C8051F064 - 25MHz 8051 Mixed-Signal MCU | Silicon Labs
MPN: C8051F064 ✓ ActiveC8051F064 Overview
A microcontroller is a programmable system-on-chip combining a processor core, nonvolatile memory, digital I/O, timers, serial interfaces, and analog peripherals. The C8051F06x family combines the legacy-compatible 8051 instruction set with mixed-signal resources. Within the broader hierarchy, it is a microcontroller, then an embedded processor, then an integrated circuit and semiconductor. Its analog integration is particularly useful for compact industrial-control and measurement designs that need sampling, threshold comparison, and voltage generation in one package.
Key features include 25 MHz processing, 64 KB of Flash program memory, 59 digital I/O pins, two integrated 16-bit 1 Msps ADCs according to the family description, a 12-bit DAC, and three integrated comparators. The 100-pin TQFP provides 59 digital I/O pins for the C8051F060, C8051F062, C8051F064, and C8051F066 members of the family. The combination of flash storage, mixed-signal conversion, and abundant I/O supports control-loop, acquisition, and communications functions on a single PCB.
The C8051F06x architecture is designed around the powerful 8051 core with 25 MHz performance. Its two 16-bit, 1 Msps ADCs support sampled analog measurements, while the 12-bit DAC provides an analog output derived from software-defined data. Three comparators support threshold detection and monitoring functions. This mixed-signal arrangement allows a single device to collect sensor information, evaluate comparator thresholds, generate an analog reference or control voltage, and manage external equipment through digital interfaces.
Typical uses include industrial sensor acquisition, process-control panels, laboratory instrumentation, environmental monitoring, embedded analog control, and communication-oriented control modules. For a 16-bit, 1 Msps conversion stage, the firmware can sample rapidly enough for many measurement and monitoring tasks, although the overall system timing also depends on the selected pins, peripherals, firmware execution, and front-end conditioning.
Designers should follow the manufacturer datasheet for the exact 100-pin assignments, oscillator requirements, analog-pin recommendations, and decoupling configuration. The complete pin map is not present in the supplied verified text, so this page does not infer individual pin names. PCB planning should reserve clean analog routing, solid ground distribution, suitable input impedance, and appropriate filtering between external sensors and the integrated ADC inputs.
This page consolidates the verified distributor listing, family-level mixed-signal specifications, package information, and same-package alternatives into an engineering-focused selection guide. It also distinguishes confirmed C8051F06x family options from cross-brand replacements, helping designers identify candidates without mistaking a broadly similar microcontroller for a verified pin-compatible substitute.
Drop-in alternatives for C8051F064 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with C8051F064 (same form factor and footprint) — differing in Package, ADC Channel Count, ADC Resolution, DAC, DAC Resolution.
C8051F060-GQ
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F062-GQ
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F066-GQ
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F061-GQ
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F063-GQ
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F067-GQ
✅ Drop-In📋 Reference alternative (not in catalog)
C8051F064 Maximum Ratings & Electrical Characteristics
| Microcontroller Type | 8-bit mixed-signal microcontroller (MCU) |
| Processor Core | 8051 core |
| Maximum Clock Frequency | 25 MHz |
| Flash Memory | 64 KB (64K x 8) |
| ADC Resolution | 16 bit |
| ADC Channel Count | 1 channel per cited device description |
| ADC Sampling Rate | 1 Msps |
| Family Integrated ADC Count | 2 ADCs |
| DAC Resolution | 12 bit |
| Integrated Comparator Count | 3 |
| Digital I/O Pin Count | 59 |
| Package | 100-pin TQFP (14 mm x 14 mm) |
| Mounting Type | Surface mount |
| In-System Programming | ISP Flash MCU |
C8051F064 100-pin tqfp (14 mm x 14 mm) Pin Configuration Guide
Pin configuration for C8051F064 (100-pin tqfp (14 mm x 14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for C8051F064.
Refer to the datasheet for full pin configuration.
Typical Applications
C8051F064 is suitable for 6 applications: Industrial Sensor Acquisition, Precision Process Control, Laboratory Instrumentation, Environmental Monitoring, Analog Signal Control Module, Embedded Communication Controller.
Industrial Sensor Acquisition
The C8051F064 fits compact industrial sensor-acquisition equipment because its 16-bit, 1 Msps ADC can capture analog measurements while the 25 MHz 8051 core performs filtering, scaling, and control. Its 59 digital I/O pins allow simultaneous connection of sensors, threshold inputs, status indicators, and communications signals. Use the integrated ADC with a suitable front end, reference, grounding scheme, and anti-alias filtering rather than treating conversion speed as the complete accuracy specification. The 64 KB of Flash also provides more room for calibration tables, conversion routines, diagnostics, and protocol handling than an 8 KB-class MCU. For industrial deployment, verify the ordering suffix's temperature and qualification requirements before releasing the design.
Recommended
Precision Process Control
The C8051F064 is appropriate for a compact closed-loop process controller because the 25 MHz 8051 core can execute control calculations while the 16-bit, 1 Msps ADC samples process feedback. The three comparators provide fast threshold functions for limits, alarms, or fault detection, and the 12-bit DAC can generate an analog actuator command. Its 59 digital I/O pins support encoder inputs, relay drivers, sensor enables, and communication interfaces. The principal design trade-off is that loop timing, DAC settling, and ADC acquisition depend on the selected internal peripherals and firmware schedule, which must be verified against the manufacturer datasheet rather than inferred from headline speed figures.
Recommended
Laboratory Instrumentation
The C8051F064 can serve as the control and measurement core of laboratory instrumentation requiring broad analog and digital capability. Its 16-bit ADC supports higher-resolution measurement than a conventional 8-bit control MCU, while 1 Msps conversion speed allows sampling of time-varying signals. The 59 I/O pins are useful for front-panel controls, range relays, trigger signals, status LEDs, and data links, and the 12-bit DAC supports reference or stimulus generation. For accurate instrument performance, place analog and digital return paths appropriately, provide stable references, isolate sensitive inputs, and validate gain and noise behavior at the system level rather than relying only on nominal converter resolution.
Recommended
Environmental Monitoring
The C8051F064 fits environmental monitoring systems that combine several slow or medium-speed sensor inputs with local thresholding and communications. Its 16-bit ADC can capture suitably conditioned signals from temperature, humidity, gas, or pressure sensors, while three comparators can support independent warning thresholds. The 59 digital I/O pins provide ample connections for sensor enables, alarm outputs, local displays, and communications. The 1 Msps ADC specification is useful headroom for a sampled measurement, but power consumption, sleep behavior, and the required operating temperature range are not present in the verified snippets. Those parameters should be confirmed before designing a battery-operated or remote field unit.
Recommended
Analog Signal Control Module
The C8051F064 is well suited to a configurable analog signal-control module because it integrates acquisition, comparison, and DAC output functions. A controller can sample an incoming analog quantity with the 16-bit ADC, evaluate limits using the three comparators, and produce an output with the 12-bit DAC. The 25 MHz core leaves room for calibration and control code, and the 100-pin TQFP offers substantial I/O capacity for references, multiplexers, amplifiers, and digital interfaces. Because converter resolution does not by itself specify absolute accuracy, the design should evaluate offset, gain error, noise, reference stability, and output settling using the manufacturer's characterization data and a representative analog front end.
Recommended
Embedded Communication Controller
The C8051F064 can serve as the supervisory controller in an embedded communication system that also performs analog monitoring. Its 59 digital I/O pins can be assigned to serial interfaces, handshake signals, indicators, and service controls, while the mixed-signal resources can monitor a power rail or equipment condition. The 64 KB Flash configuration provides space for a communication stack, protocol handlers, diagnostics, and data buffering, and the 25 MHz core provides processing headroom for protocol overhead. The supplied verified data does not identify particular UART, SPI, CAN, or Ethernet peripherals, so designers must confirm the required interfaces and their alternate-pin assignments in the manufacturer datasheet before claiming communication compatibility.
Recommended
Recommended Products Summary
Engineering reference data for C8051F064 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | C8051F060-GQ | C8051F062-GQ | C8051F066-GQ | C8051F061-GQ | C8051F063-GQ | C8051F067-GQ |
|---|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14 mm x 14 mm) | 100-pin TQFP - same package family | 100-pin TQFP - same package family | 100-pin TQFP - same package family | 100-pin TQFP - same package family | 100-pin TQFP - same package family | 100-pin TQFP - same package family |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Processor Core | 8-bit 8051 | 8-bit 8051 family | 8-bit 8051 family | 8-bit 8051 family | 8-bit 8051 family | 8-bit 8051 family | 8-bit 8051 family |
| Maximum Clock Frequency | 25 MHz | 25 MHz family performance | 25 MHz family performance | 25 MHz family performance | 25 MHz family performance | 25 MHz family performance | 25 MHz family performance |
| Digital I/O Pins | 59 | 59 | 59 | 59 | 24 | 24 | 24 |
| Program Memory Type | ISP Flash | ISP Flash family | ISP Flash family | ISP Flash family | ISP Flash family | ISP Flash family | ISP Flash family |
Key Differentiators
- Larger verified Flash configuration within the same mixed-signal family (vs C8051F062-GQ)
- Full 59-pin digital I/O resource set (vs C8051F061-GQ)
- Mixed-signal integration reduces external converter count (vs C8051F067-GQ)
Design Notes
Reserve the complete 100-pin TQFP footprint and verify every analog, power, ground, oscillator, programming, and alternate-function connection against the exact manufacturer pinout before routing. The supplied verified text confirms the 100-pin package and 59 I/O pins but does not provide individual pin assignments. In particular, confirm which package pins are usable ADC inputs, comparator inputs, DAC outputs, oscillator nodes, and programming signals. PCB symbol and layout decisions should not be based on assumed continuity between the C8051F060, C8051F062, C8051F064, and C8051F066 variants.
Treat analog and digital return currents as separate paths within the board design. Place analog ground and digital ground connections according to the manufacturer recommendation, keep converter inputs away from high-current switching nodes and clock edges, and use a continuous ground reference beneath the device where the package allows. The 16-bit ADC can capture small signals, but poor grounding, reference noise, input leakage, and source impedance can dominate real measurement error. Prototype the sensor front end, reference network, and filtering before committing to the final component values and enclosure.
Do not assume that two C8051F06x devices with the same 100-pin TQFP package are automatically interchangeable. Verify Flash capacity, number of usable I/O pins, analog pin multiplexing, ADC or DAC availability, oscillator configuration, and the meaning of any no-connect positions. The supplied family description separates 59-I/O members such as the C8051F064 from 24-I/O members such as C8051F061 and C8051F063. This 35-pin difference can invalidate a replacement even when the mechanical footprint is identical.
Calculate the analog and digital supply budget before fixing the external regulator and decoupling network. Use the manufacturer's required supply range and decoupling values for the selected ordering suffix, because neither the operating voltage range nor supply current was available in the verified snippets. Provide local high-frequency bypass capacitance at the appropriate supply pins, maintain a low-impedance ground return, and isolate sensitive analog references from switching noise. If the DAC drives an external filter or amplifier, include its loading and output-current requirements in the power and reference design.
Confirm that the required communication peripherals and alternate pin functions exist on the selected C8051F06x member and are available on its particular pins. The verified text does not identify UART, SPI, CAN, or Ethernet resources, so a design must not infer them from the 8051 family name. Before firmware development, create a pin-budget table covering analog channels, serial interfaces, programming pins, interrupts, debug functions, and any alternate-function restrictions. This prevents late PCB changes and avoids programming pins being assigned to conflicting board functions.
Compliance Information
The supplied verified results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance must be confirmed using the manufacturer product documentation for the exact C8051F064 ordering suffix.
