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NXP Semiconductors P89CV51RD2FA,512
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- Part No.:
- P89CV51RD2FA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89CV51RD2FA,512.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,938
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Product details
Overview
P89CV51RD2FA,512 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 64 kB on-chip flash code memory, 1 kB RAM, SPI interface, and 6/12-clock CPU mode-designed as a drop-in, software-compatible replacement for P89C51RD2 devices in industrial control and embedded instrumentation applications.
For engineers reviewing the P89CV51RD2FA,512 datasheet, P89CV51RD2FA,512 pinout, P89CV51RD2FA,512 application, or P89CV51RD2FA,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 package compatibility with legacy 8051-based PCB layouts.
Technical Context
The P89CV51RD2FA,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 mixed-mode peripheral operation (e.g., UART/PCA running at 12-clock while CPU runs at 6-clock). Its flash architecture enables 128-B page erase (≤30 ms) and full-chip erase (150 ms), enabling robust IAP-based firmware updates and code-memory reuse for data logging.
Memory organization includes 1 kB internal RAM (512 B direct + 512 B indirect), 768 B on-chip XDATA, and 64 kB flash with boot vector flexibility. Dual data pointers (DPTR0/DPTR1), enhanced UART, PCA with five capture/compare channels, and SPI with master/slave capability provide deterministic real-time I/O control for sensor interfacing and multi-device communication.
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 | 64 kB on-chip flash with 128-B page erase (≤30 ms) and chip erase (150 ms) |
| Data RAM | 1 kB total: 512 B directly addressable + 512 B indirectly addressable (IDATA) |
| Operating Frequency | 0–40 MHz in 12× mode; 0–20 MHz in 6× mode-supports wide-range crystal/resonator inputs |
| Peripherals | SPI interface, enhanced UART, three 16-bit timers, PCA with five CEX channels, WDT, and ten interrupt sources |
| Package | PLCC44 (SOT187-2): 44-pin plastic leaded chip carrier with 1.27 mm pitch and body size 16.5 × 16.5 × 4.0 mm |
| Supply Voltage | 5 V ±10 % - compatible with standard TTL/CMOS logic interfaces and legacy 5 V system rails |
Pinout & Package
Package: PLCC44 (SOT187-2), 44-pin plastic leaded chip carrier with J-lead configuration, 1.27 mm pitch, and 16.5 × 16.5 × 4.0 mm body dimensions.
| 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 transfer; requires external pull-ups for general-purpose 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; also usable as GPIO when not assigned to timer |
| P1[4]/CEX1/SS | Port 1 bit 4 / PCA Module 1 I/O / SPI slave select | Shared function pin: enables PCA capture/compare or SPI slave mode activation via hardware-level SS assertion |
| P1[5]/CEX2/MOSI | Port 1 bit 5 / PCA Module 2 I/O / SPI master output | Simultaneous support for PCA channel 2 and SPI master data transmission; no conflict in concurrent use |
| P2[0]–P2[7] | Port 2 bidirectional I/O / A8–A15 high-order address bus | Internal pull-up port providing upper address byte during external memory access; retains I/O functionality when not in addressing mode |
| P3[0]/RXD | Port 3 bit 0 / UART serial receive input | Dedicated full-duplex UART input with internal pull-up; supports asynchronous communication at up to 115.2 kbps (40 MHz clk) |
| RST | Active-high reset input | Requires ≥2 machine cycles HIGH after oscillator stabilization; initiates hardware reset sequence and clears SFRs except RAM contents |
| EA | External access enable input | Strapped HIGH to execute from internal flash; tied LOW to fetch code from external program memory (e.g., EPROM) |
| ALE | Address latch enable output | Emits at 1/6 crystal frequency (12× mode) or 1/3 (6× mode); can be disabled via AO bit in AUXR to reduce EMI |
| XTAL1/XTAL2 | Oscillator input/output | Supports quartz crystals (0–40 MHz) or ceramic resonators; internal inverter provides full-swing CMOS output on XTAL2 |
Key Features
| Feature | Design Value |
|---|---|
| 128-B flash page erase | Enables efficient non-volatile data storage within code memory-ideal for parameter logging without external EEPROM |
| Dual data pointers (DPTR0/DPTR1) | Eliminates software overhead for memory-to-memory transfers; accelerates buffer management in communication stacks |
| SPI interface with master/slave mode | Reduces BOM cost by replacing discrete SPI peripherals; supports daisy-chain sensor networks and flash memory expansion |
| Programmable Counter Array (PCA) | Five independent capture/compare modules enable simultaneous PWM generation, input capture, and time-stamping |
| Low-EMI ALE inhibit mode | Disabling ALE via AO bit reduces radiated emissions-critical for CE/FCC compliance in compact industrial enclosures |
Applications
| Industrial PLC I/O Module | Smart Energy Metering |
|---|---|
Use Scenario: Real-time acquisition of analog sensor inputs (voltage/current) and digital status signals in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Central 8051-compatible controller managing ADC sequencing, relay actuation, and Modbus RTU over RS-485. Use Value: 64 kB flash stores dual firmware images for fail-safe field updates; 128-B page erase allows runtime parameter storage without disrupting main application. |
Use Scenario: Tamper-resistant electricity meter with pulse counting, tariff switching, and secure data logging. IC Role / Device Role / Timing Role: Primary metrology controller executing energy integration algorithms and SPI-driven LCD display refresh. Use Value: Dual DPTR enables concurrent DMA-like transfers between ADC FIFO and flash log buffer; PCA generates precise 1 Hz timebase for billing intervals. |
| Legacy Equipment Retrofit | Embedded Test Instrumentation |
Use Scenario: Drop-in replacement for obsolete P89C51RD2 in aging medical analyzers requiring minimal PCB rework. IC Role / Device Role / Timing Role: Pin- and code-compatible MCU handling stepper motor control, keypad scanning, and serial diagnostics. Use Value: PLCC44 footprint and identical pinout ensure zero layout change; ISP capability enables in-field firmware upgrades without removing the IC. |
Use Scenario: Portable handheld tester for sensor calibration, featuring analog front-end control and USB-to-serial bridge. IC Role / Device Role / Timing Role: Host controller managing SPI-configured precision DACs, UART debug interface, and watchdog-monitored power sequencing. Use Value: Enhanced UART with SMOD0/SMOD1 bits supports high-speed baud rates (e.g., 921.6 kbps at 40 MHz); WDT ensures recovery from transient noise-induced lockups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8051-based microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51ED2-RL24PU | 512 B RAM, 64 kB flash, but lacks SPI and PCA; uses 4-clock core (higher throughput per MHz) | No native SPI limits sensor interface flexibility; no PCA requires external timers for PWM/capture | Select when SPI/PCA are unnecessary and higher instruction throughput at lower clock frequencies is prioritized |
| P89V51RD2FA,512 | Same pinout and firmware compatibility, but uses 3.3 V supply (not 5 V); flash endurance improved to 100k cycles | Requires level-shifting for 5 V peripherals; unsuitable for legacy 5 V-only systems without redesign | Choose only if migrating to 3.3 V infrastructure and extended flash write endurance is critical |
Compared with AT89C51ED2-RL24PU and P89V51RD2FA,512, the P89CV51RD2FA,512 uniquely delivers SPI, PCA, and 1 kB RAM in a 5 V, PLCC44-compatible package-making it the sole option for retrofitting legacy 8051 designs requiring enhanced peripherals without voltage or layout changes.
Availability
P89CV51RD2FA,512 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 drop-in 8051 compatibility.
Supply support for P89CV51RD2FA,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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The P89CV51RD2FA,512 belongs to NXP's legacy 80C51 microcontroller family, designed specifically to extend the life of proven 8051-based architectures with modern enhancements like ISP/IAP, SPI, and expanded memory-targeting cost-sensitive, reliability-critical embedded systems.
FAQ
What is the maximum operating frequency of the P89CV51RD2FA,512?
The P89CV51RD2FA,512 supports up to 40 MHz in 12-clock mode and 20 MHz in 6-clock mode. The actual maximum frequency depends on supply voltage stability and ambient temperature; operation at 40 MHz requires clean 5 V ±5 % supply and ≤85 °C case temperature. All timing parameters in the datasheet are validated across this full range.
Does the P89CV51RD2FA,512 support in-application programming (IAP)?
Yes, the P89CV51RD2FA,512 fully supports IAP using 128-B page-erase operations. User firmware can invoke LOW-state routines to reprogram flash pages without halting execution-enabling runtime parameter storage, firmware patching, and secure bootloader implementation directly within the P89CV51RD2FA,512 application space.
Is the P89CV51RD2FA,512 pin-compatible with the P89C51RD2FA?
Yes, the P89CV51RD2FA,512 is explicitly designed as a drop-in replacement for the P89C51RD2FA. It shares identical PLCC44 pinout, electrical characteristics, and instruction set compatibility-requiring no PCB modifications or firmware changes when upgrading from the earlier device.
What package options are available for the P89CV51RD2FA,512?
The P89CV51RD2FA,512 is offered exclusively in the PLCC44 package (SOT187-2), a 44-pin plastic leaded chip carrier with J-leads and 1.27 mm pitch. Unlike the P89CV51RD2FBC variant, this part does not ship in TQFP44-it is strictly PLCC44 for legacy board compatibility and socket-based prototyping.
How does the dual data pointer feature improve performance in the P89CV51RD2FA,512?
The P89CV51RD2FA,512 implements two independent 16-bit data pointers (DPTR0 and DPTR1), selected via the DPS bit in AUXR1. This eliminates software-managed pointer swapping overhead, accelerating memory-to-memory moves, table lookups, and DMA-style transfers-particularly beneficial in communication protocol stacks and real-time data buffering where latency must be minimized.
P89CV51RD2FA,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:
- 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:
P89CV51RD2FA,512 FAQ
1.How can I place an order for P89CV51RD2FA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89CV51RD2FA,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 P89CV51RD2FA,512 reliable?
The price and inventory of P89CV51RD2FA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89CV51RD2FA,512 is usually 5 days.
3.What payment methods are accepted for P89CV51RD2FA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89CV51RD2FA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89CV51RD2FA,512?
P89CV51RD2FA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89CV51RD2FA,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 P89CV51RD2FA,512?
For technical support, including P89CV51RD2FA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89CV51RD2FA,512 requirements.
6.How does Aetrix verify that P89CV51RD2FA,512 is sourced from the original manufacturer or authorized distributors?
All P89CV51RD2FA,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 P89CV51RD2FA,512 meets industry standards.
7.What is the process for return or replacement of P89CV51RD2FA,512?
All P89CV51RD2FA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P89CV51RD2FA,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 P89CV51RD2FA,512 part is unused and in its original packaging.
Return procedure for P89CV51RD2FA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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