MC68LK332ACAG16 - 32-Bit CPU32 MCU 16.78MHz | NXP | Industrial Control
MPN： MC68LK332ACAG16 ✗ 停產MC68LK332ACAG16 概覽
A 32-bit microcontroller integrates a CPU, memory and peripheral subsystems on a single die, sitting within the broader microcontroller hierarchy of embedded processors. The MC68332 family was among the first highly-integrated 32-bit MCUs, built from standard modules that interface through a common Intermodule Bus (IMB), a predecessor concept to today's AMBA-style bus fabrics.
Key features include the CPU32 core with 32-bit data manipulation capability, a system integration module (SIM) handling clock generation, external bus control and system protection, the TPU providing 16 independent time-function channels for PWM, input capture and timing tasks without CPU load, and the QSM combining a queued serial peripheral interface (QSPI) with a serial communications interface (SCI). Being ROMless, program code executes from external memory over the 16-bit external bus, making it ideal for development and applications that must field-update firmware.
The 16.78 MHz operating frequency delivers deterministic real-time performance, and the external bus interface supports a range of SRAM, EPROM and flash devices. The IMB architecture allows modular extension with additional peripheral modules in the M683xx family.
Typical applications include industrial automation controllers, automotive body and powertrain systems (the family is AEC-Q100 qualified per distributor data), motor control systems, test instrumentation, and telecom line-card management, where the TPU offloads precise multi-channel timing.
Design consideration: because the part is ROMless, budget external memory access cycles into worst-case timing calculations, and verify 5V supply rails since this is a 5V device incompatible with 3.3V-only systems.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pricing shown is as of 2026-10-18.
直接替換替代品，適用於 MC68LK332ACAG16 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC68LK332ACAG16 （相同外形與佔位） — 差異在於 Package, Program Memory Type, Supply Voltage, Architecture, Bus Architecture.
MC68332ACAG16
✅ 直接替換📋 參考替代品（不在目錄中）
MC68LK332GCAG16
✅ 直接替換聯絡詢價
查看資料表 →MC68332GCAG16
✅ 直接替換📋 參考替代品（不在目錄中）
MC68332ACAG20
✅ 直接替換📋 參考替代品（不在目錄中）
MC68332GCAG20
✅ 直接替換📋 參考替代品（不在目錄中）
MC68LK332ACAG16 最大額定值與電氣特性
| Core Processor | CPU32 (M683xx) |
| Core Size | 32-Bit |
| Max Clock Frequency | 16.78 MHz |
| Program Memory Type | ROMless (external memory) |
| RAM Size | 2 KB |
| Peripherals | TPU, QSM (QSPI + SCI), SIM |
| 供應電壓 | 5 V |
| 封裝 | 144-LQFP (20x20 mm) |
| 安裝類型 | Surface Mount |
| Connectivity | QSPI, SCI (UART) |
| Bus Architecture | Intermodule Bus (IMB) |
| External Bus Interface | External data/address bus for ROMless operation |
| Qualification | AEC-Q100 (per distributor listing) |
| RoHS 狀態 | Compliant |
| 生命週期狀態 | End of Life (per NXP product page) |
| Programmability | Not verified / Programmable (external code) |
MC68LK332ACAG16 144-lqfp (20x20 mm) 腳位配置指南
MC68LK332ACAG16（144-lqfp (20x20 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC68LK332ACAG16.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC68LK332ACAG16 適用於 6 應用s: Industrial Automation Controllers, Automotive Powertrain and Body Control, Motor Control Systems, Test and Measurement Instrumentation, Telecom Line-Card Management, Embedded Firmware Development Platforms.
Industrial Automation Controllers
The MC68LK332ACAG16 fits industrial automation controllers because its CPU32 core at 16.78 MHz delivers deterministic real-time response, while the Time Processing Unit offloads up to 16 independent timing channels - PWM generation, input capture and output compare - without CPU intervention. In a PLC or machine controller, the QSM's QSPI interface scans analog and digital I/O expansion devices while the SCI handles operator terminal links. Being ROMless, the external bus allows firmware stored in flash to be field-updated on installed equipment, a key advantage for long-lived industrial assets. Designers must budget external memory access cycles into worst-case loop timing, since program fetches traverse the external bus. The 5V supply matches legacy industrial I/O voltage levels directly.
推薦
Automotive Powertrain and Body Control
The MC68332 family, including the MC68LK332ACAG16, carries AEC-Q100 qualification per distributor listings, making it suitable for legacy automotive powertrain and body-control module service. The TPU's 16 channels natively generate crank/cam-synchronized PWM, injection pulses and stepper outputs with microsecond precision, while the QSM's SCI links diagnostic tools. Its 5V I/O directly drives period automotive sensor and actuator thresholds. For service continuity of vehicles still using these modules, the MC68LK332ACAG16 restores functionality without board redesign; the same-family drop-ins (MC68332ACAG16, GCAG16 grades) cover alternate screening grades. For new automotive designs, NXP recommends modern families such as SPC5, since this part is End of Life and no active pin-compatible successor exists.
推薦
Motor Control Systems
Motor drives benefit directly from the MC68LK332ACAG16's TPU, which generates multi-channel complementary PWM with dead-time-capable precision at 16.78 MHz, and captures encoder or hall-sensor edges in hardware for speed feedback. Because the TPU runs its own microengine, commutation timing does not degrade when the CPU32 executes control-loop math or SCI communications. The 2 KB SRAM holds loop state, with code in external flash. The 5V interface simplifies connection to gate-driver logic of that era. Designers should verify worst-case external bus latency so that fault-protection routines meet shutdown deadlines, and consider the 20 MHz MC68332ACAG20 drop-in when more computational headroom is needed within the same footprint.
推薦
Test and Measurement Instrumentation
Bench and rack instruments use the MC68LK332ACAG16's deterministic CPU32 core plus QSPI to sequence ADCs, DACs and programmable gain stages over a queued serial link with minimal CPU overhead, while the SCI provides host communication. The IMB architecture and external bus let instruments embed calibration tables and application firmware in flash, updated in the field. The 16 TPU channels implement precise interval timing for counter/timer functions. Because the part is ROMless and 5V-only, instrument designs retain external memory and 5V logic planes - straightforward for service of existing hardware but not recommended for new instruments. Same-package 20 MHz grades offer faster sweep timing without PCB changes, subject to remaining stock.
推薦
Telecom Line-Card Management
Legacy telecom line cards used the MC68LK332ACAG16 as a board-management controller: the QSM's QSPI polls line-interface devices, power monitors and EEPROM, while the SCI reports status to the shelf controller over a serial backplane link. The TPU provides timing for alarm supervision and pulse-metering functions. Its ROMless external-bus architecture allowed operators to load firmware images at provisioning or upgrade time - valuable in carrier equipment with long service lives. The 5V rail matched the telecom board's legacy logic domain. For boards still in service, the same-footprint family variants simplify spares pooling; however, given End-of-Life status, sparing quantities should be secured now, and new line-card designs should adopt active MCUs.
推薦
Embedded Firmware Development Platforms
Because the MC68LK332ACAG16 is ROMless, it was the natural choice for MC68332-family development and prototyping: code resides in external EPROM or flash that can be erased and reprogrammed through the debug cycle, and the BDM-style debug path of the CPU32 family supports source-level debugging. The SIM's chip-select and bus-control features simplify bring-up of custom external memory maps. Universities and legacy teams maintaining CPU32 toolchains use this part to run unmodified production code while profiling timing with the TPU channels as trace markers. Engineers beginning new development should not choose this EOL device; instead, modern NXP MCUs with active lifecycle status and current IDE support are recommended.
推薦
推薦產品摘要
工程參考資料，適用於 MC68LK332ACAG16 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC68332ACAG16 | MC68LK332GCAG16 | MC68332GCAG16 | MC68332ACAG20 |
|---|---|---|---|---|---|
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same |
| Brand | NXP Semiconductors (Freescale legacy) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | CPU32, 32-bit | CPU32, 32-bit | CPU32, 32-bit | CPU32, 32-bit | CPU32, 32-bit |
| Max Clock Frequency | 16.78 MHz | 16 MHz class | 16.78 MHz class | 16 MHz class | 20 MHz |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) |
| Peripherals | TPU, QSM, SIM | TPU, QSM, SIM | TPU, QSM, SIM | TPU, QSM, SIM | TPU, QSM, SIM |
| Lifecycle Status | End of Life | EOL (family-wide) | EOL (family-wide) | EOL (family-wide) | EOL (family-wide) |
主要差異化特點
- Highest speed grade of the ROMless 16 MHz family members (對比MC68332ACAG16)
- Trade-off: lower speed than 20 MHz grades (對比MC68332ACAG20)
- Grade flexibility within the same footprint (對比MC68LK332GCAG16)
設計說明
The MC68LK332ACAG16 is a 5V-only device. Do not connect 3.3V memories or peripherals directly to its bus - use level translators or select 5V-tolerant components. Estimated: at 16.78 MHz with external bus activity, supply current is in the tens-of-mA range typical for 5V CMOS of this era; size the 5V regulator for the external memory plus MCU load with margin. Place 0.1 uF decoupling capacitors at each supply pin pair of the 144-LQFP plus bulk 10 uF near the regulator.
ROMless operation means every instruction fetch crosses the external bus. Verify that external flash/SRAM access-time specifications (including SIM wait states) close timing at 16.78 MHz with your clock configuration - slow memory requires wait-state programming in the SIM chip-select registers. Also, because the part is End of Life, design-in of this device in new products is strongly discouraged; NXP recommends migrating to the MCX A Series for new designs.
Lay out the 20x20 mm 144-LQFP with short, matched traces on the external address/data bus. Keep clock (EXTAL/XTAL) traces away from bus lines and use the crystal layout guidelines in the NXP MC68332 user manual: crystal close to the pins, guard with ground, series resistor per datasheet drive-level requirements. Provide solid ground plane under the bus; add series termination (estimated 22-33 ohm, verify by signal-integrity simulation) on fast bus lines to control ringing on 5V CMOS edges.
合規資訊
AEC-Q100 qualification noted in Arrow distributor listing for the family. RoHS/lead-free status reflected on distributor listings; REACH and halogen-free status not stated in provided data.
