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NXP Semiconductors P89V51RC2FA,512
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- Part No.:
- P89V51RC2FA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89V51RC2FA,512.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
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Product details
Overview
P89V51RC2FA,512 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 32 kB on-chip flash program memory, 1 kB data RAM, 5 V operation up to 40 MHz, X2 mode (6-clock/machine cycle), and PLCC44 packaging. It integrates SPI, enhanced UART, PCA with PWM/capture/compare, three 16-bit timers, and supports in-system programming (ISP) and in-application programming (IAP) for field firmware updates in industrial control and embedded instrumentation.
For engineers reviewing the P89V51RC2FA,512 datasheet, P89V51RC2FA,512 pinout, P89V51RC2FA,512 application, or P89V51RC2FA,512 equivalent, key selection considerations include its −40 °C to +85 °C industrial temperature grade, PLCC44 package compatibility with legacy 8051 designs, dual clock mode flexibility (12- vs. 6-clock), and brownout detection at 2.35 V for robust power management.
Technical Context
The P89V51RC2FA,512 implements a standard 80C51 CPU core with extended peripheral integration: a programmable counter array (PCA) supporting five capture/compare modules (CEX0–CEX4), two serial interfaces (UART + SPI), and dual DPTR registers. Its memory architecture separates 32 kB flash (Block 0) from ISP/IAP routines (Block 1), with bank selection controlled via SWR/BSEL bits in FCF register.
It supports low-EMI operation through ALE inhibit and X2 mode-reducing clock frequency by half while maintaining throughput-plus brownout detection (2.35 V threshold), watchdog timer, and four priority-level interrupts. All I/O ports feature internal pull-ups; Port 1 pins P1.5–P1.7 provide 16 mA high-current drive for direct LED or relay interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 8-bit CPU with 12- or 6-clock per machine cycle selectable via software |
| Flash Memory | 32 kB user code flash with ISP and IAP support; enables field firmware updates without hardware reprogramming |
| Data RAM | 1024 B on-chip RAM (128 B direct + 128 B indirect + 768 B expanded via MOVX) |
| Operating Voltage | 5 V ±10 %, functional from 0 MHz to 40 MHz clock frequency |
| Temperature Range | −40 °C to +85 °C industrial grade, validated for extended thermal reliability |
| Package | PLCC44 (SOT187-2), 44-pin plastic leaded chip carrier with 1.27 mm pitch |
| I/O Capability | Four 8-bit bidirectional ports; Port 1 pins P1.5–P1.7 rated for 16 mA sink/source |
Pinout & Package
Package: PLCC44 (SOT187-2), 44-lead plastic leaded chip carrier, body size 16.5 × 16.5 × 4.0 mm, lead pitch 1.27 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0/AD0 – P0.7/AD7 | Port 0 / Address-Data Multiplex | Open-drain bidirectional I/O; multiplexes low-order address/data 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; P1.0–P1.1 serve Timer2 functions; P1.2–P1.7 support SPI (MOSI/MISO/SPICLK) and PCA capture/compare (CEX0–CEX4) |
| P2.0/A8 – P2.7/A15 | Port 2 / High-Order Address | Bidirectional port with internal pull-ups; outputs high-order address bits A8–A15 during external memory accesses |
| P3.0/RXD – P3.7/RD | Port 3 / Serial / Control | Bidirectional port with internal pull-ups; provides UART (RXD/TXD), external interrupts (INT0/INT1), timer inputs (T0/T1), and external memory strobes (WR/RD) |
| EA | External Access Enable | Input controlling code fetch source: HIGH = internal flash execution; LOW = external program memory access |
| ALE/PROG | Address Latch Enable / Programming Pulse | Output latching P0 address bits during external memory access; also serves as PROG input for flash programming |
| RST | Reset Input | Active-HIGH reset requiring ≥2 machine cycles; entry into external host mode triggered by PSEN pulse while RST held HIGH |
| XTAL1/XTAL2 | Oscillator Inputs | Connects to crystal/resonator (1–40 MHz); XTAL1 is input to oscillator amplifier, XTAL2 is output |
| VDD/VSS | Power Supply / Ground | VDD = 5 V ±10 % supply; VSS = reference ground; decoupling capacitors required near pins |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Clock Flexibility | Selectable 6-clock/machine cycle mode doubles instruction throughput at same frequency-or halves clock frequency for EMI reduction without performance loss |
| In-System & In-Application Programming | ISP enables firmware updates via UART/SPI in final product; IAP allows flash reconfiguration during live application execution |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) support PWM generation, input capture, and software timers with high-resolution timing |
| Enhanced Serial Interfaces | Dedicated SPI controller plus enhanced UART with frame error detection (FE_), auto-baud capability, and multiple modes (SM0–SM2) |
| Industrial Power Management | Brownout detection at 2.35 V with interrupt/reset option; programmable watchdog timer; Idle and Power-down low-power modes with external wake-up |
Applications
| Industrial Motor Control | Embedded Instrumentation |
|---|---|
Use Scenario: Closed-loop speed regulation of DC/stepper motors in factory automation panels using analog feedback and digital PWM output. IC Role / Device Role / Timing Role: Central controller executing PID algorithms, generating precise PWM signals via PCA modules, and managing UART-based HMI communication. Use Value: X2 mode delivers deterministic 40 MHz-equivalent throughput for real-time loop execution; 16 mA Port 1 pins directly drive optocouplers or gate drivers without external buffers. | Use Scenario: Portable multimeter or environmental sensor node acquiring analog readings, performing calibration math, and logging data over RS-232. IC Role / Device Role / Timing Role: Data acquisition engine with ADC interface (via P0 ADx pins), serial communication handler (enhanced UART), and nonvolatile parameter storage in flash. Use Value: 32 kB flash stores full firmware + calibration tables; IAP enables field recalibration without physical device replacement; −40 °C to +85 °C rating ensures outdoor deployment reliability. |
| Legacy 8051 System Upgrade | Low-EMI Consumer Electronics |
Use Scenario: Drop-in replacement for obsolete 8051 variants in existing DIP40 or PLCC44-based PCBs requiring flash-based firmware agility. IC Role / Device Role / Timing Role: Pin-compatible 80C51 upgrade delivering modern ISP/IAP, larger memory, and improved peripherals without board redesign. Use Value: PLCC44 footprint matches legacy layouts; identical SFR map and instruction set ensure zero-software migration effort; EA/ALE/PSEN behavior preserves external memory interface timing. | Use Scenario: Remote control or smart home hub where radiated emissions must comply with FCC Class B limits. IC Role / Device Role / Timing Role: Main system controller reducing EMI via ALE inhibit and X2 mode-enabling 20 MHz crystal to deliver 40 MHz-equivalent performance with halved fundamental clock harmonics. Use Value: Low-EMI mode cuts broadband noise by suppressing ALE transitions; 6-clock mode reduces switching activity across all internal buses, easing EMC certification. |
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 | 32 kB flash, 1280 B RAM, 5 V, 0–60 MHz; no X2 mode; ISP only (no IAP); different SFR layout for PCA and UART | Lacks in-application programming and 6-clock mode; requires modified firmware for PCA register access and timing-critical ISR handling | Choose when legacy Atmel toolchain compatibility is mandatory and field firmware update during runtime is unnecessary |
| P89V51RD2FA | 64 kB flash, same 1 kB RAM, identical X2/ISP/IAP/PCA/peripheral set; shares PLCC44 package and pinout | Provides double flash capacity for larger firmware images or dual-bank OTA updates; otherwise functionally identical in hardware interface and timing | Choose when future firmware growth or secure bootloader partitioning requires >32 kB flash, with zero hardware or driver changes |
Compared with AT89C51RD2-RL24, P89V51RC2FA,512 offers superior real-time flexibility via IAP and deterministic low-EMI operation via X2 mode; versus P89V51RD2FA, it trades flash capacity for cost-sensitive deployments where 32 kB suffices and BOM optimization matters.
Availability
P89V51RC2FA,512 is available at Aetrix Electronics and suitable for industrial motor control, embedded instrumentation, legacy 8051 system upgrades, and low-EMI consumer electronics requiring stable component supply across long-lifecycle production programs.
Supply support for P89V51RC2FA,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.
The P89V51RC2FA,512 belongs to NXP's legacy 80C51 microcontroller family, designed specifically for cost-sensitive, high-reliability embedded systems requiring flash-based programmability, industrial temperature operation, and backward compatibility with classic 8051 toolchains and hardware ecosystems.
FAQ
What is the maximum operating frequency of the P89V51RC2FA,512?
The P89V51RC2FA,512 operates at up to 40 MHz with a 5 V supply. In standard 12-clock mode, this yields 3.33 million instructions per second (MIPS); in X2 (6-clock) mode, it achieves 6.67 MIPS at the same 40 MHz crystal frequency. Frequency selection is software-configurable via the AUXR register, and the device remains fully functional down to 0 Hz (stop mode).
Does the P89V51RC2FA,512 support in-application programming (IAP)?
Yes, the P89V51RC2FA,512 fully supports IAP. Its flash memory is divided into Block 0 (32 kB user code) and Block 1 (ISP/IAP routines). By clearing the BSEL bit (FCF.0) while SWR=0, Block 1 overlays the lower 8 kB of address space, enabling safe reprogramming of flash sectors-including active code regions-while the application continues running from other memory pages.
What package type is used for the P89V51RC2FA,512?
The P89V51RC2FA,512 uses a PLCC44 package (SOT187-2): a 44-lead plastic leaded chip carrier with 1.27 mm lead pitch, 16.5 × 16.5 mm body, and J-lead configuration. This package is pin-compatible with other members of the P89V51RB2/RC2/RD2 family in PLCC44 variant and maintains mechanical and thermal compatibility with legacy 8051 PLCC sockets.
How does the X2 mode reduce electromagnetic interference (EMI) in the P89V51RC2FA,512?
The X2 mode in the P89V51RC2FA,512 reduces EMI by allowing the system to achieve identical instruction throughput at half the crystal frequency-for example, 20 MHz crystal in X2 mode delivers the same 6.67 MIPS as 40 MHz in standard mode. Lower fundamental clock frequency directly suppresses harmonic energy, and ALE inhibition (via AO bit) eliminates a major noise source during external memory access, easing FCC/CE compliance.
What is the brownout detection threshold for the P89V51RC2FA,512?
The P89V51RC2FA,512 features a fixed brownout detection threshold of 2.35 V. When VDD drops below this level, the device generates a brownout interrupt (if enabled via EBO bit) or forces a reset. The POF flag in PCON indicates power-on conditions, and brownout resets clear the BSEL bit (FCF.0) but preserve the SWR bit (FCF.1), ensuring predictable flash bank mapping after recovery.
P89V51RC2FA,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:
- 32KB (32K 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:
P89V51RC2FA,512 FAQ
1.How can I place an order for P89V51RC2FA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89V51RC2FA,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 P89V51RC2FA,512 reliable?
The price and inventory of P89V51RC2FA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89V51RC2FA,512 is usually 5 days.
3.What payment methods are accepted for P89V51RC2FA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89V51RC2FA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89V51RC2FA,512?
P89V51RC2FA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89V51RC2FA,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 P89V51RC2FA,512?
For technical support, including P89V51RC2FA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89V51RC2FA,512 requirements.
6.How does Aetrix verify that P89V51RC2FA,512 is sourced from the original manufacturer or authorized distributors?
All P89V51RC2FA,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 P89V51RC2FA,512 meets industry standards.
7.What is the process for return or replacement of P89V51RC2FA,512?
All P89V51RC2FA,512 units undergo pre-shipment inspection (PSI). If there is an issue with P89V51RC2FA,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 P89V51RC2FA,512 part is unused and in its original packaging.
Return procedure for P89V51RC2FA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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