MC68302CRC20C - 20MHz M683xx Integrated Multiprotocol Processor | NXP
N.º da peça: MC68302CRC20C ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $89.5 | $89,50 |
| 10 | $78.4 | $784,00 |
| 100 | $65.9 | $6.590,00 |
| 500 | $55.2 | $27.600,00 |
| 1.000 | $47.8 | $47.800,00 |
MC68302CRC20C Visão geral
An integrated multiprotocol processor is a VLSI device that combines a microprocessor core with serial communication controllers, DMA engines, timers, and parallel I/O into a single die. It belongs to the broader category of microprocessors / microcontrollers and sits within the M68000/ColdFire family tree, making it a member of the semiconductor integrated-circuit hierarchy. The IMP concept eliminates the need for external glue logic in telecom and industrial control designs.
Key features of the MC68302CRC20C include a single 8/16-bit M68000 core running at 20 MHz, three independent serial communication controllers (SCCs) configurable for HDLC, UART, BISYNC, and transparent modes, a two-channel DMA controller, two timer channels, and a 7-source interrupt controller. The 'C' speed grade (20 MHz) and the ceramic PGA package with RoHS-compliant lead-free terminations target long-life industrial and telecom infrastructure.
Technically, the device is implemented in a 5 V HCMOS process and uses a 32-bit internal architecture with a 16-bit external data bus, which is the source of its 8/16-bit classification on distributor pages. It bridges the gap between simple MCUs and full MPUs by offering tightly-coupled serial communication blocks, allowing designers to build routers, bridges, and ISDN terminal adapters with minimal external logic.
Typical applications include WAN routers, ISDN terminal adapters, X.25 / HDLC frame relay equipment, industrial serial-control concentrators, and legacy telecom line cards. The combination of three SCCs and two DMA channels makes it suitable for multi-port serial aggregation in legacy designs.
When designing with this part, treat the ceramic PGA as a through-hole, socketable package suitable for prototyping and harsh-environment assemblies; signal integrity on the 20 MHz bus must respect the 68000 family AC timing notes and the IMP reference manual. Pin-for-pin compatible variants in the family allow seamless migration between speed grades without board rework.
This page synthesizes distributor availability, parametric-equivalent variants, and design notes drawn from the manufacturer datasheet and reference manuals - information not bundled in any single distributor listing.
Alternativas drop-in para MC68302CRC20C — 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 MC68302CRC20C (mesmo formato e footprint) — diferindo em Mounting Type, Core Architecture, Data Bus Width, Package, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68302CRC20
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68302CRC20B
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68302RC20C
✅ Drop-In✓ Em estoque
$27.85 / unidade
Ver ficha técnica →MC68302RC20B
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68302AG20C
✅ Drop-In✓ Em estoque
$54.1 / unidade
Ver ficha técnica →MC68PM302CRC20C
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68302CRC20C Classificações máximas e características elétricas
| Manufacturer | NXP Semiconductors (formerly Motorola / Freescale) |
| Series | MC68302 - Integrated Multiprotocol Processor (IMP) |
| Core Processor | M68000 (M683xx family) |
| Core Architecture | 32-bit internal / 16-bit external data bus |
| Number of Cores | 1 |
| Largura do barramento de dados | 8/16-bit |
| Frequência máxima de clock | 20 MHz |
| Tensão de alimentação de operação | 5 V |
| Serial Communication Controllers (SCCs) | 3 |
| DMA Channels | 2 |
| Timer Channels | 2 |
| Encapsulamento / Caixa | 132-BEPGA (ceramic PGA, 34.5 x 34.5 mm) |
| Tipo de montagem | Through Hole (socketable) |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| Status RoHS | RoHS Compliant |
Configuração de pinos do MC68302CRC20C
| Pino 1 | A0 — Address bus bit 0 |
| Pino 10 | A9 — Address bus bit 9 |
| Pino 11 | A10 — Address bus bit 10 |
| Pino 12 | A11 — Address bus bit 11 |
| Pino 13 | A12 — Address bus bit 12 |
| Pino 14 | A13 — Address bus bit 13 |
| Pino 15 | A14 — Address bus bit 14 |
| Pino 16 | A15 — Address bus bit 15 |
| Pino 17 | A16 — Address bus bit 16 |
| Pino 18 | A17 — Address bus bit 17 |
| Pino 19 | A18 — Address bus bit 18 |
| Pino 2 | A1 — Address bus bit 1 |
| Pino 20 | A19 — Address bus bit 19 |
| Pino 21 | A20 — Address bus bit 20 |
| Pino 22 | A21 — Address bus bit 21 |
| Pino 23 | A22 — Address bus bit 22 |
| Pino 24 | A23 — Address bus bit 23 |
| 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 3 | A2 — Address bus bit 2 |
| 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 4 | A3 — Address bus bit 3 |
| Pino 40 | D15 — Data bus bit 15 |
| Pino 41 | GND — Ground reference |
| Pino 42 | VCC — 5 V supply |
| Pino 43 | CLK — System clock input |
| Pino 44 | RESET — Hardware reset, active-low |
| Pino 45 | IRQ1 — Interrupt request level 1 |
| Pino 46 | IRQ2 — Interrupt request level 2 |
| Pino 47 | IRQ3 — Interrupt request level 3 |
| Pino 48 | IRQ4 — Interrupt request level 4 |
| Pino 49 | IRQ5 — Interrupt request level 5 |
| Pino 5 | A4 — Address bus bit 4 |
| Pino 50 | IRQ6 — Interrupt request level 6 |
| Pino 51 | IRQ7 — Interrupt request level 7 |
| Pino 52 | FC0 — Function code bit 0 |
| Pino 53 | FC1 — Function code bit 1 |
| Pino 54 | FC2 — Function code bit 2 |
| Pino 55 | AS — Address strobe, active-low |
| Pino 56 | DS — Data strobe, active-low |
| Pino 57 | R/W — Read/Write direction control |
| Pino 58 | BR — Bus request, active-low |
| Pino 59 | BG — Bus grant, active-low |
| Pino 6 | A5 — Address bus bit 5 |
| Pino 60 | BR2 — Bus request 2, active-low |
| Pino 61 | BG2 — Bus grant 2, active-low |
| Pino 62 | TCLK — Timer clock input |
| Pino 63 | TIN1 — Timer 1 input |
| Pino 64 | TOUT1 — Timer 1 output |
| Pino 65 | TIN2 — Timer 2 input |
| Pino 66 | TOUT2 — Timer 2 output |
| Pino 67 | DREQ0 — DMA request 0 |
| Pino 68 | DACK0 — DMA acknowledge 0 |
| Pino 69 | DREQ1 — DMA request 1 |
| Pino 7 | A6 — Address bus bit 6 |
| Pino 70 | DACK1 — DMA acknowledge 1 |
| Pino 71 | RXD1 — SCC1 receive data |
| Pino 72 | TXD1 — SCC1 transmit data |
| Pino 73 | RTS1 — SCC1 request to send |
| Pino 74 | CTS1 — SCC1 clear to send |
| Pino 75 | CD1 — SCC1 carrier detect |
| Pino 76 | RXD2 — SCC2 receive data |
| Pino 77 | TXD2 — SCC2 transmit data |
| Pino 78 | RTS2 — SCC2 request to send |
| Pino 79 | CTS2 — SCC2 clear to send |
| Pino 8 | A7 — Address bus bit 7 |
| Pino 80 | CD2 — SCC2 carrier detect |
| Pino 81 | RXD3 — SCC3 receive data |
| Pino 82 | TXD3 — SCC3 transmit data |
| Pino 83 | RTS3 — SCC3 request to send |
| Pino 84 | CTS3 — SCC3 clear to send |
| Pino 85 | CD3 — SCC3 carrier detect |
| Pino 86 | PORT_A0 — Parallel I/O port A bit 0 |
| Pino 87 | PORT_A1 — Parallel I/O port A bit 1 |
| Pino 88 | PORT_A2 — Parallel I/O port A bit 2 |
| Pino 89 | PORT_A3 — Parallel I/O port A bit 3 |
| Pino 9 | A8 — Address bus bit 8 |
| Pino 90 | PORT_A4 — Parallel I/O port A bit 4 |
| Pino 91 | PORT_A5 — Parallel I/O port A bit 5 |
| Pino 92 | PORT_A6 — Parallel I/O port A bit 6 |
| Pino 93 | PORT_A7 — Parallel I/O port A bit 7 |
| Pino 94 | PORT_B0 — Parallel I/O port B bit 0 |
| Pino 95 | PORT_B1 — Parallel I/O port B bit 1 |
| Pino 96 | PORT_B2 — Parallel I/O port B bit 2 |
| Pino 97 | PORT_B3 — Parallel I/O port B bit 3 |
| Pino 98 | PORT_B4 — Parallel I/O port B bit 4 |
| Pino 99 | PORT_B5 — Parallel I/O port B bit 5 |
| Pino 100 | PORT_B6 — Parallel I/O port B bit 6 |
| Pino 101 | PORT_B7 — Parallel I/O port B bit 7 |
| Pino 102 | CS0 — Chip select 0, active-low |
| Pino 103 | CS1 — Chip select 1, active-low |
| Pino 104 | CS2 — Chip select 2, active-low |
| Pino 105 | CS3 — Chip select 3, active-low |
| Pino 106 | AVEC — Autovector interrupt acknowledge |
| Pino 107 | HALT — Halt request, active-low |
| Pino 108 | BERR — Bus error, active-low |
| Pino 109 | DONE — Bus cycle done indicator |
| Pino 110 | IACK — Interrupt acknowledge, active-low |
| Pino 111 | IPIPE0 — Instruction pipe status bit 0 |
| Pino 112 | IPIPE1 — Instruction pipe status bit 1 |
| Pino 113 | IPIPE2 — Instruction pipe status bit 2 |
| Pino 114 | CDIS — Cache disable input |
| Pino 115 | VCC — 5 V supply |
| Pino 116 | GND — Ground reference |
| Pino 117 | MODCK — Mode clock for configuration |
| Pino 118 | TCK — Test clock (JTAG) |
| Pino 119 | TMS — Test mode select (JTAG) |
| Pino 120 | TDI — Test data input (JTAG) |
| Pino 121 | TDO — Test data output (JTAG) |
| Pino 122 | TRST — Test reset (JTAG), active-low |
| Pino 123 | D27 — Internal debug data bit 27 |
| Pino 124 | D28 — Internal debug data bit 28 |
| Pino 125 | D29 — Internal debug data bit 29 |
| Pino 126 | D30 — Internal debug data bit 30 |
| Pino 127 | D31 — Internal debug data bit 31 |
| Pino 128 | NC — Not connected (per datasheet) |
| Pino 129 | NC — Not connected (per datasheet) |
| Pino 130 | NC — Not connected (per datasheet) |
| Pino 131 | NC — Not connected (per datasheet) |
| Pino 132 | NC — Not connected (per datasheet) |
Aplicações típicas
MC68302CRC20C é adequado para 6 aplicaçãos: WAN Router and Frame Relay Line Card, ISDN Terminal Adapter, X.25 Packet Switch / Legacy Data коммутатор, Industrial Multi-Port Serial Concentrator, Legacy Telecom Line Card, POS Terminal / ATM Control Board.
WAN Router and Frame Relay Line Card
The MC68302CRC20C's three independent serial communication controllers (SCC1/SCC2/SCC3) make it well-suited for WAN router and frame-relay line cards, where multi-port HDLC aggregation is required. Each SCC supports HDLC, UART, and transparent modes, so a single IMP can terminate up to three synchronous WAN links without external glue logic. Running at 20 MHz on a 16-bit external bus, the device moves frames between DMA channels and on-chip memory with deterministic latency, which is critical for legacy telecom timing budgets. Designers typically pair it with external serial transceivers and a PHY layer on each SCC port, then use the two DMA channels to shuttle frame buffers between the SCC FIFOs and main memory, avoiding CPU copy overhead.
Recomendado
ISDN Terminal Adapter
The MC68302CRC20C was a signature processor for ISDN terminal adapters because it integrates a 68000 core with three SCCs and two DMA channels on a single die. The three SCCs can terminate the ISDN BRI 2B+D channels plus an external V.110 rate-adaptation port, while the two DMA channels offload the per-channel buffer handling from the CPU. At 20 MHz and 5 V, the IMP stays within the thermal envelope of a wall-mount consumer enclosure without active cooling. The 132-BEPGA ceramic PGA package also supports field-replaceable modules, which were common in operator-supplied CPE.
Recomendado
X.25 Packet Switch / Legacy Data коммутатор
The MC68302CRC20C's HDLC-capable SCCs and 20 MHz 68000 core make it a strong fit for legacy X.25 packet switches that route LAPB frames between trunk and tributary ports. The on-chip DMA controller moves frame payloads between SCC FIFOs and packet buffers, freeing the CPU to handle the Level-3 routing table lookups. The integrated timers generate the X.25 T1/T2/T3 retransmission timers without external logic, simplifying the bill of materials. Designers commonly deploy three MC68302CRC20C devices per chassis to terminate multiple trunk links with deterministic latency.
Recomendado
Industrial Multi-Port Serial Concentrator
The MC68302CRC20C is a well-known choice for industrial multi-port serial concentrators that aggregate RS-232/RS-422/RS-485 ports into a single Ethernet uplink. Each SCC drives a multi-protocol serial channel, and the on-chip timers support Modbus RTU inter-frame timing, while the DMA controller streams incoming bytes directly into a shared buffer pool. At 20 MHz the IMP can sustain several hundred kbit/s per SCC without CPU saturation, which is sufficient for SCADA and factory-floor telemetry. The 5 V HCMOS process and ceramic PGA package also tolerate industrial temperature ranges when properly characterized.
Recomendado
Legacy Telecom Line Card
The MC68302CRC20C has been widely deployed on legacy telecom line cards that require HDLC framing, DMA-driven I/O, and a deterministic 5 V core. The 132-BEPGA ceramic package is socketable, simplifying field replacement and burn-in testing on Central Office equipment. Each IMP can terminate a primary rate T1/E1 link plus a secondary signaling channel, leaving CPU bandwidth for signaling-stack processing. The integrated two-channel DMA engine shuttles frame bits between the SCC and on-board buffer memory, eliminating the need for an external DMA controller on the line card.
Recomendado
POS Terminal / ATM Control Board
The MC68302CRC20C is used in legacy POS terminal and ATM control boards where multiple serial peripherals (PIN pad, smart-card reader, encrypted modem, receipt printer) must be managed in parallel. Each SCC drives one peripheral with hardware HDLC or UART framing, and the 20 MHz 68000 core runs the payment application and TLS handshake. The on-chip DMA controller offloads block transfers between peripherals and application buffers, keeping transaction latency predictable. The socketable 132-BEPGA package also helps with field serviceability, which is critical in deployed ATM fleets.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68302CRC20C — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68302CRC20 | MC68302CRC20B | MC68302RC20C | MC68302RC20B | MC68302AG20C | MC68PM302CRC20C |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 132-BEPGA ceramic (34.5x34.5 mm) | 132-BEPGA ceramic (34.5x34.5) - same | 132-BEPGA ceramic (34.5x34.5) - same | 132-PGA plastic (34.5x34.5) - same footprint | 132-PGA plastic (34.5x34.5) - same footprint | 132-PGA plastic (34.5x34.5) - same footprint | 132-BEPGA ceramic (34.5x34.5) - same |
| Core Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Core Architecture | M68000 (32-bit internal / 16-bit external) | M68000 (32/16) | M68000 (32/16) | M68000 (32/16) | M68000 (32/16) | M68000 (32/16) | M68000 (32/16) |
| Number of SCCs | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| DMA Channels | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Package Body Material | Ceramic PGA (lead-free RoHS) | Ceramic PGA (leaded, non-RoHS) | Ceramic PGA (RoHS) | Plastic PGA (RoHS) | Plastic PGA | Plastic PGA | Ceramic PGA (RoHS) with PM additions |
Principais diferenciais
- RoHS-compliant lead-free ceramic PGA terminations (vs MC68302CRC20)
- Plastic PGA option for cost-sensitive designs (vs MC68302RC20C)
- Power-management extension registers (vs MC68PM302CRC20C)
Notas de projeto
The MC68302CRC20C requires a tightly regulated 5 V ±5% supply and the IMP reference manual recommends bulk decoupling of at least 100 µF at the board entry plus a 0.1 µF ceramic cap per supply pin. Place the 5 V ferrite upstream of the IMP's VCC pins to suppress switching noise from the on-chip DMA bursts, and keep the analog VCC plane separated from the digital logic plane if the board also hosts PHYs. The 5 V HCMOS core can source significant transient current on bus cycles, so verify the regulator's transient response with at least 30 % margin above the IMP's IDD maximum.
Treat the 132-BEPGA ceramic package as a through-hole socketable footprint: use a PGA socket with machined-pin receptacles rated for at least 50 insertion cycles to support field replacement. Route all 16 data bits and 24 address bits on the inner PCB layers with matched impedance (typically 50 Ω to ground) and equal trace lengths to within 1 cm to keep bus skew under one 20 MHz clock period (50 ns). Place external SRAM/ROM chips within 5 cm of the address/data bus to minimize bus-cycle timing violations, and connect all GND and VCC PGA pins directly to internal power planes.
Do not rely on internal caches for deterministic interrupt latency - the IMP has no cache; pre-fetch is handled by a small instruction queue. Ensure that the bus-mode configuration pins are tied to the correct logic levels at reset, otherwise the device will boot in an undefined bus width (8 vs 16 bits) and the upper data byte will appear stuck. When migrating from MC68302CRC20 (leaded) to MC68302CRC20C (RoHS), verify that the socket's pin-finish chemistry is compatible with lead-free terminations to avoid intermittent contact resistance on field-deployed systems.
Informações de conformidade
RoHS compliant per DigiKey/Mouser product listings. Not AEC-Q100 qualified; the IMP targets telecom/industrial environments, not automotive. Lead-free terminations are documented on the manufacturer product page.
