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NXP Semiconductors P89V51RD2FA,512
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- Part No.:
- P89V51RD2FA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89V51RD2FA,512.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,511
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Product details
Overview
P89V51RD2FA,512 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 64 kB on-chip flash program memory, 1 kB data RAM, 5 V operation up to 40 MHz, X2 mode (6-clock/machine cycle), and integrated ISP/IAP capability. It serves as a main system controller in industrial control panels requiring field firmware updates and low-EMI operation.
For engineers reviewing the P89V51RD2FA,512 datasheet, P89V51RD2FA,512 pinout, P89V51RD2FA,512 application, or P89V51RD2FA,512 equivalent, key selection criteria include flash size (64 kB), PLCC44 package compatibility, X2 mode throughput doubling, brownout detection at 2.35 V, and PCA-based PWM generation for motor control.
Technical Context
The P89V51RD2FA,512 implements a standard 80C51 CPU core with dual clock modes: default 12-clock and selectable 6-clock (X2) via software or ISP, enabling either doubled performance at same frequency or halved clock for EMI reduction. Its memory architecture includes two flash blocks - Block 0 (64 kB user code) and Block 1 (IAP/ISP routines) - with bank selection controlled by SWR/BSEL bits in FCF register.
It integrates a programmable counter array (PCA) with five capture/compare modules (CEX0–CEX4), supporting PWM, input capture, and high-resolution timing. Peripheral set includes SPI, enhanced UART, three 16-bit timers/counters, watchdog timer, and four 8-bit I/O ports with three high-current (16 mA) pins on Port 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 80C51 CPU - fully compatible with legacy 8051 toolchains and instruction set. |
| Flash Memory | 64 kB - supports full application firmware plus bootloader space; enables complex control logic without external memory. |
| Data RAM | 1024 B - sufficient for real-time variables, stack, and peripheral buffers in embedded control tasks. |
| Max Clock Frequency | 40 MHz - delivers up to 6.67 MIPS in X2 mode (6 clocks/machine cycle), suitable for responsive sensor processing. |
| Operating Voltage | 5 V ±10% - compatible with legacy industrial power rails and TTL-level peripherals. |
| Temperature Range | −40 °C to +85 °C - qualified for extended industrial environments including factory automation and HVAC systems. |
| Brownout Detection | 2.35 V threshold - triggers reset before supply collapse corrupts flash or RAM, ensuring deterministic recovery. |
Pinout & Package
Package: PLCC44 (SOT187-2), plastic leaded chip carrier with 44 leads, body size 16.6 × 16.6 × 4.0 mm, suitable for through-hole mounting and rework-friendly prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0/AD0 – P0.7/AD7 | Port 0 bidirectional I/O / multiplexed address-data bus | Open-drain outputs require external pull-ups; used for external memory interfacing or general-purpose I/O with address/data sharing. |
| P1.0/T2 – P1.7/SPICLK/CEX4 | Port 1 with alternate functions | Supports Timer2 I/O (P1.0/T2), PCA channels CEX0–CEX4, SPI signals (MOSI/MISO/SPICLK), and slave select (SS); three pins drive 16 mA for direct LED/relay control. |
| P2.0/A8 – P2.7/A15 | Port 2 bidirectional I/O / high-order address bus | Provides upper address bits A8–A15 during external memory access; internal pull-ups enable reliable bus hold during idle cycles. |
| P3.0/RXD – P3.7/RD | Port 3 with serial/peripheral control functions | Dedicated UART (RXD/TXD), external interrupts (INT0/INT1), timer inputs (T0/T1), and memory control (WR/RD); essential for host communication and real-time event handling. |
| XTAL1 / XTAL2 | Crystal oscillator inputs | Supports quartz crystals or resonators from 0–40 MHz; XTAL1 accepts external clock source for synchronous system timing. |
| EA / ALE/PROG / PSEN | Memory interface control | EA selects internal/external code execution; ALE latches address low-byte for external memory; PSEN enables external program fetch - critical for hybrid memory designs. |
| RST / VDD / VSS | Reset and power supply | RST requires ≥2 machine-cycle high pulse; VDD/VSS provide 5 V supply with decoupling recommended per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Selection | Software-configurable 6-clock/machine cycle operation doubles instruction throughput at same crystal frequency or halves clock for EMI reduction. |
| In-System Programming (ISP) | Enables firmware updates via UART without removing device from PCB - reduces service downtime in deployed equipment. |
| In-Application Programming (IAP) | Allows flash reconfiguration while application runs - supports dynamic parameter storage, OTA-like updates, and self-modifying code segments. |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) support simultaneous PWM generation, pulse-width measurement, and time-stamped event logging. |
| Low-EMI Mode (ALE Inhibit) | Disabling ALE output eliminates high-frequency switching noise on address latch line - improves EMC compliance in noise-sensitive instrumentation. |
| Brownout Detection | Hardware reset triggered at 2.35 V ensures safe shutdown before supply collapse corrupts flash contents or causes undefined MCU behavior. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed regulation of 3-phase AC motors using feedback from Hall-effect sensors and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Main controller executing PID algorithm, generating 16-bit PWM via PCA modules, and managing UART-based HMI communication. Use Value: 64 kB flash stores full motor control firmware with safety checks; X2 mode ensures sub-100 µs loop response at 40 MHz crystal. | Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ data, then transmitting via RS-485 to central gateway. IC Role / Device Role / Timing Role: System-on-chip managing ADC sampling, data preprocessing, low-power sleep/wake cycles, and robust UART framing. Use Value: 1 kB RAM accommodates sensor buffers and protocol stacks; brownout detection prevents corrupted EEPROM writes during voltage sag. |
| Legacy Equipment Retrofit | PLC I/O Module |
Use Scenario: Replacing obsolete 8051-based controllers in aging CNC machines while retaining existing 5 V logic and DIP-style footprint compatibility. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical instruction timing, pin-compatible I/O mapping, and backward-compatible memory interface. Use Value: PLCC44 package fits existing sockets; 5 V tolerance and TTL/CMOS logic levels ensure seamless integration without level-shifter redesign. | Use Scenario: Digital input/output expansion module for modular PLC systems, monitoring 16 discrete inputs and driving 8 relay outputs with status reporting. IC Role / Device Role / Timing Role: Dedicated I/O processor handling debounce, edge detection, and watchdog-monitored output sequencing. Use Value: Four 8-bit ports plus PCA-based pulse timing enable concurrent signal conditioning; ISP allows field calibration updates without hardware change. |
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 kB RAM, but no X2 mode; max 33 MHz; lacks PCA; uses different ISP protocol. | Lower interrupt latency but no hardware PWM flexibility; less suitable for motor control requiring precise timing. | Select when cost sensitivity outweighs need for X2 throughput or PCA-based waveform generation. |
| STC89C52RC-PDIP40 | 8 kB flash, 512 B RAM, 5 V, 0–80 MHz; enhanced 8051 core with single-cycle instructions; no ISP/IAP; DIP40 only. | Higher base clock but smaller memory; limited to simple control tasks; no field update capability. | Select for basic sequential logic where flash size and firmware updateability are not required. |
Compared with AT89C51ED2-RL24 and STC89C52RC-PDIP40, the P89V51RD2FA,512 uniquely combines 64 kB flash, X2 mode, full ISP/IAP, and five-channel PCA - making it optimal for industrial upgrades demanding both legacy compatibility and modern firmware agility.
Availability
P89V51RD2FA,512 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, legacy equipment retrofit, and PLC I/O modules requiring stable component supply across long production lifecycles.
Supply support for P89V51RD2FA,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, with deep heritage in 80C51 architecture development.
The P89V51RD2FA,512 belongs to NXP's legacy 80C51 microcontroller family designed specifically for industrial control systems requiring high reliability, in-field programmability, and long-term supply stability.
FAQ
What is the maximum operating frequency of the P89V51RD2FA,512?
The P89V51RD2FA,512 supports a maximum crystal frequency of 40 MHz. In X2 mode (6 clocks per machine cycle), this yields an effective instruction rate of approximately 6.67 million instructions per second (MIPS). The device remains fully functional at lower frequencies down to DC, supporting ultra-low-power idle modes without clock dependency.
Does the P89V51RD2FA,512 support in-system programming (ISP)?
Yes, the P89V51RD2FA,512 supports ISP via its UART interface using standard autobaud detection. Firmware can be updated in-circuit without removing the device from the PCB. The process requires no external high-voltage programming supply - only a 5 V rail and serial connection - and is fully documented in the NXP P89V51RB2_RC2_RD2_5 datasheet.
What package type is used for the P89V51RD2FA,512?
The P89V51RD2FA,512 uses a PLCC44 package (SOT187-2): a 44-lead plastic leaded chip carrier with 16.6 × 16.6 × 4.0 mm body dimensions. It is pin-compatible with other members of the P89V51RB2/RC2/RD2 family in PLCC44, enabling design reuse across memory variants.
How does the X2 mode affect power consumption and EMI in the P89V51RD2FA,512?
In X2 mode, the P89V51RD2FA,512 executes twice as many instructions per clock cycle, allowing equivalent performance at half the crystal frequency - reducing both dynamic power draw and radiated EMI. ALE frequency also drops to 1/3 of crystal frequency in X2 mode, further lowering high-frequency noise emissions critical for CE/FCC compliance.
Can the P89V51RD2FA,512 execute code from external memory?
Yes, the P89V51RD2FA,512 supports external program memory access when the EA pin is grounded. Its 16-bit address bus (via P0 and P2) and control signals (PSEN, RD, WR) enable connection to external EPROM or Flash. However, internal 64 kB flash is typically used for primary code storage, with external memory reserved for data logging or overlay firmware sections.
P89V51RD2FA,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 89V
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 40MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, 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:
P89V51RD2FA,512 FAQ
1.How can I place an order for P89V51RD2FA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89V51RD2FA,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 P89V51RD2FA,512 reliable?
The price and inventory of P89V51RD2FA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89V51RD2FA,512 is usually 5 days.
3.What payment methods are accepted for P89V51RD2FA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89V51RD2FA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89V51RD2FA,512?
P89V51RD2FA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89V51RD2FA,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 P89V51RD2FA,512?
For technical support, including P89V51RD2FA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89V51RD2FA,512 requirements.
6.How does Aetrix verify that P89V51RD2FA,512 is sourced from the original manufacturer or authorized distributors?
All P89V51RD2FA,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 P89V51RD2FA,512 meets industry standards.
7.What is the process for return or replacement of P89V51RD2FA,512?
All P89V51RD2FA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P89V51RD2FA,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 P89V51RD2FA,512 part is unused and in its original packaging.
Return procedure for P89V51RD2FA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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