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NXP Semiconductors P89V51RC2FN,112
- Part No.:
- P89V51RC2FN,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
P89V51RC2FN,112.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,182
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Product details
Overview
P89V51RC2FN,112 from NXP Semiconductors is an 8-bit 80C51 microcontroller in DIP40 package with 32 kB on-chip flash program memory, 1 kB data RAM, 5 V operation (0–40 MHz), X2 mode for doubled throughput or halved EMI, and integrated ISP/IAP capability. It serves as a drop-in upgrade for legacy 8051 designs in industrial control panels requiring field firmware updates and low-EMI timing.
For engineers reviewing the P89V51RC2FN,112 datasheet, P89V51RC2FN,112 pinout, P89V51RC2FN,112 application, or P89V51RC2FN,112 equivalent, key selection criteria include its 32 kB flash density, DIP40 through-hole compatibility, X2/12-clock mode flexibility, brownout detection at 2.35 V, and hardware support for SPI, PCA PWM, and dual DPTR-critical for real-time motor control and legacy system modernization.
Technical Context
The P89V51RC2FN,112 implements a standard 80C51 CPU core with two selectable clock modes: default 12-clock-per-machine-cycle or high-efficiency 6-clock mode enabled via software or ISP. Its memory architecture includes separate 32 kB flash (Block 0) and dedicated IAP/ISP routines (Block 1), with bank selection controlled by SWR/BSEL bits in FCF register.
Peripheral integration includes a programmable counter array (PCA) with five capture/compare modules (CEX0–CEX4), enhanced UART with framing error detection, SPI interface with master/slave support, three 16-bit timers/counters, and four 8-bit I/O ports-with Port 1 pins P1.5–P1.7 rated for 16 mA drive. Brownout detection triggers reset at 2.35 V, and watchdog timer supports configurable timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 8-bit CPU with dual clock mode (6/12 clocks per machine cycle) |
| Flash Memory | 32 kB user code flash with ISP and IAP support-enables in-system reprogramming and runtime firmware updates |
| Data RAM | 1024 B on-chip RAM, including 768 B expanded indirectly addressable RAM via EXTRAM bit |
| Operating Voltage | 5 V ±10 %, functional from 0 MHz to 40 MHz-supports both crystal and resonator oscillators |
| Temperature Range | −40 °C to +85 °C-qualified for industrial ambient environments |
| Package | DIP40 (600 mil), SOT129-1-through-hole compatible for prototyping and legacy board replacement |
| EMI Reduction | Low-EMI mode via ALE inhibit and X2 mode allowing halved clock frequency at same performance |
Pinout & Package
Package: Plastic dual in-line package; 40 leads (600 mil), SOT129-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0/AD0 – P0.7/AD7 (pins 39–32) | Multiplexed address/data bus / I/O port | Open-drain bidirectional port; provides low-order address and data during external memory access; requires external pull-ups for general-purpose I/O |
| P1.0/T2 – P1.7/SPICLK/CEX4 (pins 1–8) | General I/O with peripheral functions | Port 1 supports Timer2 I/O (P1.0/T2), PCA capture/compare (CEX0–CEX4), SPI (MOSI/MISO/SPICLK), and SS; P1.5–P1.7 drive 16 mA |
| P2.0/A8 – P2.7/A15 (pins 21–28) | High-order address bus / I/O port | Provides A8–A15 during external memory access; internal pull-ups enable use as input port when externally pulled low |
| P3.0/RXD – P3.7/RD (pins 10–17) | Secondary function I/O port | Serial interface (RXD/TXD), external interrupts (INT0/INT1), timer inputs (T0/T1), and external memory control (WR/RD) |
| RST (pin 9) | Reset input | Active-HIGH reset requiring ≥2 machine cycles; entry into external host mode if PSEN toggled while RST held HIGH |
| EA (pin 31) | External access enable | Strap to VDD for internal flash execution; connect to VSS to fetch code from external program memory |
| ALE/PROG (pin 30) | Address latch enable / programming pulse | Outputs address latch pulse at 1/6 crystal frequency (1/3 in X2 mode); doubles as PROG input for flash programming |
| XTAL1/XTAL2 (pins 19/18) | Oscillator inputs | Connects to crystal or resonator; XTAL1 is amplifier input, XTAL2 is output; supports up to 40 MHz operation |
| VDD/VSS (pins 40/20) | Power supply | VDD = 5 V ±10 %; VSS = ground reference; decoupling capacitor required near VDD pin |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Selection | Software- or ISP-configurable 6-clock-per-cycle mode doubles instruction throughput or halves clock frequency to reduce EMI without redesign |
| In-System Programming (ISP) | Enables firmware updates in end-product via UART under software control-no external programmer required |
| In-Application Programming (IAP) | Allows flash reconfiguration-including bootloader and application code-while application runs, enabling dynamic feature updates |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) support PWM generation, input capture, and software timers with high-resolution timing |
| Brownout Detection | Hardware reset triggered at 2.35 V supply threshold-prevents erratic operation and flash corruption during undervoltage conditions |
| Dual Data Pointer (DPTR) | Second DPTR register enables efficient block memory transfers and string operations without software pointer management overhead |
Applications
| Industrial HMI Panels | Legacy Equipment Controllers |
|---|---|
Use Scenario: Standalone operator interface with keypad, LED indicators, and RS-232 diagnostics in factory-floor machinery. IC Role / Device Role / Timing Role: Primary 8051-compatible controller executing real-time polling, display refresh, and serial command parsing. Use Value: DIP40 footprint allows direct replacement of obsolete 8051 variants; 32 kB flash accommodates future UI enhancements without hardware change. | Use Scenario: Retrofit controller for aging PLC I/O modules requiring field-upgradable firmware and deterministic interrupt response. IC Role / Device Role / Timing Role: Central MCU managing discrete I/O scanning, watchdog supervision, and Modbus RTU communication. Use Value: X2 mode ensures 40 MHz-equivalent throughput at 20 MHz clock-reducing radiated emissions to meet CISPR 22 Class A limits. |
| Motor Drive Interface Boards | Smart Sensor Signal Conditioners |
Use Scenario: Brushless DC motor commutation logic board interfacing Hall sensors, PWM drivers, and host CAN bus. IC Role / Device Role / Timing Role: Real-time timing engine generating synchronized PWM outputs using PCA modules CEX2–CEX4. Use Value: Five PCA channels provide independent PWM generation and edge-capture for precise rotor position tracking without external logic. | Use Scenario: Analog sensor front-end with ADC interface (via P0 ADx pins), digital calibration storage, and UART telemetry output. IC Role / Device Role / Timing Role: Embedded signal processor converting analog sensor outputs to calibrated digital values and transmitting via UART. Use Value: 1 kB RAM supports multi-point calibration tables; ISP enables remote recalibration without physical access to the device. |
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; lacks X2 mode and PCA; uses different ISP protocol | No hardware PWM or capture capability; requires external timer IC for motor control | Select when higher max clock (60 MHz) is needed and PCA is unnecessary |
| STC89C52RC-PD | 8 kB flash, 512 B RAM, 5 V, 0–80 MHz; includes ISP but no IAP or X2 mode; lower ESD rating | Insufficient flash for complex UI or protocol stacks; no runtime reprogramming capability | Select for cost-sensitive, low-complexity control tasks where field updates are not required |
Compared with AT89C51RD2-RL24 and STC89C52RC-PD, the P89V51RC2FN,112 uniquely combines 32 kB flash, X2 mode for EMI reduction, full IAP/ISP, and five-channel PCA-making it the only option supporting runtime firmware patching and hardware-accelerated PWM in DIP40 format.
Availability
P89V51RC2FN,112 is available at Aetrix Electronics and suitable for industrial HMI panels, legacy equipment controllers, and motor drive interface boards requiring stable component supply and long-term obsolescence mitigation.
Supply support for P89V51RC2FN,112 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 P89V51RC2FN,112 belongs to NXP's legacy 80C51 microcontroller family, designed specifically to extend the life of 8051-based systems with enhanced flash density, in-field update capability, and industrial-grade reliability.
FAQ
What is the maximum operating frequency of the P89V51RC2FN,112?
The P89V51RC2FN,112 operates at up to 40 MHz across its specified temperature range (−40 °C to +85 °C). In X2 mode, it achieves twice the instruction throughput at the same clock frequency-e.g., 40 MHz X2 delivers performance equivalent to 80 MHz in standard 12-clock mode-without exceeding electrical ratings or thermal limits.
Does the P89V51RC2FN,112 support in-application programming (IAP)?
Yes, the P89V51RC2FN,112 fully supports IAP, allowing flash memory to be reconfigured-including bootloader and application code-while the main program is running. This capability is implemented via dedicated IAP routines in Block 1 flash and requires proper banking control using SWR and BSEL bits in the FCF register.
What package type does the P89V51RC2FN,112 use?
The P89V51RC2FN,112 uses a plastic dual in-line package with 40 leads (600 mil), designated SOT129-1. This DIP40 package provides through-hole mounting compatibility for prototyping, repair, and legacy board upgrades where surface-mount alternatives are unsuitable.
How does the X2 mode affect ALE signal behavior on the P89V51RC2FN,112?
In X2 mode, the ALE signal on the P89V51RC2FN,112 is emitted at one-third of the crystal frequency instead of the standard one-sixth. This higher ALE rate supports faster external memory latching but may increase capacitive loading sensitivity-NXP recommends adding a 3 kΩ–50 kΩ pull-up resistor to VDD if ALE loading exceeds 30 pF during reset.
Can the P89V51RC2FN,112 execute code from external memory?
Yes, the P89V51RC2FN,112 can execute code from external program memory when the EA pin is connected to VSS. In this configuration, the device uses P0 and P2 as multiplexed address/data bus (AD0–AD7 and A8–A15), and PSEN as the external program memory read strobe-enabling expansion beyond its 32 kB internal flash.
P89V51RC2FN,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- 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:
- Through Hole
- Supplier Device Package:
P89V51RC2FN,112 FAQ
1.How can I place an order for P89V51RC2FN,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89V51RC2FN,112 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 P89V51RC2FN,112 reliable?
The price and inventory of P89V51RC2FN,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89V51RC2FN,112 is usually 5 days.
3.What payment methods are accepted for P89V51RC2FN,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89V51RC2FN,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89V51RC2FN,112?
P89V51RC2FN,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89V51RC2FN,112 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 P89V51RC2FN,112?
For technical support, including P89V51RC2FN,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89V51RC2FN,112 requirements.
6.How does Aetrix verify that P89V51RC2FN,112 is sourced from the original manufacturer or authorized distributors?
All P89V51RC2FN,112 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 P89V51RC2FN,112 meets industry standards.
7.What is the process for return or replacement of P89V51RC2FN,112?
All P89V51RC2FN,112 units undergo pre-shipment inspection (PSI). If there is an issue with P89V51RC2FN,112, 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 P89V51RC2FN,112 part is unused and in its original packaging.
Return procedure for P89V51RC2FN,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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