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NXP Semiconductors P80C51FA-4B,557
- Part No.:
- P80C51FA-4B,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
P80C51FA-4B,557.pdf
- Description:
- IC MCU 8BIT ROMLESS 44PQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
P80C51FA-4B,557 from Philips Semiconductors is an 8-bit OTP microcontroller based on the 80C51 architecture, featuring 8 KB ROM, 256 bytes RAM, programmable PCA (Programmable Counter Array), and full-duplex enhanced UART. It operates from 2.7 V to 5.5 V at up to 16 MHz and targets embedded control applications requiring pulse-width modulation, high-speed I/O, and multiprocessor serial communication.
For engineers reviewing the P80C51FA-4B,557 datasheet, P80C51FA-4B,557 pinout, P80C51FA-4B,557 application, or P80C51FA-4B,557 equivalent, key selection criteria include its 44-pin PQFP package, PCA-based capture/compare capability, low-voltage operation down to 2.7 V, and compatibility with standard 80C51 instruction set and toolchains.
Technical Context
The P80C51FA-4B,557 implements a static CMOS 80C51 core with architectural enhancements including a 5-channel PCA for PWM, input capture, and software timers - distinct from basic 8XC54/58 variants lacking PCA. Its enhanced UART supports framing error detection and automatic address recognition for multiprocessor mode.
It supports three power modes: Idle (CPU halted, peripherals active), Stop Clock (oscillator halted, RAM/SFRs retained), and Power Down (oscillator stopped, minimal current draw). Memory addressing extends to 64 KB external space via multiplexed AD0–AD7 and A8–A15 on Ports 0 and 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with identical instruction set and timing |
| ROM Size | 8 KB OTP - non-volatile program storage with security bits and encryption array |
| RAM Size | 256 bytes on-chip - sufficient for stack and data variables in compact control firmware |
| Max Clock Frequency | 16 MHz - enables 1 µs instruction cycle at 12-clock mode for real-time response |
| Supply Voltage | 2.7 V to 5.5 V - supports battery-powered and mixed-voltage industrial systems |
| PCA Channels | 5 independent modules (CEX0–CEX4) - enable simultaneous PWM generation and edge-triggered capture |
| UART Features | Enhanced full-duplex UART with framing error detection and automatic address recognition |
Pinout & Package
Package: 44-pin Plastic Quad Flat Pack (PQFP), SOT307-2 footprint, 10 mm × 10 mm body, 0.8 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | AD0–AD7 / Port 0 | Multiplexed address/data bus for external memory access; open-drain I/O with internal pull-ups when used as GPIO |
| P1.0–P1.7 | T2, T2EX, ECI, CEX0–CEX4 | Dedicated PCA interface pins - support capture, compare, PWM, and external clock input |
| P2.0–P2.7 | A8–A15 / Port 2 | High-order address bus for 16-bit external memory addressing; bidirectional I/O with internal pull-ups |
| P3.0–P3.7 | RxD, TxD, INT0–INT1, T0–T1, WR, RD | Standard 80C51 peripheral signals - UART, external interrupts, timer inputs, and external memory strobes |
| XTAL1 / XTAL2 | Oscillator input/output | Supports crystal (1–16 MHz) or external clock source; enables precise timing for UART and PCA |
| EA/VPP | External Access Enable | When high, executes from internal 8 KB ROM; when low, fetches code from external memory starting at 0000H |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Clock-Out | Configurable output on P1.0 (T2) enables system-level clock distribution without external oscillator |
| Second DPTR Register | Enables efficient block memory moves between external data spaces without register save/restore overhead |
| Asynchronous Port Reset | Ports 1–3 drive to known state immediately upon RST assertion - prevents glitch-induced peripheral activation |
| Low EMI Mode | ALE inhibition reduces electromagnetic emissions during high-noise industrial operation |
| Security Bits & Encryption | 3 OTP security bits + 64-byte encryption array prevent unauthorized firmware readout and cloning |
Applications
| Motor Control System | Industrial PLC I/O Module |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation using feedback from encoder pulses and analog current sensing. IC Role / Device Role / Timing Role: Primary controller executing PID algorithm, generating PWM via PCA channels CEX0–CEX2, and handling serial Modbus RTU communication. Use Value: Integrated 5-channel PCA eliminates need for external PWM ICs; 16 MHz timing resolution supports 10 kHz PWM carrier with 0.1% duty cycle granularity. | Use Scenario: Remote I/O expansion node interfacing with 16 digital inputs and 8 relay outputs in factory automation. IC Role / Device Role / Timing Role: Local intelligence unit managing opto-isolated inputs, driving solid-state relays, and communicating over RS-485 using enhanced UART framing detection. Use Value: Full-duplex UART with automatic address recognition enables reliable multi-drop Modbus networks; 2.7–5.5 V operation accommodates 3.3 V logic and 5 V field-side isolation. |
| Smart Energy Meter | Legacy Equipment Interface Adapter |
Use Scenario: Residential electricity meter with pulse counting, tamper detection, and infrared/RS-485 data upload. IC Role / Device Role / Timing Role: Main MCU acquiring metrology pulses via INT0, timestamping events using PCA capture, and managing secure firmware updates over serial link. Use Value: PCA input capture provides sub-microsecond timestamp accuracy for pulse energy integration; OTP ROM ensures firmware integrity against corruption. | Use Scenario: Protocol translator bridging RS-232 legacy instruments to CAN-based building management systems. IC Role / Device Role / Timing Role: Dual-interface bridge - receives ASCII commands via UART (RxD/TxD), processes command syntax, and formats CAN frames using software-driven bit timing. Use Value: Second DPTR register accelerates ASCII-to-hex conversion and buffer management; 8 KB ROM hosts dual protocol stacks without external flash. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P87C51FA-4B | Same 8 KB OTP, 44-pin PQFP, and PCA features - differs only in programming voltage (12.75 V VPP vs. standard 5 V) | Requires dedicated EPROM programmer with high-voltage programming; not suitable for in-system reprogramming | Select P87C51FA-4B only if legacy programming infrastructure mandates OTP high-voltage write cycles |
| P80C51RA+-4B | 512 bytes RAM (vs. 256), hardware watchdog timer, and 8–32 KB ROM options - same PCA and UART enhancements | Better suited for larger firmware with dynamic data structures or safety-critical systems requiring WDT supervision | Choose P80C51RA+-4B when application demands >256 B RAM or certified watchdog reset behavior |
Compared with P87C51FA-4B and P80C51RA+-4B, the P80C51FA-4B,557 offers optimal balance of OTP security, PCA flexibility, and low-voltage operation for cost-sensitive industrial controllers where 256 B RAM suffices and high-voltage programming is unnecessary.
Availability
P80C51FA-4B,557 is available at Aetrix Electronics and suitable for motor control systems, industrial PLC I/O modules, smart energy meters, and legacy equipment interface adapters requiring stable component supply across extended product lifecycles.
Supply support for P80C51FA-4B,557 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 semiconductor solutions for automotive, industrial, and consumer markets.
The 80C51FA family was designed specifically for cost-effective, low-power embedded control applications requiring enhanced timing peripherals - notably PCA-based PWM and capture - while maintaining full 80C51 software compatibility.
FAQ
What is the maximum operating frequency of the P80C51FA-4B,557?
The P80C51FA-4B,557 supports a maximum clock frequency of 16 MHz, corresponding to a 1 µs instruction cycle in standard 12-clock mode. This rating applies across its specified 2.7 V to 5.5 V supply range and 0 °C to +70 °C ambient temperature. The device does not support the 33 MHz option found in higher-grade variants like the P80C51FA-IB series.
Does the P80C51FA-4B,557 include a hardware watchdog timer?
No, the P80C51FA-4B,557 does not include a hardware watchdog timer. That feature is introduced in the later 80C51RA+ family (e.g., P80C51RA+-4B). The P80C51FA-4B,557 relies on software-based timeout supervision or external watchdog ICs for system reliability assurance.
What package type and pin count does the P80C51FA-4B,557 use?
The P80C51FA-4B,557 uses a 44-pin Plastic Quad Flat Pack (PQFP) package conforming to SOT307-2 mechanical dimensions - 10 mm × 10 mm body size with 0.8 mm lead pitch. This matches the ordering suffix "-4B" in the part number and is distinct from the 40-pin DIP (-4N) or 44-pin PLCC (-4A) variants.
How much on-chip RAM does the P80C51FA-4B,557 provide?
The P80C51FA-4B,557 provides 256 bytes of on-chip RAM, consistent with the base 80C51 architecture. This RAM is directly addressable and supports stack operations, general-purpose variables, and register banking. External RAM expansion up to 64 KB is supported via MOVX instructions and Port 0/Port 2 addressing.
Is the P80C51FA-4B,557 pin-compatible with other 80C51FA variants?
Yes, the P80C51FA-4B,557 is pin-compatible with all other 44-pin PQFP variants in the 80C51FA/8XC51FA family (e.g., P83C51FA-4B, P87C51FA-4B), sharing identical pin functions, electrical characteristics, and package footprint. Differences lie solely in memory type (ROM vs. OTP), security configuration, and programming voltage - not pinout or signal behavior.
P80C51FA-4B,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- 80C
- Packaging:
- Tray
- 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:
- -
- Program Memory Type:
- ROMless
- 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:
P80C51FA-4B,557 FAQ
1.How can I place an order for P80C51FA-4B,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for P80C51FA-4B,557 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 P80C51FA-4B,557 reliable?
The price and inventory of P80C51FA-4B,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P80C51FA-4B,557 is usually 5 days.
3.What payment methods are accepted for P80C51FA-4B,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P80C51FA-4B,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P80C51FA-4B,557?
P80C51FA-4B,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P80C51FA-4B,557 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 P80C51FA-4B,557?
For technical support, including P80C51FA-4B,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P80C51FA-4B,557 requirements.
6.How does Aetrix verify that P80C51FA-4B,557 is sourced from the original manufacturer or authorized distributors?
All P80C51FA-4B,557 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 P80C51FA-4B,557 meets industry standards.
7.What is the process for return or replacement of P80C51FA-4B,557?
All P80C51FA-4B,557 units undergo pre-shipment inspection (PSI). If there is an issue with P80C51FA-4B,557, 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 P80C51FA-4B,557 part is unused and in its original packaging.
Return procedure for P80C51FA-4B,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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