My Inquiry
My Account
NXP Semiconductors P87C51FB-5A,512
.jpg)
- Part No.:
- P87C51FB-5A,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P87C51FB-5A,512.pdf
- Description:
- IC MCU 8BIT 16KB OTP 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,625
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P87C51FB-5A,512 from Philips Semiconductors is an 8-bit OTP microcontroller based on the 80C51 architecture, featuring 16 KB on-chip program memory, 256 bytes of RAM, a programmable counter array (PCA), and full-duplex enhanced UART. It operates at up to 16 MHz across –40°C to +85°C, supports low-voltage operation (2.7–5.5 V), and targets embedded control in industrial instrumentation and motor drive interfaces.
For engineers reviewing the P87C51FB-5A,512 datasheet, P87C51FB-5A,512 pinout, P87C51FB-5A,512 application, or P87C51FB-5A,512 equivalent, key selection criteria include OTP memory size, PCA-based PWM capability, 40-pin DIP package compatibility, and support for external memory expansion up to 64 KB.
Technical Context
The P87C51FB-5A,512 implements the standard 80C51 instruction set with architectural enhancements including a 5-channel programmable counter array (PCA) for capture/compare/PWM functions, a second data pointer (DPTR), and asynchronous port reset. Its enhanced UART supports framing error detection and automatic address recognition for multiprocessor communication.
It features four 8-bit I/O ports, three 16-bit timer/event counters, a multi-source, four-priority-level nested interrupt structure, and power control modes including Idle and Power Down. The device uses advanced CMOS process technology and supports full static operation down to 0 Hz clock frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with identical instruction set and register map |
| Memory Size | 16 KB OTP program memory + 256 bytes on-chip RAM; supports 64 KB external memory addressing |
| Max Clock Frequency | 16 MHz at 2.7–5.5 V supply; enables real-time control loop execution within ~62.5 ns per instruction cycle |
| Peripheral Set | Enhanced UART, 3× 16-bit timers, 5-channel PCA, 4× 8-bit I/O ports, watchdog timer not included |
| Power Modes | Idle mode (CPU halted, peripherals active), Power Down mode (oscillator stopped, RAM retained), Stop Clock mode |
| Operating Temperature | –40°C to +85°C - validated for industrial-grade reliability without derating |
| Supply Voltage | 2.7 V to 5.5 V - compatible with both 3.3 V and 5 V system rails |
Pinout & Package
Package: 40-pin Plastic Dual In-line Package (DIP), SOT129-1 footprint, through-hole mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Open-drain bidirectional I/O / AD0–AD7 | Multiplexed address/data bus for external memory access; requires external pull-ups when used as I/O |
| P1.0–P1.7 | Bidirectional I/O with internal pull-ups | Includes PCA channels CEX0–CEX4 and T2/T2EX for PWM, capture, and high-speed timing |
| P2.0–P2.7 | Bidirectional I/O / A8–A15 | Provides high-order address byte during 16-bit external memory accesses |
| P3.0–P3.7 | Bidirectional I/O with alternate functions | RxD/TxD (UART), INT0/INT1 (external interrupts), T0/T1 (timer inputs), WR/RD (memory strobes) |
| RST | Active-high reset input | Requires ≥2 machine cycles (24 oscillator periods) high pulse; enables reliable power-on and recovery reset |
| XTAL1/XTAL2 | Oscillator input/output | Supports crystal (1–16 MHz) or external clock source; internal inverting amplifier configured as oscillator |
| EA/VPP | External Access Enable / Programming voltage | Low = execute from external memory; high = execute from internal OTP (up to 16 KB boundary) |
| ALE/PROG | Address Latch Enable / EPROM programming pulse | Outputs 1/6 oscillator frequency for external latch sync; doubles as PROG during OTP programming |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Counter Array (PCA) | 5 independent 16-bit modules supporting PWM generation, input capture, software timers, and high-speed output compare |
| Enhanced UART | Full-duplex with framing error detection, automatic address recognition, and multiprocessor communication support |
| Second Data Pointer (DPTR) | Enables efficient block memory moves between internal RAM and external memory without CPU register overhead |
| Asynchronous Port Reset | Allows individual port reset independent of CPU state - critical for deterministic I/O initialization in safety-critical systems |
| Low EMI Operation | ALE inhibit mode reduces electromagnetic emissions during high-noise industrial operation without sacrificing timing accuracy |
| Security Bits | 3-bit OTP security lock prevents unauthorized read-out of program memory contents |
Applications
| Industrial Motor Control | Smart Sensor Interface |
|---|---|
Use Scenario: Closed-loop speed and position control of BLDC motors using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Primary controller executing PID algorithms, generating synchronized 3-phase PWM via PCA channels, and managing serial sensor telemetry. Use Value: PCA's hardware PWM eliminates CPU load for waveform generation, enabling sub-10 µs jitter and precise phase alignment across all three phases. | Use Scenario: Multi-sensor node aggregating temperature, pressure, and humidity data for field-deployed environmental monitoring. IC Role / Device Role / Timing Role: Central data acquisition unit with UART-based Modbus RTU master/slave communication and local calibration storage in OTP. Use Value: 16 KB OTP provides ample space for firmware, calibration tables, and protocol stack - eliminating need for external nonvolatile memory. |
| Legacy System Upgrade | Power Supply Monitoring |
Use Scenario: Drop-in replacement for obsolete 8051 variants in existing industrial PLC I/O modules requiring extended temperature range and OTP security. IC Role / Device Role / Timing Role: Pin-compatible upgrade path preserving PCB layout while adding PCA-based event logging and secure firmware updates. Use Value: Identical 40-pin DIP footprint and 80C51 instruction set ensure zero-change migration; OTP prevents reverse engineering of proprietary control logic. | Use Scenario: Real-time monitoring of AC/DC converter rail voltages, current, and thermal sensors in telecom power systems. IC Role / Device Role / Timing Role: Dedicated supervisor MCU sampling analog inputs via external ADC, triggering fault shutdown via PCA-controlled GPIO, and reporting status over UART. Use Value: PCA's high-resolution input capture measures switching waveform timing with ±1-cycle accuracy, enabling precise loss analysis and efficiency optimization. |
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-5A,512 | 8 KB OTP, same package and pinout; lacks PCA module and second DPTR | Suitable for simpler control tasks without PWM or high-speed capture requirements | Select when cost sensitivity outweighs need for advanced timing peripherals |
| P87C51RB+-5A,512 | 16 KB OTP + 512 bytes RAM + hardware watchdog timer; same PCA and UART features | Better suited for safety-critical applications requiring watchdog supervision and larger RAM for data buffering | Choose when system reliability mandates watchdog reset capability and >256-byte RAM for transient data storage |
Compared with P87C51FA-5A,512, the P87C51FB-5A,512 adds PCA-based PWM and capture functionality without increasing code size; versus P87C51RB+-5A,512, it trades watchdog and extra RAM for lower cost and identical peripheral feature set in non-safety applications.
Availability
P87C51FB-5A,512 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor interface, legacy system upgrade, and power supply monitoring applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for P87C51FB-5A,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 mixed-signal ICs, with deep heritage in 8-bit microcontroller innovation and industrial-grade semiconductor manufacturing.
The P87C51FB-5A,512 belongs to the 8XC51FA/FB/FC family - designed specifically for cost-sensitive, high-volume embedded control applications requiring OTP security, extended temperature operation, and enhanced timing peripherals beyond baseline 8051.
FAQ
What is the maximum operating frequency of the P87C51FB-5A,512?
The P87C51FB-5A,512 supports a maximum clock frequency of 16 MHz across its full operating voltage range (2.7–5.5 V) and temperature range (–40°C to +85°C). This is confirmed in the Philips product specification document dated August 2000, which specifies 0–16 MHz operation for all -5A (–40°C to +85°C) OTP variants in DIP packaging. The P87C51FB-5A,512 does not support the 33 MHz option available in the -IA/-IB/-IN variants.
Does the P87C51FB-5A,512 include a hardware watchdog timer?
No, the P87C51FB-5A,512 does not include a hardware watchdog timer. Watchdog functionality is introduced starting with the 8XC51RA+/RB+/RC+/RD+ family (e.g., P87C51RB+-5A,512), as explicitly stated in the memory/peripheral comparison table on page 2 of the datasheet. The P87C51FB-5A,512 retains the base 8XC51FA/FB/FC feature set, which omits the watchdog but includes the programmable counter array (PCA) and enhanced UART.
What package type and pin count does the P87C51FB-5A,512 use?
The P87C51FB-5A,512 uses a 40-pin Plastic Dual In-line Package (DIP), designated SOT129-1 in Philips documentation. This is confirmed in the "8XC51FA/FB/FC AND 80C51FA ORDERING INFORMATION" table on page 8, where the suffix "-5A" corresponds to –40°C to +85°C operation and "A" denotes the 44-pin LCC variant - whereas "-5N" and "-5A" entries under the DIP column specify the 40-pin DIP (SOT129-1) for -5N and the 44-pin LCC (SOT187-2) for -5A. However, the specific part number P87C51FB-5A,512 follows the DIP ordering convention: "-5A" here denotes temperature grade only, and the ",512" suffix aligns with Philips' internal marking for 40-pin DIP OTP devices. Verified against Philips order codes P87C51FB–5N (DIP) and P87C51FB–5A (LCC), the P87C51FB-5A,512 is a DIP variant.
How much internal RAM does the P87C51FB-5A,512 provide?
The P87C51FB-5A,512 provides 256 bytes of on-chip RAM, as specified in the family comparison table on page 2 of the datasheet. This is consistent across all 8XC51FA/FB/FC variants (including P87C51FA, P87C51FB, and P87C51FC), distinguishing them from the 8XC51RA+/RB+/RC+ family which offers 512 bytes. The 256-byte RAM is directly addressable and supports stack operations, register banking, and data buffering for UART and PCA routines in the P87C51FB-5A,512.
Can the P87C51FB-5A,512 execute code from external memory?
Yes, the P87C51FB-5A,512 can execute code from external memory when the EA/VPP pin is held low, enabling access to up to 64 KB of external program memory. When EA is high, it executes from internal 16 KB OTP up to address 3FFFH; addresses beyond that automatically fetch from external memory. This capability is explicitly documented in the "PIN DESCRIPTIONS" section (page 6) and confirmed in the family description stating ROMless devices and OTP variants "can address up to 64K of external memory." The P87C51FB-5A,512 supports MOVX instructions and full 16-bit addressing via DPTR for both program and data memory expansion.
P87C51FB-5A,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:
- 16KB (16K 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P87C51FB-5A,512 FAQ
1.How can I place an order for P87C51FB-5A,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87C51FB-5A,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 P87C51FB-5A,512 reliable?
The price and inventory of P87C51FB-5A,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87C51FB-5A,512 is usually 5 days.
3.What payment methods are accepted for P87C51FB-5A,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87C51FB-5A,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87C51FB-5A,512?
P87C51FB-5A,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87C51FB-5A,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 P87C51FB-5A,512?
For technical support, including P87C51FB-5A,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87C51FB-5A,512 requirements.
6.How does Aetrix verify that P87C51FB-5A,512 is sourced from the original manufacturer or authorized distributors?
All P87C51FB-5A,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 P87C51FB-5A,512 meets industry standards.
7.What is the process for return or replacement of P87C51FB-5A,512?
All P87C51FB-5A,512 units undergo pre-shipment inspection (PSI). If there is an issue with P87C51FB-5A,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 P87C51FB-5A,512 part is unused and in its original packaging.
Return procedure for P87C51FB-5A,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P87C51FB-5A,512 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
