NXP Semiconductors P89LPC930FDH,129

Overview

P89LPC930FDH,129 from NXP Semiconductors (formerly Philips) is an 8-bit microcontroller based on a two-clock 80C51 core, delivering 6× performance over standard 80C51 at 18 MHz with 4 kB Flash, 256-byte RAM, and 23 I/O pins in TSSOP28 package. It integrates dual 16-bit timers, real-time clock, two analog comparators, enhanced UART, I²C, SPI, and keypad interrupt support for compact embedded control applications.

For engineers reviewing the P89LPC930FDH,129 datasheet, P89LPC930FDH,129 pinout, P89LPC930FDH,129 application, or P89LPC930FDH,129 equivalent, this page provides verified functional specifications, validated TSSOP28 pin mapping, confirmed low-voltage operation (2.4–3.6 V), 5 V-tolerant I/Os, and real-world use cases in industrial sensing and power management systems.

Technical Context

The P89LPC930FDH,129 executes instructions in two to four CPU clocks-enabling 111 ns minimum instruction cycle time at 18 MHz-via an accelerated 2-clock architecture. Its clock system supports four selectable sources: factory-calibrated 7.373 MHz ±1% on-chip RC oscillator, watchdog oscillator (400 kHz), external crystal (20 kHz–18 MHz), or external clock input.

Peripherals include a fractional baud rate UART, 400 kHz I²C bus, full-duplex SPI, eight keypad-interrupt-capable Port 0 pins, and dual analog comparators with programmable reference and inputs. All 23 I/O pins feature Schmitt-trigger inputs, LED drive capability (20 mA/pin), and configurable output modes (quasi-bidirectional, open-drain, push-pull, input-only).

Key Specifications

Pinout & Package

Package: TSSOP28 (SOT361-1), plastic thin shrink small outline package with 28 leads and 4.4 mm body width. Pinout validated per Philips Semiconductors Rev. 05 datasheet (15 Dec 2004), Figure 2 and Table 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with P89LPC930FDH,129, the P89LPC931FDH offers double Flash capacity with zero hardware changes, while the LPC935FDH provides higher clock headroom and modernized debug-but requires firmware validation and lacks factory RC calibration guarantee.

Availability

P89LPC930FDH,129 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart power monitors, keypad-based HMIs, and embedded I²C master nodes requiring stable component supply across long-lifecycle production programs.

Supply support for P89LPC930FDH,129 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 acquired Philips Semiconductors in 2006 and continues to support legacy 80C51-based microcontrollers with documentation, tools, and long-term supply assurance.

The P89LPC930FDH,129 belongs to the LPC900 family-designed for cost-sensitive, space-constrained embedded control applications demanding high integration, low power, and minimal external components.

FAQ

What is the maximum operating frequency of the P89LPC930FDH,129?

The P89LPC930FDH,129 supports a maximum CPU clock frequency of 18 MHz when using the high-speed oscillator option (external crystal or resonator). At this frequency, its two-clock architecture achieves 111 ns minimum instruction cycle time-six times faster than a standard 80C51 running at the same clock rate. The on-chip RC oscillator is factory calibrated to 7.373 MHz ±1%, but can be tuned via the TRIM register for other frequencies.

Does the P89LPC930FDH,129 support in-system programming?

Yes, the P89LPC930FDH,129 supports both serial flash programming for in-circuit production coding and In-Application Programming (IAP) of its 4 kB Flash memory. This allows firmware updates to be performed while the device is running in the target system. Flash security bits prevent unauthorized reading of sensitive code, and erase/program operations complete in 2 ms each-enabling rapid field updates without removing the P89LPC930FDH,129 from the board.

How many I/O pins does the P89LPC930FDH,129 provide in TSSOP28 package?

The P89LPC930FDH,129 provides a minimum of 23 configurable I/O pins in its TSSOP28 package. When using on-chip oscillator and on-chip reset options, up to 26 pins are available as I/O-since XTAL1, XTAL2, and RST functions are reassigned from dedicated pins to general-purpose I/O. All pins feature Schmitt-triggered inputs, LED drive capability (20 mA), and user-selectable output configurations (quasi-bidirectional, open-drain, push-pull, or input-only).

Can the P89LPC930FDH,129 operate from a 5 V supply?

No, the P89LPC930FDH,129 operates from a 2.4 V to 3.6 V VDD supply and is not rated for 5 V operation. However, all I/O pins are 5 V tolerant-meaning they may be safely pulled up to or driven by 5 V signals without damage. This allows direct interfacing with legacy 5 V peripherals (e.g., sensors, displays, logic) while maintaining the microcontroller's low-voltage core operation for reduced power and EMI.

What oscillator options are available for the P89LPC930FDH,129?

The P89LPC930FDH,129 supports four oscillator options: (1) on-chip RC oscillator (factory trimmed to 7.373 MHz ±1%), (2) on-chip watchdog oscillator (400 kHz), (3) external crystal/resonator (20 kHz–18 MHz), and (4) external clock input (0–18 MHz applied to XTAL1/P3.1). Selection is configured via Flash configuration bits during programming; the RC option eliminates external timing components, while crystal modes support precise timing-critical applications.