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NXP Semiconductors P89CV51RB2FA,512
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- Part No.:
- P89CV51RB2FA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89CV51RB2FA,512.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
P89CV51RB2FA,512 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 16 kB on-chip flash, 1 kB RAM, SPI interface, and 6/12-clock CPU mode-designed as a drop-in, software-compatible replacement for P89C51RB2 devices in industrial control and embedded instrumentation applications.
For engineers reviewing the P89CV51RB2FA,512 datasheet, P89CV51RB2FA,512 pinout, P89CV51RB2FA,512 application, or P89CV51RB2FA,512 equivalent, key selection criteria include 128-B page-erase capability for non-volatile data storage, dual DPTR support for efficient memory transfers, and PLCC44 packaging with full I/O port multiplexing including PCA, UART, and SPI peripherals.
Technical Context
The P89CV51RB2FA,512 implements a high-performance 80C51 core with selectable 6-clock or 12-clock execution modes-both programmable on-the-fly via SFR-and supports concurrent peripheral operation (PCA, timers, UART) in either mode. Its memory architecture includes 1 kB of internal RAM (expandable to 768 B XRAM), 16 kB flash organized in 128-B erasable pages, and dual 16-bit data pointers controlled by DPS bit in AUXR1.
It integrates SPI as a master/slave interface with MOSI/MISO/SPICLK/SS on Port 1 pins, a 5-channel Programmable Counter Array (PCA) supporting PWM, capture, and compare functions, and enhanced UART with SMOD0/SMOD1 baud rate control-enabling deterministic real-time I/O handling in resource-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 8-bit CPU with 6/12-clock mode selection and on-the-fly SFR switching |
| Flash Memory | 16 kB on-chip flash with 128-B page erase (30 ms/page); enables firmware updates and non-volatile data logging without full chip erase |
| Data RAM | 1 kB internal RAM + 768 B XRAM; EXTRAM bit controls MOVX addressing between on-chip and external memory spaces |
| Clock Frequency | 0–40 MHz in 12× mode; 0–20 MHz in 6× mode; ALE frequency configurable via AO bit (1/2 or 1/6 oscillator) |
| Peripherals | SPI interface (MOSI/MISO/SPICLK/SS), enhanced UART, three 16-bit timers, PCA with five channels, WDT, and four 8-bit I/O ports |
| Package | PLCC44 (SOT187-2); 44-pin plastic leaded chip carrier with 1.27 mm pitch and exposed thermal pad |
| Operating Range | −40 °C to +85 °C; 5 V supply; low-EMI mode via ALE inhibit (AO = 1) |
Pinout & Package
Package: PLCC44 (SOT187-2), 44-lead plastic leaded chip carrier with 1.27 mm pitch and body size 16.5 × 16.5 × 4.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]–P0[7] | Port 0 bidirectional I/O / AD0–AD7 | Open-drain port used for multiplexed 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 | High-current (16 mA) I/O pin supporting external count input or clock-out from Timer 2 |
| P1[4]/CEX1/SS | Port 1 bit 4 / PCA channel 1 / 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 / SPI master output | Simultaneous support for PCA timing and SPI serial data transmission |
| P1[7]/CEX4/SPICLK | Port 1 bit 7 / PCA channel 4 / SPI clock | Configurable as PCA I/O or SPI synchronous clock signal with programmable polarity/phase |
| RST | Reset input | Active-HIGH reset requiring ≥2 machine cycles; initiates boot vector check and status bit evaluation |
| EA | External Access Enable | Strapped HIGH for internal code execution; LOW enables fetch from external program memory |
| XTAL1/XTAL2 | Oscillator inputs | Supports crystal (0–40 MHz) or external clock source; internal inverting amplifier with feedback resistor |
Key Features
| Feature | Design Value |
|---|---|
| 128-B flash page erase | Enables fine-grained firmware updates and reliable non-volatile data storage within code memory space |
| Dual data pointer (DPTR0/DPTR1) | Accelerates memory-to-memory transfers and simplifies buffer management in communication stacks |
| SPI interface with full pin multiplexing | Reduces external component count for sensor interfacing, display drivers, or EEPROM expansion |
| Programmable Counter Array (5-channel) | Provides independent PWM generation, input capture, and time-stamped event detection without CPU overhead |
| 6/12-clock CPU mode with peripheral independence | Allows dynamic power/performance scaling while maintaining real-time peripheral responsiveness |
Applications
| Industrial PLC I/O Module | Smart Sensor Node |
|---|---|
Use Scenario: Localized logic execution and analog/digital I/O conditioning in distributed automation cabinets with limited board space. IC Role / Device Role / Timing Role: Main controller executing ladder logic, managing ADC/DAC interfaces via Port 0/2, and synchronizing fieldbus timing via PCA-generated pulses. Use Value: 16 kB flash stores multiple firmware versions; 128-B page erase allows over-the-air parameter updates without disrupting control loop execution. | Use Scenario: Battery-powered environmental monitoring node integrating temperature/humidity sensors and wireless transceiver control. IC Role / Device Role / Timing Role: System orchestrator managing SPI-based sensor reads, UART-based debug output, and low-power idle/wake cycles using WDT and external interrupts. Use Value: Dual DPTR enables simultaneous sensor data buffering and transceiver command framing; 6-clock mode reduces active current to extend battery life. |
| Legacy Equipment Retrofit | Embedded HMI Controller |
Use Scenario: Drop-in replacement for obsolete P89C51RB2 in aging medical or test equipment requiring no PCB redesign. IC Role / Device Role / Timing Role: Pin- and code-compatible MCU retaining original firmware while adding SPI for modern peripheral integration. Use Value: Software compatibility eliminates requalification effort; SPI interface adds SD card logging or LCD driver support without layout changes. | Use Scenario: Front-panel controller for industrial machinery with keypad, LED indicators, and character LCD display. IC Role / Device Role / Timing Role: Real-time UI manager driving parallel LCD interface via Port 0, scanning matrix keypad via Port 3, and generating PWM dimming signals via PCA. Use Value: Five PCA channels independently control backlight brightness, buzzer tone, and LED pulse patterns-freeing CPU cycles for user interaction logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8051-based microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P89C51RB2FA | Lacks SPI interface; 4 kB page erase; 512 B RAM; no dual DPTR | Not suitable for SPI-dependent peripherals or non-volatile data storage in flash | Select only when legacy code compatibility is absolute priority and SPI/expanded RAM are unused |
| AT89C51ED2-RL24PU | 16 kB flash, 1 kB RAM, but uses ISP via UART only; no PCA; no 6-clock mode | Requires UART-based programming infrastructure; lacks hardware PWM/capture for precise timing tasks | Prefer when UART-only ISP suffices and PCA functionality is unnecessary |
Compared with P89C51RB2FA and AT89C51ED2-RL24PU, the P89CV51RB2FA,512 delivers unique value through its 128-B flash page erase for robust data logging, integrated SPI for sensor/display expansion, and dual DPTR for efficient memory operations-making it optimal for retrofit and new designs requiring both legacy compatibility and modern peripheral integration.
Availability
P89CV51RB2FA,512 is available at Aetrix Electronics and suitable for industrial control systems, smart sensor nodes, legacy equipment retrofits, and embedded HMI controllers requiring stable component supply across extended product lifecycles.
Supply support for P89CV51RB2FA,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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The P89CV51RB2FA,512 belongs to NXP's legacy 80C51 microcontroller family, engineered to extend the lifecycle of proven 8051-based designs while adding SPI, enhanced memory management, and flexible clocking for cost-sensitive embedded systems.
FAQ
What is the maximum operating frequency of the P89CV51RB2FA,512?
The P89CV51RB2FA,512 supports up to 40 MHz in 12-clock mode and 20 MHz in 6-clock mode. Frequency selection is controlled by SFR bits and remains stable across the full −40 °C to +85 °C industrial temperature range. The P89CV51RB2FA,512 uses an internal oscillator amplifier compatible with standard quartz crystals or external clock sources.
Does the P89CV51RB2FA,512 support in-application programming (IAP)?
Yes, the P89CV51RB2FA,512 supports IAP with 128-B page erase capability-enabling firmware updates and non-volatile data storage directly from running application code. IAP routines reside in a protected boot block and are accessible via a common entry point, ensuring safe execution without interrupting real-time tasks. This feature is fully implemented in the P89CV51RB2FA,512 silicon.
How does the dual data pointer (DPTR) function in the P89CV51RB2FA,512?
The P89CV51RB2FA,512 implements two independent 16-bit data pointers (DPTR0 and DPTR1), selected via the DPS bit in AUXR1. This allows concurrent addressing of separate memory regions-for example, streaming sensor data into one buffer while transmitting from another-without software-managed register swapping. The P89CV51RB2FA,512's dual DPTR significantly accelerates DMA-like operations in communication protocols.
What package type is used for the P89CV51RB2FA,512?
The P89CV51RB2FA,512 is supplied in a PLCC44 package (SOT187-2), a 44-lead plastic leaded chip carrier with 1.27 mm pitch and dimensions of 16.5 × 16.5 × 4.0 mm. This package provides robust thermal performance and mechanical reliability for industrial PCB assembly, and is pin-compatible with other members of the P89CV51RB2/RC2/RD2 family in PLCC44 format.
Can the P89CV51RB2FA,512 operate in low-power modes?
Yes, the P89CV51RB2FA,512 supports Idle mode (CPU halted, peripherals active) and Power-down mode (all clocks stopped, RAM retained), with wake-up via external interrupts or WDT timeout. The ALE inhibit (AO bit) further reduces EMI and dynamic power consumption. These modes are fully functional in the P89CV51RB2FA,512 and validated across its specified temperature and voltage range.
P89CV51RB2FA,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 89C
- Packaging:
- Tube
- 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:
- 16KB (16K 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:
P89CV51RB2FA,512 FAQ
1.How can I place an order for P89CV51RB2FA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89CV51RB2FA,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 P89CV51RB2FA,512 reliable?
The price and inventory of P89CV51RB2FA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89CV51RB2FA,512 is usually 5 days.
3.What payment methods are accepted for P89CV51RB2FA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89CV51RB2FA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89CV51RB2FA,512?
P89CV51RB2FA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89CV51RB2FA,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 P89CV51RB2FA,512?
For technical support, including P89CV51RB2FA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89CV51RB2FA,512 requirements.
6.How does Aetrix verify that P89CV51RB2FA,512 is sourced from the original manufacturer or authorized distributors?
All P89CV51RB2FA,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 P89CV51RB2FA,512 meets industry standards.
7.What is the process for return or replacement of P89CV51RB2FA,512?
All P89CV51RB2FA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P89CV51RB2FA,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 P89CV51RB2FA,512 part is unused and in its original packaging.
Return procedure for P89CV51RB2FA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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