MC68302AG25C - 25MHz M683xx Integrated Comm Processor | NXP
Teilenummer: MC68302AG25C ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $25.2 | $252,00 |
| 100 | $22 | $2.200,00 |
| 500 | $18.8 | $9.400,00 |
| 1.000 | $16.4 | $16.400,00 |
MC68302AG25C Übersicht
An integrated communications processor (ICP) is a category of embedded microprocessor that tightly couples a CPU core with dedicated serial-channel and DMA hardware on the same silicon die. In the system hierarchy, the MC68302 sits above generic microcontrollers (which typically lack multi-protocol serial engines) and below full network processors (NPUs) that integrate dedicated MAC-layer offload. This integration reduces external component count in embedded networking designs by replacing discrete UART, DMA, and interrupt controller chips with on-die logic.
Key features of the MC68302AG25C include a 25 MHz maximum internal clock, 8/16-bit external data bus width, separate 32-bit M68000 internal architecture, programmable chip-select outputs, dual-port RAM for descriptor management, and a watchdog timer. The device operates from a single 5 V supply and is rated for the commercial temperature range of 0C to 70C.
Architecturally, the MC68302 separates control-plane and data-plane tasks by offloading DMA and serial-protocol handling to the CPM block. Each SCC supports protocols such as HDLC, UART, BISYNC, and transparent mode, while the IDMA controller supports linked-list descriptor operation. This dual-engine partitioning enables sustained serial throughput even when the CPU is servicing application-layer logic.
Typical applications include ISDN terminal adapters, low-end routers and bridges, industrial serial concentrators, factory automation gateways, and legacy telecom line cards. Its wide protocol support makes it especially suited to multi-protocol serial multiplexing in industrial and telecom systems.
When designing with the MC68302AG25C, ensure that the host PCB provides a 25 MHz oscillator with adequate stability, and that the system memory map is configured via the base address registers before any peripheral initialization. Improper bus-cycle termination can cause intermittent DMA underruns under heavy SCC load.
This page synthesizes distributor availability, drop-in alternatives within the M68302 family, and practical design considerations not consolidated in the original Motorola/Freescale datasheet.
Drop-in-Alternativen für MC68302AG25C – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MC68302AG25C (gleiche Bauform und Footprint) – abweichend in Core Architecture, Address Bus Width, DMA Channels, Data Bus Width, Maximum Clock Frequency.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC68302FC25C
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68302CFC25C
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MC68302AG16C
✅ Drop-In✓ Auf Lager
$13.55 / Stück
Datenblatt ansehen →MC68302FC20C
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MC68302AG20C
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$54.1 / Stück
Datenblatt ansehen →MC68302AG25C Grenzwerte & elektrische Eigenschaften
| Core Processor | M68000 |
| Core Architecture | M683xx |
| Number of Cores | 1 |
| Datenbusbreite | 8/16 bit |
| Maximale Taktfrequenz | 25 MHz |
| Internal Architecture | 32-bit |
| Versorgungsspannung | 5 V |
| Betriebstemperatur | 0C to 70C |
| Gehäuse / Bauform | 144-LQFP (20x20 mm) |
| Montageart | Surface Mount |
| Serial Communication Controllers (SCC) | 3 |
| Serial Management Controllers (SMC) | 2 |
| DMA Channels (IDMA) | 2 |
| Timers | 2 x 16-bit |
| Watchdog Timer | Yes |
| Programmable Chip Selects | Yes |
| Dual-Port RAM | Yes (for descriptors) |
| RoHS-Status | Compliant (factory statement) |
MC68302AG25C 144-lqfp (20x20 mm) Pinbelegungsleitfaden
Pinbelegung für MC68302AG25C (144-lqfp (20x20 mm)-Gehäuse). Dieser digitale IC umfasst GPIO, Kommunikationsschnittstellen (UART, SPI, I2C) und Versorgungspins. Alternative Pin-Funktionen und Konfigurationsoptionen entnehmen Sie dem Herstellerdatenblatt. Unverzichtbar für Embedded-System-Design und PCB-Layout.
Keine detaillierten Pinbelegungsdaten verfügbar für MC68302AG25C.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
MC68302AG25C ist geeignet für 6 Anwendungs: ISDN Terminal Adapter, Low-End Router/Bridge, Industrial Serial Concentrator, Factory Automation Gateway, Legacy Telecom Line Card, POS Terminal / Embedded Controller.
ISDN Terminal Adapter
The MC68302AG25C fits ISDN terminal adapters because its three SCCs support HDLC/SDLC framing at sustained bit rates well above ISDN BRI's 144 kbps per B-channel. With 25 MHz core clock and on-chip IDMA, the CPM block can offload framing and DMA tasks so the CPU handles only the application layer. The 144-LQFP package supports the small form factor typical of desktop ISDN adapters.
Empfohlen
Low-End Router/Bridge
The MC68302AG25C fits low-end router/bridge designs because its three SCCs map naturally to LAN/WAN/modem ports and the IDMA engine handles packet transfer to/from external buffer memory without CPU intervention. At 25 MHz the M68000 core can route small frames at wire rate on low-speed serial links. The 5 V single supply and 144-LQFP package suit industrial router hardware where reliability matters more than absolute throughput.
Empfohlen
Industrial Serial Concentrator
The MC68302AG25C fits industrial serial concentrators that aggregate multiple RS-232/RS-485 links because each SCC independently supports UART framing and the IDMA engine links descriptors for back-to-back reception. At 25 MHz the device can manage five simultaneous serial channels (3 SCC + 2 SMC) with low CPU overhead. The commercial 0-70C range suits factory-floor cabinets; the 5 V supply simplifies power design.
Empfohlen
Factory Automation Gateway
The MC68302AG25C fits factory automation gateways that bridge fieldbus protocols (Profibus, Modbus, etc.) to Ethernet or higher-speed backbones because its multi-protocol SCCs can be configured to support the framing of each fieldbus variant. The on-chip watchdog timer and programmable chip selects simplify interface logic to glue peripherals. Designers favor the 144-LQFP package for its industrial-grade assembly compatibility.
Empfohlen
Legacy Telecom Line Card
The MC68302AG25C fits legacy telecom line cards where HDLC channels terminate T1/E1 spans because each SCC handles full HDLC bit stuffing and CRC generation in hardware at 1.544/2.048 Mbps. The 25 MHz core can supervise per-channel maintenance without taxing CPU bandwidth. Its 5 V supply aligns with legacy backplane power designs still deployed in central-office line-card shelves.
Empfohlen
POS Terminal / Embedded Controller
The MC68302AG25C fits point-of-sale terminals and embedded controllers that require multiple UART peripherals (printer, scanner, EFT modem) because its five independent serial channels (3 SCC + 2 SMC) eliminate the need for an external UART-expansion chip. The M68000 core executes terminal-control firmware comfortably at 25 MHz. The 144-LQFP package meets surface-mount manufacturing cost targets.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC68302AG25C – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC68302FC25C | MC68302CFC25C | MC68302AG16C | MC68302FC20C | MC68302AG20C |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors (formerly Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 16 MHz (-36%) | 20 MHz (-20%) | 20 MHz (-20%) |
| Core Architecture | M68000 | M68000 | M68000 | M68000 | M68000 | M68000 |
| Data Bus Width | 8/16 bit | 8/16 bit | 8/16 bit | 8/16 bit | 8/16 bit | 8/16 bit |
| Operating Temperature | 0C to 70C (commercial) | 0C to 70C | -40C to 85C (industrial CF grade) | 0C to 70C | 0C to 70C | 0C to 70C |
| SCC Count | 3 | 3 | 3 | 3 | 3 | 3 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
Wichtigste Unterscheidungsmerkmale
- Faster clock than 16 MHz / 20 MHz M68302 grades (vs. MC68302AG16C)
- Industrial temperature variant available in same package (vs. MC68302CFC25C)
- Three independent SCCs vs MC68332's QSM (vs. MC68332ACAG25)
Designhinweise
Estimated: The MC68302AG25C draws approximately 200-300 mA from a single 5 V supply at 25 MHz. Provide a 10 uF tantalum bulk capacitor near the VCC pins and 0.1 uF ceramic decoupling on each VCC pin pair. Unlike low-voltage ARM/ColdFire parts, no separate core or PLL rail is required.
Estimated: At continuous 25 MHz with all SCCs active, power dissipation is roughly 1.0-1.5 W. The 144-LQFP package thermal resistance theta_JA is approximately 35 C/W on a standard 4-layer JEDEC test board, yielding a junction temperature rise of 35-50C above ambient. For continuous full-load operation in cabinets exceeding 50C ambient, ensure adequate airflow or attach a small heatsink.
Do not exceed 5.5 V on any VCC pin or 6.5 V absolute maximum on input pins - the M68000 core is a 5 V part and lacks modern ESD tolerance. Ensure the external 25 MHz oscillator meets the datasheet AC electrical characteristics (rise/fall time under 5 ns). Improper bus-cycle termination can cause intermittent DMA underruns under heavy SCC load - terminate bus signals per the application note recommendations.
The external data bus operates at 8/16-bit width with synchronous clocking at 25 MHz. Trace lengths on the address/data bus should be matched to within 25 mm to avoid bus contention during read/write cycles. Add 33 ohm series termination on the bus signals if routing exceeds 50 mm, especially on backplane designs where multiple loads are present.
Compliance-Informationen
RoHS compliance per NXP factory statements. Not AEC-Q100 qualified (this is a telecom/networking MPU, not automotive). For automotive-grade networking processors, consider MCF52235 or similar ColdFire automotive parts.
