC-Q100 qualification is not applicable to this general-purpose microcontroller based on the supplied information.
