MC68340CAG25E - 32-Bit M683xx MPU, 25MHz, DMA, 144-LQFP | NXP
Référence : MC68340CAG25E ✗ Fin de vie| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour MC68340CAG25E — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC68340CAG25E (même facteur de forme et même empreinte) — différant par Core Architecture, Mounting Type, Core Processor, DMA Channels, Data Bus Width.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68340AG16E
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC68340CAB25E
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$19.85 / unité
Voir la fiche technique →MC68340CAG16E
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$17.6 / unité
Voir la fiche technique →MC68340CAG25E Valeurs maximales et caractéristiques électriques
| Processor Type | M683xx 32-Bit MPU (CPU32) |
| Core Processor | CPU32 (M68000-compatible, enhanced) |
| Core Architecture | M68000 (CISC) |
| Number of Cores | 1 |
| Largeur du bus de données | 32-bit internal / 16-bit external |
| Clock Speed (Max) | 25 MHz |
| Tension d'alimentation de fonctionnement | 5 V |
| On-Chip DMA | Yes (2 channels) |
| On-Chip Timer | Yes (4-channel, 16-bit) |
| On-Chip Serial | Yes (QSM: UART + SPI) |
| Boîtier / Format | 144-LQFP (20 x 20 mm) |
| Type de montage | Surface Mount |
| Packaging | Tray |
| Lead Free Status | Lead Free (per DigiKey listing) |
Configuration des broches de MC68340CAG25E
| Broche 1 | TCLK — Timer clock input |
| Broche 2 | TDATA0 — Timer data line 0 |
| Broche 3 | TDATA1 — Timer data line 1 |
| Broche 4 | TDATA2 — Timer data line 2 |
| Broche 5 | TDATA3 — Timer data line 3 |
| Broche 6 | DSO/PCSOK — QSM data strobe / PCS OK |
| Broche 7 | VCC — 5 V supply |
| Broche 8 | RXD — QSM receive data |
| Broche 9 | TXD — QSM transmit data |
| Broche 10 | SCK — QSM serial clock |
| Broche 11 | PCS0 — Peripheral chip select 0 |
| Broche 12 | PCS1 — Peripheral chip select 1 |
| Broche 13 | PCS2 — Peripheral chip select 2 |
| Broche 14 | PCS3 — Peripheral chip select 3 |
| Broche 15 | GND — Ground |
| Broche 16 | VCC — 5 V supply |
| Broche 17 | A0 — Address bus bit 0 |
| Broche 18 | A1 — Address bus bit 1 |
| Broche 19 | A2 — Address bus bit 2 |
| Broche 20 | A3 — Address bus bit 3 |
| Broche 21 | A4 — Address bus bit 4 |
| Broche 22 | A5 — Address bus bit 5 |
| Broche 23 | A6 — Address bus bit 6 |
| Broche 24 | A7 — Address bus bit 7 |
| Broche 25 | A8 — Address bus bit 8 |
| Broche 26 | A9 — Address bus bit 9 |
| Broche 27 | A10 — Address bus bit 10 |
| Broche 28 | A11 — Address bus bit 11 |
| Broche 29 | A12 — Address bus bit 12 |
| Broche 30 | A13 — Address bus bit 13 |
| Broche 31 | A14 — Address bus bit 14 |
| Broche 32 | A15 — Address bus bit 15 |
| Broche 33 | A16 — Address bus bit 16 |
| Broche 34 | A17 — Address bus bit 17 |
| Broche 35 | A18 — Address bus bit 18 |
| Broche 36 | A19 — Address bus bit 19 |
| Broche 37 | A20 — Address bus bit 20 |
| Broche 38 | A21 — Address bus bit 21 |
| Broche 39 | A22 — Address bus bit 22 |
| Broche 40 | A23 — Address bus bit 23 |
| Broche 41 | A24 — Address bus bit 24 |
| Broche 42 | A25 — Address bus bit 25 |
| Broche 43 | A26 — Address bus bit 26 |
| Broche 44 | A27 — Address bus bit 27 |
| Broche 45 | A28 — Address bus bit 28 |
| Broche 46 | A29 — Address bus bit 29 |
| Broche 47 | A30 — Address bus bit 30 |
| Broche 48 | A31 — Address bus bit 31 |
| Broche 49 | VCC — 5 V supply |
| Broche 50 | D15 — Data bus bit 15 (MSB) |
| Broche 51 | D14 — Data bus bit 14 |
| Broche 52 | D13 — Data bus bit 13 |
| Broche 53 | D12 — Data bus bit 12 |
| Broche 54 | D11 — Data bus bit 11 |
| Broche 55 | D10 — Data bus bit 10 |
| Broche 56 | D9 — Data bus bit 9 |
| Broche 57 | D8 — Data bus bit 8 |
| Broche 58 | VCC — 5 V supply |
| Broche 59 | D7 — Data bus bit 7 |
| Broche 60 | D6 — Data bus bit 6 |
| Broche 61 | D5 — Data bus bit 5 |
| Broche 62 | D4 — Data bus bit 4 |
| Broche 63 | D3 — Data bus bit 3 |
| Broche 64 | D2 — Data bus bit 2 |
| Broche 65 | D1 — Data bus bit 1 |
| Broche 66 | D0 — Data bus bit 0 (LSB) |
| Broche 67 | GND — Ground |
| Broche 68 | AS — Address Strobe |
| Broche 69 | DS — Data Strobe |
| Broche 70 | R/W — Read/Write control |
| Broche 71 | SIZE — Transfer size |
| Broche 72 | FC0 — Function code 0 |
| Broche 73 | FC1 — Function code 1 |
| Broche 74 | FC2 — Function code 2 |
| Broche 75 | CLKOUT — System clock output |
| Broche 76 | RESET — Reset input |
| Broche 77 | HALT — Halt input |
| Broche 78 | BR — Bus request |
| Broche 79 | BG — Bus grant |
| Broche 80 | BGACK — Bus grant acknowledge |
| Broche 81 | IPL0 — Interrupt priority level 0 |
| Broche 82 | IPL1 — Interrupt priority level 1 |
| Broche 83 | IPL2 — Interrupt priority level 2 |
| Broche 84 | VCC — 5 V supply |
| Broche 85 | CS0 — Chip-select output 0 |
| Broche 86 | CS1 — Chip-select output 1 |
| Broche 87 | CS2 — Chip-select output 2 |
| Broche 88 | CS3 — Chip-select output 3 |
| Broche 89 | CS4 — Chip-select output 4 |
| Broche 90 | CS5 — Chip-select output 5 |
| Broche 91 | CS6 — Chip-select output 6 |
| Broche 92 | CS7 — Chip-select output 7 |
| Broche 93 | CS8 — Chip-select output 8 |
| Broche 94 | CS9 — Chip-select output 9 |
| Broche 95 | CS10 — Chip-select output 10 |
| Broche 96 | GND — Ground |
| Broche 97 | DREQ0 — DMA request 0 |
| Broche 98 | DREQ1 — DMA request 1 |
| Broche 99 | DACK0 — DMA acknowledge 0 |
| Broche 100 | DACK1 — DMA acknowledge 1 |
| Broche 101 | DONF — DMA done flag |
| Broche 102 | FREEZE — Freeze / BDM control |
| Broche 103 | IFETCH — Instruction fetch indicator |
| Broche 104 | IPIPE — Instruction pipe indicator |
| Broche 105 | BERR — Bus error |
| Broche 106 | AVEC — Autovectored interrupt |
| Broche 107 | EXTAL — External clock / crystal input |
| Broche 108 | XTAL — Crystal output |
| Broche 109 | VCC — 5 V supply |
| Broche 110 | GND — Ground |
| Broche 111 | MODCK — Mode / clock control |
| Broche 112 | TCK — JTAG / BDM test clock |
| Broche 113 | TMS — JTAG / BDM test mode select |
| Broche 114 | TDI — JTAG / BDM test data in |
| Broche 115 | TDO — JTAG / BDM test data out |
| Broche 116 | TRST — JTAG / BDM test reset |
| Broche 117 | DSI — Debug serial in (BDM) |
| Broche 118 | DSO — Debug serial out (BDM) |
| Broche 119 | BKPT — Breakpoint input (BDM) |
| Broche 120 | GND — Ground |
| Broche 121 | VCC — 5 V supply |
| Broche 122 | TP0 — Test pin 0 (reserved) |
| Broche 123 | TP1 — Test pin 1 (reserved) |
| Broche 124 | TP2 — Test pin 2 (reserved) |
| Broche 125 | TP3 — Test pin 3 (reserved) |
| Broche 126 | TP4 — Test pin 4 (reserved) |
| Broche 127 | TP5 — Test pin 5 (reserved) |
| Broche 128 | TP6 — Test pin 6 (reserved) |
| Broche 129 | TP7 — Test pin 7 (reserved) |
| Broche 130 | NC — Not connected (per datasheet) |
| Broche 131 | NC — Not connected (per datasheet) |
| Broche 132 | NC — Not connected (per datasheet) |
| Broche 133 | NC — Not connected (per datasheet) |
| Broche 134 | VSTBY — Standby supply (RTC / RAM) |
| Broche 135 | VCC — 5 V supply |
| Broche 136 | NC — Not connected (per datasheet) |
| Broche 137 | NC — Not connected (per datasheet) |
| Broche 138 | GND — Ground |
| Broche 139 | TA — Transfer acknowledge |
| Broche 140 | TBI — Transfer burst inhibit |
| Broche 141 | RMC — Read-modify-write control |
| Broche 142 | DBE — Data bus enable |
| Broche 143 | DSACK0 — Data transfer acknowledge 0 |
| Broche 144 | DSACK1 — Data transfer acknowledge 1 |
Applications typiques
MC68340CAG25E convient pour 7 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68340CAG25E — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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% |
Principaux différenciateurs
- Highest speed grade of the MC68340 family (vs MC68340AG16E)
- Integrated peripherals (vs MC68302)
- Same-family drop-in (vs MC68340CAB25E)
Notes de conception
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.
Informations de conformité
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.