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NXP Semiconductors P89V51RB2FA,529
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- Part No.:
- P89V51RB2FA,529
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89V51RB2FA,529.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,171
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Product details
Overview
P89V51RB2FA,529 from NXP Semiconductors is a 8-bit 80C51 microcontroller with 16 kB flash program memory, 1024 B on-chip RAM, and PLCC44 package. It operates at 5 V over 0–40 MHz, supports X2 mode (6-clock/machine cycle) for doubled throughput or halved EMI, and integrates ISP/IAP, SPI, enhanced UART, PCA with PWM/capture/compare, and three 16-bit timers - used in industrial control modules requiring field-upgradable firmware and deterministic real-time I/O.
For engineers reviewing the P89V51RB2FA,529 datasheet, P89V51RB2FA,529 pinout, P89V51RB2FA,529 application, or P89V51RB2FA,529 equivalent, key selection criteria include flash size (16 kB), X2 mode configurability, PLCC44 thermal/mechanical fit, brownout detection (2.35 V), and dual reset sources (power-on/watchdog) for robust embedded deployment.
Technical Context
The P89V51RB2FA,529 implements an enhanced 80C51 CPU core with software-selectable 12-clock or 6-clock machine cycle timing, enabling performance scaling without clock frequency change. Its memory architecture separates 16 kB flash (Block 0) and boot/IAP routines (Block 1), with bank selection controlled by SWR/BSEL bits in FCF register.
It features a programmable counter array (PCA) with five capture/compare modules mapped to Port 1 pins (CEX0–CEX4), supporting PWM generation and input capture with independent edge-triggered logic. The enhanced UART includes SMOD0/SMOD1 baud rate control, while SPI supports master/slave operation via dedicated MOSI/MISO/SPICLK/SS pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 80C51-compatible CPU with X2 mode (6 clocks/machine cycle) |
| Flash Memory | 16 kB user code space with ISP and IAP support - enables in-system firmware updates and runtime reconfiguration |
| RAM | 1024 B on-chip data RAM, including 768 B indirectly addressable expanded RAM |
| Clock Range | 0–40 MHz at 5 V - supports high-speed operation or low-EMI 20 MHz X2-mode execution |
| Operating Voltage | 5 V ±10% - compatible with legacy TTL/CMOS logic and standard industrial power rails |
| Temperature Range | −40 °C to +85 °C - qualified for extended industrial ambient conditions |
| Brownout Detection | 2.35 V threshold with interrupt/reset capability - prevents erratic operation during supply sag |
Pinout & Package
Package: PLCC44 (SOT187-2), 44-pin plastic leaded chip carrier, body size 16.6 × 16.6 × 4.0 mm, suitable for through-hole mounting with thermal relief and mechanical stability in industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.5/MOSI/CEX2 | SPI Master Output / PCA Module 2 I/O | Shared function pin: drives SPI data to slave devices or captures/compares external signals with 16 mA drive capability |
| P3.0/RXD | UART Serial Input | Asynchronous receive input for full-duplex communication; supports enhanced baud rate modes via SMOD bits |
| XTAL1 | Oscillator Input | Connects to crystal or resonator; internal inverting amplifier forms Pierce oscillator with XTAL2 |
| EA | External Access Enable | Strapped to VDD to execute from internal flash; tolerates 12 V for programming verification |
| ALE/PROG | Address Latch Enable / Flash Programming Pulse | Outputs address latch strobe at 1/6 crystal freq (12-clock mode) or 1/3 (X2 mode); doubles as PROG pulse during flash write |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Selection | Software-configurable 6-clock/machine cycle operation - doubles instruction throughput at same clock frequency or halves clock for EMI reduction |
| In-System Programming (ISP) | Serial reprogramming under software control via UART - eliminates need for external programmers in end-product field updates |
| In-Application Programming (IAP) | Runtime flash reconfiguration while application executes - enables dynamic firmware patching and parameter storage in flash |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) with PWM, high-resolution timing, and event counting - replaces discrete timers in motor control and signal measurement |
| Low-EMI Mode | ALE inhibit via AO bit - suppresses ALE output to reduce radiated emissions in noise-sensitive environments |
Applications
| Industrial PLC I/O Module | Smart Energy Meter |
|---|---|
Use Scenario: Standalone digital input/output expansion unit with isolated sensor/actuator interfaces and local logic processing. IC Role / Device Role / Timing Role: Primary 80C51 controller managing 4×8-bit parallel I/O ports, timer-based sampling, and UART-based HMI communication. Use Value: 16 mA high-current Port 1 pins directly drive LEDs/relays; X2 mode ensures deterministic 100 µs I/O response at 20 MHz clock; ISP enables remote firmware upgrades. | Use Scenario: Residential electricity meter with pulse counting, tariff switching, and RS-485 communication to utility network. IC Role / Device Role / Timing Role: Metering controller executing energy calculation algorithms, capturing kWh pulses via T0/T1, and managing secure time-stamped logging. Use Value: Brownout detection (2.35 V) prevents data corruption during grid sags; 16 kB flash stores multiple tariff tables and firmware versions; PCA captures precise pulse edges for accurate watt-hour integration. |
| Embedded HVAC Controller | Legacy Industrial Communication Gateway |
Use Scenario: Fan coil unit controller with temperature sensing, valve actuation, and Modbus RTU interface. IC Role / Device Role / Timing Role: Real-time system controller coordinating analog ADC reads (P0.0–P0.7), PWM fan speed control (PCA CEX outputs), and serial protocol stack. Use Value: Integrated 10-bit ADC inputs (AD0–AD7) eliminate external converters; three 16-bit timers manage multi-channel PWM and watchdog supervision; 5 V tolerance simplifies power design with existing 5 V rails. | Use Scenario: Protocol translator bridging RS-232 field devices to CAN bus backbone in factory automation. IC Role / Device Role / Timing Role: Dual-serial interface coordinator using UART0 for RS-232 and UART1 (enhanced) for CAN controller messaging via external transceiver. Use Value: Second DPTR register accelerates memory-mapped CAN buffer access; IAP allows over-the-air protocol stack updates; PLCC44 package provides reliable socket-mounting for serviceable gateways. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51RD2-RLTUM | 16 kB flash, 1.25 kB RAM, 0–60 MHz, 3 V/5 V tolerant, no X2 mode, different ISP interface (SPI-based) | Lacks X2 mode and PCA; uses SPI ISP instead of UART ISP - requires redesign of programming infrastructure | Select when lower voltage operation or SPI-based production programming is required; not drop-in due to pinout and feature differences |
| P89V51RD2FA,529 | 64 kB flash, same PLCC44 package, identical X2 mode, PCA, and ISP/IAP architecture | Higher flash capacity supports larger protocol stacks or dual-application images - suitable for future-proofing or feature-rich variants | Select when scalable firmware storage is needed without changing board layout or firmware architecture |
Compared with AT89C51RD2-RLTUM, P89V51RB2FA,529 offers deterministic X2 timing and PCA-based PWM critical for real-time control; versus P89V51RD2FA,529, it trades flash capacity for cost and footprint efficiency in resource-constrained designs.
Availability
P89V51RB2FA,529 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, embedded HVAC controllers, and legacy industrial communication gateways requiring stable component supply across long product lifecycles.
Supply support for P89V51RB2FA,529 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The P89V51RB2FA,529 belongs to NXP's legacy 80C51 microcontroller family, designed for cost-sensitive, high-reliability industrial control systems requiring field-upgradable firmware and deterministic real-time peripheral handling.
FAQ
What is the maximum operating frequency of the P89V51RB2FA,529 and how does X2 mode affect timing?
The P89V51RB2FA,529 supports up to 40 MHz crystal frequency. In default 12-clock mode, one machine cycle equals 12 oscillator periods; in X2 mode (enabled via software or ISP), it reduces to six clocks per machine cycle - doubling instruction throughput at the same frequency or allowing 20 MHz operation to achieve 40 MHz-equivalent performance with lower EMI.
Does the P89V51RB2FA,529 support in-application programming (IAP), and what memory regions can be rewritten?
Yes, the P89V51RB2FA,529 supports IAP. It allows runtime reprogramming of its 16 kB flash memory (Block 0) while the application executes - enabling firmware patches, configuration updates, or secure key storage without halting operation. IAP routines reside in Block 1 and are accessed via bank switching controlled by SWR/BSEL bits.
What are the key differences between the PLCC44 (P89V51RB2FA,529) and DIP40 (P89V51RB2FN) package variants?
The P89V51RB2FA,529 uses PLCC44 (SOT187-2) with 44 leads and J-leads for surface-mount or socketed through-hole use; P89V51RB2FN uses DIP40 (SOT129-1) with 40 leads and 600-mil spacing. PLCC44 provides two additional I/O pins (P2.6/A14, P2.7/A15) and supports full 16-bit external addressing, while DIP40 omits A14/A15 and has different pin mapping for P0–P3 ports.
How does the brownout detection circuit behave on the P89V51RB2FA,529, and can it generate an interrupt?
The P89V51RB2FA,529 brownout detector triggers at 2.35 V. By default, it forces a reset; however, enabling the EBO bit (IEA.3) configures it to generate a brownout interrupt at vector 004BH. Software must clear EBO after servicing to prevent spurious resets - and if voltage remains below threshold, clearing EBO causes a clean reset. The POF flag in PCON indicates power-on condition.
Which pins on the P89V51RB2FA,529 support high-current drive, and what is the rated output current?
Port 1 pins P1.5, P1.6, and P1.7 each support 16 mA sink/source current - confirmed in the datasheet pin description table. These pins double as MOSI/MISO/SPICLK and CEX2/CEX3/CEX4, making them suitable for driving LEDs, small relays, or level-shifting circuits without external buffers. Other I/O pins have standard TTL-compatible drive strength.
P89V51RB2FA,529 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:
- 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:
P89V51RB2FA,529 FAQ
1.How can I place an order for P89V51RB2FA,529 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89V51RB2FA,529 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 P89V51RB2FA,529 reliable?
The price and inventory of P89V51RB2FA,529 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89V51RB2FA,529 is usually 5 days.
3.What payment methods are accepted for P89V51RB2FA,529?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89V51RB2FA,529 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89V51RB2FA,529?
P89V51RB2FA,529 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89V51RB2FA,529 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 P89V51RB2FA,529?
For technical support, including P89V51RB2FA,529 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89V51RB2FA,529 requirements.
6.How does Aetrix verify that P89V51RB2FA,529 is sourced from the original manufacturer or authorized distributors?
All P89V51RB2FA,529 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 P89V51RB2FA,529 meets industry standards.
7.What is the process for return or replacement of P89V51RB2FA,529?
All P89V51RB2FA,529 units undergo pre-shipment inspection (PSI). If there is an issue with P89V51RB2FA,529, 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 P89V51RB2FA,529 part is unused and in its original packaging.
Return procedure for P89V51RB2FA,529:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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