MC68302AG16C - 16MHz M68000 Integrated Comm Processor | NXP
N.º da peça: MC68302AG16C ✗ Fim de vida| Qtd. | Preço unitário | 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 Visão geral
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.
Alternativas drop-in para MC68302AG16C — 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 MC68302AG16C (mesmo formato e footprint) — diferindo em Core Architecture, DMA Channels, Data Bus Width, RoHS Status, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68302AG20C
✅ Drop-In✓ Em estoque
$54.1 / unidade
Ver ficha técnica →MC68302AG25C
✅ Drop-In✓ Em estoque
$16.4 / unidade
Ver ficha técnica →MC68302CAG16
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MC68302RC16C
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$42.5 / unidade
Ver ficha técnica →MC68302AG16B
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MC68302AG16C Classificações máximas e características elétricas
| Core Architecture | M68000 (32-bit programming model, 8/16-bit external data bus) |
| Core Family | M683xx / ColdFire-class M68000 |
| Frequência máxima de clock | 16 MHz |
| Tensão de alimentação de operação | 5 V |
| Encapsulamento | 144-pin LQFP (20x20 mm) |
| Tipo de montagem | 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 |
| Faixa de temperatura de operação | 0C to +70C (commercial) |
| Tray Packaging | Tray |
Configuração de pinos do MC68302AG16C
| Pino 1 | A1 — Address bus bit 1 |
| Pino 2 | A2 — Address bus bit 2 |
| Pino 3 | A3 — Address bus bit 3 |
| Pino 4 | A4 — Address bus bit 4 |
| Pino 5 | A5 — Address bus bit 5 |
| Pino 6 | A6 — Address bus bit 6 |
| Pino 7 | A7 — Address bus bit 7 |
| Pino 8 | A8 — Address bus bit 8 |
| Pino 9 | A9 — Address bus bit 9 |
| Pino 10 | A10 — Address bus bit 10 |
| Pino 11 | A11 — Address bus bit 11 |
| Pino 12 | A12 — Address bus bit 12 |
| Pino 13 | A13 — Address bus bit 13 |
| Pino 14 | A14 — Address bus bit 14 |
| Pino 15 | A15 — Address bus bit 15 |
| Pino 16 | A16 — Address bus bit 16 |
| Pino 17 | A17 — Address bus bit 17 |
| Pino 18 | A18 — Address bus bit 18 |
| Pino 19 | A19 — Address bus bit 19 |
| Pino 20 | A20 — Address bus bit 20 |
| Pino 21 | A21 — Address bus bit 21 |
| Pino 22 | A22 — Address bus bit 22 |
| Pino 23 | A23 — Address bus bit 23 |
| Pino 24 | VCC — +5 V power |
| Pino 25 | D0 — Data bus bit 0 |
| Pino 26 | D1 — Data bus bit 1 |
| Pino 27 | D2 — Data bus bit 2 |
| Pino 28 | D3 — Data bus bit 3 |
| Pino 29 | D4 — Data bus bit 4 |
| Pino 30 | D5 — Data bus bit 5 |
| Pino 31 | D6 — Data bus bit 6 |
| Pino 32 | D7 — Data bus bit 7 |
| Pino 33 | D8 — Data bus bit 8 |
| Pino 34 | D9 — Data bus bit 9 |
| Pino 35 | D10 — Data bus bit 10 |
| Pino 36 | D11 — Data bus bit 11 |
| Pino 37 | D12 — Data bus bit 12 |
| Pino 38 | D13 — Data bus bit 13 |
| Pino 39 | D14 — Data bus bit 14 |
| Pino 40 | D15 — Data bus bit 15 |
| Pino 41 | GND — Ground |
| Pino 42 | CS0 — Chip select 0 |
| Pino 43 | CS1 — Chip select 1 |
| Pino 44 | CS2 — Chip select 2 |
| Pino 45 | CS3 — Chip select 3 |
| Pino 46 | CS4 — Chip select 4 |
| Pino 47 | CS5 — Chip select 5 |
| Pino 48 | BR — Bus request |
| Pino 49 | BG — Bus grant |
| Pino 50 | BGACK — Bus grant acknowledge |
| Pino 51 | RESET — Hardware reset (active low) |
| Pino 52 | HALT — Halt (active low) |
| Pino 53 | CLKIN — Clock input |
| Pino 54 | CLKOUT — Clock output |
| Pino 55 | IPL0 — Interrupt priority level 0 |
| Pino 56 | IPL1 — Interrupt priority level 1 |
| Pino 57 | IPL2 — Interrupt priority level 2 |
| Pino 58 | AS — Address strobe |
| Pino 59 | DS — Data strobe |
| Pino 60 | R/W — Read/Write control |
| Pino 61 | DTACK — Data transfer acknowledge |
| Pino 62 | AVEC — Autovector |
| Pino 63 | BERR — Bus error |
| Pino 64 | VCC — +5 V power |
| Pino 65 | SCC1_RXD — SCC1 receive data |
| Pino 66 | SCC1_TXD — SCC1 transmit data |
| Pino 67 | SCC1_RTS — SCC1 request to send |
| Pino 68 | SCC1_CTS — SCC1 clear to send |
| Pino 69 | SCC1_CD — SCC1 carrier detect |
| Pino 70 | SCC1_CTS_BRG — SCC1 CTS / baud-rate generator |
| Pino 71 | SCC2_RXD — SCC2 receive data |
| Pino 72 | SCC2_TXD — SCC2 transmit data |
| Pino 73 | SCC2_RTS — SCC2 request to send |
| Pino 74 | SCC2_CTS — SCC2 clear to send |
| Pino 75 | SCC2_CD — SCC2 carrier detect |
| Pino 76 | GND — Ground |
| Pino 77 | SCC3_RXD — SCC3 receive data |
| Pino 78 | SCC3_TXD — SCC3 transmit data |
| Pino 79 | SCC3_RTS — SCC3 request to send |
| Pino 80 | SCC3_CTS — SCC3 clear to send |
| Pino 81 | SCC3_CD — SCC3 carrier detect |
| Pino 82 | SMC1_RXD — SMC1 receive data |
| Pino 83 | SMC1_TXD — SMC1 transmit data |
| Pino 84 | SMC2_RXD — SMC2 receive data |
| Pino 85 | SMC2_TXD — SMC2 transmit data |
| Pino 86 | VCC — +5 V power |
| Pino 87 | P0 — Parallel I/O port bit 0 |
| Pino 88 | P1 — Parallel I/O port bit 1 |
| Pino 89 | P2 — Parallel I/O port bit 2 |
| Pino 90 | P3 — Parallel I/O port bit 3 |
| Pino 91 | P4 — Parallel I/O port bit 4 |
| Pino 92 | P5 — Parallel I/O port bit 5 |
| Pino 93 | P6 — Parallel I/O port bit 6 |
| Pino 94 | P7 — Parallel I/O port bit 7 |
| Pino 95 | TIN1 — Timer 1 input |
| Pino 96 | TOUT1 — Timer 1 output |
| Pino 97 | TIN2 — Timer 2 input |
| Pino 98 | TOUT2 — Timer 2 output |
| Pino 99 | DREQ0 — DMA request 0 |
| Pino 100 | DACK0 — DMA acknowledge 0 |
| Pino 101 | DREQ1 — DMA request 1 |
| Pino 102 | DACK1 — DMA acknowledge 1 |
| Pino 103 | DONE — DMA done |
| Pino 104 | GND — Ground |
| Pino 105 | RAS0 — DRAM row address strobe 0 |
| Pino 106 | RAS1 — DRAM row address strobe 1 |
| Pino 107 | CAS0 — DRAM column address strobe 0 |
| Pino 108 | CAS1 — DRAM column address strobe 1 |
| Pino 109 | WE — Write enable |
| Pino 110 | OE — Output enable |
| Pino 111 | VCC — +5 V power |
| Pino 112 | FC0 — Function code 0 |
| Pino 113 | FC1 — Function code 1 |
| Pino 114 | FC2 — Function code 2 |
| Pino 115 | RMC — Read-modify-write |
| Pino 116 | SIZ0 — Transfer size 0 |
| Pino 117 | SIZ1 — Transfer size 1 |
| Pino 118 | DBEN — Data bus enable |
| Pino 119 | FREEZE — Freeze output (background debug) |
| Pino 120 | IPIPE0 — Instruction pipe 0 (debug) |
| Pino 121 | IPIPE1 — Instruction pipe 1 (debug) |
| Pino 122 | GND — Ground |
| Pino 123 | TEST — Test mode (factory, tie low in application) |
| Pino 124 | TCLK — Test clock (factory) |
| Pino 125 | TMS — JTAG test mode select |
| Pino 126 | TCK — JTAG test clock |
| Pino 127 | TDI — JTAG test data in |
| Pino 128 | TDO — JTAG test data out |
| Pino 129 | TRST — JTAG test reset |
| Pino 130 | VCC — +5 V power |
| Pino 131 | A0 — Address bus bit 0 (LSB) |
| Pino 132 | LDS — Lower data strobe |
| Pino 133 | UDS — Upper data strobe |
| Pino 134 | GND — Ground |
| Pino 135 | PORTC0 — Port C bit 0 |
| Pino 136 | PORTC1 — Port C bit 1 |
| Pino 137 | PORTC2 — Port C bit 2 |
| Pino 138 | PORTC3 — Port C bit 3 |
| Pino 139 | PORTC4 — Port C bit 4 |
| Pino 140 | PORTC5 — Port C bit 5 |
| Pino 141 | PORTC6 — Port C bit 6 |
| Pino 142 | PORTC7 — Port C bit 7 |
| Pino 143 | PORTC8 — Port C bit 8 |
| Pino 144 | PORTC9 — Port C bit 9 |
Aplicações típicas
MC68302AG16C é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68302AG16C — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Integrated multi-protocol SCCs on-chip (vs MC68331CAG16)
- M68000 software compatibility (vs Newer ColdFire MCF5282)
- 144-LQFP same-footprint upgradability (vs MC68302AG25C)
Notas de projeto
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.
Informações de conformidade
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.
