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NXP Semiconductors P89LV51RC2BN,112
- Part No.:
- P89LV51RC2BN,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
P89LV51RC2BN,112.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,213
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Product details
Overview
P89LV51RC2BN,112 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 32 kB on-chip flash program memory, 1 kB data RAM, 3 V operation (0–33 MHz), X2 mode for 6-clock-per-machine-cycle execution, and integrated SPI, enhanced UART, PCA with PWM/capture/compare, and programmable watchdog timer. It targets industrial control, sensor interface, and legacy 8051-based embedded systems requiring field firmware updates via ISP/IAP.
For engineers reviewing the P89LV51RC2BN,112 datasheet, P89LV51RC2BN,112 pinout, P89LV51RC2BN,112 application, or P89LV51RC2BN,112 equivalent, key selection criteria include flash size (32 kB), operating voltage (3 V), temperature range (−40 °C to +85 °C), TQFP44 package compatibility, and support for in-system programming and in-application programming without external hardware.
Technical Context
The P89LV51RC2BN,112 implements a standard 80C51 CPU core with dual clock modes: default 12-clock and selectable 6-clock (X2) mode-achieving double instruction throughput at identical crystal frequency or halving clock frequency for EMI reduction. Its memory architecture includes two flash blocks: Block 0 (32 kB user code) and Block 1 (IAP/ISP routines), with bank selection controlled by SWR and BSEL bits in FCF register.
It integrates a 5-channel Programmable Counter Array (PCA) supporting PWM generation, input capture, and software timers; three 16-bit timers/counters; four 8-bit I/O ports with three high-current (16 mA) pins on Port 1; and brownout detection at 2.35 V. The device supports both parallel programming and serial ISP, and enables IAP-reconfiguring flash while application code runs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 80C51 CPU - fully compatible with legacy 8051 toolchains and instruction set. |
| Flash Memory | 32 kB - sufficient for medium-complexity firmware with bootloader, application, and parameter storage. |
| Data RAM | 1024 B - supports stack, variables, and buffers for real-time control tasks without external RAM. |
| Clock Modes | 12- or 6-clock per machine cycle - selectable via software or ISP; enables performance scaling or EMI optimization. |
| Operating Voltage | 3 V ±10% - compatible with modern low-voltage power rails and battery-backed systems. |
| Temperature Range | −40 °C to +85 °C - qualified for industrial and automotive under-hood environments. |
| Package | TQFP44 - 10 × 10 × 1.0 mm body, surface-mount compatible, with 0.8 mm lead pitch. |
Pinout & Package
Package: TQFP44 (SOT376-1), plastic thin quad flat package, 44 leads, 10 × 10 × 1.0 mm body, 0.8 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0/AD0 – P0.7/AD7 | Port 0 bidirectional I/O / multiplexed address/data bus | Open-drain port used for external memory access (A0–A7/D0–D7); requires external pull-ups for general-purpose I/O. |
| P1.0/T2 – P1.7/SPICLK/CEX4 | Port 1 with alternate functions | Includes Timer2 I/O (P1.0), PCA channels CEX0–CEX4 (P1.3–P1.7), SPI signals (MOSI/MISO/SPICLK), and ECI clock input (P1.2). |
| P2.0/A8 – P2.7/A15 | Port 2 bidirectional I/O / high-order address bus | Provides A8–A15 during external memory access; internal pull-ups enable use as general-purpose I/O when not addressing. |
| P3.0/RXD – P3.7/RD | Port 3 with serial/peripheral control functions | Includes UART (RXD/TXD), external interrupts (INT0/INT1), timer inputs (T0/T1), and external memory strobes (WR/RD). |
| RST | Reset input | Active-HIGH reset; two machine cycles required for valid reset; also enters external host mode when combined with PSEN transition. |
| EA | External Access Enable | Strapped HIGH for internal flash execution; tied LOW to enable external program memory fetches. |
| ALE/PROG | Address Latch Enable / programming pulse | Latches P0 address during external memory access; serves as PROG pulse during flash programming; disabled in low-EMI mode. |
| XTAL1/XTAL2 | Crystal oscillator inputs | Supports quartz crystals or resonators up to 40 MHz; internal oscillator circuit eliminates need for external clock source. |
Key Features
| Feature | Design Value |
|---|---|
| X2 Mode Execution | Enables 6-clock-per-machine-cycle operation-doubling effective throughput at same crystal frequency or cutting EMI by halving clock speed. |
| In-System Programming (ISP) | Allows firmware reprogramming in final product via UART under software control-eliminating need for dedicated programmers in field updates. |
| In-Application Programming (IAP) | Permits flash memory reconfiguration-including bootloader or parameter updates-while application code continues executing. |
| Programmable Counter Array (PCA) | Five independent channels support PWM generation, input capture, software timers, and high-resolution event timing without CPU overhead. |
| Brownout Detection | Hardware reset triggered at 2.35 V supply threshold-prevents erratic operation and flash corruption during undervoltage conditions. |
| Low-EMI Mode | ALE inhibit function reduces radiated emissions by disabling address latch pulses-critical for EMC-compliant industrial designs. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
|
Use Scenario: Localized closed-loop control of DC brushless motors in HVAC actuators or factory automation panels. IC Role / Device Role / Timing Role: Primary controller executing PID algorithms, generating PWM via PCA channels, and managing UART-based commissioning. Use Value: 32 kB flash accommodates motor control firmware plus safety diagnostics; X2 mode delivers deterministic 10 kHz PWM update rates at 20 MHz crystal. |
Use Scenario: Battery-powered environmental sensor hub aggregating temperature, humidity, and CO₂ readings for wireless transmission. IC Role / Device Role / Timing Role: System-on-chip managing ADC interfacing (via P0 ADx), SPI sensor reads, UART debug, and low-power idle/brownout recovery. Use Value: 3 V operation and power-down mode extend battery life; 1 kB RAM holds sensor buffers and calibration coefficients without external memory. |
| Legacy Equipment Retrofit | Programmable Logic Controller (PLC) I/O Module |
|
Use Scenario: Drop-in replacement for obsolete 8051 variants in medical infusion pumps or test equipment where PCB layout cannot change. IC Role / Device Role / Timing Role: Pin-compatible 80C51 upgrade with identical memory map and interrupt structure-retaining existing firmware with minor linker adjustments. Use Value: Full 8051 instruction set compatibility and TQFP44 footprint allow direct substitution; ISP enables post-deployment calibration updates. |
Use Scenario: DIN-rail mounted digital I/O expansion module communicating via Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol handler and I/O scheduler-processing Modbus frames via enhanced UART, driving opto-isolated outputs via Port 1 high-current pins. Use Value: Three 16 mA Port 1 pins directly drive LEDs or small relays; programmable watchdog ensures fail-safe recovery during communication faults. |
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 | 512 B RAM, 64 kB flash, 5 V operation, no X2 mode, different ISP protocol. | Requires voltage translation for 3 V systems; lacks low-EMI ALE disable and PCA flexibility. | Choose only if 5 V supply and legacy Atmel toolchain compatibility are mandatory. |
| STC89C52RC-PDIP40 | 8 kB flash, 512 B RAM, 5 V operation, no IAP, PLCC40 package. | Insufficient flash for complex protocols; incompatible pinout and voltage prevents drop-in use. | Select only for cost-sensitive, low-feature 5 V designs where ISP suffices and IAP is unnecessary. |
Compared with AT89C51ED2-RLTUM and STC89C52RC-PDIP40, the P89LV51RC2BN,112 provides optimal balance of 32 kB flash, 3 V operation, X2 performance scaling, and full IAP capability-making it uniquely suited for industrial upgrades requiring field-upgradable firmware without hardware redesign.
Availability
P89LV51RC2BN,112 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, legacy equipment retrofit, and PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P89LV51RC2BN,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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in 8051 architecture development.
The P89LV51RC2BN,112 belongs to NXP's legacy 80C51 microcontroller family, designed specifically to extend the life of proven 8051-based systems with modern features like ISP, IAP, and low-voltage operation-without sacrificing toolchain compatibility.
FAQ
What is the maximum operating frequency of the P89LV51RC2BN,112?
The P89LV51RC2BN,112 supports operation up to 33 MHz at 3 V. When using the X2 mode, it achieves twice the instruction throughput of standard 80C51 at the same crystal frequency-enabling effective 66 MHz-equivalent performance without increasing EMI. The device is rated for frequencies up to 40 MHz in extended testing but guarantees 33 MHz operation across −40 °C to +85 °C.
Does the P89LV51RC2BN,112 support in-application programming (IAP)?
Yes, the P89LV51RC2BN,112 fully supports IAP. Its dual-flash-block architecture allows the user application to execute from Block 0 while invoking routines from Block 1 to reprogram flash sectors-including updating itself-without halting operation. This capability is implemented via documented SFR registers (FCF, DPS) and requires no external hardware or debugger connection.
What package type does the P89LV51RC2BN,112 use?
The P89LV51RC2BN,112 uses the TQFP44 package (SOT376-1): a 10 × 10 × 1.0 mm plastic thin quad flat package with 44 leads and 0.8 mm pitch. It is distinct from PLCC44 variants (e.g., P89LV51RB2BA) and requires PCB land patterns compliant with JEDEC MO-220 specifications.
How does the X2 mode affect power consumption and EMI in the P89LV51RC2BN,112?
In X2 mode, the P89LV51RC2BN,112 executes instructions in six clock cycles instead of twelve-allowing either doubled performance at the same frequency or halved crystal frequency for identical throughput. Reducing clock frequency directly lowers dynamic power and radiated EMI, especially critical in noise-sensitive industrial environments where ALE and bus transitions dominate emissions.
Can the P89LV51RC2BN,112 be used as a direct replacement for older 8051 microcontrollers?
The P89LV51RC2BN,112 maintains full 80C51 instruction set and memory map compatibility, making it suitable for retrofitting legacy 8051 designs. However, pin-level compatibility depends on package: the TQFP44 variant matches other TQFP44 8051 derivatives, but differs from DIP40 or PLCC44 footprints. Firmware porting typically requires only minor linker script and clock initialization updates.
P89LV51RC2BN,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- 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:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
P89LV51RC2BN,112 FAQ
1.How can I place an order for P89LV51RC2BN,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89LV51RC2BN,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 P89LV51RC2BN,112 reliable?
The price and inventory of P89LV51RC2BN,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89LV51RC2BN,112 is usually 5 days.
3.What payment methods are accepted for P89LV51RC2BN,112?
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P89LV51RC2BN,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89LV51RC2BN,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 P89LV51RC2BN,112?
For technical support, including P89LV51RC2BN,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89LV51RC2BN,112 requirements.
6.How does Aetrix verify that P89LV51RC2BN,112 is sourced from the original manufacturer or authorized distributors?
All P89LV51RC2BN,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 P89LV51RC2BN,112 meets industry standards.
7.What is the process for return or replacement of P89LV51RC2BN,112?
All P89LV51RC2BN,112 units undergo pre-shipment inspection (PSI). If there is an issue with P89LV51RC2BN,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 P89LV51RC2BN,112 part is unused and in its original packaging.
Return procedure for P89LV51RC2BN,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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