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NXP Semiconductors P89LV51RC2FA,512
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- Part No.:
- P89LV51RC2FA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89LV51RC2FA,512.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
P89LV51RC2FA,512 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 32 kB on-chip flash program memory, 1024 B RAM, and 3 V operation up to 33 MHz. It supports X2 mode (6-clock per machine cycle) for doubled throughput or halved EMI, ISP/IAP programming, and features SPI, enhanced UART, PCA with PWM/capture/compare, and four 8-bit I/O ports with three 16 mA high-current pins - used in industrial control modules requiring field firmware updates and low-EMI timing.
For engineers reviewing the P89LV51RC2FA,512 datasheet, P89LV51RC2FA,512 pinout, P89LV51RC2FA,512 application, or P89LV51RC2FA,512 equivalent, key selection criteria include flash size (32 kB), −40 °C to +85 °C temperature grade, TQFP44 package, X2 mode configurability, and integrated PCA for motor control timing.
Technical Context
The P89LV51RC2FA,512 implements a standard 80C51 CPU core with dual clock modes: default 12-clock and selectable 6-clock (X2) via software or ISP, enabling performance doubling or EMI reduction. Its memory architecture includes two flash blocks - user code block (32 kB) and boot/IAP block - with bank selection controlled by SWR and BSEL bits in FCF register.
It integrates a programmable counter array (PCA) with five capture/compare modules (CEX0–CEX4), supporting PWM generation and input capture on Port 1 pins. The device also provides three 16-bit timers/counters, a watchdog timer, brownout detection at 2.35 V, and low-power idle/power-down modes with external interrupt wake-up capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 CPU with X2 mode support (6-clock or 12-clock per machine cycle) |
| Flash Memory | 32 kB user code flash with ISP and IAP capability for in-field reprogramming |
| RAM | 1024 B on-chip data RAM, including 768 B expanded RAM accessible via MOVX |
| Operating Voltage | 3 V supply, functional from 0 MHz to 33 MHz clock frequency |
| Temperature Range | −40 °C to +85 °C industrial-grade operation |
| I/O Capability | Four 8-bit bidirectional ports; Port 1 pins P1.5–P1.7 drive 16 mA each |
| Peripherals | SPI interface, enhanced UART, PCA with five CEX channels, three 16-bit timers, WDT, brownout detection |
Pinout & Package
Package: TQFP44 (plastic thin quad flat package; 44 leads; body 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 use |
| P1.0/T2 | Port 1 bit 0 / Timer2 external count input | General I/O or Timer2 clock source/capture input; supports high-current drive (16 mA) only on P1.5–P1.7 |
| P1.5/MOSI/CEX2 | Port 1 bit 5 / SPI master output / PCA module 2 I/O | Shared function pin: SPI data out, PCA capture/compare channel 2; configurable via SFRs |
| P2.0–P2.7 | Port 2 bidirectional I/O / A8–A15 | High-order address bus during external memory access; internal pull-ups enable direct I/O use |
| P3.0/RXD & P3.1/TXD | Serial port input/output | Full-duplex UART interface; supports enhanced baud rate modes via SMOD0/SMOD1 in PCON |
| RST | Reset input | Active-HIGH reset; two-machine-cycle pulse required; enables external host mode when combined with PSEN transition |
| EA | External Access Enable | Strap to VDD for internal flash execution; to VSS for external program memory fetch; tolerates 12 V |
| ALE/PROG | Address Latch Enable / Programming pulse | Latches P0 address during external memory access; serves as PROG signal for flash programming; disabled in low-EMI mode |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Selection | Software- or ISP-configurable 6-clock-per-cycle operation doubles instruction throughput or halves clock frequency to reduce EMI |
| In-System Programming (ISP) | Enables firmware update in end-product under software control via UART without removing the device |
| In-Application Programming (IAP) | Allows flash reconfiguration while application runs - critical for dynamic parameter storage or bootloader updates |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) on Port 1 support PWM, input capture, and software timers |
| Brownout Detection | Hardware reset triggered at 2.35 V supply threshold; optional interrupt at 004BH with EBO bit enable |
| Low-Power Modes | Idle mode halts CPU but preserves RAM/peripherals; power-down mode stops oscillator and reduces current to µA level with external interrupt wake-up |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation using PWM output and encoder feedback. IC Role / Device Role / Timing Role: MCU executes PID algorithm, generates precise PWM via PCA CEX channels, and reads quadrature encoder signals through INT0/INT1 and T0/T1. Use Value: X2 mode enables faster loop execution at same clock; 16 mA Port 1 pins directly drive optocoupler inputs; IAP allows field calibration updates without hardware change. | Use Scenario: Three-phase electricity meter with real-time tariff calculation, tamper detection, and RS-485 communication. IC Role / Device Role / Timing Role: Manages metrology ADC interface, computes kWh/kVAR, handles secure firmware updates over RS-485 via UART, and logs events to flash. Use Value: 32 kB flash stores multiple tariff tables and encryption keys; brownout detection prevents corrupted writes during grid sags; −40 °C to +85 °C rating ensures outdoor cabinet reliability. |
| Embedded HVAC Controller | Factory Automation I/O Module |
Use Scenario: Standalone HVAC unit controlling compressors, fans, valves, and ambient sensors with Modbus RTU communication. IC Role / Device Role / Timing Role: Reads analog/digital sensors, drives relays via Port 1 high-current pins, manages scheduling logic, and communicates via enhanced UART with Modbus framing. Use Value: SPI interfaces with external EEPROM for configuration storage; PCA modules generate synchronized fan PWM; low-EMI X2 mode meets Class B EMC requirements. | Use Scenario: DIN-rail mounted digital I/O expansion module with 16-channel isolated inputs and 8-channel relay outputs. IC Role / Device Role / Timing Role: Aggregates status from opto-isolated inputs, controls solid-state relays, buffers data via UART to PLC master, and performs watchdog supervision. Use Value: Four 8-bit ports provide native GPIO mapping; 1024 B RAM buffers burst I/O data; ISP enables remote firmware patching during plant maintenance windows. |
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-IM | 50 MHz max, 64 kB flash, 1280 B RAM, built-in USB interface; no X2 mode; different SFR map and PCA implementation | Targets USB-connected embedded devices; lacks low-EMI X2 option and 16 mA I/O drive on P1 | Select when USB host/device capability is required and higher clock speed justifies layout change |
| STC89C52RC | 8051-compatible, 8 kB flash, 512 B RAM, 3 V–5.5 V operation; no ISP/IAP; no PCA; lower EMI features | Cost-sensitive consumer products with basic timing/control; no field update requirement | Select for simple, low-cost control where flash size, IAP, and industrial temp range are not needed |
Compared with AT89C51ED2-IM and STC89C52RC, the P89LV51RC2FA,512 uniquely balances 32 kB ISP/IAP flash, X2-mode EMI reduction, 16 mA I/O drive, and −40 °C to +85 °C operation - making it optimal for upgradable industrial controllers where reliability and field serviceability are mandatory.
Availability
P89LV51RC2FA,512 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, embedded HVAC systems, and factory automation I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P89LV51RC2FA,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 company focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The P89LV51RC2FA,512 belongs to NXP's legacy 80C51-based microcontroller family, designed specifically for cost-effective, upgradeable industrial control systems requiring robust flash programming, low-EMI operation, and extended temperature resilience.
FAQ
What is the maximum operating frequency of the P89LV51RC2FA,512?
The P89LV51RC2FA,512 operates up to 33 MHz at 3 V supply. In X2 mode, it achieves twice the instruction throughput of conventional 80C51 at the same crystal frequency - e.g., a 16.5 MHz crystal delivers 33 MHz-equivalent performance. Frequency specification is validated across the full −40 °C to +85 °C industrial temperature range.
Does the P89LV51RC2FA,512 support in-application programming (IAP)?
Yes, the P89LV51RC2FA,512 supports IAP, allowing its 32 kB flash memory to be reconfigured while the application is running. This is implemented via dedicated IAP routines stored in a separate flash block and accessed by setting SWR and BSEL bits in the FCF register. IAP enables runtime firmware patching, parameter storage, and bootloader updates without halting system operation.
What package type is used for the P89LV51RC2FA,512?
The P89LV51RC2FA,512 uses the TQFP44 package (SOT376-1): plastic thin quad flat package with 44 leads, 10 × 10 × 1.0 mm body size. Pin assignments match the generic P89LV51RB2/RC2/RD2 family layout, with identical TQFP44 pinout across all variants - confirmed in Figures 3 and Table 3 of the NXP datasheet Rev. 05.
How does the X2 mode reduce electromagnetic interference (EMI) in the P89LV51RC2FA,512?
The P89LV51RC2FA,512 reduces EMI in X2 mode by permitting halving of the crystal frequency while maintaining the same instruction throughput - e.g., 16.5 MHz crystal instead of 33 MHz. Since EMI radiates strongly at fundamental and harmonic frequencies, lowering the clock source directly suppresses harmonics. Additionally, ALE emission drops to 1/3 of crystal frequency in X2 mode, further reducing noise bandwidth.
Which pins on the P89LV51RC2FA,512 support 16 mA high-current drive?
Only P1.5, P1.6, and P1.7 on the P89LV51RC2FA,512 support 16 mA high-current drive - explicitly stated in Section 2 ("Features") and Table 3 ("Pin description"). These pins double as MOSI/MISO/SPICLK and CEX2/CEX3/CEX4. Other Port 1 pins (P1.0–P1.4) operate at standard 10 mA sink/source and must not be assumed capable of 16 mA drive.
P89LV51RC2FA,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 89LV
- Packaging:
- Tube
- 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:
P89LV51RC2FA,512 FAQ
1.How can I place an order for P89LV51RC2FA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89LV51RC2FA,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 P89LV51RC2FA,512 reliable?
The price and inventory of P89LV51RC2FA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89LV51RC2FA,512 is usually 5 days.
3.What payment methods are accepted for P89LV51RC2FA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89LV51RC2FA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89LV51RC2FA,512?
P89LV51RC2FA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89LV51RC2FA,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 P89LV51RC2FA,512?
For technical support, including P89LV51RC2FA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89LV51RC2FA,512 requirements.
6.How does Aetrix verify that P89LV51RC2FA,512 is sourced from the original manufacturer or authorized distributors?
All P89LV51RC2FA,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 P89LV51RC2FA,512 meets industry standards.
7.What is the process for return or replacement of P89LV51RC2FA,512?
All P89LV51RC2FA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P89LV51RC2FA,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 P89LV51RC2FA,512 part is unused and in its original packaging.
Return procedure for P89LV51RC2FA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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