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NXP Semiconductors P89CV51RC2FBC,557
- Part No.:
- P89CV51RC2FBC,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-TQFP
- Datasheet:
-
P89CV51RC2FBC,557.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
P89CV51RC2FBC from NXP Semiconductors is an 8-bit 80C51 microcontroller with 32 kB on-chip flash, 1 kB RAM, SPI interface, PCA with PWM/capture/compare, three 16-bit timers, and 40 MHz operation in 12-clock mode. It serves as a drop-in, software-compatible replacement for P89C51RC2 devices in industrial control, sensor interface, and legacy 8051-based embedded systems.
For engineers reviewing the P89CV51RC2FBC datasheet, P89CV51RC2FBC pinout, P89CV51RC2FBC application, or P89CV51RC2FBC equivalent, key selection considerations include 128-B page-erase capability for non-volatile data storage, dual data pointer support, 6/12-clock mode programmability, and TQFP44 package compatibility with existing 8051 PCB layouts.
Technical Context
The P89CV51RC2FBC implements a high-performance 80C51 CPU core with selectable 6-clock or 12-clock execution modes controlled via SFR bit, enabling peripherals (PCA, UART, timers) to operate independently at either clock rate. Its memory architecture includes 32 kB flash organized in 128-B erasable pages, 1 kB RAM (expanded from 512 B in predecessor), and 768 B on-chip XDATA space.
It integrates SPI as a dedicated peripheral-absent in P89C51RC2-and supports In-Application Programming (IAP) and In-System Programming (ISP) using identical low-level routines. The enhanced UART, WatchDog Timer, four priority-level interrupts, and second DPTR register enable robust real-time firmware development without external support logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 8-bit CPU with 6/12-clock mode selection via SFR |
| Flash Memory | 32 kB on-chip flash, erasable in 128-B pages (30 ms/page) |
| Data RAM | 1 kB internal RAM (512 B more than P89C51RC2) |
| Operating Frequency | 0–40 MHz in 12× mode; 0–20 MHz in 6× mode |
| Peripherals | SPI interface, enhanced UART, PCA with 5 capture/compare channels, three 16-bit timers |
| Package | TQFP44 (10 × 10 × 1.0 mm, SOT376-1) |
| Supply Voltage | 5 V nominal, compatible with standard TTL/CMOS logic levels |
Pinout & Package
TQFP44 package (SOT376-1), 10 × 10 × 1.0 mm body, 44 leads. Pinout optimized for 8051-compatible board layout with multiplexed address/data bus (P0), high-order address (P2), and dedicated I/O (P1, P3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | Port 0 bidirectional I/O / AD0–AD7 | Open-drain port used as multiplexed low-order address/data bus during external memory access; requires external pull-ups for general-purpose I/O |
| P1[0]/T2 | Port 1 bit 0 / Timer 2 input/output | General-purpose I/O with internal pull-up; T2 provides external count input or clock-out signal for timer/counter 2 |
| P1[5]/CEX2/MOSI | Port 1 bit 5 / PCA channel 2 / SPI master output | Shared function pin: supports PCA capture/compare or SPI data transmission; high-current drive (16 mA) |
| P2[0]–P2[7] | Port 2 bidirectional I/O / A8–A15 | Internal pull-up port delivering high-order address bits during external program/data memory access |
| P3[0]/RXD | Port 3 bit 0 / UART serial input | Dedicated UART receive line; interrupt-capable input for asynchronous serial communication |
| RST | Reset input | Active-HIGH reset requiring ≥2 machine cycles; initiates boot sequence from 0000H or boot vector if status bit = 1 |
| XTAL1/XTAL2 | Oscillator inputs | Connects to crystal or resonator (0–40 MHz); XTAL2 is buffered output driving external clock source |
| EA | External Access Enable | Strap HIGH for internal code execution; LOW enables fetch from external program memory |
| ALE | Address Latch Enable | Outputs address latch pulse at 1/6 crystal frequency (12× mode); inhibitable via AO bit for low-EMI operation |
Key Features
| Feature | Design Value |
|---|---|
| 128-B flash page erase | Enables efficient use of code memory for non-volatile data storage with 30 ms/page erase time |
| Dual data pointers (DPTR0/DPTR1) | Accelerates data movement between memory regions via DPS bit toggle in AUXR1 register |
| SPI interface | Full-duplex synchronous serial peripheral absent in P89C51RC2, supporting master/slave operation with configurable clock polarity/phase |
| Programmable Counter Array (PCA) | Five independent capture/compare modules with PWM generation, eliminating need for external timing ICs |
| 6/12-clock mode switching | Runtime reconfiguration of CPU clock division without affecting peripheral timing, optimizing power/performance trade-offs |
Applications
| Industrial Motor Control | Legacy System Upgrade |
|---|---|
Use Scenario: Closed-loop speed regulation of DC/stepper motors in factory automation panels. IC Role / Device Role / Timing Role: Primary controller executing PID algorithms, generating PWM via PCA, and communicating via UART/SPI with driver ICs and sensors. Use Value: 32 kB flash stores complex motor profiles; 128-B page erase allows runtime logging of fault events to code memory without external EEPROM. | Use Scenario: Replacement of obsolete P89C51RC2 in deployed HVAC control boards. IC Role / Device Role / Timing Role: Drop-in software-compatible MCU retaining identical pinout and instruction set while adding SPI for new sensor integration. Use Value: Eliminates redesign cost-no PCB changes required-and enables field firmware updates via ISP through existing UART interface. |
| Smart Sensor Node | Embedded Data Logger |
Use Scenario: Battery-powered environmental monitor collecting temperature/humidity data over RS-485 network. IC Role / Device Role / Timing Role: Central processing unit managing ADC sampling, SPI-driven sensor reads, UART-to-RS485 translation, and watchdog supervision. Use Value: Low EMI mode (ALE inhibit) reduces radiated emissions; 1 kB RAM buffers multi-sensor readings before SPI transmission. | Use Scenario: Standalone device recording analog measurements at fixed intervals onto SD card via SPI. IC Role / Device Role / Timing Role: Host controller managing FAT file writes, timestamping via PCA timers, and wear-leveling logic in flash memory. Use Value: IAP capability permits safe over-the-air firmware updates; 128-B page granularity minimizes write latency during concurrent logging and update operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8051 microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P89C51RC2FBC | No SPI interface; 512 B RAM; 4 kB flash erase block size | Lacks non-volatile data storage capability via IAP; no hardware SPI for sensor expansion | Select only when SPI and expanded RAM are unnecessary and legacy code compatibility is absolute |
| AT89C51RC2-24PU | Same 8051 core, 32 kB flash, but no PCA or dual DPTR; 24 MHz max frequency | Missing PCA limits PWM/timing flexibility; lower max clock restricts real-time throughput | Choose for cost-sensitive designs where PCA and 40 MHz operation are not required |
Compared with P89C51RC2FBC and AT89C51RC2-24PU, the P89CV51RC2FBC delivers superior firmware flexibility through 128-B page erase, integrated SPI, and dual data pointers-enabling compact, feature-rich implementations without external glue logic or memory expansion.
Availability
P89CV51RC2FBC is available at Aetrix Electronics and suitable for industrial motor control, legacy system upgrades, smart sensor nodes, and embedded data loggers requiring stable component supply across extended product lifecycles.
Supply support for P89CV51RC2FBC 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The P89CV51RC2FBC belongs to NXP's legacy 80C51 microcontroller family, designed to extend the life of 8051-based systems with enhanced flash programming, peripheral integration, and backward compatibility for industrial and control applications.
FAQ
What is the maximum operating frequency of the P89CV51RC2FBC?
The P89CV51RC2FBC supports up to 40 MHz in 12-clock mode and 20 MHz in 6-clock mode. This frequency range is validated across the full industrial temperature range (−40 °C to +85 °C) and enables deterministic real-time response in time-critical embedded applications. The P89CV51RC2FBC achieves this performance while maintaining full software compatibility with earlier 8051 derivatives.
Does the P89CV51RC2FBC support In-Application Programming (IAP)?
Yes, the P89CV51RC2FBC supports IAP using 128-B page-erase operations, allowing firmware to reprogram flash memory during normal operation. This capability is implemented via low-level routines accessible through a common entry point, enabling safe over-the-air updates or runtime configuration storage. The P89CV51RC2FBC retains full IAP compatibility with its ISP bootloader and parallel programming methods.
How does the SPI interface on the P89CV51RC2FBC differ from the P89C51RC2FBC?
The P89CV51RC2FBC includes a fully integrated SPI interface-P1[5]/MOSI, P1[6]/MISO, P1[7]/SPICLK, and P1[4]/SS-which is absent in the P89C51RC2FBC. This hardware SPI supports master/slave operation, configurable clock polarity and phase, and direct register access via SPCR/SPSR/SPDAT. The P89CV51RC2FBC uses these pins exclusively for SPI when enabled, eliminating software bit-banging overhead.
What package type is used for the P89CV51RC2FBC?
The P89CV51RC2FBC uses a TQFP44 package (SOT376-1) with 44 leads, 10 × 10 × 1.0 mm body dimensions, and standard 0.8 mm lead pitch. This RoHS-compliant package provides thermal and electrical performance equivalent to PLCC44 variants while enabling higher-density PCB layouts. Pin assignments match the 8051 standard, ensuring mechanical and functional compatibility with existing TQFP44 footprints.
Can the P89CV51RC2FBC execute code from external memory?
Yes, the P89CV51RC2FBC can execute code from external program memory when the EA pin is strapped LOW. In this configuration, the device fetches instructions from external EPROM or flash via P0 (AD0–AD7) and P2 (A8–A15), with PSEN controlling read strobes. Internal 32 kB flash remains accessible for data storage or hybrid execution models, and the P89CV51RC2FBC maintains full 64 kB CODE space addressing capability.
P89CV51RC2FBC,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-TQFP
- Series:
- 89C
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 40MHz
- Connectivity:
- EBI/EMI, SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P89CV51RC2FBC,557 FAQ
1.How can I place an order for P89CV51RC2FBC,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89CV51RC2FBC,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 P89CV51RC2FBC,557 reliable?
The price and inventory of P89CV51RC2FBC,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89CV51RC2FBC,557 is usually 5 days.
3.What payment methods are accepted for P89CV51RC2FBC,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89CV51RC2FBC,557 transactions.
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4.How is shipping managed for P89CV51RC2FBC,557?
P89CV51RC2FBC,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89CV51RC2FBC,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 P89CV51RC2FBC,557?
For technical support, including P89CV51RC2FBC,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89CV51RC2FBC,557 requirements.
6.How does Aetrix verify that P89CV51RC2FBC,557 is sourced from the original manufacturer or authorized distributors?
All P89CV51RC2FBC,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 P89CV51RC2FBC,557 meets industry standards.
7.What is the process for return or replacement of P89CV51RC2FBC,557?
All P89CV51RC2FBC,557 units undergo pre-shipment inspection (PSI). If there is an issue with P89CV51RC2FBC,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 P89CV51RC2FBC,557 part is unused and in its original packaging.
Return procedure for P89CV51RC2FBC,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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