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NXP Semiconductors P89LV51RD2FA,512
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- Part No.:
- P89LV51RD2FA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89LV51RD2FA,512.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
P89LV51RD2FA,512 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 64 kB on-chip flash program memory, 1 kB data RAM, and support for 6-clock/X2 mode operation at up to 33 MHz. It features SPI, enhanced UART, PCA with PWM/capture/compare, four 8-bit I/O ports (including three 16 mA high-current P1 pins), and operates from 3 V across −40 °C to +85 °C in PLCC44 package. It enables field firmware updates via ISP/IAP in industrial control and embedded instrumentation.
For engineers reviewing the P89LV51RD2FA,512 datasheet, P89LV51RD2FA,512 pinout, P89LV51RD2FA,512 application, or P89LV51RD2FA,512 equivalent, key selection considerations include its 64 kB flash capacity, X2 mode throughput doubling, PLCC44 packaging, −40 °C to +85 °C temperature rating, and integrated brownout detection with programmable watchdog timer.
Technical Context
The P89LV51RD2FA,512 implements a standard 80C51 CPU core with dual clock modes: default 12-clock-per-machine-cycle and selectable 6-clock mode for doubled instruction throughput at identical crystal frequency. Its memory architecture includes two flash blocks-64 kB user code (Block 0) and dedicated ISP/IAP routines (Block 1)-with bank-selectable overlay controlled by SWR/BSEL bits in FCF register.
It integrates a programmable counter array (PCA) with five capture/compare modules (CEX0–CEX4), supporting PWM generation, input capture, and software timers. Peripheral set includes SPI with master/slave capability, enhanced UART with frame error detection, three 16-bit timers/counters, and four priority-level interrupt system with eight sources-including external INT0/INT1, timer overflows, and serial events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 8-bit CPU with 6-clock/X2 mode option enabling 2× instruction throughput at same clock frequency. |
| Flash Memory | 64 kB on-chip flash with ISP and IAP support-enables in-system reprogramming and runtime firmware updates. |
| Data RAM | 1024 B internal RAM: 128 B direct/indirect, 128 B indirect-only, 768 B expanded RAM accessed via MOVX with EXTRAM=0. |
| Operating Voltage | 3 V supply, supporting 0–33 MHz operation with low-EMI ALE inhibit and brownout detection at 2.35 V. |
| I/O & Peripherals | Four 8-bit bidirectional ports (P0–P3); SPI, enhanced UART, PCA (5 modules), three 16-bit timers, programmable watchdog timer. |
| Temperature Range | −40 °C to +85 °C industrial grade operation-validated for extended thermal environments in embedded systems. |
| Package | PLCC44 (SOT187-2): 44-pin plastic leaded chip carrier with through-hole mounting compatibility and thermal performance suitable for industrial PCBs. |
Pinout & Package
Package: PLCC44 (SOT187-2), 44-lead plastic leaded chip carrier with 1.27 mm pitch, body size 16.5 × 16.5 × 3.5 mm, suitable for socketed or soldered industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0/AD0 – P0.7/AD7 | Port 0 / Address-Data Multiplex | Open-drain bidirectional I/O; serves as low-order address/data bus during external memory access-requires external pull-ups for general-purpose use. |
| P1.0/T2 – P1.7/SPICLK/CEX4 | Port 1 / Timer2 / SPI / PCA | Bidirectional port with internal pull-ups; P1.5–P1.7 support SPI (MOSI/MISO/SPICLK); P1.0–P1.4 support PCA CEX0–CEX4; P1.0/P1.1 also serve Timer2 functions. |
| P2.0/A8 – P2.7/A15 | Port 2 / High-Order Address | Bidirectional port with internal pull-ups; outputs upper address byte (A8–A15) during external memory fetches-enables 64 kB external addressing. |
| P3.0/RXD – P3.7/RD | Port 3 / Serial & Control | Dedicated peripheral functions: RXD/TXD (UART), INT0/INT1 (external interrupts), T0/T1 (timer inputs), WR/RD (external memory strobes). |
| RST, EA, ALE/PROG, PSEN, XTAL1, XTAL2, VDD, VSS | Control & Power | RST: active-high reset; EA: external access enable (VDD = internal execution); ALE/PROG: address latch enable/flash programming pulse; PSEN: external program memory read strobe. |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Operation | Software-selectable 6-clock-per-machine-cycle mode doubles effective throughput at same crystal frequency-reduces EMI by allowing halved clock rate for equivalent performance. |
| In-System Programming (ISP) | Enables firmware updates in end-product under software control via UART-eliminates need for external programmers and supports field upgrades without hardware intervention. |
| In-Application Programming (IAP) | Allows flash memory reconfiguration while application runs-enables dynamic parameter storage, bootloader self-update, and adaptive firmware partitioning. |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) with PWM, edge-triggered capture, and software timer modes-replaces discrete timing ICs in motor control and signal generation. |
| Brownout Detection | Hardware reset and optional interrupt triggered at 2.35 V-prevents erratic operation during power sag and ensures deterministic recovery in battery-powered or unregulated supplies. |
| Low-Power Modes | Idle mode halts CPU while preserving RAM and registers; Power-down mode stops oscillator and reduces current to µA range-wakes via external interrupt on P3.2/P3.3. |
Applications
| Industrial PLC I/O Module | Smart Energy Meter |
|---|---|
|
Use Scenario: Standalone I/O expansion node in distributed control systems with analog input conditioning, relay drive, and Modbus RTU communication. IC Role / Device Role / Timing Role: Primary controller executing real-time scan logic, managing SPI ADCs/DACs, and handling UART-based Modbus protocol stack. Use Value: 64 kB flash accommodates full protocol stack + application logic; X2 mode ensures deterministic 10 ms scan cycle at 22.1184 MHz; PLCC44 supports ruggedized socketed field replacement. |
Use Scenario: Embedded metering unit measuring voltage, current, and energy consumption with tamper detection and RS-485 data upload. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC interface, EEPROM logging, LCD driver, and isolated RS-485 transceiver control. Use Value: Integrated PCA generates precise PWM for backlight dimming and timing-critical zero-crossing detection; brownout detection prevents corrupted kWh accumulation during grid sags. |
| Factory Automation Sensor Hub | Medical Diagnostic Instrument Controller |
|
Use Scenario: Multi-sensor aggregator collecting temperature, humidity, and vibration data from CAN/RS-485 field devices for edge preprocessing. IC Role / Device Role / Timing Role: Central data concentrator running sensor fusion algorithms, local alarm logic, and buffered data transmission to gateway. Use Value: 1 kB RAM supports double-buffered sensor queues; ISP enables remote calibration update; high-current P1 pins directly drive optocouplers for isolation interface control. |
Use Scenario: Portable ultrasound or blood glucose analyzer requiring low-power operation, precise timing for analog sampling, and secure firmware updates. IC Role / Device Role / Timing Role: Main controller coordinating ADC sampling sequence, display refresh, button debounce, and encrypted firmware validation. Use Value: IAP allows signed firmware patches without device recall; 3 V operation matches Li-ion battery discharge curve; −40 °C to +85 °C rating supports clinical and transport environments. |
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-RLTUM | 51-compatible with 64 kB flash, but lacks X2 mode and PCA; uses different ISP protocol and has no brownout detection. | Requires external timing peripherals for PWM/capture; less robust in undervoltage conditions; limited to 0–70 °C. | Select when legacy Atmel toolchain compatibility is required and advanced timing features are unnecessary. |
| STC89C52RC-PD | Enhanced 8051 with 8 kB flash, no IAP, no PCA, and only basic ISP; operates at 5 V, not 3 V. | Cannot replace P89LV51RD2FA,512 in low-voltage or field-upgradable designs; lacks industrial temperature range and EMI-reduction features. | Consider only for cost-sensitive, non-upgradable 5 V legacy designs where flash size and temperature range are secondary. |
Compared with AT89C51ED2-RLTUM and STC89C52RC-PD, the P89LV51RD2FA,512 delivers unique value through its X2 mode for throughput scaling, integrated PCA eliminating external timers, and true industrial −40 °C to +85 °C operation with brownout protection-making it optimal for upgradable, timing-critical embedded controllers.
Availability
P89LV51RD2FA,512 is available at Aetrix Electronics and suitable for industrial automation, smart metering, factory sensor hubs, and medical diagnostic instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P89LV51RD2FA,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 expertise in microcontrollers and mixed-signal integration.
The P89LV51RD2FA,512 belongs to NXP's legacy 80C51-based microcontroller family designed for cost-sensitive, reliability-critical embedded systems requiring field-upgradability, low EMI, and industrial environmental resilience.
FAQ
What is the maximum operating frequency of the P89LV51RD2FA,512?
The P89LV51RD2FA,512 supports operation up to 33 MHz at 3 V. In standard 12-clock mode, this yields 2.75 MIPS; in X2 (6-clock) mode, it achieves 5.5 MIPS. Frequency validation is specified across the full −40 °C to +85 °C temperature range, and crystal oscillator stability must meet 0.1% tolerance for reliable boot and ISP operation. The P89LV51RD2FA,512 does not support frequencies beyond 33 MHz.
Does the P89LV51RD2FA,512 support in-application programming (IAP)?
Yes, the P89LV51RD2FA,512 fully supports IAP: flash memory can be reconfigured while the application is running. This is enabled via dedicated ISP/IAP firmware in Block 1 of flash, accessible by setting SWR=0 and BSEL=0 in the FCF register. IAP allows dynamic firmware patching, parameter table updates, and bootloader self-modification-critical for certified medical or utility-grade devices where field updates must avoid full reboots. The P89LV51RD2FA,512 implements hardware write-protection and sector erase control to prevent accidental corruption.
What is the function of the ALE/PROG pin on the P89LV51RD2FA,512?
The ALE/PROG pin on the P89LV51RD2FA,512 serves dual roles: as Address Latch Enable during external memory accesses (emitted at 1/6 crystal frequency in 12-clock mode, 1/3 in X2 mode), and as the programming pulse input for flash programming. During reset, excessive capacitive loading (>30 pF) on ALE may cause unintended mode entry-NXP specifies a 3 kΩ–50 kΩ pull-up to VDD to stabilize it. When AO bit is set, ALE is disabled to reduce EMI, a feature leveraged in noise-sensitive industrial designs using the P89LV51RD2FA,512.
How does the P89LV51RD2FA,512 handle brownout conditions?
The P89LV51RD2FA,512 incorporates a hardware brownout detection circuit with a fixed 2.35 V threshold. When VDD drops below this level, it asserts a reset after four oscillator cycles-ensuring deterministic restart before logic corruption occurs. An optional brownout interrupt (enabled via EBO bit in IEN1) routes execution to 004BH for graceful shutdown or data save. Unlike software resets, brownout reset clears the BSEL bit but preserves SWR state, maintaining consistent flash banking behavior. This behavior is validated across the full −40 °C to +85 °C range of the P89LV51RD2FA,512.
Can the P89LV51RD2FA,512 operate from a 5 V supply?
No, the P89LV51RD2FA,512 is strictly a 3 V device-its absolute maximum VDD rating is 3.6 V, and operation outside 2.7 V–3.6 V violates specifications. Attempting 5 V operation will damage the IC. The 3 V design enables lower power consumption, reduced EMI, and compatibility with modern battery chemistries and LDO regulators. For 5 V systems, external level-shifting or voltage translation is required on all I/O lines interfacing with the P89LV51RD2FA,512, and the crystal oscillator must be rated for 3 V operation.
P89LV51RD2FA,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:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K 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:
P89LV51RD2FA,512 FAQ
1.How can I place an order for P89LV51RD2FA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89LV51RD2FA,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 P89LV51RD2FA,512 reliable?
The price and inventory of P89LV51RD2FA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89LV51RD2FA,512 is usually 5 days.
3.What payment methods are accepted for P89LV51RD2FA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89LV51RD2FA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89LV51RD2FA,512?
P89LV51RD2FA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89LV51RD2FA,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 P89LV51RD2FA,512?
For technical support, including P89LV51RD2FA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89LV51RD2FA,512 requirements.
6.How does Aetrix verify that P89LV51RD2FA,512 is sourced from the original manufacturer or authorized distributors?
All P89LV51RD2FA,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 P89LV51RD2FA,512 meets industry standards.
7.What is the process for return or replacement of P89LV51RD2FA,512?
All P89LV51RD2FA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P89LV51RD2FA,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 P89LV51RD2FA,512 part is unused and in its original packaging.
Return procedure for P89LV51RD2FA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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