NXP Semiconductors P89LPC9211FDH,112

Overview

P89LPC9211FDH,112 from NXP Semiconductors is a 4 kB flash, 8-bit accelerated 2-clock 80C51 microcontroller in TSSOP20 package, operating from 2.4 V to 3.6 V with 5 V-tolerant I/Os. It integrates dual 16-bit timers, real-time clock, enhanced UART with fractional baud rate, 400 kHz I²C, watchdog timer with on-chip oscillator, and programmable port configurations - deployed in industrial sensor nodes and low-power embedded control systems.

For engineers reviewing the P89LPC9211FDH,112 datasheet, P89LPC9211FDH,112 pinout, P89LPC9211FDH,112 application, or P89LPC9211FDH,112 equivalent, key selection criteria include flash size (4 kB), 20-pin TSSOP package with 15+ I/Os, 18 MHz max clock, brownout detection, and In-System Programming capability for field firmware updates.

Technical Context

The P89LPC9211FDH,112 executes instructions in two to four clocks-six times faster than standard 80C51 at same frequency-enabling 111–222 ns instruction cycles at 18 MHz. Its architecture supports dynamic clock switching among internal RC oscillator (with doubler), watchdog oscillator, and external crystal sources for optimized power/performance trade-offs.

It features a 23-bit system timer (7-bit prescaler + 16-bit counter) usable as real-time clock, two analog comparators with selectable inputs and reference, and configurable port output modes (quasi-bidirectional, open-drain, push-pull). All I/O pins include Schmitt triggers and support keypad interrupt pattern matching on Port 0.

Key Specifications

Pinout & Package

Package: TSSOP20 (SOT360-1), plastic thin shrink small outline package, 20 leads, 4.4 mm body width.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with P89LPC9201FDH and P89LPC922A1FDH, the P89LPC9211FDH,112 delivers optimal balance of code space (4 kB), cost, and upgrade path-making it ideal for mid-complexity embedded control where memory scalability matters but 8 kB is excessive.

Availability

P89LPC9211FDH,112 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, keypad-controlled HMIs, and embedded power supply monitors requiring stable component supply across multi-year production cycles.

Supply support for P89LPC9211FDH,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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The P89LPC92X1 family was designed for cost-sensitive, low-power embedded control applications requiring high integration, robust I/O, and field-programmable flash-targeting industrial automation, building controls, and consumer electronics.

FAQ

What is the maximum operating frequency of the P89LPC9211FDH,112?

The P89LPC9211FDH,112 supports a maximum operating frequency of 18 MHz. This applies whether using an external crystal/resonator or the internal RC oscillator with clock doubler enabled. At 18 MHz, instruction cycle times range from 111 ns to 222 ns-six times faster than standard 80C51 devices running at the same clock speed. The P89LPC9211FDH,112 maintains full functionality across its entire 0–18 MHz range.

Does the P89LPC9211FDH,112 support In-Application Programming (IAP)?

Yes, the P89LPC9211FDH,112 supports In-Application Programming of its 4 kB flash memory. This allows firmware to modify its own code while running-enabling dynamic updates, parameter storage in flash, and bootloader implementations. IAP is implemented via dedicated SFRs (FMCON, FMDATA, FMADRH/L) and requires proper sector/page addressing and erase-before-write sequencing as defined in the user manual.

How many I/O pins does the P89LPC9211FDH,112 provide in its TSSOP20 package?

The P89LPC9211FDH,112 provides 18 usable I/O pins in the TSSOP20 package when using on-chip oscillator and reset options. This includes all 8 bits of Port 0, 7 bits of Port 1 (P1.5 is input-only RST), and both bits of Port 3. Pins P1.2 and P1.3 default to open-drain for I²C, but can be reconfigured as general-purpose I/O with appropriate SFR settings.

Is the P89LPC9211FDH,112 compatible with 5 V logic interfaces?

Yes, the P89LPC9211FDH,112 features 5 V-tolerant I/O pins-meaning all port pins (except VDD and VSS) can be safely pulled up to or driven by 5.5 V signals while operating from a 2.4–3.6 V supply. This eliminates level-shifting circuitry when interfacing with legacy 5 V peripherals, sensors, or communication buses-simplifying design and reducing board area.

What development tools support the P89LPC9211FDH,112?

The P89LPC9211FDH,112 is supported by NXP's LPC900 series toolchain, including Flash Magic for ISP programming, Keil µVision for C compilation and debugging, and third-party JTAG emulators compatible with the 80C51 architecture. Evaluation boards such as the OM13002 (LPC93x starter kit) provide hardware reference for UART, I²C, ADC, and power management validation of the P89LPC9211FDH,112.