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NXP Semiconductors P89C669FA-S
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- Part No.:
- P89C669FA-S
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P89C669FA-S.pdf
- Description:
- IC MCU 8BIT 96KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,382
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Product details
Overview
P89C669FA-S from NXP Semiconductors (formerly Philips Semiconductors) is an 8-bit 51MX-core microcontroller designed for embedded control applications requiring extended memory addressing and in-system programmability. It integrates 96 kB Flash program memory, 2 kB on-chip SRAM, two enhanced UARTs, a byte-based Fast I²C interface (400 kbit/s), and a five-channel Programmable Counter Array (PCA). It operates at up to 24 MHz with 6-clock-cycle machine cycles and supports industrial temperature range (−40 °C to +85 °C).
For engineers reviewing the P89C669FA-S datasheet, P89C669FA-S pinout, P89C669FA-S application, or P89C669FA-S equivalent, this device serves as a high-memory, binary-compatible upgrade path from legacy 80C51 systems-enabling C-language development beyond 64 kB code space while retaining full toolchain and peripheral compatibility.
Technical Context
The P89C669FA-S implements the 51MX core-a fully static, accelerated 80C51 derivative with 23-bit linear program and data address spaces (up to 8 MB each), 23-bit program counter, 16-bit stack pointer, and dual 24-bit universal pointers optimized for C compiler efficiency. Its architecture preserves 100% binary compatibility with classic 80C51 code and bus timing.
It features In-System Programming (ISP) via UART using an on-chip ROM bootloader and In-Application Programming (IAP) using ROM-resident routines, enabling remote firmware updates without external programmers. Flash endurance is rated at ≥10,000 erase/program cycles with 10-year data retention, and security bits support three levels of firmware protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 51MX - accelerated 80C51 with 2× instruction throughput vs standard 80C51 |
| Max Clock Frequency | 24 MHz - enables real-time control with 6-clock-cycle machine cycle |
| Flash Memory | 96 kB - organized in twelve 8 kB blocks with Block Erase (1 s) and Chip Erase (1 s) |
| RAM | 2 kB on-chip SRAM - supports extended stack depth and large data buffers |
| I/O Pins | 32 bidirectional I/O lines across four ports - includes alternate functions for PCA, I²C, UART, timers |
| Serial Interfaces | Two full-duplex enhanced UARTs + byte-based Fast I²C (400 kbit/s) - supports multi-protocol communication |
| Power Modes | Idle and Power-down modes - reduces current consumption during standby without losing RAM contents |
Pinout & Package
Package: PLCC44 (SOT187-2), 44-pin plastic leaded chip carrier with gull-wing leads, suitable for socketed or surface-mount applications requiring mechanical robustness and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 / AD0–AD7 | Open-drain bidirectional I/O; multiplexed low-order address/data bus for external memory access |
| P1.0–P1.7 | Port 1 / T2, T2EX, ECI, CEX0–CEX2, SCL, SDA | Dedicated PCA capture/compare I/O, I²C clock/data, and Timer2 control signals |
| P2.0–P2.7 | Port 2 / A8–A15, A16–A22 | Bidirectional I/O; outputs high-order address bits (A8–A22) during extended memory accesses |
| P3.0–P3.7 | Port 3 / RXD0, TXD0, INT0, INT1, CEX3/T0, CEX4/T1, WR, RD | Standard 80C51 function pins plus PCA channel 3/4 I/O and external memory strobes |
| RST | Reset Input | Active-HIGH reset requiring ≥2 machine cycles; internal pull-down permits power-on reset with external capacitor |
| EA/VPP | External Access Enable / Programming Voltage | Latched at reset; HIGH selects internal Flash, LOW enables external program memory (up to 8 MB) |
| XTAL1/XTAL2 | Oscillator Inputs | Supports crystal (1–24 MHz) or external clock source; drives internal 6-cycle-per-instruction timing generator |
| VDD / VSS / (NC/VDD) / (NC/VSS) | Power & Ground | Dual VDD/VSS pairs improve noise immunity and EMI performance; NC pins internally tied to VDD/VSS |
Key Features
| Feature | Design Value |
|---|---|
| 23-bit address space | Enables direct access to up to 8 MB program and 8 MB data memory - eliminates bank switching in C applications |
| In-Application Programming (IAP) | Allows self-reprogramming of Flash during runtime using ROM-resident routines - enables over-the-air firmware updates |
| Programmable Counter Array (PCA) | Five independent capture/compare modules support PWM generation, input capture, software timers, and pulse-width measurement |
| Fast I²C interface | 400 kbit/s byte-mode operation with automatic address recognition and framing error detection - simplifies sensor and peripheral interfacing |
| Four-level interrupt priority | Supports nested interrupt handling with configurable priority per source - improves real-time responsiveness in multitask environments |
Applications
| Industrial PLC I/O Module | Smart Energy Meter |
|---|---|
Use Scenario: Real-time monitoring and control of discrete inputs/outputs in DIN-rail mounted automation hardware. IC Role / Device Role / Timing Role: Primary controller executing ladder logic and serial protocol stacks (Modbus RTU/ASCII) with deterministic timing. Use Value: 96 kB Flash accommodates complex protocol stacks and calibration tables; PCA channels generate precise PWM for LED status indicators and drive solenoid timing. |
Use Scenario: Bidirectional energy measurement with tariff switching, tamper detection, and RS-485 communication. IC Role / Device Role / Timing Role: Main MCU managing metrology IC interface, EEPROM logging, LCD driver, and secure firmware updates. Use Value: IAP enables field firmware patches without hardware rework; dual UARTs support simultaneous meter reading and diagnostics; 2 kB RAM buffers time-slice energy data. |
| Embedded HMI Controller | Legacy System Upgrade Platform |
Use Scenario: Local operator interface with touch panel, buzzer, and relay control in medical or building equipment. IC Role / Device Role / Timing Role: Standalone UI processor handling button debouncing, display refresh, audio feedback, and safety interlocks. Use Value: 32 I/O lines directly drive LEDs, relays, and keypad matrix; Fast I²C interfaces with capacitive touch controller and EEPROM; idle mode reduces standby power. |
Use Scenario: Drop-in replacement for aging 80C51-based controllers in production equipment with minimal PCB changes. IC Role / Device Role / Timing Role: Binary-compatible drop-in MCU preserving existing assembly/C code, peripherals, and debug infrastructure. Use Value: Full 80C51 instruction and bus compatibility ensures zero firmware porting effort; extended memory allows future feature expansion without redesign. |
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 | 8051 core with 64 kB Flash, 2 kB RAM, ISP via UART; lacks 51MX extended addressing and PCA | Suitable for cost-sensitive 64 kB-limited designs; no native support for >64 kB C code or 23-bit pointers | Select when memory extension and advanced timer features are unnecessary and legacy Atmel toolchain is preferred. |
| P89V51RD2FA | Same 51MX core, 64 kB Flash, 1 kB RAM, identical PLCC44 package; shares boot ROM loader and IAP architecture | Lower memory capacity limits complex protocol stacks; reduced RAM constrains buffer-intensive tasks like TCP/IP offload | Select for pin-compatible migration where 64 kB Flash suffices and BOM rationalization is prioritized. |
Compared with AT89C51ED2-RLTUM and P89V51RD2FA, the P89C669FA-S delivers unique value through its 96 kB Flash, 23-bit addressing, and five-channel PCA-making it the only option among the three capable of supporting full-featured C-based firmware with extended memory mapping and multi-channel timing control without external glue logic.
Availability
P89C669FA-S is available at Aetrix Electronics and suitable for industrial automation, smart metering, embedded HMI, and legacy system upgrade programs requiring stable component supply, long lifecycle support, and verified Flash reliability.
Supply support for P89C669FA-S 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 (formerly Philips Semiconductors) is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The P89C669FA-S belongs to NXP's legacy 80C51-based microcontroller family, engineered to extend the life and capability of 8051-based designs with memory expansion, modern programming models (ISP/IAP), and enhanced peripherals-without abandoning proven development ecosystems.
FAQ
What is the maximum operating frequency of the P89C669FA-S?
The P89C669FA-S supports a maximum CPU clock frequency of 24 MHz with a 6-clock-cycle machine cycle, delivering twice the instruction throughput of standard 80C51 devices. This enables deterministic real-time response in control loops and serial protocol handling. The oscillator circuit accepts crystals from 1 MHz to 24 MHz or external clock sources, and timing-critical peripherals like UARTs and PCA remain fully functional across the full range. The P89C669FA-S datasheet specifies AC characteristics up to 24 MHz under industrial temperature conditions.
Does the P89C669FA-S support In-System Programming (ISP) without external hardware?
Yes, the P89C669FA-S supports UART-based In-System Programming (ISP) using a default serial loader stored in on-chip ROM. This eliminates the need for external programmers: users can download new firmware directly via UART0 or UART1 using standard terminal commands. The P89C669FA-S requires only a 3.3 V or 5 V level shifter and no additional voltage programming supplies (e.g., 12 V), making field updates simple and reliable. The ROM bootloader is active on power-up if the EA pin is held HIGH and no valid user code executes the jump vector.
How does the P89C669FA-S handle memory addressing beyond 64 kB?
The P89C669FA-S implements the 51MX core with 23-bit linear program and data address spaces, enabling direct access to up to 8 MB of memory without banking. Addressing uses extended pointers (EPTR), dual DPTR registers, and MX-specific instructions (prefixed with opcode A5h). The P89C669FA-S supports MOVX @ EPTR for 23-bit external data access and expands the program counter to 23 bits-allowing C compilers to generate position-independent code that scales beyond 64 kB while maintaining full 80C51 source compatibility.
What are the key differences between the P89C669FA-S and the P89V51RD2FA?
The P89C669FA-S offers 96 kB Flash and 2 kB RAM versus 64 kB Flash and 1 kB RAM in the P89V51RD2FA; both share the same 51MX core, PLCC44 package, and ISP/IAP architecture. The P89C669FA-S adds a fifth PCA channel (CEX4), extended SFRs for 23-bit addressing, and enhanced security bit options. These differences make the P89C669FA-S suitable for larger firmware images and more complex timing applications, while the P89V51RD2FA remains viable for cost-optimized 64 kB-limited implementations.
Can the P89C669FA-S operate in low-power modes, and how is wake-up managed?
Yes, the P89C669FA-S supports Idle and Power-down modes. In Idle mode, the CPU stops but peripherals (UARTs, PCA, timers, interrupts) remain active; wake-up occurs via any enabled interrupt or hardware reset. In Power-down mode, the oscillator halts and all clocks stop except the watchdog timer (if enabled); wake-up requires external interrupt or hardware reset. Both modes retain full SRAM and SFR contents. The P89C669FA-S achieves sub-10 µA standby current in Power-down mode with watchdog disabled, making it suitable for battery-backed applications.
P89C669FA-S 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:
- 24MHz
- Connectivity:
- I2C, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K 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:
P89C669FA-S FAQ
1.How can I place an order for P89C669FA-S through Aetrix?
Please submit a Request for Quotation (RFQ) for P89C669FA-S 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 P89C669FA-S reliable?
The price and inventory of P89C669FA-S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89C669FA-S is usually 5 days.
3.What payment methods are accepted for P89C669FA-S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89C669FA-S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89C669FA-S?
P89C669FA-S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89C669FA-S 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 P89C669FA-S?
For technical support, including P89C669FA-S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89C669FA-S requirements.
6.How does Aetrix verify that P89C669FA-S is sourced from the original manufacturer or authorized distributors?
All P89C669FA-S 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 P89C669FA-S meets industry standards.
7.What is the process for return or replacement of P89C669FA-S?
All P89C669FA-S units undergo pre-shipment inspection (PSI). If there is an issue with P89C669FA-S, 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 P89C669FA-S part is unused and in its original packaging.
Return procedure for P89C669FA-S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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