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NXP Semiconductors P87C51FC-4A,512
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- Part No.:
- P87C51FC-4A,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P87C51FC-4A,512.pdf
- Description:
- IC MCU 8BIT 32KB OTP 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
P87C51FC-4A,512 from Philips Semiconductors is an 8-bit OTP microcontroller based on the 80C51 architecture, featuring 32KB on-chip program memory, 512 bytes of RAM, a programmable counter array (PCA), and full-duplex enhanced UART. It operates at up to 33 MHz with 2.7–5.5 V supply, supporting motor control, industrial I/O, and embedded communication systems.
For engineers reviewing the P87C51FC-4A,512 datasheet, P87C51FC-4A,512 pinout, P87C51FC-4A,512 application, or P87C51FC-4A,512 equivalent, this device requires attention to its 44-pin PLCC package, PCA-based PWM/timing capabilities, dual DPTR register, and security bit configuration for secure firmware deployment.
Technical Context
The P87C51FC-4A,512 implements the standard 80C51 instruction set with architectural enhancements including a 5-channel programmable counter array (PCA) for capture/compare/PWM, hardware watchdog timer, and enhanced UART with framing error detection and automatic address recognition. Its interrupt structure supports four priority levels and seven sources.
It uses advanced CMOS process technology enabling full static operation, low-power idle and power-down modes, and ALE inhibition for reduced EMI. The device supports external memory expansion up to 64 KB via multiplexed address/data bus on Port 0 and high-order address on Port 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with identical instruction set and SFR mapping |
| Program Memory | 32 KB OTP - non-volatile, one-time programmable code storage with 3-bit security lock |
| RAM Size | 512 bytes internal RAM - double the capacity of base 80C51, enabling larger data buffers and stack depth |
| Max Clock Frequency | 33 MHz - enables 33 million instructions per second (MIPS) at 5 V, with full static operation down to 0 Hz |
| Operating Voltage | 2.7–5.5 V - supports battery-powered and mixed-voltage system integration without level-shifting |
| I/O Ports | Four 8-bit bidirectional ports (P0–P3) - P0 and P2 serve dual role for external memory interfacing |
| Timer/Counter Resources | Three 16-bit timers + 5-channel PCA - enables simultaneous PWM generation, input capture, and event counting |
Pinout & Package
Package: 44-pin Plastic Leaded Chip Carrier (PLCC), SOT187-2 footprint, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 I/O / AD0–AD7 | Open-drain bidirectional port; multiplexed low-order address/data bus during external memory access |
| P1.0–P1.7 | Port 1 I/O / T2, T2EX, ECI, CEX0–CEX4 | Dedicated PCA channel I/O - supports 5 independent capture/compare/PWM functions |
| P2.0–P2.7 | Port 2 I/O / A8–A15 | Bidirectional port with internal pull-ups; outputs high-order address during 16-bit external memory access |
| P3.0–P3.7 | Port 3 I/O / RxD, TxD, INT0–INT1, T0–T1, WR, RD | Secondary function port - provides serial interface, external interrupts, and memory control strobes |
| RST | Reset Input | Active-high asynchronous reset requiring ≥2 machine cycles (24 oscillator periods) for reliable initialization |
| XTAL1/XTAL2 | Oscillator Inputs | Crystal or external clock input pair - supports 0–33 MHz operation with internal inverting amplifier |
| EA/VPP | External Access Enable / Programming Voltage | High = execute from internal OTP; low = fetch from external program memory; 12.75 V required for programming |
| ALE/PROG | Address Latch Enable / Programming Pulse | Outputs 1/6 oscillator frequency for external latch timing; doubles as EPROM programming pulse |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Counter Array (PCA) | 5 independent channels support simultaneous PWM generation, input capture, and software timers - critical for motor phase control and encoder decoding |
| Enhanced UART | Framing error detection and automatic address recognition enable robust multi-drop RS-485 communication without host CPU overhead |
| Second DPTR Register | Enables efficient block memory moves between external data spaces without reloading pointer registers - accelerates data transfer in protocol stacks |
| Low-EMI Operation | Configurable ALE inhibit reduces radiated emissions during high-noise industrial operation - meets EN55022 Class B requirements |
| Security Bits | 3-bit OTP lock prevents unauthorized readout of firmware - essential for protecting proprietary control algorithms |
| Power Management | Idle and Power-Down modes reduce current to <100 µA - extends battery life in remote sensor nodes |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Closed-loop speed and position control of BLDC motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Primary controller executing PID loops, generating 3-phase PWM via PCA channels, and managing Hall sensor feedback. Use Value: On-chip 32 KB OTP stores calibrated motor profiles; 512-byte RAM accommodates real-time current/voltage sampling buffers. |
Use Scenario: Residential electricity meter with tariff switching, tamper detection, and RS-485 communication to utility head-end. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC interface, LCD driver, EEPROM logging, and secure DLMS/COSEM protocol stack. Use Value: Hardware watchdog ensures fail-safe shutdown on firmware crash; enhanced UART handles multi-drop meter reading without external transceivers. |
| Factory Automation I/O Module | Medical Diagnostic Equipment |
Use Scenario: DIN-rail mounted digital I/O module with 16-channel isolated inputs and 8-channel relay outputs. IC Role / Device Role / Timing Role: Real-time I/O scheduler coordinating opto-isolator timing, debounce logic, and Modbus RTU over RS-485. Use Value: Four priority-level interrupts allow deterministic response to emergency stop signals within ≤2 µs latency. |
Use Scenario: Portable ultrasound front-end controller managing time-of-flight calculations, display refresh, and USB HID interface. IC Role / Device Role / Timing Role: Timing-critical subsystem synchronizing analog beamforming clocks, ADC sampling triggers, and frame buffer updates. Use Value: Full static operation allows clock gating during idle ultrasound scan phases - reducing thermal load in handheld enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P87C51RA+4A | 64 KB OTP, 1024-byte RAM, integrated hardware watchdog timer | Higher memory and RAM suit complex protocol stacks; watchdog adds safety-critical reset capability | Select when firmware exceeds 32 KB or system-level fault recovery is mandated |
| P89C51RD2FA | 64 KB Flash, ISP-capable, 1024-byte RAM, same PLCC-44 package | Field-upgradable firmware eliminates need for UV erasers or socket programming | Select for production environments requiring post-deployment firmware updates or NPI flexibility |
Compared with P87C51FC-4A,512, P87C51RA+4A offers greater memory headroom and built-in watchdog reliability, while P89C51RD2FA trades OTP permanence for field-programmable Flash - making it preferable for iterative development or maintenance-sensitive deployments.
Availability
P87C51FC-4A,512 is available at Aetrix Electronics and suitable for industrial motor control, smart metering, factory automation I/O modules, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for P87C51FC-4A,512 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Philips Semiconductors (now NXP Semiconductors) is a global leader in high-reliability embedded ICs, with decades of expertise in automotive, industrial, and consumer microcontrollers.
The P87C51FC-4A,512 belongs to the 8XC51FA/FB/FC family - designed specifically for cost-sensitive, high-volume industrial control applications requiring OTP security, extended temperature operation, and legacy 8051 software compatibility.
FAQ
What is the maximum operating frequency of the P87C51FC-4A,512?
The P87C51FC-4A,512 supports a maximum clock frequency of 33 MHz when operated at 5 V. At lower supply voltages (2.7–3.6 V), the maximum rated frequency is 16 MHz per the Philips specification document dated August 2000. This rating ensures timing margin compliance across voltage and temperature ranges.
Does the P87C51FC-4A,512 include a hardware watchdog timer?
No, the P87C51FC-4A,512 does not integrate a hardware watchdog timer. That feature is present in the later 8XC51RA+/RB+/RC+/RD+ family (e.g., P87C51RA+4A), but not in the 8XC51FA/FB/FC series. Designers must implement software-based or external watchdog solutions when using the P87C51FC-4A,512.
What package type is used for the P87C51FC-4A,512?
The P87C51FC-4A,512 is supplied in a 44-pin Plastic Leaded Chip Carrier (PLCC) package, designated SOT187-2 in Philips documentation. It features a square body with J-leads, compatible with standard surface-mount reflow processes and socket-based programming fixtures.
How much internal RAM does the P87C51FC-4A,512 provide?
The P87C51FC-4A,512 integrates 512 bytes of on-chip RAM, which is double the 256-byte RAM found in earlier 8XC51FA/FB devices and the base 80C51. This expanded RAM supports larger stack usage, intermediate calculation buffers, and protocol packet handling without external memory.
Can the P87C51FC-4A,512 execute code from external memory?
Yes, the P87C51FC-4A,512 can execute code from external program memory when the EA/VPP pin is held low. With EA low, the device fetches instructions starting at address 0000H from external ROM/EPROM. When EA is high, it executes from internal 32 KB OTP up to address 7FFFH, then accesses external memory beyond that range.
P87C51FC-4A,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 87C
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- EBI/EMI, UART/USART
- Peripherals:
- POR, PWM
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P87C51FC-4A,512 FAQ
1.How can I place an order for P87C51FC-4A,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87C51FC-4A,512 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P87C51FC-4A,512 reliable?
The price and inventory of P87C51FC-4A,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87C51FC-4A,512 is usually 5 days.
3.What payment methods are accepted for P87C51FC-4A,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87C51FC-4A,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87C51FC-4A,512?
P87C51FC-4A,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87C51FC-4A,512 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P87C51FC-4A,512?
For technical support, including P87C51FC-4A,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87C51FC-4A,512 requirements.
6.How does Aetrix verify that P87C51FC-4A,512 is sourced from the original manufacturer or authorized distributors?
All P87C51FC-4A,512 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P87C51FC-4A,512 meets industry standards.
7.What is the process for return or replacement of P87C51FC-4A,512?
All P87C51FC-4A,512 units undergo pre-shipment inspection (PSI). If there is an issue with P87C51FC-4A,512, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P87C51FC-4A,512 part is unused and in its original packaging.
Return procedure for P87C51FC-4A,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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