NXP Semiconductors MC68LK332ACAG16

Overview

MC68LK332ACAG16 from Freescale Semiconductor (formerly Motorola) is a 32-bit modular microcontroller featuring the CPU32 core, System Integration Module (SIM), Time Processor Unit (TPU), Queued Serial Module (QSM), and 2-Kbyte TPURAM. It operates at 16 MHz with −40°C to +85°C industrial temperature range, uses a 132-pin PQFP package, and supports motion control applications requiring deterministic real-time I/O timing.

For engineers reviewing the MC68LK332ACAG16 datasheet, MC68LK332ACAG16 pinout, MC68LK332ACAG16 application, or MC68LK332ACAG16 equivalent, this page delivers verified technical context, validated pin functions, confirmed TPU channel count and clock architecture, exact package mapping, and two rigorously cross-checked alternative parts for industrial embedded control designs.

Technical Context

The MC68LK332ACAG16 implements a fully static CPU32 core with virtual memory support and background debugging mode, interfacing via a standardized 24-bit address/16-bit data intermodule bus (IMB). Its SIM includes PLL-based clock synthesis, programmable chip selects, watchdog and bus monitors, and dual-function I/O ports (PE, PF, PC).

The dedicated TPU contains 16 independent, software-configurable channels with bidirectional TPUCH[15:0] pins, two timer count registers with prescalers, and selectable priority levels-enabling precise waveform generation, input capture, and PWM without CPU intervention. The QSM integrates SCI and QSPI submodules on shared PQS[7:0] pins.

Key Specifications

Pinout & Package

MC68LK332ACAG16 is housed in a 132-pin Plastic Quad Flat Package (PQFP) with 0.65 mm lead pitch and standard JEDEC MO-140 footprint. Pin assignments match the MC68332 family's 132-pin QFP configuration as documented in Figure 2 of MC68332TS/D Rev. 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit industrial microcontroller applications.

Compared with MC68LK332ACAG16, MC68332CFC16 offers lower cost but reduced clock accuracy, while MC68332GCFC16 delivers faster motion-control firmware integration at higher unit cost-making MC68LK332ACAG16 the balanced choice for high-reliability industrial systems requiring both precision and flexibility.

Availability

MC68LK332ACAG16 is available at Aetrix Electronics and suitable for industrial motion control, automated test equipment, power supply monitoring, and factory automation PLC applications requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for MC68LK332ACAG16 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

Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in embedded processing solutions, specializing in automotive, industrial, and networking microcontrollers.

The MC68332 family-including MC68LK332ACAG16-was designed specifically for deterministic real-time control in motion, power, and instrumentation systems, emphasizing hardware offload, industrial temperature resilience, and long-term manufacturability.

FAQ

What is the package type and pin count for MC68LK332ACAG16?

MC68LK332ACAG16 uses a 132-pin Plastic Quad Flat Package (PQFP) with 0.65 mm lead pitch, matching the standard MC68332 132-pin QFP footprint documented in Figure 2 of MC68332TS/D Rev. 2. This package supports surface-mount assembly and is compatible with industrial reflow profiles. The pinout includes dedicated TPUCH[15:0], PQS[7:0], and PE/PC/PF I/O banks, all electrically validated per Motorola's original characterization.

Does MC68LK332ACAG16 include an integrated PLL clock synthesizer?

Yes, MC68LK332ACAG16 incorporates a PLL-based clock synthesizer within its System Integration Module (SIM). It accepts a 32.768 kHz crystal on XTAL/EXTAL or an external clock source, and generates the 16 MHz system clock with factory-trimmed stability. The PLL supports runtime frequency changes without data corruption due to the CPU32's fully static design-confirmed in Section 3.3 "System Clock" of MC68332TS/D Rev. 2.

How many TPU channels does MC68LK332ACAG16 support, and what are their capabilities?

MC68LK332ACAG16 supports 16 independent TPU channels accessible via TPUCH[15:0] pins. Each channel can be individually programmed for input capture, output compare, PWM generation, quadrature decoding, or pulse-width measurement-without CPU intervention. This capability is implemented in dedicated TPU hardware, enabling deterministic sub-microsecond timing resolution essential for motor control and encoder interfacing.

Is MC68LK332ACAG16 pin-compatible with other MC68332 variants?

Yes, MC68LK332ACAG16 is pin-compatible with all MC68332 132-pin PQFP variants (e.g., MC68332CFC16, MC68332GCFC16), sharing identical mechanical dimensions, pad layout, and signal mapping per Figure 2 of MC68332TS/D Rev. 2. Electrical compatibility is maintained across the family, though functional differences (e.g., PPWA enhancement, TPU microcode) require firmware verification during substitution.

What is the role of TPURAM in MC68LK332ACAG16, and how much memory does it provide?

MC68LK332ACAG16 includes 2 Kbytes of on-chip TPURAM that can be configured either as general-purpose static RAM for data storage or as TPU microcode emulation RAM for extended TPU instruction sets. This dual-mode memory is mapped at $YFFA00–$YFF9FF and is accessed via the intermodule bus-providing zero-wait-state performance critical for real-time control loops and buffer-intensive serial protocols.