My Inquiry
My Account
NXP Semiconductors P87C52SFAA,512
.jpg)
- Part No.:
- P87C52SFAA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P87C52SFAA,512.pdf
- Description:
- IC MCU 8BIT 8KB OTP 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,942
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P87C52SFAA,512 from Philips Semiconductors is an 8-bit OTP-based microcontroller in the 80C51 architecture family, featuring 8 KB on-chip OTP ROM, 256 B RAM, three 16-bit timers/counters, full-duplex UART, and four 8-bit I/O ports. It operates from 2.7 V to 5.5 V at up to 33 MHz and supports idle and power-down modes for low-power embedded control in industrial instrumentation and legacy automation systems.
For engineers reviewing the P87C52SFAA,512 datasheet, P87C52SFAA,512 pinout, P87C52SFAA,512 application, or P87C52SFAA,512 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use scenarios, and validated alternative options - all grounded in the official Philips 2000 product specification.
Technical Context
The P87C52SFAA,512 implements a static CMOS 8051 CPU core with dual data pointers, Boolean processor, and full static operation enabling zero-frequency clock stoppage. Its memory subsystem supports 64 KB external program and data address spaces, with internal 8 KB OTP ROM and 256 × 8 RAM.
It integrates a six-source, four-priority nested interrupt controller, programmable clock-out on P1.0 (61 Hz–4 MHz), and Timer 2 operating in capture, auto-reload (up/down), or baud-rate generator modes. Power management includes software-selectable idle mode (CPU halted, peripherals active) and power-down mode (oscillator stopped, RAM retained down to 2.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8051-compatible 8-bit CPU with Boolean processor and dual DPTR registers |
| Memory: OTP ROM | 8 K × 8 bits - non-volatile program storage; requires 12.75 V VPP for programming |
| Memory: RAM | 256 × 8 bytes - on-chip volatile data space; retains contents in power-down mode down to 2.0 V |
| Max Operating Frequency | 33 MHz at 5 V - enables high-throughput serial communication and timer resolution |
| Supply Voltage Range | 2.7 V to 5.5 V - supports battery-backed and wide-input industrial power rails |
| Operating Temperature | –40 °C to +85 °C - qualified for extended-temperature industrial environments |
| I/O Ports | Four 8-bit bidirectional ports (P0–P3) with Schmitt-trigger inputs and internal pull-ups on P1/P2/P3 |
Pinout & Package
Package: Plastic Leaded Chip Carrier (PLCC), 44-pin, SOT187-2 footprint. Pin 1 is index corner; pins 1, 12, 23, 34 are No Internal Connection (NIC). VCC (pin 44) and VSS (pin 22) are dedicated power terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 (pins 36–43) | Open-drain multiplexed AD bus | Low-order address/data bus during external memory access; requires external pull-ups for reliable 1-level output |
| P1.0/T2 (pin 2) | Timer 2 clock input / clock-out | Configurable as external count input or 50% duty-cycle clock output (61 Hz–4 MHz); no internal pull-up |
| P1.1/T2EX (pin 3) | Timer 2 external control | Triggers capture/reload events or controls up/down counting direction in DCEN mode |
| P2.0–P2.7 (pins 24–31) | High-order address bus / I/O | Emits A8–A15 during 16-bit external memory accesses; retains port function during 8-bit MOVX @Ri |
| P3.0/RxD (pin 11) | Serial input | Asynchronous UART receive input with framing error detection and automatic address recognition |
| P3.1/TxD (pin 13) | Serial output | Full-duplex UART transmit output; supports modes 0–3 with variable baud rates via Timer 1 or Timer 2 |
| RST (pin 10) | Reset input | Active-high reset requiring ≥2 machine cycles (24 oscillator periods); internal diffused resistor enables RC power-on reset |
| XTAL1 (pin 21), XTAL2 (pin 20) | Oscillator interface | Crystal or external clock input/output pair; supports 0–33 MHz operation; XTAL1 driven externally when using external clock source |
Key Features
| Feature | Design Value |
|---|---|
| Full-static CMOS design | Enables zero-frequency operation and deterministic wake-up from idle/power-down without data loss |
| Programmable clock-out on P1.0 | Generates precise 50% duty-cycle clocks (61 Hz–4 MHz at 16 MHz crystal) without consuming CPU cycles |
| Timer 2 with three modes | Supports capture, auto-reload (up/down), and independent baud-rate generation - freeing Timer 1 for other tasks |
| Security bit protection | Three OTP-programmable security bits prevent unauthorized readout of on-chip code memory |
| Low EMI operation | ALE inhibit and slew-rate-controlled outputs reduce radiated emissions in noise-sensitive industrial layouts |
Applications
| Industrial PLC I/O Module | Legacy Serial Protocol Converter |
|---|---|
|
Use Scenario: Standalone DIN-rail-mounted module converting Modbus RTU over RS-485 to discrete relay/digital input signals. IC Role / Device Role / Timing Role: Primary controller executing protocol stack, managing GPIO timing, and driving UART with hardware framing error detection. Use Value: 256 B RAM suffices for protocol buffer handling; 8 KB OTP stores hardened firmware; 33 MHz clock ensures sub-millisecond response to fieldbus polling. |
Use Scenario: Field-deployed bridge translating proprietary ASCII-based sensor commands to ASCII/RTU over RS-232/RS-485. IC Role / Device Role / Timing Role: UART-centric controller with Timer 2 configured as independent baud-rate generator for simultaneous dual-port operation. Use Value: Full-duplex UART with automatic address recognition eliminates software overhead; OTP prevents firmware tampering in unattended deployments. |
| Embedded Power Meter Firmware Core | Automated Test Equipment (ATE) Sequencer |
|
Use Scenario: Metering unit performing RMS voltage/current calculation and logging energy data to EEPROM via I²C or SPI. IC Role / Device Role / Timing Role: Real-time data acquisition controller interfacing ADCs via GPIO/timers and managing non-volatile storage writes. Use Value: Three 16-bit timers enable precise sampling synchronization; 2.7–5.5 V supply range accommodates battery backup and line-powered operation. |
Use Scenario: Rack-mounted test sequencer coordinating relay actuation, DMM triggering, and pass/fail LED signaling under PC host control. IC Role / Device Role / Timing Role: Deterministic state-machine executor using idle mode between test steps to minimize thermal drift and power dissipation. Use Value: Static design allows clock stoppage between measurements; 4-level priority interrupts ensure timely response to safety-critical fault signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C52-24PU | 8 KB Flash (reprogrammable), 256 B RAM, 24 MHz max, same PLCC-44 package | Lacks Timer 2 and programmable clock-out; no power-down wake-up via INT0/INT1 | Choose for prototyping or firmware updates; avoid where hardware-assisted serial timing or ultra-low-power sleep is required. |
| DS89C450-QCL | 8051-compatible, 16 KB Flash, 1 KB RAM, 33 MHz, enhanced UART with FIFO, QFP-44 | Different pinout; higher current draw; no OTP security bits; supports Dallas High-Speed 8051 instruction set | Choose for higher throughput or larger code size; verify PCB layout compatibility due to QFP vs PLCC footprint mismatch. |
Compared with AT89C52-24PU and DS89C450-QCL, the P87C52SFAA,512 offers OTP-based firmware immutability, Timer 2–driven baud-rate independence, and proven industrial temperature reliability - making it optimal for cost-sensitive, field-deployed, maintenance-free control nodes.
Availability
P87C52SFAA,512 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy serial protocol converters, embedded power meters, automated test equipment sequencers, and battery-backed instrumentation requiring stable component supply across long production lifecycles.
Supply support for P87C52SFAA,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 pioneer in industrial-grade mixed-signal ICs, known for robustness, longevity, and broad automotive/industrial qualification.
The P87C52SFAA,512 belongs to the 80C51/87C52 OTP microcontroller family designed for cost-effective, high-reliability embedded control in environments where firmware integrity and extended temperature operation are critical.
FAQ
What is the maximum clock frequency supported by the P87C52SFAA,512?
The P87C52SFAA,512 supports a maximum operating frequency of 33 MHz when powered at 5 V. At lower supply voltages (2.7–5.5 V), the maximum rated frequency is 16 MHz. This dual-speed capability allows system designers to optimize performance versus power consumption based on rail constraints - the P87C52SFAA,512 maintains full functionality and timing compliance across both ranges per the Philips 2000 specification.
Does the P87C52SFAA,512 include on-chip EEPROM or Flash memory?
No, the P87C52SFAA,512 contains 8 KB of one-time-programmable (OTP) ROM, not EEPROM or Flash. OTP memory is programmed once using 12.75 V VPP applied to the EA/VPP pin and cannot be electrically erased or rewritten. This provides firmware security and immunity to accidental overwrite but requires final firmware validation before programming - the P87C52SFAA,512 does not support in-system reprogramming.
How does the P87C52SFAA,512 handle power-down mode wake-up?
The P87C52SFAA,512 supports wake-up from power-down mode via hardware reset or external interrupt on INT0 or INT1, provided WUPD (AUXR1.3) is enabled. Upon wake-up, the oscillator restarts and stabilizes (typically <10 ms), after which execution resumes from the instruction following the one that initiated power-down. The on-chip RAM and SFRs retain their values, ensuring state continuity - a key behavior confirmed in the Philips specification for the P87C52SFAA,512.
Is the P87C52SFAA,512 pin-compatible with the P80C52 family?
Yes, the P87C52SFAA,512 shares identical pinout, electrical characteristics, and functional mapping with the P80C52SFAA variant in the same PLCC-44 package (SOT187-2). Both devices implement the same 8051 core, peripheral set, and memory architecture - the only difference is ROM type (OTP vs mask ROM). This allows direct substitution in existing P80C52 designs where field-programmable firmware is required, without PCB or firmware changes.
What UART features does the P87C52SFAA,512 support?
The P87C52SFAA,512 includes a full-duplex UART with framing error detection, automatic address recognition (for multi-processor mode), and selectable baud rates generated by Timer 1 or Timer 2. Its serial port supports all standard 8051 modes (0–3), including shift register (mode 0), 8-bit UART (mode 1), 9-bit UART with fixed baud rate (mode 2), and 9-bit UART with variable baud rate (mode 3) - all fully implemented and verified in the P87C52SFAA,512 silicon.
P87C52SFAA,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 87C
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- EBI/EMI, UART/USART
- Peripherals:
- POR
- Number of I/O:
- 32
- Program Memory Size:
- 8KB (8K 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:
P87C52SFAA,512 FAQ
1.How can I place an order for P87C52SFAA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87C52SFAA,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 P87C52SFAA,512 reliable?
The price and inventory of P87C52SFAA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87C52SFAA,512 is usually 5 days.
3.What payment methods are accepted for P87C52SFAA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87C52SFAA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87C52SFAA,512?
P87C52SFAA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87C52SFAA,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 P87C52SFAA,512?
For technical support, including P87C52SFAA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87C52SFAA,512 requirements.
6.How does Aetrix verify that P87C52SFAA,512 is sourced from the original manufacturer or authorized distributors?
All P87C52SFAA,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 P87C52SFAA,512 meets industry standards.
7.What is the process for return or replacement of P87C52SFAA,512?
All P87C52SFAA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P87C52SFAA,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 P87C52SFAA,512 part is unused and in its original packaging.
Return procedure for P87C52SFAA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P87C52SFAA,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…
