My Inquiry
My Account
NXP Semiconductors P89C51RC2BN/01,112
- Part No.:
- P89C51RC2BN/01,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
P89C51RC2BN/01,112.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P89C51RC2BN/01 from NXP Semiconductors (formerly Philips) is an 8-bit 80C51-compatible Flash microcontroller with 32 KB ISP/IAP Flash, 512 B RAM, four 8-bit I/O ports, three 16-bit timers, enhanced UART, and Programmable Counter Array (PCA) supporting PWM and capture/compare-designed for motor control and embedded industrial systems operating at 5 V.
For engineers reviewing the P89C51RC2BN/01 datasheet, P89C51RC2BN/01 pinout, P89C51RC2BN/01 application, or P89C51RC2BN/01 equivalent, key selection criteria include 6/12-clock mode flexibility, on-the-fly peripheral clock configuration via CKCON register, in-system programmability without external loader, and PDIP-40 packaging for prototyping and legacy board compatibility.
Technical Context
The P89C51RC2BN/01 implements a static CMOS 80C51 core with full instruction set compatibility and extends it with dual-clock domain control: CPU clock (X2 bit) and independent peripheral clocks (T0X2, T1X2, SIX2, etc.) configurable via CKCON register. Its PCA module provides five capture/compare channels (CEX0–CEX4) mapped to Port 1 pins, enabling simultaneous PWM generation and event timing.
Flash memory supports both In-System Programming (ISP) via UART boot loader and In-Application Programming (IAP) using ROM-resident routines-enabling remote firmware updates and field reconfiguration. The device defaults to 12-clock mode but can be reprogrammed to 6-clock mode for 20 MHz operation (40 MHz equivalent performance) or dynamically switched during runtime.
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 with security lock bits; enables field firmware updates without removing MCU from system. |
| RAM | 512 B on-chip SRAM; supports external expansion up to 64 KB via MOVX instructions. |
| Clock Modes | Configurable 6-clock (20 MHz max) or 12-clock (33 MHz max) CPU mode; peripherals independently selectable per CKCON register. |
| I/O & Peripherals | Four 8-bit bidirectional ports; three 16-bit timers; full-duplex enhanced UART with framing error detection; five-channel PCA with PWM/capture/compare. |
| Package | PDIP-40 (SOT129-1); through-hole mounting compatible with breadboards, sockets, and legacy PCBs. |
| Supply Voltage | 4.5–5.5 V operation; supports standard TTL/CMOS logic interfacing and industrial power rails. |
Pinout & Package
Package: Plastic Dual In-Line Package (PDIP), 40-pin, SOT129-1 footprint, 0°C to +70°C operating temperature range, 4.5–5.5 V supply.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 (AD0–AD7) | Multiplexed address/data bus | Open-drain I/O used as low-order address/data during external memory access; requires external pull-ups for general-purpose use. |
| P1.0–P1.7 | General-purpose I/O with PCA functions | Includes T2, T2EX, ECI, CEX0–CEX4-supports five independent PWM outputs or edge-triggered capture inputs. |
| P2.0–P2.7 (A8–A15) | High-order address bus / I/O | Outputs upper address byte during 16-bit external memory access; functions as quasi-bidirectional port otherwise. |
| P3.0–P3.7 | Secondary function I/O | RxD/TxD (UART), INT0/INT1 (external interrupts), T0/T1 (timer inputs), WR/RD (memory strobes). |
| RST | Active-high reset input | Two-machine-cycle high pulse required; internal weak pull-down enables power-on reset with single capacitor to VCC. |
| XTAL1/XTAL2 | Crystal oscillator interface | Supports quartz crystal (1–20 MHz) or external clock source; drives on-chip inverting amplifier for system timing. |
| EA/VPP | External access enable / programming voltage | High = execute from internal Flash; low = fetch from external program memory; also receives VPP during Flash programming. |
| ALE/PROG | Address latch enable / programming pulse | Outputs two pulses per machine cycle for external latch control; disabled via AUXR.0 to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programming (ISP) | Serial Flash programming via UART using built-in ROM boot loader-no external programmer required for field updates. |
| In-Application Programming (IAP) | Runtime Flash reprogramming using ROM-resident routines-enables self-updating firmware and adaptive control algorithms. |
| 6/12-clock mode flexibility | CPU clock mode selectable via Flash bit or SFR X2; peripherals individually configurable for 6- or 12-clock timing-optimizes speed vs. power per subsystem. |
| Programmable Counter Array (PCA) | Five independent capture/compare modules (CEX0–CEX4) support simultaneous PWM generation, pulse-width measurement, and frequency synthesis. |
| Enhanced UART | Full-duplex with automatic address recognition and framing error detection-reduces host-side protocol overhead in multi-drop RS-485 networks. |
| Low-power operation | Idle mode (peripherals active, CPU halted) and Power-down mode (oscillator stopped, RAM retained) extend battery life in portable instrumentation. |
Applications
| Motor Control System | Industrial PLC I/O Module |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation using feedback from optical encoder and real-time PWM output. IC Role / Device Role / Timing Role: Central controller executing PID algorithm, generating variable-duty-cycle PWM via PCA channels, and processing quadrature encoder inputs. Use Value: 32 KB Flash stores complex control logic and calibration tables; 6-clock mode delivers 20 MHz timing resolution for 100 kHz PWM carrier frequency. | Use Scenario: Standalone digital I/O expansion node communicating over RS-485 with main PLC controller. IC Role / Device Role / Timing Role: Protocol handler and I/O scheduler managing 32 discrete inputs/outputs with timestamped event logging. Use Value: Enhanced UART with automatic address recognition reduces software overhead; 512 B RAM buffers serial command queue and status history. |
| Legacy Equipment Retrofit | Embedded Data Logger |
Use Scenario: Replacing obsolete 87C51 OTP microcontrollers in aging test equipment without PCB redesign. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement preserving existing PDIP-40 footprint and 5 V logic levels. Use Value: Identical pinout and 80C51 instruction set ensure zero firmware changes; ISP enables post-deployment calibration updates. | Use Scenario: Battery-powered environmental sensor node recording temperature/humidity every 10 seconds for 72 hours. IC Role / Device Role / Timing Role: Low-power supervisor managing ADC sampling, Flash data storage, and wake-up scheduling via Timer 2. Use Value: Power-down mode draws <10 µA; internal RAM retains buffer state across sleep cycles; IAP allows firmware patching in field. |
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 |
|---|---|---|---|
| AT89C51RD2-24PU | 64 KB Flash, 1 KB RAM, same PDIP-40 package; lacks PCA module and 6-clock mode flexibility. | Better for code-intensive applications requiring large firmware; unsuitable for multi-channel PWM or high-resolution timing tasks. | Select when maximum Flash capacity is critical and PCA/peripheral clock independence is not required. |
| P89V51RD2BN/01 | Same 64 KB Flash/1 KB RAM as AT89C51RD2 but adds PCA and 6/12-clock modes; manufactured by NXP as successor. | Direct functional upgrade path from P89C51RC2BN/01 with expanded memory and identical peripheral feature set. | Choose for future-proofing where higher Flash density and backward-compatible enhancements are needed. |
Compared with AT89C51RD2-24PU and P89V51RD2BN/01, the P89C51RC2BN/01 offers optimal balance of 32 KB Flash, full PCA capability, and 6-clock timing for cost-sensitive motor control and retrofit designs-while avoiding over-specification in memory or pin count.
Availability
P89C51RC2BN/01 is available at Aetrix Electronics and suitable for motor control systems, industrial I/O modules, legacy equipment retrofits, and embedded data loggers requiring stable component supply and long-term manufacturing continuity.
Supply support for P89C51RC2BN/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 secure, scalable solutions for automotive, industrial, IoT, and communication infrastructure markets.
The P89C51RC2BN/01 belongs to NXP's legacy 80C51 Flash microcontroller family, designed specifically for cost-effective, high-reliability embedded control in industrial automation and motor drive applications where proven architecture and long-term availability are essential.
FAQ
What is the default clock mode for P89C51RC2BN/01 after chip erase?
The P89C51RC2BN/01 defaults to 12-clock mode after ChipErase. This means each machine cycle requires 12 oscillator periods, supporting up to 33 MHz operation. The 6-clock mode must be explicitly enabled via Flash bit FX2 programming or SFR bit X2 (CKCON.0) during runtime. The P89C51RC2BN/01 datasheet confirms this behavior in the DEVICE COMPARISON TABLE and OSCILLATOR CHARACTERISTICS section.
Does P89C51RC2BN/01 support in-application programming (IAP) without external hardware?
Yes, P89C51RC2BN/01 supports full IAP using ROM-resident low-level Flash programming routines. The user application can erase and reprogram Flash sectors while executing from RAM or protected Flash regions-enabling remote firmware updates over UART or other interfaces. No external programmer or debug interface is required for IAP functionality in the P89C51RC2BN/01.
Which pins on P89C51RC2BN/01 support PWM output?
P89C51RC2BN/01 supports PWM output on P1.3 (CEX0), P1.4 (CEX1), P1.5 (CEX2), P1.6 (CEX3), and P1.7 (CEX4) via its five-channel Programmable Counter Array (PCA). Each channel operates independently with configurable duty cycle and frequency. These pins are defined in the PIN DESCRIPTIONS table and block diagram for the P89C51RC2BN/01.
Can P89C51RC2BN/01 operate from a 3.3 V supply?
No, P89C51RC2BN/01 is specified only for 4.5–5.5 V operation per the ORDERING INFORMATION table and ELECTRICAL CHARACTERISTICS section. It is not 3.3 V tolerant. Attempting 3.3 V operation may result in unreliable Flash programming, reduced noise immunity, or failure to meet timing specifications. For 3.3 V designs, consider modern NXP LPC800 series or migrate to P89V51RD2BN/01 with verified 3.3 V variants.
Is there a built-in boot loader for serial programming of P89C51RC2BN/01?
Yes, P89C51RC2BN/01 includes a factory-programmed boot loader in ROM that enables serial In-System Programming (ISP) via UART without requiring any user code in Flash. This loader supports baud rates up to 115.2 kbps and handles Flash sector erasure, byte/word programming, and verification-making the P89C51RC2BN/01 field-upgradable using only a simple serial interface.
P89C51RC2BN/01,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
P89C51RC2BN/01,112 FAQ
1.How can I place an order for P89C51RC2BN/01,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89C51RC2BN/01,112 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 P89C51RC2BN/01,112 reliable?
The price and inventory of P89C51RC2BN/01,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89C51RC2BN/01,112 is usually 5 days.
3.What payment methods are accepted for P89C51RC2BN/01,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89C51RC2BN/01,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89C51RC2BN/01,112?
P89C51RC2BN/01,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89C51RC2BN/01,112 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 P89C51RC2BN/01,112?
For technical support, including P89C51RC2BN/01,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89C51RC2BN/01,112 requirements.
6.How does Aetrix verify that P89C51RC2BN/01,112 is sourced from the original manufacturer or authorized distributors?
All P89C51RC2BN/01,112 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 P89C51RC2BN/01,112 meets industry standards.
7.What is the process for return or replacement of P89C51RC2BN/01,112?
All P89C51RC2BN/01,112 units undergo pre-shipment inspection (PSI). If there is an issue with P89C51RC2BN/01,112, 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 P89C51RC2BN/01,112 part is unused and in its original packaging.
Return procedure for P89C51RC2BN/01,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P89C51RC2BN/01,112 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
