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NXP Semiconductors P87C54SBPN,112
- Part No.:
- P87C54SBPN,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
P87C54SBPN,112.pdf
- Description:
- IC MCU 8BIT 16KB OTP 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,470
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Product details
Overview
P87C54SBPN,112 from NXP Semiconductors (formerly Philips) is an 8-bit OTP microcontroller based on the 80C51 architecture, featuring 16 KB on-chip OTP program memory, 256 bytes of RAM, four 8-bit I/O ports, three 16-bit timers, and a full-duplex enhanced UART with framing error detection and automatic address recognition - used in industrial control panels requiring deterministic real-time response and field-upgradable firmware.
For engineers reviewing the P87C54SBPN,112 datasheet, P87C54SBPN,112 pinout, P87C54SBPN,112 application, or P87C54SBPN,112 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for legacy 8051-based system maintenance and redesign.
Technical Context
The P87C54SBPN,112 implements the standard 80C51 instruction set with full static operation and supports up to 16 MHz external crystal frequency. It operates across 2.7 V–5.5 V supply range and includes programmable clock-out, second DPTR register, and asynchronous port reset functionality.
Its enhanced UART enables multiprocessor communications via automatic address recognition, while the four-priority-level nested interrupt structure supports up to seven interrupt sources including INT0/INT1, T0/T1, serial receive/transmit, and timer 2 overflow - critical for time-sensitive sensor polling and actuator control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with identical instruction set and timing model |
| Program Memory | 16 KB OTP - non-volatile, one-time programmable code storage with security bits |
| RAM Size | 256 bytes internal RAM - sufficient for stack, variables, and small buffers without external expansion |
| Max Clock Frequency | 16 MHz - supports real-time control at ≤62.5 ns instruction cycle (12-clock mode) |
| I/O Ports | Four 8-bit bidirectional ports (P0–P3) with internal pull-ups on P1/P2/P3; P0 serves as AD0–AD7 multiplexed bus |
| Timers/Counters | Three 16-bit timers (T0, T1, T2) - T2 supports capture/compare and baud rate generation |
| Serial Interface | Full-duplex enhanced UART - supports framing error detection and multiprocessor communication mode |
Pinout & Package
Package: 40-pin Plastic Dual In-line Package (PDIP), SOT129-1, lead-free compatible, operating temperature range 0°C to +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 (AD0–AD7) | Multiplexed Address/Data Bus | Low-order address/data lines during external memory access; open-drain outputs require external pull-ups |
| P1.0–P1.7 | General-Purpose I/O Port | Internal pull-ups enable direct switch/sensor interfacing; P1.0/P1.1 support Timer 2 functions (T2/T2EX) |
| P2.0–P2.7 (A8–A15) | High-Order Address Bus | Provides upper address byte for 64 KB external memory addressing; also functions as general I/O |
| P3.0–P3.7 | Secondary Function Port | RxD/TxD (serial), INT0/INT1 (external interrupts), T0/T1 (timer inputs), WR/RD (memory strobes) |
| RST | Reset Input | Active-high reset requiring ≥2 machine cycles (24 oscillator periods); internal pull-down enables power-on reset with RC network |
| XTAL1/XTAL2 | Oscillator Inputs | Connects to external crystal or ceramic resonator; XTAL1 accepts external clock source if XTAL2 left unconnected |
| EA/VPP | External Access Enable | High = execute from internal OTP; low = fetch code from external memory starting at 0000H |
| ALE/PROG | Address Latch Enable | Outputs pulse at 1/6 oscillator frequency to latch P0 address bits; doubles as programming pulse during OTP write |
Key Features
| Feature | Design Value |
|---|---|
| Full Static Operation | Enables clock stop/start without data loss - essential for battery-backed systems and low-power sleep modes |
| Enhanced UART | Supports multiprocessor communication with automatic address recognition and framing error detection |
| Four Priority-Level Interrupts | Allows nested servicing of critical events (e.g., motor fault interrupt preempting sensor read) |
| Programmable Clock-Out | Generates precise system clock signal for synchronizing external logic or ADC sampling |
| Second DPTR Register | Enables efficient dual-pointer operations for string handling and table lookups without software overhead |
| Security Bits (3-bit OTP) | Prevents unauthorized firmware extraction by disabling external program memory access after programming |
Applications
| Industrial Motor Control | Legacy PLC I/O Module |
|---|---|
Use Scenario: Closed-loop speed regulation of 3-phase AC induction motors using zero-crossing detection and PWM output. IC Role / Device Role / Timing Role: Central controller executing PID algorithm, managing 16-bit timer-based PWM generation, and handling RS-485 Modbus RTU communication. Use Value: Deterministic 16 MHz execution ensures sub-100 µs loop timing; OTP memory secures proprietary motor tuning parameters against field tampering. |
Use Scenario: Digital input/output expansion module for DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local intelligence node polling 16-channel opto-isolated inputs and driving solid-state relay outputs with configurable debounce and scan timing. Use Value: Four 8-bit I/O ports plus external memory interface allow scalable channel count; enhanced UART enables reliable Modbus slave operation over noisy factory wiring. |
| Smart Energy Metering | Embedded HVAC Controller |
Use Scenario: Residential electricity meter with pulse counting, tariff switching, and LCD display management. IC Role / Device Role / Timing Role: Main MCU coordinating metrology IC SPI reads, EEPROM data logging, and real-time clock synchronization via T2 capture mode. Use Value: 256-byte RAM accommodates rolling 30-day consumption buffers; OTP prevents unauthorized firmware modification affecting billing accuracy. |
Use Scenario: Wall-mounted thermostat with temperature/humidity sensing, fan speed control, and wireless sub-GHz RF link. IC Role / Device Role / Timing Role: System orchestrator managing sensor ADC reads, 16-bit timer-driven fan PWM, and UART-based RF module command protocol. Use Value: Low-voltage operation (2.7 V–5.5 V) supports coin-cell backup during mains failure; idle mode reduces average current to <50 µA for battery longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P87C54UBPN | Same 16 KB OTP, but rated for 0–70°C and 5 V only, with 33 MHz max clock (vs. 16 MHz for P87C54SBPN,112) | Higher-speed operation suitable for faster serial throughput or tighter control loops | Select when system requires >16 MHz timing margin or operates exclusively at 5 V nominal |
| P89C51RA2BN,112 | Flash-based 80C51 derivative with 8 KB flash, 512 bytes RAM, hardware watchdog, and ISP capability - no OTP programming required | Enables in-field firmware updates and eliminates need for EPROM programmer; higher RAM supports larger protocol stacks | Choose for new designs requiring reprogrammability, longer lifecycle support, or reduced BOM cost versus OTP infrastructure |
Compared with P87C54SBPN,112, P87C54UBPN offers higher clock headroom at fixed 5 V, while P89C51RA2BN,112 replaces OTP with field-upgradable flash and adds watchdog and ISP - making it preferable for production scalability and long-term maintainability, though requiring PCB layout changes due to different pinout and voltage tolerance.
Availability
P87C54SBPN,112 is available at Aetrix Electronics and suitable for industrial motor control, legacy PLC I/O modules, smart energy metering, and embedded HVAC controllers requiring stable component supply and long-term obsolescence management.
Supply support for P87C54SBPN,112 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering microcontroller development.
The P87C54SBPN,112 belongs to NXP's legacy 80C51 family - designed specifically for cost-sensitive, high-reliability industrial control systems where OTP security, wide voltage operation, and proven 8051 compatibility are mandatory design requirements.
FAQ
What is the maximum operating frequency of the P87C54SBPN,112?
The P87C54SBPN,112 is rated for a maximum external crystal frequency of 16 MHz under its specified 2.7 V–5.5 V supply range. At this frequency, it achieves a 12-clock-per-instruction cycle time of 750 ns, enabling deterministic real-time response for industrial timing-critical tasks. The device does not support frequencies above 16 MHz in its SBPN variant.
Does the P87C54SBPN,112 include a hardware watchdog timer?
No, the P87C54SBPN,112 does not include a hardware watchdog timer. Watchdog functionality is introduced in later derivatives such as the 8XC51RA+/RD+ families. For systems requiring watchdog protection, external supervisory ICs or software-based timeout monitoring using Timer 2 must be implemented alongside the P87C54SBPN,112.
What package type and pin count does the P87C54SBPN,112 use?
The P87C54SBPN,112 uses a 40-pin Plastic Dual In-line Package (PDIP), designated SOT129-1 in NXP documentation. It features standard 0.6-inch row spacing and through-hole mounting, making it suitable for prototyping, repair, and legacy board replacements where socket compatibility is required.
Can the P87C54SBPN,112 execute code from external memory?
Yes, the P87C54SBPN,112 can execute code from external memory when the EA/VPP pin is held low. In this configuration, it fetches instructions from external program memory starting at address 0000H, while still utilizing its internal 256-byte RAM. This mode supports up to 64 KB of external code space using standard TTL-compatible memory devices.
Is the P87C54SBPN,112 RoHS compliant?
Yes, the P87C54SBPN,112 is manufactured as a lead-free device compliant with EU RoHS Directive 2011/65/EU. Its PDIP package uses matte tin plating and meets JEDEC J-STD-609A Class 1 moisture sensitivity level, supporting standard reflow and wave soldering processes without exemption requirements.
P87C54SBPN,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- 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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
P87C54SBPN,112 FAQ
1.How can I place an order for P87C54SBPN,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87C54SBPN,112 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 P87C54SBPN,112 reliable?
The price and inventory of P87C54SBPN,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87C54SBPN,112 is usually 5 days.
3.What payment methods are accepted for P87C54SBPN,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87C54SBPN,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87C54SBPN,112?
P87C54SBPN,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87C54SBPN,112 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 P87C54SBPN,112?
For technical support, including P87C54SBPN,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87C54SBPN,112 requirements.
6.How does Aetrix verify that P87C54SBPN,112 is sourced from the original manufacturer or authorized distributors?
All P87C54SBPN,112 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 P87C54SBPN,112 meets industry standards.
7.What is the process for return or replacement of P87C54SBPN,112?
All P87C54SBPN,112 units undergo pre-shipment inspection (PSI). If there is an issue with P87C54SBPN,112, 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 P87C54SBPN,112 part is unused and in its original packaging.
Return procedure for P87C54SBPN,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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