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NXP Semiconductors P89CV51RD2FBC,557
- Part No.:
- P89CV51RD2FBC,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-TQFP
- Datasheet:
-
P89CV51RD2FBC,557.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,443
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Product details
Overview
P89CV51RD2FBC from NXP Semiconductors is a 8-bit 80C51 microcontroller with 64 kB on-chip flash, 1 kB RAM, SPI interface, and programmable 6/12-clock CPU mode. It supports In-Application Programming (IAP) with 128-byte page erase for non-volatile data storage and operates up to 40 MHz in 12× mode. Used in industrial control systems requiring field-upgradable firmware and compact embedded logic.
For engineers reviewing the P89CV51RD2FBC datasheet, P89CV51RD2FBC pinout, P89CV51RD2FBC application, or P89CV51RD2FBC equivalent, key selection criteria include flash size (64 kB), IAP-enabled 128-B page erase timing (≤30 ms), SPI + enhanced UART peripheral set, TQFP44 package compatibility, and drop-in software compatibility with legacy P89C51RD2 designs.
Technical Context
The P89CV51RD2FBC implements an enhanced 80C51 core with dual data pointers (DPTR0/DPTR1), a 5-channel Programmable Counter Array (PCA) supporting PWM and capture/compare, and three 16-bit timers. Its memory architecture includes 1 kB internal RAM (expandable via EXTRAM bit), 768 B on-chip XDATA, and 64 kB flash organized in 128-B erasable pages.
It features configurable clock modes: 12-clock (default) or 6-clock operation selectable via SFR bit, with peripherals (UART, PCA, timers) independently configurable to run in either mode while CPU executes in 6-clock mode. The SPI interface operates as master or slave with programmable polarity and phase, and low-EMI ALE inhibit mode reduces radiated emissions during idle operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Enhanced 80C51 CPU with 6/12-clock mode selection and dual DPTR registers |
| Flash Memory | 64 kB on-chip flash with 128-B page erase (≤30 ms) and full-chip erase (150 ms) |
| Data RAM | 1 kB internal RAM, including 768 B XDATA accessible via MOVX with EXTRAM control |
| Operating Frequency | 0–40 MHz in 12× mode; 0–20 MHz in 6× mode |
| Peripherals | SPI, enhanced UART, 5-channel PCA (PWM/capture/compare), 3× 16-bit timers, WDT, 4× 8-bit I/O ports |
| Interrupt System | 10 interrupt sources (including PCA, UART, timers, external INT0/INT1) with 4 priority levels |
| Package | TQFP44 (10 × 10 × 1.0 mm), lead-free, RoHS-compliant |
Pinout & Package
Package: TQFP44 (SOT376-1), 44-pin plastic thin quad flat package, body size 10 × 10 × 1.0 mm, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | Port 0 bidirectional I/O / AD0–AD7 multiplexed bus | Open-drain port used for external memory addressing/data bus; requires external pull-ups for general I/O |
| P1[0]/T2 | Port 1 bit 0 / Timer 2 external count input | High-current (16 mA) I/O pin supporting T2 clock-in or clock-out functionality |
| P1[4]/CEX1/SS | Port 1 bit 4 / PCA channel 1 I/O / SPI slave select | Shared function pin enabling PCA capture/compare or SPI slave mode control |
| P1[5]/CEX2/MOSI | Port 1 bit 5 / PCA channel 2 I/O / SPI master output | Enables simultaneous use of PCA Module 2 and SPI master transmit path |
| P3[0]/RXD | Port 3 bit 0 / UART serial input | Dedicated full-duplex UART receive line compatible with TTL-level serial communication |
| RST | Reset input | Active-HIGH reset requiring ≥2 machine cycles; initiates boot vector check and internal initialization |
| XTAL1/XTAL2 | Crystal oscillator inputs | Supports quartz crystal or ceramic resonator (0–40 MHz); internal inverting amplifier drives external timing source |
| EA | External Access Enable | Strapped HIGH for internal code execution; pulled LOW to enable external program memory fetch |
Key Features
| Feature | Design Value |
|---|---|
| 128-B flash page erase | Enables efficient non-volatile data storage within code memory space without requiring dedicated EEPROM |
| IAP + ISP dual programming | Allows firmware updates in-system via UART or in-application via API calls - no external programmer needed |
| 6/12-clock mode flexibility | Reduces power consumption by halving instruction cycle rate while maintaining peripheral timing independence |
| 5-channel PCA with PWM | Provides hardware timer-based pulse-width modulation and event capture without CPU overhead |
| Low-EMI ALE inhibit | Disables ALE output during idle periods to minimize electromagnetic interference in noise-sensitive environments |
| Dual data pointers (DPTR0/DPTR1) | Accelerates block memory transfers and string operations by eliminating pointer reload overhead |
Applications
| Industrial PLC I/O Module | Smart Energy Metering |
|---|---|
Use Scenario: Standalone I/O expansion node in distributed control systems with local logic execution and RS-485 communication. IC Role / Device Role / Timing Role: Main controller executing ladder logic, managing GPIO, SPI-driven ADC/DAC, and UART-based Modbus RTU protocol stack. Use Value: 64 kB flash stores complex control algorithms and calibration tables; 128-B IAP enables remote firmware patching without device replacement. | Use Scenario: Embedded metering unit performing real-time energy calculation, tamper detection, and secure data logging. IC Role / Device Role / Timing Role: Primary MCU handling metrology sampling via SPI-connected sigma-delta ADC, RTC synchronization, and secure flash-based event log storage. Use Value: Dual DPTR and PCA support precise time-stamped event capture; 1 kB RAM accommodates floating-point math buffers and encryption context. |
| Legacy Equipment Retrofit | Automotive Body Control Unit |
Use Scenario: Drop-in replacement for obsolete P89C51RD2 in aging industrial HMIs and motor controllers. IC Role / Device Role / Timing Role: Pin- and code-compatible upgrade providing enhanced debug capability, faster flash erase, and SPI peripheral for display interface. Use Value: Software compatibility eliminates requalification effort; TQFP44 footprint matches existing PCB layout; 40 MHz max frequency improves response latency. | Use Scenario: Low-cost body electronics module managing door locks, window lift, and interior lighting with LIN bus interface. IC Role / Device Role / Timing Role: Central controller coordinating PWM dimming, switch debouncing, and LIN transceiver timing via UART-to-LIN bridge. Use Value: Integrated WDT and power-down mode with external interrupt wake-up ensure robustness in automotive sleep/wake cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51ED2-RL24 | 64 kB flash, 1.25 kB RAM, built-in bootloader, but no SPI; uses different IAP command set and lacks PCA | Requires external SPI peripheral for sensor interfacing; limited PWM resolution vs. 5-channel PCA | Select when legacy Atmel toolchain compatibility is required and SPI is not needed |
| P89V51RD2FA | Same core, 64 kB flash, 1 kB RAM, but PLCC44 package (SOT187-2) and identical feature set | No PCB layout change needed if socket-based design; higher profile and less suitable for automated assembly | Select for through-hole prototyping or legacy PLCC-based systems where rework tolerance is critical |
Compared with AT89C51ED2-RL24, P89CV51RD2FBC delivers integrated SPI and superior PWM flexibility; versus P89V51RD2FA, it offers identical functionality in a surface-mount TQFP44 package optimized for high-volume production and thermal performance.
Availability
P89CV51RD2FBC is available at Aetrix Electronics and suitable for industrial automation, smart metering, and legacy equipment retrofit requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for P89CV51RD2FBC 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.
The P89CV51RD2FBC belongs to NXP's legacy 80C51 microcontroller family, designed to extend the life of proven 8051-based architectures with modern enhancements like IAP, SPI, and dual DPTR-targeting cost-sensitive, reliability-critical embedded control.
FAQ
What is the maximum operating frequency of the P89CV51RD2FBC?
The P89CV51RD2FBC supports up to 40 MHz in 12-clock mode and up to 20 MHz in 6-clock mode. Frequency selection is controlled via SFR bits and remains stable across the full industrial temperature range (−40 °C to +85 °C). The oscillator circuit accepts quartz crystals or ceramic resonators directly connected between XTAL1 and XTAL2 pins.
Does the P89CV51RD2FBC support in-application programming (IAP)?
Yes, the P89CV51RD2FBC supports IAP using its built-in LOW-state routines. Code memory can be erased in 128-byte pages (≤30 ms) or full-chip (150 ms), and programmed byte-by-byte. IAP is invoked via a common entry point and requires no external hardware - enabling field firmware updates directly from running application code.
What are the key differences between P89CV51RD2FBC and P89C51RD2?
The P89CV51RD2FBC adds SPI interface, reduces flash erase granularity from 4 kB to 128 B, increases RAM from 512 B to 1 kB, and improves full-chip erase time to 150 ms. It retains full software and pin compatibility with P89C51RD2, making it a drop-in replacement with enhanced functionality for new designs and legacy upgrades.
Which package type does P89CV51RD2FBC use?
The P89CV51RD2FBC uses the TQFP44 package (SOT376-1): a 44-pin plastic thin quad flat package with 10 × 10 × 1.0 mm body dimensions and standard 0.8 mm lead pitch. This surface-mount package supports automated assembly and provides better thermal dissipation than PLCC variants.
How many interrupt sources and priority levels does the P89CV51RD2FBC support?
The P89CV51RD2FBC supports ten interrupt sources - including external INT0/INT1, timer overflows (T0/T1/T2), UART, PCA, and SPI - with four programmable priority levels. Each interrupt can be individually enabled/disabled and assigned high/low priority via IE and IP registers, enabling deterministic real-time response in multitasked embedded applications.
P89CV51RD2FBC,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:
- 64KB (64K 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:
P89CV51RD2FBC,557 FAQ
1.How can I place an order for P89CV51RD2FBC,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89CV51RD2FBC,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 P89CV51RD2FBC,557 reliable?
The price and inventory of P89CV51RD2FBC,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89CV51RD2FBC,557 is usually 5 days.
3.What payment methods are accepted for P89CV51RD2FBC,557?
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P89CV51RD2FBC,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89CV51RD2FBC,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 P89CV51RD2FBC,557?
For technical support, including P89CV51RD2FBC,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89CV51RD2FBC,557 requirements.
6.How does Aetrix verify that P89CV51RD2FBC,557 is sourced from the original manufacturer or authorized distributors?
All P89CV51RD2FBC,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 P89CV51RD2FBC,557 meets industry standards.
7.What is the process for return or replacement of P89CV51RD2FBC,557?
All P89CV51RD2FBC,557 units undergo pre-shipment inspection (PSI). If there is an issue with P89CV51RD2FBC,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 P89CV51RD2FBC,557 part is unused and in its original packaging.
Return procedure for P89CV51RD2FBC,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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