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NXP Semiconductors P89C51RC2FA/01,529
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- Part No.:
- P89C51RC2FA/01,529
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89C51RC2FA/01,529.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,012
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Product details
Overview
P89C51RC2FA/01 from NXP Semiconductors (formerly Philips) is an 8-bit Flash microcontroller based on the 80C51 architecture, featuring 32 KB ISP/IAP Flash program memory, 512 B RAM, four 8-bit I/O ports, three 16-bit timers, and a programmable counter array (PCA) with PWM and capture/compare capability. It operates across –40°C to +85°C in PLCC-44 package and supports 6-clock/12-clock mode selection for performance scaling up to 20 MHz (6-clock) or 33 MHz (12-clock), targeting industrial motor control and embedded automation systems.
For engineers reviewing the P89C51RC2FA/01 datasheet, P89C51RC2FA/01 pinout, P89C51RC2FA/01 application, or P89C51RC2FA/01 equivalent, key selection criteria include its extended temperature range (–40°C to +85°C), PLCC-44 packaging, 32 KB Flash with in-system programming, PCA-based PWM generation, and dual clock-mode flexibility for power/performance trade-offs in real-time control designs.
Technical Context
The P89C51RC2FA/01 implements a static CMOS 80C51-compatible CPU core with full instruction set compatibility and adds enhanced peripherals including a 5-channel Programmable Counter Array (PCA), full-duplex UART with framing error detection and automatic address recognition, and configurable peripheral clocking via CKCON register bits. Its Flash memory supports both In-System Programming (ISP) and In-Application Programming (IAP), enabling field firmware updates without hardware reprogramming.
It features four interrupt priority levels, seven interrupt sources, and low-power modes (Idle, Power-down, Stop Clock), with asynchronous port reset and programmable clock-out on P1.0. The device uses a factory-default 12-clock mode but allows runtime switching to 6-clock mode via SFR bit X2 (CKCON.0) or Flash configuration bit FX2 - enabling dynamic optimization of throughput versus current consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with 100% instruction set compatibility and static operation down to 0 Hz. |
| Flash Memory | 32 KB ISP/IAP Flash - enables field firmware updates via UART or parallel programmer without removing the device. |
| RAM | 512 B on-chip RAM - sufficient for real-time control stacks and intermediate data buffering without external expansion. |
| Clock Modes | Configurable 6-clock or 12-clock per machine cycle - delivers up to 20 MHz (6-clock) or 33 MHz (12-clock) operation at 5 V. |
| I/O & Peripherals | Four 8-bit bidirectional ports, three 16-bit timers, PCA with 5 capture/compare modules and PWM output capability. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments where thermal stability and reliability are critical. |
| Package | PLCC-44 (SOT187-2) - surface-mount, leaded chip carrier with internal heat dissipation and robust mechanical mounting. |
Pinout & Package
Package: PLCC-44 (SOT187-2), plastic leaded chip carrier with 44 leads, lead pitch 1.27 mm, body size 16.5 mm × 16.5 mm, operating temperature range –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 bidirectional I/O / AD0–AD7 multiplexed bus | Open-drain port used for external memory addressing/data transfer; requires external pull-ups when used as general-purpose I/O. |
| P1.0–P1.7 | Port 1 bidirectional I/O with alternate functions | Includes T2, T2EX, ECI, and CEX0–CEX4 - enables PCA-based PWM, input capture, and external clock input for timing-critical control loops. |
| P2.0–P2.7 | Port 2 bidirectional I/O / A8–A15 high-order address bus | Drives upper address byte during external memory access; retains I/O functionality when not used for addressing. |
| P3.0–P3.7 | Port 3 bidirectional I/O with secondary functions | Provides RxD/TxD (UART), INT0/INT1 (external interrupts), T0/T1 (timer inputs), WR/RD (memory strobes) - integrates serial comms and event-driven control in one port. |
| RST | Active-high reset input | Requires ≥2 machine cycles (12/24 oscillator periods) high pulse; supports power-on reset with RC network and asynchronous port initialization. |
| XTAL1/XTAL2 | Crystal oscillator input/output | Supports quartz crystal (1–20 MHz) or external clock source; enables precise timing for UART baud rates and PWM frequency stability. |
| EA/VPP | External access enable / programming voltage | High = execute from internal Flash; low = fetch code from external memory; also accepts VPP during Flash programming. |
| ALE/PROG | Address latch enable / programming pulse | Outputs address latch pulse during external memory access; can be disabled via AUXR.0 to reduce EMI or repurposed as general I/O. |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programming (ISP) | Enables Flash reprogramming via UART using built-in boot ROM loader - eliminates need for external programmer in production or field service. |
| In-Application Programming (IAP) | Allows firmware self-update during runtime using ROM-resident routines - supports remote upgrades over modem or wired link without halting system operation. |
| Programmable Counter Array (PCA) | Five independent 16-bit modules support PWM generation, input capture, software timers, and high-resolution pulse-width measurement - ideal for motor phase control and encoder interfacing. |
| Dual Clock Mode Flexibility | CPU and peripherals can be independently clocked at fosc/6 or fosc/12 - enables simultaneous high-speed PWM (6-clock) and low-power UART (12-clock) in same application. |
| Extended Temperature Range | Rated for –40°C to +85°C operation in PLCC-44 package - ensures reliable startup and sustained performance in uncontrolled industrial enclosures or outdoor equipment. |
| Low-Power Operation Modes | Idle, Power-down, and Stop Clock modes reduce current draw to µA-levels - extends battery life in portable instrumentation and enables wake-on-interrupt responsiveness. |
Applications
| Industrial Motor Control | Embedded Automation Controller |
|---|---|
|
Use Scenario: Closed-loop speed and position control of 3-phase BLDC motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Primary controller executing PID algorithms, generating complementary PWM signals via PCA, and sampling analog feedback via external ADC interface. Use Value: 32 KB Flash accommodates complex motion profiles and safety logic; PCA's 5-channel PWM enables gate driver timing with <1 µs jitter; 6-clock mode delivers deterministic 20 MHz execution for sub-100 µs control loops. |
Use Scenario: Standalone PLC module managing discrete I/O, analog monitoring, and Modbus RTU communication in factory floor nodes. IC Role / Device Role / Timing Role: Central processing unit handling ladder logic scan, serial protocol stack, and real-time I/O state management with interrupt-driven edge detection. Use Value: Four priority-level interrupts ensure timely response to emergency stop inputs; UART with automatic address recognition simplifies multi-drop RS-485 networks; 512 B RAM supports tag database and protocol buffers without external SRAM. |
| Power Supply Monitoring System | Test & Measurement Instrumentation |
|
Use Scenario: AC/DC power supply with digital supervision, overvoltage/overcurrent protection, and telemetry reporting via UART. IC Role / Device Role / Timing Role: Supervisor MCU sampling voltage/current sensors, controlling PWM feedback loop, and logging fault events to non-volatile Flash. Use Value: ISP capability allows firmware patching post-deployment; Power-down mode reduces standby current to <10 µA during idle periods; –40°C to +85°C rating ensures operation near hot power stages. |
Use Scenario: Portable multimeter or signal generator requiring precise timing, button scanning, LCD driving, and USB-to-UART bridge functionality. IC Role / Device Role / Timing Role: Host controller managing human interface, calibration routines, and serial data streaming to PC host via UART-to-USB converter. Use Value: Programmable clock-out on P1.0 provides stable reference for external DAC/ADC; asynchronous port reset enables clean UI restart without full power cycle; PLCC-44 package supports manual rework and long-term test fixture durability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit Flash microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P89C51RD2FA/01 | 64 KB Flash, 1 KB RAM, same PLCC-44 package and –40°C to +85°C rating. | Higher memory capacity supports larger protocol stacks or firmware-over-the-air (FOTA) image storage. | Select when future firmware growth or dual-bank update capability is required; otherwise P89C51RC2FA/01 offers optimal cost/memory balance. |
| AT89C51ED2-RL24 | Atmel derivative with 12 KB Flash, 512 B RAM, 20 MHz max, PDIP-40 package, commercial temp (0°C to +70°C). | Lacks PCA, ISP/IAP, and extended temperature range; limited to basic control tasks in benign environments. | Choose only for legacy design continuity or cost-sensitive consumer-grade applications where industrial reliability is not required. |
Compared with P89C51RD2FA/01, the P89C51RC2FA/01 trades 32 KB less Flash for lower cost and identical peripheral feature set; compared with AT89C51ED2-RL24, it delivers superior industrial qualification, advanced timing peripherals, and field-programmability - making it the preferred choice for ruggedized embedded control.
Availability
P89C51RC2FA/01 is available at Aetrix Electronics and suitable for industrial motor control, embedded automation controllers, and power supply monitoring systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for P89C51RC2FA/01 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 delivering high-performance mixed-signal and microcontroller solutions for automotive, industrial, and IoT markets, with deep heritage in 80C51 architecture development.
The P89C51RC2FA/01 belongs to NXP's legacy 80C51 Flash microcontroller family, designed specifically for cost-sensitive, reliability-critical industrial control applications requiring field-upgradable firmware and deterministic real-time behavior.
FAQ
What is the maximum operating frequency of the P89C51RC2FA/01?
The P89C51RC2FA/01 supports up to 20 MHz in 6-clock mode and 33 MHz in 12-clock mode at 5 V supply. Its maximum frequency is determined by the selected clock mode and voltage level - with 33 MHz achievable only in 12-clock mode and 20 MHz being the upper limit in 6-clock mode. Both modes are fully supported across the –40°C to +85°C temperature range specified for the P89C51RC2FA/01.
Does the P89C51RC2FA/01 support in-system programming (ISP)?
Yes, the P89C51RC2FA/01 supports In-System Programming via its UART interface using the built-in boot ROM loader. This allows Flash memory to be reprogrammed while the device remains soldered in the target system, without requiring a dedicated external programmer. The P89C51RC2FA/01 does not require any user code in Flash to enable ISP - the loader resides permanently in ROM and activates upon specific UART command sequences.
What package type and pin count does the P89C51RC2FA/01 use?
The P89C51RC2FA/01 is supplied in a PLCC-44 package (SOT187-2), a 44-pin plastic leaded chip carrier with J-leads. It features a square footprint (16.5 mm × 16.5 mm), 1.27 mm lead pitch, and is rated for operation from –40°C to +85°C - distinguishing it from commercial-grade variants like P89C51RC2BA/01 (0°C to +70°C) that share the same package but different temperature screening.
How many channels does the Programmable Counter Array (PCA) have on the P89C51RC2FA/01?
The P89C51RC2FA/01 includes a 5-channel Programmable Counter Array (PCA), with dedicated pins CEX0 through CEX4 mapped to P1.3–P1.7. Each channel supports capture, compare, PWM, and software timer modes. The PCA operates independently of the CPU and can be clocked at either fosc/6 or fosc/12 - enabling precise, jitter-free waveform generation essential for motor control and signal generation applications using the P89C51RC2FA/01.
Is the P89C51RC2FA/01 pin-compatible with other members of the P89C51Rx2xx family?
Yes, the P89C51RC2FA/01 is pin-compatible with other PLCC-44 variants in the P89C51RA2/RB2/RC2/RD2xx family, including P89C51RA2FA/01, P89C51RB2FA/01, and P89C51RD2FA/01. All share identical pinouts, electrical characteristics, and peripheral mapping - differing only in Flash size (8 KB to 64 KB), RAM size (512 B to 1 KB), and default clock mode configuration. This allows direct hardware reuse across product tiers when upgrading firmware requirements.
P89C51RC2FA/01,529 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 89C
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 33MHz
- Connectivity:
- UART/USART
- Peripherals:
- 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):
- 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:
P89C51RC2FA/01,529 FAQ
1.How can I place an order for P89C51RC2FA/01,529 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89C51RC2FA/01,529 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 P89C51RC2FA/01,529 reliable?
The price and inventory of P89C51RC2FA/01,529 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89C51RC2FA/01,529 is usually 5 days.
3.What payment methods are accepted for P89C51RC2FA/01,529?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89C51RC2FA/01,529 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89C51RC2FA/01,529?
P89C51RC2FA/01,529 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89C51RC2FA/01,529 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 P89C51RC2FA/01,529?
For technical support, including P89C51RC2FA/01,529 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89C51RC2FA/01,529 requirements.
6.How does Aetrix verify that P89C51RC2FA/01,529 is sourced from the original manufacturer or authorized distributors?
All P89C51RC2FA/01,529 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 P89C51RC2FA/01,529 meets industry standards.
7.What is the process for return or replacement of P89C51RC2FA/01,529?
All P89C51RC2FA/01,529 units undergo pre-shipment inspection (PSI). If there is an issue with P89C51RC2FA/01,529, 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 P89C51RC2FA/01,529 part is unused and in its original packaging.
Return procedure for P89C51RC2FA/01,529:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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