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NXP Semiconductors P89LPC901FD,112
- Part No.:
- P89LPC901FD,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
P89LPC901FD,112.pdf
- Description:
- IC MCU 8BIT 1KB FLASH 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
P89LPC901FD,112 from NXP Semiconductors (formerly Philips) is an 8-bit microcontroller based on a two-clock 80C51 core, delivering six times the instruction throughput of standard 80C51 devices at the same frequency. It integrates 1 kB byte-erasable Flash code memory, 128-byte RAM, two 16-bit timers, a 23-bit system timer usable as RTC, and a single analog comparator - all in an 8-pin SO-8 package for compact embedded control in cost-sensitive applications such as smart sensors and low-pin-count industrial interfaces.
For engineers reviewing the P89LPC901FD,112 datasheet, P89LPC901FD,112 pinout, P89LPC901FD,112 application, or P89LPC901FD,112 equivalent, key selection considerations include its 2.4–3.6 V operation with 5 V-tolerant I/Os, internal RC oscillator calibrated to ±1 %, programmable port output modes (quasi-bidirectional/open-drain/push-pull), and support for In-Application Programming (IAP-Lite) enabling non-volatile data storage in Flash.
Technical Context
The P89LPC901FD,112 executes instructions in two to four clocks, achieving 111–222 ns cycle times at 18 MHz - six times faster than legacy 80C51 cores. Its architecture includes a dedicated on-chip RC oscillator with factory calibration and fine-tuning capability, independent watchdog timer with selectable prescaler (8 values), and power monitoring with brownout detect configurable as interrupt or reset.
It supports four interrupt priority levels, keypad interrupt inputs (two dedicated KBI pins), port input pattern match detection on Port 0, and LED drive capability (20 mA per pin, total chip-limited). All I/O pins feature Schmitt-triggered inputs and controlled slew rate (~10 ns min ramp time) to reduce EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Two-clock 80C51 CPU executing instructions in 2–4 cycles; delivers 6× performance vs standard 80C51 at same clock frequency. |
| Memory | 1 kB byte-erasable Flash (256-byte sectors, 16-byte pages) + 128-byte RAM; supports IAP-Lite for firmware updates and non-volatile data storage. |
| Operating Voltage | 2.4 V to 3.6 V VDD with 5.5 V-tolerant I/O pins; enables direct interfacing with 5 V logic without level shifters. |
| Timers & Clock | Two 16-bit counter/timers (Timer 0 configurable as PWM or toggle output); 23-bit system timer usable as real-time clock; internal RC oscillator (±1 % factory-calibrated, 20 kHz–18 MHz). |
| Peripherals | Single analog comparator (CMPREF/CIN1A inputs); two keypad interrupt inputs (KBI4/KBI5); watchdog timer with independent oscillator; low-voltage reset with interrupt option. |
| Power Modes | Idle and two Power-down modes; typical Power-down current is 1 µA (with comparators disabled); wake-up via low-level interrupt input. |
| Package | SO-8 (SOT96-1), 7.5 mm body width; industry-standard pinout with VDD (pin 1), VSS (pin 8), and RST (pin 4). |
Pinout & Package
Package: Plastic small outline package; 8 leads; body width 7.5 mm (SOT96-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 8) | Ground reference | 0 V return path for all internal circuits and I/O; must be connected to system ground plane for stable operation. |
| P0.4/CIN1A/KBI4 (Pin 7) | Port 0 bit 4 / Comparator 1 positive input / Keypad input 4 | Configurable I/O supporting analog comparator function or keyboard scan; Schmitt-triggered input for noise immunity. |
| P0.5/CMPREF/KBI5 (Pin 6) | Port 0 bit 5 / Comparator reference (negative) input / Keypad input 5 | Dual-role pin for comparator reference voltage or keypad sensing; enables single-supply comparator operation with internal reference. |
| P1.2/T0 (Pin 5) | Port 1 bit 2 / Timer 0 external count input or overflow output | Supports external event counting or generates PWM/toggle signal on overflow; programmable output mode (quasi-bidirectional/open-drain). |
| VDD (Pin 1) | Power supply | Primary supply for core and I/O; operates from 2.4 V to 3.6 V; powers internal RC oscillator and reset circuitry. |
| XTAL1/P3.1 (Pin 2) | CPU clock input / Port 3 bit 1 | Accepts external crystal/resonator when selected via Flash configuration; functions as GPIO if internal RC oscillator is used. |
| CLKOUT/XTAL2/P3.0 (Pin 3) | CPU clock output / Crystal oscillator output / Port 3 bit 0 | Provides divided-by-2 CPU clock (ENCLK enabled) or crystal drive signal; usable as system clock source for external peripherals. |
| RST/P1.5 (Pin 4) | Active-low reset input / Port 1 bit 5 (input only) | Resets processor and peripherals on LOW; also forces ISP mode during power-on; requires external hold circuit above 12 MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| Byte-erasable Flash memory | Enables use of Flash for both code and non-volatile data storage without sector-level erasure overhead. |
| Internal RC oscillator (±1 %) | Eliminates need for external crystal/resonator in cost-sensitive designs while maintaining timing accuracy for UART and RTC functions. |
| Programmable port output types | Quasi-bidirectional, open-drain, push-pull, and input-only modes per pin allow optimal drive strength and bus compatibility. |
| Port input pattern match detection | Generates interrupt when Port 0 pins match or mismatch a user-defined 8-bit pattern - ideal for low-power keypad wake-up. |
| Controlled slew rate outputs | ~10 ns minimum ramp time reduces electromagnetic interference in dense PCB layouts without requiring external RC snubbers. |
| 5 V-tolerant I/O pins | Allows direct connection to legacy 5 V logic families and sensors without level-shifting components, simplifying mixed-voltage systems. |
Applications
| Smart Sensor Node | Industrial Keypad Interface |
|---|---|
|
Use Scenario: Compact environmental sensor node measuring temperature/humidity with local threshold-based alerting and LED indication. IC Role / Device Role / Timing Role: Primary controller executing sensor polling, analog comparator-based threshold detection, and LED drive (20 mA per pin). Use Value: Single-chip solution eliminates external comparator, reset IC, and crystal - reducing BOM count and board area in sub-10 mm² designs. |
Use Scenario: 5-button industrial HMI panel with debounce, wake-on-keypress, and serial status reporting. IC Role / Device Role / Timing Role: Keypad scanner using KBI4/KBI5 and Port 0 pattern match; generates interrupt on key press to exit Power-down mode (1 µA). Use Value: Low-power wake-up capability and integrated keypad interrupt logic eliminate external scan controller and reduce active time by >95%. |
| Low-Cost Power Monitor | Embedded Timer Module |
|
Use Scenario: AC mains monitor detecting brownout events and triggering graceful shutdown of downstream DC loads. IC Role / Device Role / Timing Role: System supervisor using built-in brownout detect (BOPD), watchdog timer, and 23-bit system timer for elapsed-time logging. Use Value: On-chip power monitoring replaces discrete reset IC and external timer, enabling Class II isolation-compliant designs without auxiliary supplies. |
Use Scenario: Standalone 24-hour countdown timer for HVAC control with LED display multiplexing and button interface. IC Role / Device Role / Timing Role: Real-time clock source using 23-bit system timer; drives 7-segment LEDs via quasi-bidirectional port pins. Use Value: Internal RTC eliminates external 32.768 kHz crystal and associated load capacitors, cutting component count and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P89LPC902FD,112 | Includes dual analog comparators (CMP1/CMP2) and additional KBI inputs (KBI0/KBI2/KBI6), but lacks XTAL1/XTAL2 pins and CLKOUT functionality. | Preferred for dual-threshold sensing (e.g., over/under-voltage detection) where crystal-less operation is acceptable. | Select P89LPC902FD,112 when dual comparator inputs and extra keypad lines outweigh need for external clock source or debug clock output. |
| P89LPC903FD,112 | Adds UART (TxD/RxD), removes XTAL1/XTAL2, and retains single comparator; no CLKOUT or T0 PWM capability. | Suitable for serial communication tasks (e.g., Modbus RTU slave) where analog comparison is secondary to host connectivity. | Choose P89LPC903FD,112 when UART interface is required and external crystal is unnecessary - but verify absence of T0 PWM affects timing-critical functions. |
Compared with P89LPC902FD,112 and P89LPC903FD,112, the P89LPC901FD,112 uniquely balances external crystal support, CLKOUT visibility, T0 PWM capability, and single-comparator functionality - making it optimal for timing-critical, crystal-referenced control applications where UART or dual comparators are not required.
Availability
P89LPC901FD,112 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial keypad interfaces, low-cost power monitors, and embedded timer modules requiring stable component supply across extended temperature ranges (−40 °C to +85 °C).
Supply support for P89LPC901FD,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 (originally Philips Semiconductors) is a global leader in high-performance mixed-signal ICs, with expertise in secure connectivity, automotive, and industrial microcontrollers.
The P89LPC901FD,112 belongs to the LPC900 family of ultra-low-pin-count 8-bit MCUs designed for cost-sensitive, space-constrained embedded control - emphasizing integration of timing, power management, and interface functions into minimal-footprint packages.
FAQ
What is the maximum operating frequency of the P89LPC901FD,112?
The P89LPC901FD,112 supports a maximum CPU clock frequency of 18 MHz. At this rate, instruction cycle times range from 111 ns to 222 ns (excluding multiply/divide), delivering six times the throughput of standard 80C51 cores. The internal RC oscillator is factory-calibrated to ±1 % across this range, and external crystal operation up to 18 MHz is supported via XTAL1/XTAL2 pins.
Does the P89LPC901FD,112 support in-system programming?
Yes, the P89LPC901FD,112 supports In-Application Programming (IAP-Lite) and Serial Flash In-Circuit Programming (ICP). IAP-Lite allows runtime reprogramming of Flash memory - including use of Flash sectors for non-volatile data storage - while ICP enables simple production coding using commercial EPROM programmers. Flash security bits prevent unauthorized readout of application code.
Can the P89LPC901FD,112 operate without an external crystal?
Yes, the P89LPC901FD,112 includes a high-accuracy internal RC oscillator selectable via Flash configuration bits, supporting frequencies from 20 kHz to 18 MHz. Factory calibration ensures ±1 % accuracy, eliminating the need for external crystal or resonator in most timing applications - including UART baud generation and real-time clock operation.
What are the power supply requirements for the P89LPC901FD,112?
The P89LPC901FD,112 operates from a single 2.4 V to 3.6 V VDD supply, with VSS referenced to 0 V. Its I/O pins are 5 V tolerant (up to 5.5 V), allowing safe interfacing with 5 V logic without level shifters. The device includes low-voltage reset (brownout detect) that can be configured as either a reset signal or interrupt, ensuring reliable operation during supply transients.
How many interrupt sources does the P89LPC901FD,112 support?
The P89LPC901FD,112 supports four interrupt priority levels and multiple interrupt sources including Timer 0/1 overflow, external INT0/INT1 (mapped to P1.2/T0 and RST/P1.5), keypad interrupts (KBI4/KBI5), comparator flag, and power-fail interrupt. Interrupt enable and priority registers (IEN0/IEN1, IP0/IP1) provide granular control over masking and nesting behavior in real-time applications.
P89LPC901FD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- LPC900
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 18MHz
- Connectivity:
- -
- Peripherals:
- Brown-out Detect/Reset, LED, POR, PWM, WDT
- Number of I/O:
- 6
- Program Memory Size:
- 1KB (1K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 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:
P89LPC901FD,112 FAQ
1.How can I place an order for P89LPC901FD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89LPC901FD,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 P89LPC901FD,112 reliable?
The price and inventory of P89LPC901FD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89LPC901FD,112 is usually 5 days.
3.What payment methods are accepted for P89LPC901FD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89LPC901FD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89LPC901FD,112?
P89LPC901FD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89LPC901FD,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 P89LPC901FD,112?
For technical support, including P89LPC901FD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89LPC901FD,112 requirements.
6.How does Aetrix verify that P89LPC901FD,112 is sourced from the original manufacturer or authorized distributors?
All P89LPC901FD,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 P89LPC901FD,112 meets industry standards.
7.What is the process for return or replacement of P89LPC901FD,112?
All P89LPC901FD,112 units undergo pre-shipment inspection (PSI). If there is an issue with P89LPC901FD,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 P89LPC901FD,112 part is unused and in its original packaging.
Return procedure for P89LPC901FD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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