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NXP Semiconductors P89LPC920FDH,529
- Part No.:
- P89LPC920FDH,529
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
P89LPC920FDH,529.pdf
- Description:
- IC MCU 8BIT 2KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,010
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Product details
Overview
P89LPC920FDH from NXP Semiconductors (formerly Philips) is a 2 kB Flash, 256-byte RAM, 8-bit microcontroller based on an accelerated two-clock 80C51 core operating up to 18 MHz, with integrated I²C, UART, two 16-bit timers, real-time clock, and dual analog comparators - deployed in low-cost industrial control and sensor interface modules.
For engineers reviewing the P89LPC920FDH datasheet, P89LPC920FDH pinout, P89LPC920FDH application, or P89LPC920FDH equivalent, key selection criteria include its 2.4–3.6 V supply range, 5 V-tolerant I/Os, TSSOP20 package, factory-calibrated ±1% RC oscillator, and support for in-application Flash programming without external components.
Technical Context
The P89LPC920FDH executes instructions in two to four CPU clocks - six times faster than standard 80C51 at the same frequency - using a dual-cycle architecture with machine cycles defined as two CCLK periods. Its clock system supports four selectable sources: internal RC (7.373 MHz ±1%), watchdog oscillator (400 kHz), external crystal (20 kHz–18 MHz), or external clock input.
Peripherals are synchronized to PCLK (CCLK/2) and include a fractional baud rate UART, 400 kHz I²C bus, programmable port configurations (quasi-bidirectional, open-drain, push-pull), and keypad interrupt pattern matching on Port 0. The device integrates power management features including Idle mode, two Power-down modes (1 µA typical), brownout reset, and software-controlled reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Accelerated two-clock 80C51 CPU; executes most instructions in 2–4 CCLK cycles, enabling 111–222 ns instruction timing at 18 MHz. |
| Flash Memory | 2 kB user-programmable Flash with 1 kB erasable sectors and 64-byte page erase - supports in-application reprogramming and secure code protection. |
| RAM | 256-byte on-chip data RAM - sufficient for real-time sensor buffering and small control loop variables without external memory. |
| Operating Voltage | 2.4 V to 3.6 V VDD - enables direct battery operation (e.g., two AA cells); I/O pins tolerate up to 5.5 V, simplifying level-shifting in mixed-voltage systems. |
| Max Clock Frequency | 18 MHz system clock - delivers six times the throughput of legacy 80C51 at same frequency, reducing EMI via lower required clock rates for equivalent performance. |
| Package | TSSOP20 (SOT360-1), 4.4 mm body width - surface-mount compatible with high-density PCB layouts and automated assembly. |
| Temperature Range | −40 °C to +85 °C - qualified for industrial environments including motor control panels and building automation nodes. |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20 leads, 4.4 mm body width, 0.65 mm lead pitch. Pin functions validated per Philips Semiconductors P89LPC920/921/922/9221 Rev. 08 datasheet Figures 2 and Table 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - KBI0/CMP2/P0.0 | Port 0 bit 0 / Comparator 2 output / Keypad input 0 | Multi-function I/O with Schmitt trigger input; supports wake-up on keypad press or comparator threshold crossing. |
| 2 - P1.7 | Configurable I/O / High-current source (20 mA) | Programmable as quasi-bidirectional, open-drain, or push-pull; capable of directly driving LEDs or small relays. |
| 3 - P1.6 | Configurable I/O / High-current source (20 mA) | Same configuration flexibility as P1.7; used for status indicators or active-low control signals. |
| 4 - RST/P1.5 | Active-low reset input / Port 1 bit 5 (input only) | External reset path; must be enabled via Flash configuration when operating above 12 MHz. |
| 5 - VSS | Ground reference | 0 V return for all digital and analog circuitry; requires low-impedance connection to minimize noise coupling. |
| 6 - XTAL1/P3.1 | Oscillator input / Port 3 bit 1 | Crystal/resonator input pin; functions as general-purpose I/O only when internal RC or watchdog oscillator is selected. |
| 7 - CLKOUT/XTAL2/P3.0 | Oscillator output / Clock divider output | Provides CCLK/2 clock signal to external peripherals when crystal oscillator is disabled - configurable via TRIM register ENCLK bit. |
| 8 - INT1/P1.4 | External interrupt 1 / Configurable I/O | Rising/falling edge-triggered interrupt source; supports fast response to fault conditions or event inputs. |
| 9 - SDA/INT0/P1.3 | I²C data / External interrupt 0 / Open-drain I/O | Open-drain structure enables wired-AND bus topology; dual-role simplifies interrupt-driven sensor polling. |
| 10 - SCL/T0/P1.2 | I²C clock / Timer 0 input / Open-drain I/O | Drives I²C clock line; also accepts external count pulses for event timing or frequency measurement. |
| 11 - P1.1/RXD | UART receiver input / Configurable I/O | Full-duplex serial communication; Schmitt trigger ensures robust noise immunity on noisy industrial lines. |
| 12 - P1.0/TXD | UART transmitter output / Configurable I/O | Drives RS-232/RS-485 transceivers or TTL-level debug interfaces; slew-rate controlled to reduce EMI. |
| 13 - P0.7/T1/KBI7 | Port 0 bit 7 / Timer 1 input / Keypad input 7 | Supports external event counting or overflow output; enables 8-key matrix scanning with hardware pattern match detection. |
| 14 - P0.6/CMP1/KBI6 | Comparator 1 output / Keypad input 6 | Direct analog threshold detection output; eliminates need for external comparator in voltage monitoring circuits. |
| 15 - VDD | Power supply | Primary 2.4–3.6 V supply rail; powers CPU, peripherals, and I/O drivers; decoupling capacitor required near pin. |
| 16 - P0.5/CMPREF/KBI5 | Comparator reference input / Keypad input 5 | Accepts external or internal reference voltage for precise analog window detection across multiple sensors. |
| 17 - P0.4/CIN1A/KBI4 | Comparator 1 positive input A / Keypad input 4 | One of two selectable inputs per comparator; enables differential or single-ended sensing configurations. |
| 18 - P0.3/CIN1B/KBI3 | Comparator 1 positive input B / Keypad input 3 | Second comparator input channel; allows flexible routing of analog signals from multiplexed sensor arrays. |
| 19 - P0.2/CIN2A/KBI2 | Comparator 2 positive input A / Keypad input 2 | Independent comparator channel supporting simultaneous dual-threshold monitoring (e.g., overvoltage + undervoltage). |
| 20 - P0.1/CIN2B/KBI1 | Comparator 2 positive input B / Keypad input 1 | Completes dual-comparator input set; enables redundant safety checks or multi-zone environmental sensing. |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates in live systems without removing the P89LPC920FDH from the board - critical for remote field upgrades and calibration adjustments. |
| Factory-Calibrated RC Oscillator | 7.373 MHz ±1% accuracy at room temperature eliminates need for external crystal, reducing BOM cost and board space in cost-sensitive applications. |
| 5 V-Tolerant I/O Pins | Allows direct interfacing with legacy 5 V logic, sensors, and displays without level shifters - simplifies integration into mixed-voltage industrial subsystems. |
| Keypad Interrupt Pattern Match | Port 0 generates interrupt when pin states match a programmable 8-bit pattern - enables zero-CPU-overhead keypress detection in HMI designs. |
| Controlled Slew Rate Outputs | ~10 ns minimum ramp time on all port outputs reduces electromagnetic interference during switching - improves EMC compliance in noisy environments. |
| Low-Power Power-down Mode | 1 µA typical current consumption (with comparators disabled) extends battery life in always-on sensor nodes and portable instrumentation. |
Applications
| Industrial Sensor Node | Smart Thermostat Controller |
|---|---|
Use Scenario: Standalone temperature/humidity sensor node with local LED status and I²C-connected environmental sensors. IC Role / Device Role / Timing Role: Primary MCU executing sensor polling, ADC emulation via comparator thresholds, and UART-based diagnostics. Use Value: Integrated comparators replace external op-amps; 2 kB Flash accommodates sensor fusion algorithms and OTA update stack within tight cost constraints. |
Use Scenario: Residential HVAC controller managing relay outputs, rotary encoder input, and LCD display backlight dimming. IC Role / Device Role / Timing Role: Real-time system controller coordinating heating/cooling cycles, user interface responsiveness, and RTC-based scheduling. Use Value: Built-in real-time clock eliminates external RTC IC; 20 mA drive capability on P1.6/P1.7 directly powers display LEDs without discrete drivers. |
| LED Lighting Dimmer Module | Small-Appliance Motor Control |
Use Scenario: DALI-compatible LED driver with PWM dimming, thermal foldback, and addressable communication. IC Role / Device Role / Timing Role: PWM generator (via Timer 0/1), I²C master for configuration, and UART for commissioning. Use Value: Two independent 16-bit timers configured as PWM outputs enable precise dimming control; 5 V-tolerant I/O simplifies interface to DALI bus transceivers. |
Use Scenario: Brushless DC fan controller with hall-effect commutation feedback, overcurrent protection, and soft-start sequencing. IC Role / Device Role / Timing Role: Timing-critical motor commutation sequencer using Timer 1 overflow interrupts and external interrupt inputs for hall sensor edges. Use Value: Dedicated external interrupt inputs (INT0/INT1) provide sub-microsecond response to rotor position changes; low-power modes extend standby efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP P89LPC921FDH | 4 kB Flash, identical pinout and peripheral set - no change to PCB or firmware architecture required. | Supports larger control algorithms, additional communication stacks (e.g., Modbus RTU), or extended data logging buffers. | Select when firmware size exceeds 2 kB or future scalability is required without hardware redesign. |
| Microchip PIC16F1823-I/SL | 14-pin SOIC, 3.5 kB Flash, different architecture (RISC), no native I²C master mode - requires firmware rewrite and layout revision. | Better analog integration (10-bit ADC, 4-channel CWG), but lacks real-time clock and keypad interrupt pattern match. | Consider only for new designs prioritizing analog precision over legacy compatibility or low-latency keypad response. |
Compared with P89LPC920FDH, the P89LPC921FDH offers immediate Flash headroom with zero hardware impact, while the PIC16F1823-I/SL trades 80C51 compatibility for enhanced analog features at the cost of architectural divergence and peripheral gaps in RTC and keypad handling.
Availability
P89LPC920FDH is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, LED lighting dimmer modules, and small-appliance motor control systems requiring stable component supply and long-term manufacturability.
Supply support for P89LPC920FDH 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 P89LPC920FDH belongs to the LPC900 family of enhanced 80C51 microcontrollers designed specifically for cost-sensitive, low-power embedded control where integration, reliability, and ease of migration from legacy 8051 platforms are critical.
FAQ
What is the maximum operating frequency of the P89LPC920FDH?
The P89LPC920FDH supports a maximum system clock frequency of 18 MHz. At this rate, its accelerated two-clock 80C51 core achieves instruction cycle times of 111 ns to 222 ns - six times faster than a standard 80C51 running at the same clock speed. This enables higher throughput in time-critical control loops without increasing EMI emissions.
Does the P89LPC920FDH support in-system programming?
Yes, the P89LPC920FDH supports both serial Flash programming for in-circuit production coding and in-application programming (IAP) that allows modifying Flash code while the device is running. This capability enables field firmware updates and dynamic calibration without requiring device removal or external programmers.
Can the P89LPC920FDH operate without an external crystal?
Yes, the P89LPC920FDH includes a factory-calibrated internal RC oscillator (7.373 MHz ±1%) that operates without external components. This option is selected via Flash configuration bits and eliminates the need for crystals or resonators in cost-sensitive or space-constrained designs.
What is the purpose of the keypad interrupt pattern match feature on the P89LPC920FDH?
The P89LPC920FDH's Port 0 supports hardware-based pattern matching: it generates an interrupt when the logical state of its eight pins matches or does not match a user-defined 8-bit value. This offloads key matrix scanning from firmware, enabling ultra-low-power wake-up and responsive human-machine interfaces without continuous polling.
Is the P89LPC920FDH pin-compatible with other members of the LPC92x family?
Yes, the P89LPC920FDH shares identical TSSOP20 pinout and electrical characteristics with P89LPC921FDH, P89LPC922FDH, and P89LPC9221FDH. All variants use the same SOT360-1 package and support drop-in replacement - only Flash size (2 kB vs. 4 kB vs. 8 kB) and high-drive I/O capability differ between models.
P89LPC920FDH,529 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- LPC900
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 18MHz
- Connectivity:
- I2C, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LED, POR, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 2KB (2K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P89LPC920FDH,529 FAQ
1.How can I place an order for P89LPC920FDH,529 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89LPC920FDH,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 P89LPC920FDH,529 reliable?
The price and inventory of P89LPC920FDH,529 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89LPC920FDH,529 is usually 5 days.
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Once your P89LPC920FDH,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 P89LPC920FDH,529?
For technical support, including P89LPC920FDH,529 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89LPC920FDH,529 requirements.
6.How does Aetrix verify that P89LPC920FDH,529 is sourced from the original manufacturer or authorized distributors?
All P89LPC920FDH,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 P89LPC920FDH,529 meets industry standards.
7.What is the process for return or replacement of P89LPC920FDH,529?
All P89LPC920FDH,529 units undergo pre-shipment inspection (PSI). If there is an issue with P89LPC920FDH,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 P89LPC920FDH,529 part is unused and in its original packaging.
Return procedure for P89LPC920FDH,529:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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