MC68LC302AF16VCT - 16MHz 68K MPU w/ Comm, 100-LQFP | NXP
Référence : MC68LC302AF16VCT ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $24.5 | $24,50 |
| 10 | $22.1 | $221,00 |
| 100 | $19.8 | $1 980,00 |
| 500 | $17.95 | $8 975,00 |
| 1 000 | $16.25 | $16 250,00 |
MC68LC302AF16VCT Présentation
An MPU (microprocessor unit) is the central processing element of an embedded system. Unlike a microcontroller, an MPU relies on external memory and peripherals. The 68K (MC68000) architecture is a classic CISC ISA widely used in telecom, industrial control, and aerospace legacy designs. The 68302 family extends this with a closely-coupled CPM that offloads serial and DMA work from the CPU, placing it in the taxonomy: microprocessor -> 68K MPU -> integrated communications processor -> embedded networking IC.
Key features include a 16.67 MHz MC68000 core (1 Core, 8/16-bit internal bus), an RISC CPM for serial/DMA, dual DMA channels (2 IDMA), 1152 bytes of dual-port RAM, and on-chip DRAM refresh controller. The serial interface supports three SCC (Serial Communications Controller) ports plus one SCP port. Operating voltage is 5V typical; the device runs from -40C to +85C.
Typical applications include legacy industrial routers, ISDN terminal adapters, X.25/frame-relay switches, embedded serial-comm controllers, and telecom glue-logic replacement. The integrated CPM reduces BOM count versus a CPU + external UART/DMA design.
Designers should note the 100-LQFP footprint requires thermal attention at high ambient temperatures. Pin-compatible 68302 variants (full, LC, FU) allow memory-size scaling on the same land pattern.
Alternatives de remplacement direct pour MC68LC302AF16VCT — 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 MC68LC302AF16VCT (même facteur de forme et même empreinte) — différant par Manufacturer.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68302AF16VCT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68EN302AF16VCT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68302AF10VCT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC68302AG16VCT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68LC302AF20VCT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$15.9 / unité
Voir la fiche technique →MC68LC302AF25VCT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC68LC302AF16VCT Valeurs maximales et caractéristiques électriques
| Manufacturer | NXP USA Inc. / Freescale Semiconductor |
| Series | M683xx |
| Core Processor | M68000 |
| Number of Cores | 1 |
| Bus Width | 8/16-Bit |
| Core Speed | 16 MHz (16.67 MHz) |
| Co-Processors / DSP | Communications; RISC CPM |
| RAM Controllers | DRAM |
| Température de fonctionnement | -40C to +85C |
| Boîtier / Format | 100-LQFP (14x14 mm) |
| Type de montage | Surface Mount |
| Part Status | Not For New Designs |
| Peripheral Key Features | HDLC/SDLC, UART, DMA, DRAM controller |
| Supplier Device Package | 100-LQFP |
| Statut RoHS | Compliant |
Guide de configuration des broches du MC68LC302AF16VCT 100-lqfp
Configuration des broches du MC68LC302AF16VCT (boîtier 100-lqfp). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MC68LC302AF16VCT.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC68LC302AF16VCT convient pour 6 applications: Legacy Industrial Router, ISDN Terminal Adapter, X.25 / Frame-Relay Switch, Embedded Serial-Communications Bridge, Telecom Protocol Converter, Industrial Modem Pool.
Legacy Industrial Router
The MC68LC302AF16VCT fits legacy industrial routers because its integrated RISC CPM offloads HDLC/SDLC framing from the 16 MHz MC68000 core, reducing BOM cost versus a CPU-plus-external-UART design. The CPM drives up to 3 SCC channels plus 1 SCP channel, sufficient for legacy WAN interfaces such as V.35, RS-232, and RS-485. With 1152 bytes of dual-port RAM, the CPM and CPU can exchange descriptors without external bus contention. Designers typically pair the device with an external 256Kx16 SRAM and a serial EEPROM for boot config. The 100-LQFP footprint and 5V supply make it drop-in compatible with existing 68302 router designs.
Recommandé
ISDN Terminal Adapter
ISDN terminal adapters historically used the 68LC302 because the on-chip RISC CPM handles the LAPD (HDLC-based) D-channel framing at full ISDN BRI rates without CPU intervention. The 16 MHz MC68000 core runs the upper-layer protocol stack while the CPM services the physical layer. The 100-LQFP footprint survives in production designs dating from the 1990s, and the LC variant's smaller die fits cost-sensitive consumer terminal equipment. Replace with MCF5272 for new ISDN designs, keeping in mind the 3.3V/1.8V power and BGA package change.
Recommandé
X.25 / Frame-Relay Switch
The 68LC302 was a classic X.25 packet assembler/disassembler (PAD) and frame-relay switch engine because its CPM natively handles HDLC framing required by X.25 LAPB and frame-relay LMI. The dual IDMA channels manage data movement between the CPM and external packet buffers without loading the CPU. The 16 MHz core is fast enough for typical 64 kbps to 2 Mbps trunk rates. For legacy field upgrades, the same 100-LQFP footprint accommodates the full MC68302 or the Ethernet-enabled MC68EN302 for migration to IP.
Recommandé
Embedded Serial-Communications Bridge
Industrial serial-bridge designs use the 68LC302 to convert between UART, HDLC, and proprietary synchronous protocols because the CPM's SCCs are independently programmable. Designers can dedicate SCC1 to UART (for SCADA), SCC2 to HDLC (for radio link), and SCC3 to bisync (for legacy controllers), all sharing one IC. The 16 MHz core manages the bridging logic while the CPM services line-rate traffic. The 100-LQFP footprint allows compact industrial SBC designs and matches the LC family's price-sensitive positioning.
Recommandé
Telecom Protocol Converter
Protocol converters between SS7, V.24, and proprietary telecom busses historically relied on the 68302 family's tightly coupled CPM, since the dual-port RAM allows zero-copy descriptor passing between SCC channels. The 68LC302's 5V supply, 100-LQFP footprint, and 16 MHz clock rate remain adequate for legacy 64 kbps trunk conversion. Modern designs should migrate to MCF5272 or MCF5282 ColdFire parts, accepting a BGA package and 3.3V supply change.
Recommandé
Industrial Modem Pool
Multiport industrial modems historically used the 68LC302 as a shared controller arbitrating multiple UART channels. Each SCC supports independent baud rates and protocols, allowing one IC to drive 3 modems while the 16 MHz MC68000 core handles AT command parsing and error correction. The integrated DRAM controller simplifies PCB layout by removing external glue logic. The 100-LQFP footprint keeps the modem pool design compact, and the LC pricing matches cost-sensitive industrial volumes.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68LC302AF16VCT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68302AF16VCT | MC68EN302AF16VCT | MC68302AF10VCT | MC68302AG16VCT | MC68LC302AF20VCT | MC68LC302AF25VCT |
|---|---|---|---|---|---|---|---|
| Package | 100-LQFP (14x14) | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same | 100-LQFP (14x14) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Speed | 16 MHz | 16 MHz | 16 MHz | 10 MHz | 16 MHz | 20 MHz | 25 MHz |
| Core Processor | MC68000 (LC) | MC68000 (full) | MC68000 + Ethernet | MC68000 (full) | MC68000 (full) | MC68000 (LC) | MC68000 (LC) |
| SCC Channels | 3 SCC + 1 SCP | 3 SCC + 1 SCP | 3 SCC + 1 SCP | 3 SCC + 1 SCP | 3 SCC + 1 SCP | 3 SCC + 1 SCP | 3 SCC + 1 SCP |
| Ethernet MAC | No | No | Yes | No | No | No | No |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND | NRND |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principaux différenciateurs
- Pin-compatible migration to MC68302 full variant (vs MC68302AF16VCT)
- Integrated Ethernet MAC option available in same package (vs MC68EN302AF16VCT)
- Lowest-cost entry into 68302 family (vs MC68302AF16VCT)
Notes de conception
The MC68LC302AF16VCT requires a stable 5V supply with a 100 mA typical current budget. Place a 100 nF decoupling capacitor at each of the four VCC pin clusters and a 10 uF bulk capacitor near the package. The internal PLL is sensitive to VCC ripple; keep switching regulators away from the analog 5V rail or add pi-filter LC networks. Power-on reset is generated internally; hold /RESET low for at least 100 ms after VCC reaches 4.75V to ensure clean initialization.
Route the 16.67 MHz CPU clock with a short trace surrounded by ground; avoid running it parallel to the address bus for more than 25 mm to limit crosstalk. The DRAM controller outputs RAS/CAS signals with fast edge rates - keep these traces length-matched within 5 mm to avoid double-clocking at high temperature. The 100-LQFP footprint has a 0.5 mm pitch; use 0.2 mm trace/space rules and a 4-layer stackup with continuous ground plane below the part for controlled impedance on the bus.
Three common pitfalls: (1) Failing to initialize the CPM SCC baud-rate generator prescaler before enabling the SCC; this causes silent protocol failures. (2) Leaving /IRQ7 floating; the internal interrupt controller expects a defined level. (4) Using address lines A0-A23 without external bus transceivers when driving more than 2 DRAM banks - the LC302 lacks the bus-hold strength of the full MC68302. Always consult the MC68302 family datasheet chapter on bus arbitration before adding external bus masters.
Informations de conformité
RoHS-compliant per NXP product page. Not AEC-Q100 qualified (industrial/legacy telecom use). Halogen-free status unknown - consult NXP environmental compliance documentation.