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NXP Semiconductors P89LV51RC2FBC,557
- Part No.:
- P89LV51RC2FBC,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-TQFP
- Datasheet:
-
P89LV51RC2FBC,557.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,341
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Product details
Overview
P89LV51RC2FBC from NXP Semiconductors is an 8-bit 80C51 microcontroller with 32 kB on-chip flash program memory, 1 kB data RAM, 3 V operation (0–33 MHz), X2 mode for doubled throughput or halved EMI, and TQFP44 package. It integrates SPI, enhanced UART, PCA with PWM/capture/compare, three 16-bit timers, and programmable watchdog - deployed in industrial control panels requiring field-upgradable firmware and low-EMI timing.
For engineers reviewing the P89LV51RC2FBC datasheet, P89LV51RC2FBC pinout, P89LV51RC2FBC application, or P89LV51RC2FBC equivalent, key selection criteria include its −40 °C to +85 °C temperature rating, 6-clock/12-clock mode software selectability, ISP/IAP reprogrammability, and TQFP44 footprint compatibility with legacy 80C51 designs.
Technical Context
The P89LV51RC2FBC implements a standard 80C51 CPU core with dual clock modes: default 12-clock-per-machine-cycle and selectable 6-clock mode via SFR configuration or ISP command. Its memory architecture separates 32 kB flash (Block 0) from 8 kB ISP/IAP boot code (Block 1), with bank selection controlled by SWR/BSEL bits in FCF register.
Peripheral integration includes a 5-channel Programmable Counter Array (PCA) supporting PWM generation and edge-triggered capture on dedicated Port 1 pins (CEX0–CEX4), plus SPI with master/slave capability, enhanced UART with framing error detection, and brownout detection at 2.35 V with interrupt or reset response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 8-bit CPU with instruction set compatibility and same register map as standard 8051 |
| Flash Memory | 32 kB user code flash with sector erase (128 B/sector), ISP via UART/SPI, IAP during runtime |
| RAM | 1024 B on-chip data RAM: 128 B direct + 128 B indirect + 768 B expanded RAM via MOVX |
| Clock Modes | Software-selectable 6-clock (X2) or 12-clock per machine cycle; ALE frequency = 1/3 or 1/6 crystal frequency respectively |
| Operating Voltage & Temp | 3.0 V ± 10 % supply; −40 °C to +85 °C industrial temperature range |
| Timers & Counters | Three 16-bit timers/counters (T0/T1/T2); T2 supports capture/compare, baud rate generation, and external clock input |
| Interrupt System | Eight interrupt sources (INT0/INT1/T0/T1/T2/RXD/TX/BO) with four priority levels and individual enable bits |
Pinout & Package
TQFP44 package: plastic thin quad flat package, 44 leads, body size 10 × 10 × 1.0 mm (SOT376-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 bidirectional I/O / AD0–AD7 | Open-drain port; multiplexed low-order address/data bus for external memory access; requires external pull-ups for general-purpose I/O |
| P1.0/T2, P1.1/T2EX, P1.2/ECI, P1.3/CEX0–P1.7/SPICLK | Port 1 with PCA/SPI functions | High-current (16 mA) outputs on P1.5–P1.7; CEX0–CEX4 support PCA capture/compare; SPICLK/MOSI/MISO enable synchronous serial communication |
| P2.0/A8–P2.7/A15 | Port 2 bidirectional I/O / A8–A15 | Provides high-order address bits during external memory access; internal pull-ups enable use as general-purpose I/O |
| P3.0/RXD–P3.7/RD | Port 3 with serial/external control | Dedicated UART (RXD/TXD), external interrupts (INT0/INT1), timer inputs (T0/T1), and external memory strobes (WR/RD) |
| RST, EA, ALE/PROG, PSEN, XTAL1, XTAL2, VDD, VSS | Control & power signals | RST enables hardware reset; EA selects internal/external code execution; ALE latches address byte; PSEN enables external program fetch; XTAL1/XTAL2 drive oscillator |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Clock Flexibility | Runtime switch between 6-clock and 12-clock machine cycles via SFR or ISP - enables either 2× performance at same frequency or 50 % lower EMI at same throughput |
| In-System Programming (ISP) | UART- or SPI-based firmware update without removing device from PCB; supports autobaud detection and host-controlled flash erase/write |
| In-Application Programming (IAP) | Reconfigure flash memory while application executes - allows dynamic firmware patching, parameter storage, or bootloader updates without halting main code |
| Programmable Counter Array (PCA) | Five independent modules (CEX0–CEX4) with PWM output, edge-capture, software timer, and high-speed pulse-width modulation up to 16-bit resolution |
| Brownout Detection | Hardware reset or interrupt triggered at 2.35 V supply threshold; prevents erratic operation during undervoltage conditions without external supervisor IC |
| Low-EMI Operation | ALE inhibit mode and X2 mode reduce radiated emissions; TTL/CMOS-compatible I/O simplifies interface with legacy logic and sensors |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
|
Use Scenario: Embedded controller in single-phase electricity meters with tariff switching, tamper detection, and RS-485 communication. IC Role / Device Role / Timing Role: Main MCU executing metering algorithms, managing real-time clock, handling SPI-connected ADCs, and driving LCD via Port 0/2. Use Value: 32 kB flash stores multiple tariff tables and firmware updates; IAP enables remote calibration updates; −40 °C to +85 °C rating ensures outdoor cabinet reliability. |
Use Scenario: Local intelligence node in HVAC control systems regulating fan speed, valve position, and temperature feedback loops. IC Role / Device Role / Timing Role: Real-time actuator coordinator using PCA-generated PWM for motor drives and Timer 2 for precise 1 ms system tick. Use Value: Five PCA channels independently control 5 actuators; X2 mode delivers deterministic 10 µs interrupt latency at 22.1184 MHz crystal; TQFP44 footprint fits space-constrained PCBs. |
| Factory Automation I/O Module | Legacy Equipment Retrofit Controller |
|
Use Scenario: DIN-rail mounted digital I/O expansion unit interfacing PLCs via Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol handler and GPIO manager - UART handles Modbus framing, Port 1 drives opto-isolated inputs/outputs, PCA times pulse-width diagnostics. Use Value: Enhanced UART with framing error detection improves Modbus CRC robustness; 16 mA Port 1 pins directly drive LEDs and small relays; ISP allows field firmware upgrades without hardware change. |
Use Scenario: Drop-in replacement for obsolete 8051-based controllers in medical infusion pumps requiring safety-certified firmware updates. IC Role / Device Role / Timing Role: Pin-compatible upgrade path preserving existing PCB layout while adding flash security, brownout reset, and in-field reprogramming. Use Value: TQFP44 package matches legacy PLCC44 pad pattern with adapter; identical SFR map ensures zero software porting effort; IAP supports FDA-mandated post-deployment patches. |
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-RL24 | 51-compatible MCU with 64 kB flash, no X2 mode, 5 V operation only, PLCC44/TQFP44 packages | Lacks 3 V operation and X2 mode; requires level-shifting for 3 V peripherals; higher power consumption limits battery use | Select when legacy 5 V design must retain AT89C51 software and 64 kB flash is required - not suitable for low-EMI or wide-temp industrial use |
| STC89C52RC-PDIP40 | Enhanced 8051 with 8 kB flash, 5 V, PDIP40 package, built-in ISP but no IAP or PCA | No PCA, no X2 mode, no brownout detection; limited peripheral set restricts motor control or precision timing roles | Choose for cost-sensitive consumer electronics where 8 kB flash suffices and TQFP44 footprint is not required |
Compared with AT89C51RD2-RL24 and STC89C52RC-PDIP40, the P89LV51RC2FBC uniquely combines 32 kB flash, X2 mode, IAP, PCA, and −40 °C to +85 °C operation in TQFP44 - making it optimal for industrial retrofit and EMI-sensitive embedded control.
Availability
P89LV51RC2FBC is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, factory automation I/O modules, and legacy equipment retrofit requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P89LV51RC2FBC 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 and flash microcontroller innovation.
The P89LV51RC2FBC belongs to NXP's legacy 80C51 flash MCU family designed specifically for industrial control, instrumentation, and equipment modernization - emphasizing field-upgradability, EMI resilience, and drop-in compatibility with classic 8051 designs.
FAQ
What is the maximum operating frequency of the P89LV51RC2FBC?
The P89LV51RC2FBC operates up to 33 MHz at 3.0 V. In X2 mode, it achieves twice the instruction throughput of standard 80C51 at the same crystal frequency - e.g., a 22.1184 MHz crystal yields effective 44.2368 MHz instruction rate. The datasheet confirms 0–33 MHz operation with no derating required across its −40 °C to +85 °C range.
Does the P89LV51RC2FBC support in-application programming (IAP)?
Yes, the P89LV51RC2FBC supports full IAP functionality: flash memory can be erased and rewritten while the main application runs. This is implemented via dedicated ISP/IAP routines in Block 1 flash, accessed by setting SWR/BSEL bits. IAP enables dynamic firmware updates, parameter storage, and bootloader self-modification without halting real-time tasks.
What is the purpose of the X2 mode in the P89LV51RC2FBC?
The X2 mode reduces the clock cycles per machine cycle from 12 to 6, doubling instruction throughput at the same crystal frequency - or allowing halving the crystal frequency to achieve identical performance with dramatically reduced EMI. It is selected via software (AUXR register) or ISP command, and affects ALE frequency (1/3 vs. 1/6 crystal frequency).
Which package does the P89LV51RC2FBC use, and what are its dimensions?
The P89LV51RC2FBC uses the TQFP44 package (SOT376-1): plastic thin quad flat package with 44 leads, body size 10.0 mm × 10.0 mm × 1.0 mm, and 0.8 mm lead pitch. Pinout matches Figure 3 in the NXP datasheet Rev. 05, and is compatible with standard TQFP44 PCB footprints used for industrial microcontrollers.
How does the P89LV51RC2FBC handle brownout conditions?
The P89LV51RC2FBC features a built-in brownout detector with 2.35 V threshold. When VDD drops below this level, it triggers either a hardware reset (default) or a brownout interrupt (if EBO bit is set). The reset clears BSEL but preserves SWR state, ensuring consistent flash banking behavior after recovery - eliminating need for external supervisor ICs in ruggedized designs.
P89LV51RC2FBC,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-TQFP
- Series:
- 89LV
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 33MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P89LV51RC2FBC,557 FAQ
1.How can I place an order for P89LV51RC2FBC,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89LV51RC2FBC,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 P89LV51RC2FBC,557 reliable?
The price and inventory of P89LV51RC2FBC,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89LV51RC2FBC,557 is usually 5 days.
3.What payment methods are accepted for P89LV51RC2FBC,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89LV51RC2FBC,557 transactions.
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4.How is shipping managed for P89LV51RC2FBC,557?
P89LV51RC2FBC,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89LV51RC2FBC,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 P89LV51RC2FBC,557?
For technical support, including P89LV51RC2FBC,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89LV51RC2FBC,557 requirements.
6.How does Aetrix verify that P89LV51RC2FBC,557 is sourced from the original manufacturer or authorized distributors?
All P89LV51RC2FBC,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 P89LV51RC2FBC,557 meets industry standards.
7.What is the process for return or replacement of P89LV51RC2FBC,557?
All P89LV51RC2FBC,557 units undergo pre-shipment inspection (PSI). If there is an issue with P89LV51RC2FBC,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 P89LV51RC2FBC,557 part is unused and in its original packaging.
Return procedure for P89LV51RC2FBC,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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