My Inquiry
My Account
NXP Semiconductors P87C54X2BN,112
- Part No.:
- P87C54X2BN,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
P87C54X2BN,112.pdf
- Description:
- IC MCU 8BIT 16KB OTP 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,605
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P87C54X2BN,112 from Philips Semiconductors is a 16 KB OTP-based 8-bit microcontroller in the 80C51 family, operating at 2.7–5.5 V with 6-/12-clock modes (up to 33 MHz), 256 B RAM, three 16-bit timers, full-duplex UART, and four 8-bit I/O ports. It targets industrial control, embedded instrumentation, and legacy system upgrades requiring ROMless flexibility with on-chip nonvolatile program storage.
For engineers reviewing the P87C54X2BN,112 datasheet, P87C54X2BN,112 pinout, P87C54X2BN,112 application, or P87C54X2BN,112 equivalent, key selection criteria include OTP memory size, DIP-40 package compatibility, low-voltage operation down to 2.7 V, idle/power-down power management, and 80C51 instruction set compatibility for legacy code migration.
Technical Context
This device implements a static CMOS 80C51 core with dual clock modes-software-selectable 6-clock (2× speed) or default 12-clock operation-enabling deterministic timing control across voltage ranges. The architecture supports external memory expansion via multiplexed Port 0 (AD0–AD7) and Port 2 (A8–A15), with ALE/PROG providing address latching synchronization.
Power management includes hardware-supported Idle mode (CPU halted, peripherals active) and Power-down mode (oscillator stopped, RAM retained down to 2.0 V), both exitable via external interrupt or reset. Timer 2 provides capture/compare, baud-rate generation, and programmable clock-out (P1.0) with configurable reload values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with Boolean processor and static design enabling zero-frequency operation |
| Memory | 16 KB on-chip OTP program memory; 256 B internal RAM; supports up to 64 KB external program/data memory |
| Clock Modes | Software-selectable 6-clock (max 30 MHz @ 5 V) or 12-clock (max 33 MHz @ 5 V); also operates at 16 MHz down to 2.7 V |
| I/O & Peripherals | Four 8-bit bidirectional ports (32 pins total); three 16-bit timers/counters; full-duplex UART with framing error detection and address recognition |
| Power Management | Idle mode halts CPU while preserving RAM/timers/UART/interrupts; Power-down mode stops oscillator and reduces current to µA range |
| Package & Temp | DIP-40 (SOT129-1), 0 °C to +70 °C operating range; lead-free compliant per manufacturer documentation |
Pinout & Package
Package: Plastic Dual In-Line Package (DIP), 40 leads, 600 mil width, SOT129-1 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 (39–32) | Multiplexed Address/Data Bus | Open-drain I/O; outputs AD0–AD7 during external memory access; requires external pull-ups for bus driving |
| P1.0–P1.7 (1–8) | General-Purpose I/O | Bidirectional with internal pull-ups; P1.0/T2 and P1.1/T2EX support Timer 2 capture/compare and clock-out functions |
| P2.0–P2.7 (21–28) | High-Order Address Bus | Outputs A8–A15 during 16-bit external memory accesses; retains port function during 8-bit MOVX @Ri operations |
| P3.0–P3.7 (10–17) | Secondary Function Port | Provides RxD/TxD, INT0/INT1, T0/T1, WR/RD strobes; enables serial comms, interrupts, and external memory control |
| RST (9) | Reset Input | Active-high asynchronous reset requiring ≥2 machine cycles; internal pull-down enables power-on reset with single capacitor |
| XTAL1 (8), XTAL2 (7) | Oscillator Interface | Connects to crystal/resonator; XTAL1 accepts external clock input when XTAL2 is left unconnected |
| EA/VPP (20) | External Access Enable | High = execute from internal OTP; low = fetch from external program memory below 0FFFH/1FFFH/3FFFH/7FFFH |
| ALE/PROG (30) | Address Latch Enable | Outputs 1/6 (12-clock) or 1/3 (6-clock) oscillator frequency; serves as programming pulse during OTP write |
Key Features
| Feature | Design Value |
|---|---|
| OTP Memory Security | Three programmable security bits prevent unauthorized readout of 16 KB OTP contents after programming |
| Programmable Clock-Out | 50% duty cycle output on P1.0 ranging from 61 Hz to 4 MHz (12-clock) or 122 Hz to 8 MHz (6-clock) using Timer 2 reload registers |
| Low-EMI Operation | Configurable ALE inhibit, slew-rate-controlled outputs, and 6-clock mode reduce radiated emissions for industrial compliance |
| ONCE Emulation Mode | Enables in-circuit debugging without removing IC: assert ALE low during reset to float Port 0 and activate emulator interface |
| Dual Data Pointers | Separate DPTR and auxiliary data pointer enable efficient block memory moves between internal/external RAM and code space |
Applications
| Industrial PLC I/O Module | Legacy Medical Device Controller |
|---|---|
Use Scenario: Standalone I/O expansion node in distributed automation systems with RS-485 communication and analog sensor interfacing. IC Role / Device Role / Timing Role: Primary controller executing ladder logic interpreter; manages real-time timer-triggered I/O sampling and UART-based Modbus RTU protocol stack. Use Value: 256 B RAM and 16 KB OTP accommodate compact firmware with interrupt-driven I/O handlers; low-power idle mode extends uptime in battery-backed modules. | Use Scenario: Embedded controller in electrocardiogram (ECG) signal acquisition units requiring deterministic ADC triggering and serial telemetry. IC Role / Device Role / Timing Role: Timing-critical peripheral manager coordinating 12-bit ADC sampling, UART transmission, and LED/status display updates. Use Value: Three independent 16-bit timers enable precise 1 kHz sampling interval, UART baud rate generation, and LED blink timing simultaneously without software overhead. |
| Smart Energy Meter Firmware Core | Automotive Body Control Module |
Use Scenario: Firmware execution engine in Class 0.5S electricity meters with metrology IC interface and IR/RF communication layers. IC Role / Device Role / Timing Role: Host processor managing SPI-based metrology data reads, EEPROM logging, and secure firmware updates over optical port. Use Value: 2.7–5.5 V operation ensures robustness across wide supply rails; OTP memory guarantees field-programmable calibration constants remain tamper-proof. | Use Scenario: Central body controller in entry-level vehicles handling door lock actuation, window lift sequencing, and interior lighting PWM. IC Role / Device Role / Timing Role: Real-time state machine orchestrating multi-step motor control sequences with fault monitoring and CAN message relay. Use Value: Four 8-bit I/O ports directly drive relays and optocouplers; Timer 2 capture mode detects edge-triggered switch inputs for anti-glitch debounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P87C54X2FA,112 | Same 16 KB OTP, 256 B RAM, and DIP-40 pinout but rated for –40 °C to +85 °C industrial temperature range | Required for under-hood automotive or outdoor metering where extended thermal stability is mandatory | Select when ambient operating temperature exceeds +70 °C or requires AEC-Q100 alignment |
| P89C51RX2BN,112 | Enhanced 80C51 derivative with 64 KB Flash, ISP capability, and additional peripherals (PCA, enhanced UART), but larger footprint (PLCC44/LQFP44) | Supports field firmware updates and complex protocols like LIN or bootloader-based diagnostics | Choose when future-proofing, in-system reprogramming, or expanded peripheral integration is required |
Compared with P87C54X2FA,112, the P87C54X2BN,112 offers identical functionality at lower cost and qualification level for commercial-grade applications; versus P89C51RX2BN,112, it trades Flash flexibility and modern features for proven OTP reliability and DIP-40 drop-in compatibility in legacy PCBs.
Availability
P87C54X2BN,112 is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and smart metering applications requiring stable component supply, long-term lifecycle support, and direct replacement of legacy 80C51-based designs.
Supply support for P87C54X2BN,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
Philips Semiconductors (now NXP Semiconductors) is a global semiconductor innovator founded in the Netherlands, specializing in high-reliability mixed-signal ICs for industrial, automotive, and consumer markets.
The P87C5xX2 product line was designed specifically to extend the 80C51 architecture with OTP memory, low-voltage operation, and enhanced power management-targeting cost-sensitive embedded systems needing field-programmable firmware without external EPROM sockets.
FAQ
What is the maximum operating frequency of the P87C54X2BN,112?
The P87C54X2BN,112 supports up to 33 MHz in 12-clock mode at 5 V ±10%, and up to 30 MHz in 6-clock mode at the same supply. At reduced voltages (2.7–5.5 V), the maximum frequency is 16 MHz in both clock modes. These limits are defined by the oscillator characteristics and internal timing margins specified in the 2003 Philips product data sheet.
Does the P87C54X2BN,112 include on-chip RAM, and how much is available?
Yes, the P87C54X2BN,112 includes 256 bytes of on-chip RAM. This RAM is fully accessible during normal operation, Idle mode, and Power-down mode (retained down to 2.0 V). It is used for stack operations, register banking, and general-purpose data storage, consistent with standard 80C51 architecture behavior.
Can the P87C54X2BN,112 execute code from external memory?
Yes, the P87C54X2BN,112 can execute code from external program memory when the EA/VPP pin (Pin 20) is held low. In this configuration, the device fetches instructions from external ROM/EPROM starting at address 0000H, while still using its 16 KB on-chip OTP for data or partial code overlay. External access requires proper ALE and PSEN timing per the 80C51 bus protocol.
What power-saving modes does the P87C54X2BN,112 support?
The P87C54X2BN,112 supports two hardware-controlled low-power modes: Idle mode (CPU halted, peripherals active, RAM preserved) and Power-down mode (oscillator stopped, RAM retained down to 2.0 V). Both modes are entered via software instruction and exited by interrupt or reset. Wake-up from Power-down requires WUPD bit (AUXR1.3) enabled and level-sensitive INT0/INT1 configuration.
Is the P87C54X2BN,112 pin-compatible with other members of the P87C5xX2 family?
Yes, the P87C54X2BN,112 shares identical DIP-40 pinout and electrical characteristics with other P87C5xX2 variants in the same package (e.g., P87C52X2BN,112 and P87C58X2BN,112), differing only in on-chip OTP size (8 KB vs. 16 KB vs. 32 KB) and associated memory mapping. This enables direct substitution in existing layouts where firmware accommodates the memory boundary.
P87C54X2BN,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:
- 33MHz
- 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:
P87C54X2BN,112 FAQ
1.How can I place an order for P87C54X2BN,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87C54X2BN,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 P87C54X2BN,112 reliable?
The price and inventory of P87C54X2BN,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87C54X2BN,112 is usually 5 days.
3.What payment methods are accepted for P87C54X2BN,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87C54X2BN,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87C54X2BN,112?
P87C54X2BN,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87C54X2BN,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 P87C54X2BN,112?
For technical support, including P87C54X2BN,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87C54X2BN,112 requirements.
6.How does Aetrix verify that P87C54X2BN,112 is sourced from the original manufacturer or authorized distributors?
All P87C54X2BN,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 P87C54X2BN,112 meets industry standards.
7.What is the process for return or replacement of P87C54X2BN,112?
All P87C54X2BN,112 units undergo pre-shipment inspection (PSI). If there is an issue with P87C54X2BN,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 P87C54X2BN,112 part is unused and in its original packaging.
Return procedure for P87C54X2BN,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P87C54X2BN,112 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…
