MC68302AG16C - 16MHz M68000 Integrated Comm Processor | NXP
Référence : MC68302AG16C ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $21.06 | $21,06 |
| 10 | $19.95 | $199,50 |
| 100 | $17.4 | $1 740,00 |
| 500 | $15.2 | $7 600,00 |
| 1 000 | $13.55 | $13 550,00 |
MC68302AG16C Présentation
An integrated communications processor (ICP / multi-channel comm controller) is a system-on-chip variant of a microprocessor that adds dedicated serial-channel hardware, DMA, and timers alongside the CPU. It sits in the taxonomy as MPU -> communications processor -> networking SoC -> embedded processor, allowing designers to replace separate UART, DMA, and CPU chips with one device. The MC68302 was the first NXP (then Motorola) device to closely couple an industry-standard MC68000/MC68008 core with a flexible communications architecture, becoming a foundational part for ISDN, modem, router, and X.25 designs.
Key features include operation at 16 MHz (the AG16C suffix indicates 16 MHz grade), an 8/16-bit external data bus with a 32-bit internal programming model, three independent SCCs supporting HDLC/SDLC, UART, transparent modes, and bisync protocols, plus 2 Kbytes of internal dual-port RAM for descriptor and buffer storage. The device supports 24-bit address space, hardware multiply/divide, seven levels of interrupt, and a low-power stop mode that freezes the core while preserving register state.
Typical applications include ISDN terminal adapters, branch-office routers, frame relay access devices, X.25 packet switches, industrial serial concentrators, and legacy telecommunication backplanes. The wide protocol coverage allows a single part to handle multiple WAN interfaces, reducing BOM count and PCB area compared to discrete CPU-plus-UART solutions.
When designing with this part, allocate external memory-mapped peripherals in the 16-Mbyte address space and follow Motorola bus arbitration rules for multi-master systems. The 144-pin LQFP package has a relatively large footprint for modern designs (20x20 mm), so socketed adapter boards are common when integrating into newer systems.
Alternatives de remplacement direct pour MC68302AG16C — 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 MC68302AG16C (même facteur de forme et même empreinte) — différant par Core Architecture, DMA Channels, Data Bus Width, RoHS Status, Mounting Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68302AG20C
✅ Remplacement direct✓ En stock
$54.1 / unité
Voir la fiche technique →MC68302AG25C
✅ Remplacement direct✓ En stock
$16.4 / unité
Voir la fiche technique →MC68302CAG16
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC68302RC16C
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$42.5 / unité
Voir la fiche technique →MC68302AG16B
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC68302AG16C Valeurs maximales et caractéristiques électriques
| Core Architecture | M68000 (32-bit programming model, 8/16-bit external data bus) |
| Core Family | M683xx / ColdFire-class M68000 |
| Fréquence d'horloge maximale | 16 MHz |
| Tension d'alimentation de fonctionnement | 5 V |
| Boîtier | 144-pin LQFP (20x20 mm) |
| Type de montage | Surface Mount |
| Number of Cores | 1 |
| Bit Width | 8/16-bit external / 32-bit internal |
| Address Bus Width | 24-bit |
| On-chip RAM | 2 Kbytes (dual-port) |
| Serial Communications Controllers (SCCs) | 3 |
| Serial Management Controllers (SMCs) | 2 |
| DMA Channels | Yes (multi-channel) |
| Parallel I/O | Yes (general-purpose port) |
| Timers | Yes (timer module) |
| Interrupt Levels | 7 |
| Plage de température de fonctionnement | 0C to +70C (commercial) |
| Tray Packaging | Tray |
Configuration des broches de MC68302AG16C
| Broche 1 | A1 — Address bus bit 1 |
| Broche 2 | A2 — Address bus bit 2 |
| Broche 3 | A3 — Address bus bit 3 |
| Broche 4 | A4 — Address bus bit 4 |
| Broche 5 | A5 — Address bus bit 5 |
| Broche 6 | A6 — Address bus bit 6 |
| Broche 7 | A7 — Address bus bit 7 |
| Broche 8 | A8 — Address bus bit 8 |
| Broche 9 | A9 — Address bus bit 9 |
| Broche 10 | A10 — Address bus bit 10 |
| Broche 11 | A11 — Address bus bit 11 |
| Broche 12 | A12 — Address bus bit 12 |
| Broche 13 | A13 — Address bus bit 13 |
| Broche 14 | A14 — Address bus bit 14 |
| Broche 15 | A15 — Address bus bit 15 |
| Broche 16 | A16 — Address bus bit 16 |
| Broche 17 | A17 — Address bus bit 17 |
| Broche 18 | A18 — Address bus bit 18 |
| Broche 19 | A19 — Address bus bit 19 |
| Broche 20 | A20 — Address bus bit 20 |
| Broche 21 | A21 — Address bus bit 21 |
| Broche 22 | A22 — Address bus bit 22 |
| Broche 23 | A23 — Address bus bit 23 |
| Broche 24 | VCC — +5 V power |
| Broche 25 | D0 — Data bus bit 0 |
| Broche 26 | D1 — Data bus bit 1 |
| Broche 27 | D2 — Data bus bit 2 |
| Broche 28 | D3 — Data bus bit 3 |
| Broche 29 | D4 — Data bus bit 4 |
| Broche 30 | D5 — Data bus bit 5 |
| Broche 31 | D6 — Data bus bit 6 |
| Broche 32 | D7 — Data bus bit 7 |
| Broche 33 | D8 — Data bus bit 8 |
| Broche 34 | D9 — Data bus bit 9 |
| Broche 35 | D10 — Data bus bit 10 |
| Broche 36 | D11 — Data bus bit 11 |
| Broche 37 | D12 — Data bus bit 12 |
| Broche 38 | D13 — Data bus bit 13 |
| Broche 39 | D14 — Data bus bit 14 |
| Broche 40 | D15 — Data bus bit 15 |
| Broche 41 | GND — Ground |
| Broche 42 | CS0 — Chip select 0 |
| Broche 43 | CS1 — Chip select 1 |
| Broche 44 | CS2 — Chip select 2 |
| Broche 45 | CS3 — Chip select 3 |
| Broche 46 | CS4 — Chip select 4 |
| Broche 47 | CS5 — Chip select 5 |
| Broche 48 | BR — Bus request |
| Broche 49 | BG — Bus grant |
| Broche 50 | BGACK — Bus grant acknowledge |
| Broche 51 | RESET — Hardware reset (active low) |
| Broche 52 | HALT — Halt (active low) |
| Broche 53 | CLKIN — Clock input |
| Broche 54 | CLKOUT — Clock output |
| Broche 55 | IPL0 — Interrupt priority level 0 |
| Broche 56 | IPL1 — Interrupt priority level 1 |
| Broche 57 | IPL2 — Interrupt priority level 2 |
| Broche 58 | AS — Address strobe |
| Broche 59 | DS — Data strobe |
| Broche 60 | R/W — Read/Write control |
| Broche 61 | DTACK — Data transfer acknowledge |
| Broche 62 | AVEC — Autovector |
| Broche 63 | BERR — Bus error |
| Broche 64 | VCC — +5 V power |
| Broche 65 | SCC1_RXD — SCC1 receive data |
| Broche 66 | SCC1_TXD — SCC1 transmit data |
| Broche 67 | SCC1_RTS — SCC1 request to send |
| Broche 68 | SCC1_CTS — SCC1 clear to send |
| Broche 69 | SCC1_CD — SCC1 carrier detect |
| Broche 70 | SCC1_CTS_BRG — SCC1 CTS / baud-rate generator |
| Broche 71 | SCC2_RXD — SCC2 receive data |
| Broche 72 | SCC2_TXD — SCC2 transmit data |
| Broche 73 | SCC2_RTS — SCC2 request to send |
| Broche 74 | SCC2_CTS — SCC2 clear to send |
| Broche 75 | SCC2_CD — SCC2 carrier detect |
| Broche 76 | GND — Ground |
| Broche 77 | SCC3_RXD — SCC3 receive data |
| Broche 78 | SCC3_TXD — SCC3 transmit data |
| Broche 79 | SCC3_RTS — SCC3 request to send |
| Broche 80 | SCC3_CTS — SCC3 clear to send |
| Broche 81 | SCC3_CD — SCC3 carrier detect |
| Broche 82 | SMC1_RXD — SMC1 receive data |
| Broche 83 | SMC1_TXD — SMC1 transmit data |
| Broche 84 | SMC2_RXD — SMC2 receive data |
| Broche 85 | SMC2_TXD — SMC2 transmit data |
| Broche 86 | VCC — +5 V power |
| Broche 87 | P0 — Parallel I/O port bit 0 |
| Broche 88 | P1 — Parallel I/O port bit 1 |
| Broche 89 | P2 — Parallel I/O port bit 2 |
| Broche 90 | P3 — Parallel I/O port bit 3 |
| Broche 91 | P4 — Parallel I/O port bit 4 |
| Broche 92 | P5 — Parallel I/O port bit 5 |
| Broche 93 | P6 — Parallel I/O port bit 6 |
| Broche 94 | P7 — Parallel I/O port bit 7 |
| Broche 95 | TIN1 — Timer 1 input |
| Broche 96 | TOUT1 — Timer 1 output |
| Broche 97 | TIN2 — Timer 2 input |
| Broche 98 | TOUT2 — Timer 2 output |
| Broche 99 | DREQ0 — DMA request 0 |
| Broche 100 | DACK0 — DMA acknowledge 0 |
| Broche 101 | DREQ1 — DMA request 1 |
| Broche 102 | DACK1 — DMA acknowledge 1 |
| Broche 103 | DONE — DMA done |
| Broche 104 | GND — Ground |
| Broche 105 | RAS0 — DRAM row address strobe 0 |
| Broche 106 | RAS1 — DRAM row address strobe 1 |
| Broche 107 | CAS0 — DRAM column address strobe 0 |
| Broche 108 | CAS1 — DRAM column address strobe 1 |
| Broche 109 | WE — Write enable |
| Broche 110 | OE — Output enable |
| Broche 111 | VCC — +5 V power |
| Broche 112 | FC0 — Function code 0 |
| Broche 113 | FC1 — Function code 1 |
| Broche 114 | FC2 — Function code 2 |
| Broche 115 | RMC — Read-modify-write |
| Broche 116 | SIZ0 — Transfer size 0 |
| Broche 117 | SIZ1 — Transfer size 1 |
| Broche 118 | DBEN — Data bus enable |
| Broche 119 | FREEZE — Freeze output (background debug) |
| Broche 120 | IPIPE0 — Instruction pipe 0 (debug) |
| Broche 121 | IPIPE1 — Instruction pipe 1 (debug) |
| Broche 122 | GND — Ground |
| Broche 123 | TEST — Test mode (factory, tie low in application) |
| Broche 124 | TCLK — Test clock (factory) |
| Broche 125 | TMS — JTAG test mode select |
| Broche 126 | TCK — JTAG test clock |
| Broche 127 | TDI — JTAG test data in |
| Broche 128 | TDO — JTAG test data out |
| Broche 129 | TRST — JTAG test reset |
| Broche 130 | VCC — +5 V power |
| Broche 131 | A0 — Address bus bit 0 (LSB) |
| Broche 132 | LDS — Lower data strobe |
| Broche 133 | UDS — Upper data strobe |
| Broche 134 | GND — Ground |
| Broche 135 | PORTC0 — Port C bit 0 |
| Broche 136 | PORTC1 — Port C bit 1 |
| Broche 137 | PORTC2 — Port C bit 2 |
| Broche 138 | PORTC3 — Port C bit 3 |
| Broche 139 | PORTC4 — Port C bit 4 |
| Broche 140 | PORTC5 — Port C bit 5 |
| Broche 141 | PORTC6 — Port C bit 6 |
| Broche 142 | PORTC7 — Port C bit 7 |
| Broche 143 | PORTC8 — Port C bit 8 |
| Broche 144 | PORTC9 — Port C bit 9 |
Applications typiques
MC68302AG16C convient pour 6 applications: ISDN Terminal Adapter, Branch-Office Router, X.25 Packet Switch, Industrial Serial Concentrator, Frame Relay Access Device (FRAD), Legacy Telecom Backplane Controller.
ISDN Terminal Adapter
The MC68302AG16C is a classic fit for ISDN terminal adapters because its three on-chip Serial Communications Controllers natively support HDLC framing required by ISDN BRI and PRI channels. Each SCC can be assigned to a B or D channel, eliminating the need for an external HDLC controller and significantly reducing BOM cost. The integrated DMA engine moves packet data between the SCC FIFOs and external RAM without CPU intervention, freeing the 16 MHz M68000 core for upper-layer protocol processing. With 2 Kbytes of dual-port RAM for buffer descriptors, designers can queue multiple frames per channel while maintaining deterministic latency. Compared to a discrete M68000 + UART solution, the MC68302AG16C cuts PCB area and component count while preserving the established M68000 software toolchain.
Recommandé
Branch-Office Router
In branch-office router designs the MC68302AG16C's multi-protocol SCCs handle WAN-side HDLC/PPP/frame-relay links while one SMC manages the Ethernet or console UART interface. The 16 MHz M68000 core runs routing table lookups and IP/ICMP processing with predictable instruction timing, an advantage over speculative CPUs for real-time packet forwarding. Hardware bus arbitration allows direct connection to a downstream Ethernet MAC without glue logic. The integrated DMA offloads bulk packet movement, leaving CPU bandwidth for management and routing protocols. Its 24-bit address bus supports up to 16 Mbytes of DRAM plus flash, sufficient for routing tables in small-office installations.
Recommandé
X.25 Packet Switch
The MC68302AG16C's SCCs implement the LAPB data-link layer of X.25 directly in hardware, while the M68000 core executes the X.25 packet-level protocol and call setup state machine. The dual-port 2 Kbyte on-chip RAM is well suited for descriptor rings that queue frames per virtual circuit without external logic. Designers can dedicate one SCC to each X.25 link and a third to a higher-layer backbone interface. The chip's deterministic interrupt latency and bus arbitration timing allow X.25 timers and retransmission deadlines to be met reliably. Compared to soft-implemented HDLC on a generic MCU, the MC68302AG16C's hardware CRC and bit stuffing deliver higher link utilization at the same CPU clock.
Recommandé
Industrial Serial Concentrator
Multi-drop industrial protocols like Modbus, Profibus (via HDLC-like framing), and BISYNC can be carried concurrently on the MC68302AG16C's five serial channels, making it a serial concentrator for plant networks. The SMC channels provide slower-speed async or SPI-like interfaces for sensors, while the SCCs aggregate them into a backbone uplink. The integrated DMA moves large block transfers without burdening the CPU, and the parallel I/O port adds bit-banged signaling for legacy equipment. Commercial 0 to 70 C operation suits cabinet-mounted controllers. The 144-pin LQFP provides ample ground and power pins for the noisy industrial environment, simplifying PCB decoupling.
Recommandé
Frame Relay Access Device (FRAD)
Frame relay FRADs use the MC68302AG16C's HDLC-capable SCCs to terminate the frame-relay DLCI links and the M68000 core to run the FRAD management software. Hardware bit stuffing, CRC, and zero-insertion on each SCC eliminate the software HDLC tax seen on microcontrollers without serial engines. The DMA controller streams encapsulated frames into external DRAM while the CPU handles congestion management and SNMP. With three SCCs, a single MC68302AG16C can terminate multiple frame-relay PVCs without external bridges. The chip's 16 MHz throughput is sufficient for typical sub-E1 aggregate bandwidths of legacy FRAD installations.
Recommandé
Legacy Telecom Backplane Controller
Central-office backplanes in legacy telecom equipment use the MC68302AG16C as a per-line controller, where it manages signaling, alarm collection, and protocol conversion for multiple subscriber lines. The parallel I/O port monitors shelf alarms while the SCCs carry HDLC signaling to the upper-level controller. Hardware interrupt prioritization with seven priority levels allows deterministic handling of line-side events. The M68000 instruction set is well supported by long-lifecycle toolchains and field-proven compilers, which is critical for telecom gear with decades-long deployment horizons. The NRND status makes this part best suited for maintaining installed base rather than new product launches.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68302AG16C — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68302AG20C | MC68302AG25C | MC68302CAG16 | MC68302RC16C | MC68302AG16B |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-pin LQFP (20x20 mm) | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same | 144-pin LQFP (20x20 mm) - same |
| Maximum Clock Frequency | 16 MHz | 20 MHz | 25 MHz | 16 MHz | 16 MHz | 16 MHz |
| Core | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) | M68000 (32-bit PM) |
| Number of SCCs | 3 | 3 | 3 | 3 | 3 | 3 |
| Number of SMCs | 2 | 2 | 2 | 2 | 2 | 2 |
| On-chip RAM | 2 Kbytes | 2 Kbytes | 2 Kbytes | 2 Kbytes | 2 Kbytes | 2 Kbytes |
| Address Bus Width | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
Principaux différenciateurs
- Integrated multi-protocol SCCs on-chip (vs MC68331CAG16)
- M68000 software compatibility (vs Newer ColdFire MCF5282)
- 144-LQFP same-footprint upgradability (vs MC68302AG25C)
Notes de conception
The MC68302AG16C is a 5 V part; decouple each VCC pin with a 0.1 uF ceramic plus a 10 uF bulk tantalum placed within 25 mm of the package. The 144-pin LQFP provides multiple VCC and GND pins distributed around the package; route all VCC pins to the same 5 V plane and stitch a solid ground plane beneath the device. Add a 100 uF bulk cap near the board's 5 V entry point to absorb bus-step transients.
Route the 24-bit address bus and 16-bit data bus with matched trace lengths and 50 ohm characteristic impedance on a 4-layer stackup (signal/GND/VCC/signal). Keep bus traces short - the 16 MHz edge rates generate significant overshoot if traces exceed 50 mm. Place external DRAM chips adjacent to the dedicated RAS/CAS/DRAM pins to minimize skew on the row/column strobes.
Never leave the TEST pin floating - tie TEST directly to GND with a short trace, otherwise the part may enter factory test mode at reset. Always drive BR/BG through proper bus-arbitration logic when connecting a second bus master (e.g., a companion DMA controller), and assert BGACK only after the requesting master has been granted. Do not exceed the 16 MHz CLKIN specification - the AG16C speed grade is not warranted for 20 or 25 MHz operation.
Informations de conformité
RoHS, REACH, and lead-free status were not explicitly listed in the verified distributor listings we surveyed. As a 1990s commercial-temperature plastic LQFP, the part may or may not be lead-free finished - request the latest material declaration directly from NXP or your distributor before RoHS-restricted designs.
