MC68340CAG25E - 32-Bit M683xx MPU, 25MHz, DMA, 144-LQFP | NXP
N.º da peça: MC68340CAG25E ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $38.5 | $38,50 |
| 10 | $34.65 | $346,50 |
| 100 | $31.2 | $3.120,00 |
| 500 | $27.95 | $13.975,00 |
| 1.000 | $24.75 | $24.750,00 |
MC68340CAG25E Visão geral
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.
Alternativas drop-in para MC68340CAG25E — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MC68340CAG25E (mesmo formato e footprint) — diferindo em Core Architecture, Mounting Type, Core Processor, DMA Channels, Data Bus Width.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68340AG16E
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MC68340CAB25E
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$19.85 / unidade
Ver ficha técnica →MC68340CAG16E
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$17.6 / unidade
Ver ficha técnica →MC68340CAG25E Classificações máximas e características elétricas
| Processor Type | M683xx 32-Bit MPU (CPU32) |
| Core Processor | CPU32 (M68000-compatible, enhanced) |
| Core Architecture | M68000 (CISC) |
| Number of Cores | 1 |
| Largura do barramento de dados | 32-bit internal / 16-bit external |
| Clock Speed (Max) | 25 MHz |
| Tensão de alimentação de operação | 5 V |
| On-Chip DMA | Yes (2 channels) |
| On-Chip Timer | Yes (4-channel, 16-bit) |
| On-Chip Serial | Yes (QSM: UART + SPI) |
| Encapsulamento / Caixa | 144-LQFP (20 x 20 mm) |
| Tipo de montagem | Surface Mount |
| Packaging | Tray |
| Lead Free Status | Lead Free (per DigiKey listing) |
Configuração de pinos do MC68340CAG25E
| Pino 1 | TCLK — Timer clock input |
| Pino 2 | TDATA0 — Timer data line 0 |
| Pino 3 | TDATA1 — Timer data line 1 |
| Pino 4 | TDATA2 — Timer data line 2 |
| Pino 5 | TDATA3 — Timer data line 3 |
| Pino 6 | DSO/PCSOK — QSM data strobe / PCS OK |
| Pino 7 | VCC — 5 V supply |
| Pino 8 | RXD — QSM receive data |
| Pino 9 | TXD — QSM transmit data |
| Pino 10 | SCK — QSM serial clock |
| Pino 11 | PCS0 — Peripheral chip select 0 |
| Pino 12 | PCS1 — Peripheral chip select 1 |
| Pino 13 | PCS2 — Peripheral chip select 2 |
| Pino 14 | PCS3 — Peripheral chip select 3 |
| Pino 15 | GND — Ground |
| Pino 16 | VCC — 5 V supply |
| Pino 17 | A0 — Address bus bit 0 |
| Pino 18 | A1 — Address bus bit 1 |
| Pino 19 | A2 — Address bus bit 2 |
| Pino 20 | A3 — Address bus bit 3 |
| Pino 21 | A4 — Address bus bit 4 |
| Pino 22 | A5 — Address bus bit 5 |
| Pino 23 | A6 — Address bus bit 6 |
| Pino 24 | A7 — Address bus bit 7 |
| Pino 25 | A8 — Address bus bit 8 |
| Pino 26 | A9 — Address bus bit 9 |
| Pino 27 | A10 — Address bus bit 10 |
| Pino 28 | A11 — Address bus bit 11 |
| Pino 29 | A12 — Address bus bit 12 |
| Pino 30 | A13 — Address bus bit 13 |
| Pino 31 | A14 — Address bus bit 14 |
| Pino 32 | A15 — Address bus bit 15 |
| Pino 33 | A16 — Address bus bit 16 |
| Pino 34 | A17 — Address bus bit 17 |
| Pino 35 | A18 — Address bus bit 18 |
| Pino 36 | A19 — Address bus bit 19 |
| Pino 37 | A20 — Address bus bit 20 |
| Pino 38 | A21 — Address bus bit 21 |
| Pino 39 | A22 — Address bus bit 22 |
| Pino 40 | A23 — Address bus bit 23 |
| Pino 41 | A24 — Address bus bit 24 |
| Pino 42 | A25 — Address bus bit 25 |
| Pino 43 | A26 — Address bus bit 26 |
| Pino 44 | A27 — Address bus bit 27 |
| Pino 45 | A28 — Address bus bit 28 |
| Pino 46 | A29 — Address bus bit 29 |
| Pino 47 | A30 — Address bus bit 30 |
| Pino 48 | A31 — Address bus bit 31 |
| Pino 49 | VCC — 5 V supply |
| Pino 50 | D15 — Data bus bit 15 (MSB) |
| Pino 51 | D14 — Data bus bit 14 |
| Pino 52 | D13 — Data bus bit 13 |
| Pino 53 | D12 — Data bus bit 12 |
| Pino 54 | D11 — Data bus bit 11 |
| Pino 55 | D10 — Data bus bit 10 |
| Pino 56 | D9 — Data bus bit 9 |
| Pino 57 | D8 — Data bus bit 8 |
| Pino 58 | VCC — 5 V supply |
| Pino 59 | D7 — Data bus bit 7 |
| Pino 60 | D6 — Data bus bit 6 |
| Pino 61 | D5 — Data bus bit 5 |
| Pino 62 | D4 — Data bus bit 4 |
| Pino 63 | D3 — Data bus bit 3 |
| Pino 64 | D2 — Data bus bit 2 |
| Pino 65 | D1 — Data bus bit 1 |
| Pino 66 | D0 — Data bus bit 0 (LSB) |
| Pino 67 | GND — Ground |
| Pino 68 | AS — Address Strobe |
| Pino 69 | DS — Data Strobe |
| Pino 70 | R/W — Read/Write control |
| Pino 71 | SIZE — Transfer size |
| Pino 72 | FC0 — Function code 0 |
| Pino 73 | FC1 — Function code 1 |
| Pino 74 | FC2 — Function code 2 |
| Pino 75 | CLKOUT — System clock output |
| Pino 76 | RESET — Reset input |
| Pino 77 | HALT — Halt input |
| Pino 78 | BR — Bus request |
| Pino 79 | BG — Bus grant |
| Pino 80 | BGACK — Bus grant acknowledge |
| Pino 81 | IPL0 — Interrupt priority level 0 |
| Pino 82 | IPL1 — Interrupt priority level 1 |
| Pino 83 | IPL2 — Interrupt priority level 2 |
| Pino 84 | VCC — 5 V supply |
| Pino 85 | CS0 — Chip-select output 0 |
| Pino 86 | CS1 — Chip-select output 1 |
| Pino 87 | CS2 — Chip-select output 2 |
| Pino 88 | CS3 — Chip-select output 3 |
| Pino 89 | CS4 — Chip-select output 4 |
| Pino 90 | CS5 — Chip-select output 5 |
| Pino 91 | CS6 — Chip-select output 6 |
| Pino 92 | CS7 — Chip-select output 7 |
| Pino 93 | CS8 — Chip-select output 8 |
| Pino 94 | CS9 — Chip-select output 9 |
| Pino 95 | CS10 — Chip-select output 10 |
| Pino 96 | GND — Ground |
| Pino 97 | DREQ0 — DMA request 0 |
| Pino 98 | DREQ1 — DMA request 1 |
| Pino 99 | DACK0 — DMA acknowledge 0 |
| Pino 100 | DACK1 — DMA acknowledge 1 |
| Pino 101 | DONF — DMA done flag |
| Pino 102 | FREEZE — Freeze / BDM control |
| Pino 103 | IFETCH — Instruction fetch indicator |
| Pino 104 | IPIPE — Instruction pipe indicator |
| Pino 105 | BERR — Bus error |
| Pino 106 | AVEC — Autovectored interrupt |
| Pino 107 | EXTAL — External clock / crystal input |
| Pino 108 | XTAL — Crystal output |
| Pino 109 | VCC — 5 V supply |
| Pino 110 | GND — Ground |
| Pino 111 | MODCK — Mode / clock control |
| Pino 112 | TCK — JTAG / BDM test clock |
| Pino 113 | TMS — JTAG / BDM test mode select |
| Pino 114 | TDI — JTAG / BDM test data in |
| Pino 115 | TDO — JTAG / BDM test data out |
| Pino 116 | TRST — JTAG / BDM test reset |
| Pino 117 | DSI — Debug serial in (BDM) |
| Pino 118 | DSO — Debug serial out (BDM) |
| Pino 119 | BKPT — Breakpoint input (BDM) |
| Pino 120 | GND — Ground |
| Pino 121 | VCC — 5 V supply |
| Pino 122 | TP0 — Test pin 0 (reserved) |
| Pino 123 | TP1 — Test pin 1 (reserved) |
| Pino 124 | TP2 — Test pin 2 (reserved) |
| Pino 125 | TP3 — Test pin 3 (reserved) |
| Pino 126 | TP4 — Test pin 4 (reserved) |
| Pino 127 | TP5 — Test pin 5 (reserved) |
| Pino 128 | TP6 — Test pin 6 (reserved) |
| Pino 129 | TP7 — Test pin 7 (reserved) |
| Pino 130 | NC — Not connected (per datasheet) |
| Pino 131 | NC — Not connected (per datasheet) |
| Pino 132 | NC — Not connected (per datasheet) |
| Pino 133 | NC — Not connected (per datasheet) |
| Pino 134 | VSTBY — Standby supply (RTC / RAM) |
| Pino 135 | VCC — 5 V supply |
| Pino 136 | NC — Not connected (per datasheet) |
| Pino 137 | NC — Not connected (per datasheet) |
| Pino 138 | GND — Ground |
| Pino 139 | TA — Transfer acknowledge |
| Pino 140 | TBI — Transfer burst inhibit |
| Pino 141 | RMC — Read-modify-write control |
| Pino 142 | DBE — Data bus enable |
| Pino 143 | DSACK0 — Data transfer acknowledge 0 |
| Pino 144 | DSACK1 — Data transfer acknowledge 1 |
Aplicações típicas
MC68340CAG25E é adequado para 7 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68340CAG25E — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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% |
Principais diferenciais
- Highest speed grade of the MC68340 family (vs MC68340AG16E)
- Integrated peripherals (vs MC68302)
- Same-family drop-in (vs MC68340CAB25E)
Notas de projeto
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.
Informações de conformidade
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.