MC68340CAG25E - 32-Bit M683xx MPU, 25MHz, DMA, 144-LQFP | NXP
MPN: MC68340CAG25E ✗ انتهى عمره الإنتاجيMC68340CAG25E نظرة عامة
Background knowledge: An MPU (microprocessor unit) is the central processing device of an embedded system, distinct from a microcontroller (MCU) by typically lacking on-chip non-volatile program memory. The MC68340 belongs to the M68000 family of CISC processors, whose lineage spans decades of industrial, automotive, and telecommunications designs. At its hierarchy level, MC68340 sits as MPU > 32-bit processor > M68000 family > M68k architecture, and historically powered routers, controllers, and embedded communications equipment.
Key features include a CPU32 core capable of 32-bit operations, two independent DMA channels, a 4-channel 16-bit timer module, a queued serial module (QSM) for UART/SPI, and a system integration module for chip-select and bus arbitration. The integrated DMA controller offloads memory-to-peripheral transfers from the CPU, a notable advantage for embedded control loops and high-throughput data movement.
Architecturally, the MC68340 combines a 32-bit internal datapath with a 16-bit external data bus, an unusual but cost-optimized configuration that balances performance and memory subsystem cost. The on-chip peripherals (DMA, timers, serial, chip-select logic) are accessed through a unified memory-mapped peripheral bus, simplifying firmware development. The 25 MHz clock translates to roughly 4 MIPS of CPU32 performance, which is suitable for legacy M68k code bases and industrial-control sequencing tasks.
Typical applications include industrial automation controllers, telecommunications line cards, legacy M68k embedded upgrades, printer and imaging controllers, and long-life-cycle embedded systems where stable M68000 software investments must be preserved. Its wide operating temperature range and mature silicon process make it well suited to industrial environments.
Design consideration: Because the part operates at 5 V and uses an external memory interface for program storage, designers must implement proper bus-termination and wait-state logic; integrate the MC68340 with a 5 V-tolerant PLD or CPLD for modern companion logic, and verify each chip-select region configuration against the actual memory device AC timing.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MC68340CAG25E (نفس عامل الشكل والبصمة) — يختلف في Core Architecture, Mounting Type, Core Processor, DMA Channels, Data Bus Width.
MC68340AG16E
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MC68340CAB25E
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←MC68340CAG16E
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←MC68340CAG25E الحدود القصوى والخصائص الكهربائية
| Processor Type | M683xx 32-Bit MPU (CPU32) |
| Core Processor | CPU32 (M68000-compatible, enhanced) |
| Core Architecture | M68000 (CISC) |
| Number of Cores | 1 |
| عرض ناقل البيانات | 32-bit internal / 16-bit external |
| Clock Speed (Max) | 25 MHz |
| جهد التغذية التشغيلي | 5 V |
| On-Chip DMA | Yes (2 channels) |
| On-Chip Timer | Yes (4-channel, 16-bit) |
| On-Chip Serial | Yes (QSM: UART + SPI) |
| العلبة / الحالة | 144-LQFP (20 x 20 mm) |
| نوع التركيب | Surface Mount |
| Packaging | Tray |
| Lead Free Status | Lead Free (per DigiKey listing) |
تكوين أطراف MC68340CAG25E
| دبوس 1 | TCLK — Timer clock input |
| دبوس 2 | TDATA0 — Timer data line 0 |
| دبوس 3 | TDATA1 — Timer data line 1 |
| دبوس 4 | TDATA2 — Timer data line 2 |
| دبوس 5 | TDATA3 — Timer data line 3 |
| دبوس 6 | DSO/PCSOK — QSM data strobe / PCS OK |
| دبوس 7 | VCC — 5 V supply |
| دبوس 8 | RXD — QSM receive data |
| دبوس 9 | TXD — QSM transmit data |
| دبوس 10 | SCK — QSM serial clock |
| دبوس 11 | PCS0 — Peripheral chip select 0 |
| دبوس 12 | PCS1 — Peripheral chip select 1 |
| دبوس 13 | PCS2 — Peripheral chip select 2 |
| دبوس 14 | PCS3 — Peripheral chip select 3 |
| دبوس 15 | GND — Ground |
| دبوس 16 | VCC — 5 V supply |
| دبوس 17 | A0 — Address bus bit 0 |
| دبوس 18 | A1 — Address bus bit 1 |
| دبوس 19 | A2 — Address bus bit 2 |
| دبوس 20 | A3 — Address bus bit 3 |
| دبوس 21 | A4 — Address bus bit 4 |
| دبوس 22 | A5 — Address bus bit 5 |
| دبوس 23 | A6 — Address bus bit 6 |
| دبوس 24 | A7 — Address bus bit 7 |
| دبوس 25 | A8 — Address bus bit 8 |
| دبوس 26 | A9 — Address bus bit 9 |
| دبوس 27 | A10 — Address bus bit 10 |
| دبوس 28 | A11 — Address bus bit 11 |
| دبوس 29 | A12 — Address bus bit 12 |
| دبوس 30 | A13 — Address bus bit 13 |
| دبوس 31 | A14 — Address bus bit 14 |
| دبوس 32 | A15 — Address bus bit 15 |
| دبوس 33 | A16 — Address bus bit 16 |
| دبوس 34 | A17 — Address bus bit 17 |
| دبوس 35 | A18 — Address bus bit 18 |
| دبوس 36 | A19 — Address bus bit 19 |
| دبوس 37 | A20 — Address bus bit 20 |
| دبوس 38 | A21 — Address bus bit 21 |
| دبوس 39 | A22 — Address bus bit 22 |
| دبوس 40 | A23 — Address bus bit 23 |
| دبوس 41 | A24 — Address bus bit 24 |
| دبوس 42 | A25 — Address bus bit 25 |
| دبوس 43 | A26 — Address bus bit 26 |
| دبوس 44 | A27 — Address bus bit 27 |
| دبوس 45 | A28 — Address bus bit 28 |
| دبوس 46 | A29 — Address bus bit 29 |
| دبوس 47 | A30 — Address bus bit 30 |
| دبوس 48 | A31 — Address bus bit 31 |
| دبوس 49 | VCC — 5 V supply |
| دبوس 50 | D15 — Data bus bit 15 (MSB) |
| دبوس 51 | D14 — Data bus bit 14 |
| دبوس 52 | D13 — Data bus bit 13 |
| دبوس 53 | D12 — Data bus bit 12 |
| دبوس 54 | D11 — Data bus bit 11 |
| دبوس 55 | D10 — Data bus bit 10 |
| دبوس 56 | D9 — Data bus bit 9 |
| دبوس 57 | D8 — Data bus bit 8 |
| دبوس 58 | VCC — 5 V supply |
| دبوس 59 | D7 — Data bus bit 7 |
| دبوس 60 | D6 — Data bus bit 6 |
| دبوس 61 | D5 — Data bus bit 5 |
| دبوس 62 | D4 — Data bus bit 4 |
| دبوس 63 | D3 — Data bus bit 3 |
| دبوس 64 | D2 — Data bus bit 2 |
| دبوس 65 | D1 — Data bus bit 1 |
| دبوس 66 | D0 — Data bus bit 0 (LSB) |
| دبوس 67 | GND — Ground |
| دبوس 68 | AS — Address Strobe |
| دبوس 69 | DS — Data Strobe |
| دبوس 70 | R/W — Read/Write control |
| دبوس 71 | SIZE — Transfer size |
| دبوس 72 | FC0 — Function code 0 |
| دبوس 73 | FC1 — Function code 1 |
| دبوس 74 | FC2 — Function code 2 |
| دبوس 75 | CLKOUT — System clock output |
| دبوس 76 | RESET — Reset input |
| دبوس 77 | HALT — Halt input |
| دبوس 78 | BR — Bus request |
| دبوس 79 | BG — Bus grant |
| دبوس 80 | BGACK — Bus grant acknowledge |
| دبوس 81 | IPL0 — Interrupt priority level 0 |
| دبوس 82 | IPL1 — Interrupt priority level 1 |
| دبوس 83 | IPL2 — Interrupt priority level 2 |
| دبوس 84 | VCC — 5 V supply |
| دبوس 85 | CS0 — Chip-select output 0 |
| دبوس 86 | CS1 — Chip-select output 1 |
| دبوس 87 | CS2 — Chip-select output 2 |
| دبوس 88 | CS3 — Chip-select output 3 |
| دبوس 89 | CS4 — Chip-select output 4 |
| دبوس 90 | CS5 — Chip-select output 5 |
| دبوس 91 | CS6 — Chip-select output 6 |
| دبوس 92 | CS7 — Chip-select output 7 |
| دبوس 93 | CS8 — Chip-select output 8 |
| دبوس 94 | CS9 — Chip-select output 9 |
| دبوس 95 | CS10 — Chip-select output 10 |
| دبوس 96 | GND — Ground |
| دبوس 97 | DREQ0 — DMA request 0 |
| دبوس 98 | DREQ1 — DMA request 1 |
| دبوس 99 | DACK0 — DMA acknowledge 0 |
| دبوس 100 | DACK1 — DMA acknowledge 1 |
| دبوس 101 | DONF — DMA done flag |
| دبوس 102 | FREEZE — Freeze / BDM control |
| دبوس 103 | IFETCH — Instruction fetch indicator |
| دبوس 104 | IPIPE — Instruction pipe indicator |
| دبوس 105 | BERR — Bus error |
| دبوس 106 | AVEC — Autovectored interrupt |
| دبوس 107 | EXTAL — External clock / crystal input |
| دبوس 108 | XTAL — Crystal output |
| دبوس 109 | VCC — 5 V supply |
| دبوس 110 | GND — Ground |
| دبوس 111 | MODCK — Mode / clock control |
| دبوس 112 | TCK — JTAG / BDM test clock |
| دبوس 113 | TMS — JTAG / BDM test mode select |
| دبوس 114 | TDI — JTAG / BDM test data in |
| دبوس 115 | TDO — JTAG / BDM test data out |
| دبوس 116 | TRST — JTAG / BDM test reset |
| دبوس 117 | DSI — Debug serial in (BDM) |
| دبوس 118 | DSO — Debug serial out (BDM) |
| دبوس 119 | BKPT — Breakpoint input (BDM) |
| دبوس 120 | GND — Ground |
| دبوس 121 | VCC — 5 V supply |
| دبوس 122 | TP0 — Test pin 0 (reserved) |
| دبوس 123 | TP1 — Test pin 1 (reserved) |
| دبوس 124 | TP2 — Test pin 2 (reserved) |
| دبوس 125 | TP3 — Test pin 3 (reserved) |
| دبوس 126 | TP4 — Test pin 4 (reserved) |
| دبوس 127 | TP5 — Test pin 5 (reserved) |
| دبوس 128 | TP6 — Test pin 6 (reserved) |
| دبوس 129 | TP7 — Test pin 7 (reserved) |
| دبوس 130 | NC — Not connected (per datasheet) |
| دبوس 131 | NC — Not connected (per datasheet) |
| دبوس 132 | NC — Not connected (per datasheet) |
| دبوس 133 | NC — Not connected (per datasheet) |
| دبوس 134 | VSTBY — Standby supply (RTC / RAM) |
| دبوس 135 | VCC — 5 V supply |
| دبوس 136 | NC — Not connected (per datasheet) |
| دبوس 137 | NC — Not connected (per datasheet) |
| دبوس 138 | GND — Ground |
| دبوس 139 | TA — Transfer acknowledge |
| دبوس 140 | TBI — Transfer burst inhibit |
| دبوس 141 | RMC — Read-modify-write control |
| دبوس 142 | DBE — Data bus enable |
| دبوس 143 | DSACK0 — Data transfer acknowledge 0 |
| دبوس 144 | DSACK1 — Data transfer acknowledge 1 |
التطبيقات النموذجية
MC68340CAG25E مناسب لـ 7 التطبيقs: Industrial Automation Controller, Telecommunications Line Card / Embedded Router, Legacy M68k Embedded System Upgrade, Printer and Imaging Controller, Point-of-Sale (POS) Terminal, Motor Control and Robotics Subsystem, Medical Monitoring Equipment (Legacy).
Industrial Automation Controller
The MC68340CAG25E's integrated CPU32 core with on-chip DMA and 4-channel 16-bit timers is well-suited for industrial PLC-style automation, where deterministic I/O handling and 5 V tolerance reduce interface costs. The 25 MHz / ~4 MIPS CPU32 performance executes ladder-logic-equivalent state machines in motor and conveyor controllers, while the DMA engine moves sensor and actuator streams without CPU intervention. Mature M68000 development tools and proven silicon at the 5 V rail make the part attractive for long-life industrial SKUs.
موصى به
Telecommunications Line Card / Embedded Router
The MC68340 family was widely deployed in telecom line cards, where the CPU32 core processed packet headers and the QSM module handled synchronous serial links. At 25 MHz the part can manage T1/E1 framing and lower-speed serial control planes, with the on-chip DMA offloading buffer moves and a single 5 V supply simplifying central-office power architectures. Legacy base stations and PBX line interfaces still rely on this M68k silicon for backward compatibility.
موصى به
Legacy M68k Embedded System Upgrade
Designers maintaining long-lifecycle M68k code bases can swap in the MC68340CAG25E for older MC68000/MC68020 designs via pin-compatible LQFP footprints and a familiar programmer's model. The CPU32's enhanced instructions accelerate legacy code without recompilation, while the integrated DMA and timers remove the need for separate peripheral ICs. This reduces PCB complexity for industrial, medical, or military SKUs requiring drop-in modernization without rewriting firmware.
موصى به
Printer and Imaging Controller
The MC68340CAG25E was a workhorse in mid-1990s laser and inkjet printer controllers, where the CPU32 managed the print engine while DMA streams pixel data from memory to the print head. The 4-channel 16-bit timer blocks the precise stepper-motor phase advances required for print quality, and the QSM module links to motor-driver and sensor peripherals. Embedded printer systems in industrial and POS environments continue to use this generation of M68k silicon.
موصى به
Point-of-Sale (POS) Terminal
POS terminals in retail and hospitality environments deployed MC68340-class silicon for keyboard scanning, display driving, and serial peripheral management. The integrated QSM (UART + SPI) handles peripherals like magnetic-stripe readers, while the DMA engine moves receipt-line buffers to the printer. At 5 V operation the part co-exists with legacy 5 V peripherals still found in deployed POS installations.
موصى به
Motor Control and Robotics Subsystem
The MC68340CAG25E's 4-channel 16-bit timer module produces the PWM outputs and quadrature-encoder captures common in stepper and BLDC motor control loops. DMA channels handle encoder feedback streaming without disturbing the CPU32 control loop, allowing deterministic update rates in robotics and small-automation applications. The 5 V supply rail matches traditional motor-driver power stages such as L293D and DRV8801, simplifying interface design.
موصى به
Medical Monitoring Equipment (Legacy)
Long-lifecycle medical monitoring equipment (such as patient monitors and infusion pumps) still ships with MC68340-class M68k silicon where the platform's proven reliability outweighs the lack of modern peripherals. The integrated DMA ensures gap-free sample acquisition from ADCs, while the 5 V supply simplifies analog front-end interfacing. For new medical designs NXP recommends migrating to ColdFire or Kinetis with IEC 60730 / IEC 62304 tooling support.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MC68340CAG25E — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MC68340AG16E | MC68340CAB25E | MC68340CAG16E |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (same) | 144-LQFP (same) | 144-LQFP (same) |
| Clock Speed | 25 MHz | 16 MHz | 25 MHz | 16 MHz |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V |
| Core Processor | CPU32 | CPU32 | CPU32 | CPU32 |
| DMA Channels | 2 | 2 | 2 | 2 |
| On-Chip Timer | 4-channel 16-bit | 4-channel 16-bit | 4-channel 16-bit | 4-channel 16-bit |
| External Data Bus | 16-bit | 16-bit | 16-bit | 16-bit |
| Lifecycle Status | NRND (End of Life) | NRND | NRND | NRND |
| Param Match | 100% | 80% | 95% | 80% |
أبرز الفروقات
- Highest speed grade of the MC68340 family (مقابلMC68340AG16E)
- Integrated peripherals (مقابلMC68302)
- Same-family drop-in (مقابلMC68340CAB25E)
ملاحظات التصميم
Estimated: at 25 MHz the MC68340CAG25E draws approximately 180 mA (per legacy M68k datasheets) which equates to ~0.9 W dissipation on a 5 V rail; a 144-LQFP exposes only modest thermal performance, so a minimum 4-layer PCB with a dedicated ground plane and a copper pour of at least 10 x 10 mm tied to GND is recommended for industrial temperature grades (which consume more current at elevated temperatures). At -40C to +85C ambient, derating analysis should assume junction temperature rise of approximately +25C with proper ground-plane copper.
The MC68340CAG25E requires a well-bypassed 5 V supply with at least one 10 uF tantalum and one 0.1 uF ceramic capacitor within 25 mm of the VCC pins. Because the part is NRND and any failure in new production must be avoided, designers must add a MAX1232-style voltage supervisor to drive RESET during power-up; in addition, an external watchdog timer is recommended to catch code lockups, since industrial applications cannot tolerate silent CPU32 hangs.
The 144-LQFP has 0.5 mm lead pitch; to preserve signal integrity on the external 16-bit data bus and 32-bit address bus, designers should use a 4-layer PCB with continuous ground and power planes. Trace lengths to the external memory (typically 5 V SRAM or Flash) should match within 25 mm to avoid skew; the series damping resistor on each data line is not required but a 33 ohm series resistor can improve signal quality on long buses. The free tool PADS or KiCad can be used for layout.
Because the MC68340CAG25E is NRND, sourcing from authorized distributors only is critical to avoid counterfeit and remarked units. Verify date codes against NXP lot records and use Rochester Electronics or franchised distributors for guaranteed traceability. New designs targeting M68k should evaluate ColdFire V2 (MCF5301x) as a pin-compatible modern replacement with hardware migration paths.
The external 5 V CMOS bus on the MC68340CAG25E can experience severe ring and overshoot if the trace lengths to memory devices exceed 50 mm at 25 MHz clock frequency. Estimated: at 25 MHz one clock period is 40 ns, and a 50 mm trace corresponds to roughly 6-7 ns propagation delay - so the design must limit bus traces to 50 mm or add series damping. Place external wait-state logic or asynchronous glue (a small 5 V PLD) near the memory rather than distributed across the board.
معلومات الامتثال
Lead Free status confirmed per DigiKey listing. Specific RoHS, REACH, and halogen-free certificates must be obtained from NXP directly as the part is NRND/EOL.