MC68302CRC20C - 20MHz M683xx Integrated Multiprotocol Processor | NXP
Teilenummer: MC68302CRC20C ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 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 Übersicht
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.
Drop-in-Alternativen für MC68302CRC20C – 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 MC68302CRC20C (gleiche Bauform und Footprint) – abweichend in Mounting Type, Core Architecture, Data Bus Width, Package, RoHS Status.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC68302CRC20
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68302CRC20B
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68302RC20C
✅ Drop-In✓ Auf Lager
$27.85 / Stück
Datenblatt ansehen →MC68302RC20B
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68302AG20C
✅ Drop-In✓ Auf Lager
$54.1 / Stück
Datenblatt ansehen →MC68PM302CRC20C
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68302CRC20C Grenzwerte & elektrische Eigenschaften
| 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 |
| Datenbusbreite | 8/16-bit |
| Maximale Taktfrequenz | 20 MHz |
| Betriebsversorgungsspannung | 5 V |
| Serial Communication Controllers (SCCs) | 3 |
| DMA Channels | 2 |
| Timer Channels | 2 |
| Gehäuse / Bauform | 132-BEPGA (ceramic PGA, 34.5 x 34.5 mm) |
| Montageart | Through Hole (socketable) |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| RoHS-Status | RoHS Compliant |
MC68302CRC20C Pin-Konfiguration
| Pin 1 | A0 — Address bus bit 0 |
| Pin 10 | A9 — Address bus bit 9 |
| Pin 11 | A10 — Address bus bit 10 |
| Pin 12 | A11 — Address bus bit 11 |
| Pin 13 | A12 — Address bus bit 12 |
| Pin 14 | A13 — Address bus bit 13 |
| Pin 15 | A14 — Address bus bit 14 |
| Pin 16 | A15 — Address bus bit 15 |
| Pin 17 | A16 — Address bus bit 16 |
| Pin 18 | A17 — Address bus bit 17 |
| Pin 19 | A18 — Address bus bit 18 |
| Pin 2 | A1 — Address bus bit 1 |
| Pin 20 | A19 — Address bus bit 19 |
| Pin 21 | A20 — Address bus bit 20 |
| Pin 22 | A21 — Address bus bit 21 |
| Pin 23 | A22 — Address bus bit 22 |
| Pin 24 | A23 — Address bus bit 23 |
| Pin 25 | D0 — Data bus bit 0 |
| Pin 26 | D1 — Data bus bit 1 |
| Pin 27 | D2 — Data bus bit 2 |
| Pin 28 | D3 — Data bus bit 3 |
| Pin 29 | D4 — Data bus bit 4 |
| Pin 3 | A2 — Address bus bit 2 |
| Pin 30 | D5 — Data bus bit 5 |
| Pin 31 | D6 — Data bus bit 6 |
| Pin 32 | D7 — Data bus bit 7 |
| Pin 33 | D8 — Data bus bit 8 |
| Pin 34 | D9 — Data bus bit 9 |
| Pin 35 | D10 — Data bus bit 10 |
| Pin 36 | D11 — Data bus bit 11 |
| Pin 37 | D12 — Data bus bit 12 |
| Pin 38 | D13 — Data bus bit 13 |
| Pin 39 | D14 — Data bus bit 14 |
| Pin 4 | A3 — Address bus bit 3 |
| Pin 40 | D15 — Data bus bit 15 |
| Pin 41 | GND — Ground reference |
| Pin 42 | VCC — 5 V supply |
| Pin 43 | CLK — System clock input |
| Pin 44 | RESET — Hardware reset, active-low |
| Pin 45 | IRQ1 — Interrupt request level 1 |
| Pin 46 | IRQ2 — Interrupt request level 2 |
| Pin 47 | IRQ3 — Interrupt request level 3 |
| Pin 48 | IRQ4 — Interrupt request level 4 |
| Pin 49 | IRQ5 — Interrupt request level 5 |
| Pin 5 | A4 — Address bus bit 4 |
| Pin 50 | IRQ6 — Interrupt request level 6 |
| Pin 51 | IRQ7 — Interrupt request level 7 |
| Pin 52 | FC0 — Function code bit 0 |
| Pin 53 | FC1 — Function code bit 1 |
| Pin 54 | FC2 — Function code bit 2 |
| Pin 55 | AS — Address strobe, active-low |
| Pin 56 | DS — Data strobe, active-low |
| Pin 57 | R/W — Read/Write direction control |
| Pin 58 | BR — Bus request, active-low |
| Pin 59 | BG — Bus grant, active-low |
| Pin 6 | A5 — Address bus bit 5 |
| Pin 60 | BR2 — Bus request 2, active-low |
| Pin 61 | BG2 — Bus grant 2, active-low |
| Pin 62 | TCLK — Timer clock input |
| Pin 63 | TIN1 — Timer 1 input |
| Pin 64 | TOUT1 — Timer 1 output |
| Pin 65 | TIN2 — Timer 2 input |
| Pin 66 | TOUT2 — Timer 2 output |
| Pin 67 | DREQ0 — DMA request 0 |
| Pin 68 | DACK0 — DMA acknowledge 0 |
| Pin 69 | DREQ1 — DMA request 1 |
| Pin 7 | A6 — Address bus bit 6 |
| Pin 70 | DACK1 — DMA acknowledge 1 |
| Pin 71 | RXD1 — SCC1 receive data |
| Pin 72 | TXD1 — SCC1 transmit data |
| Pin 73 | RTS1 — SCC1 request to send |
| Pin 74 | CTS1 — SCC1 clear to send |
| Pin 75 | CD1 — SCC1 carrier detect |
| Pin 76 | RXD2 — SCC2 receive data |
| Pin 77 | TXD2 — SCC2 transmit data |
| Pin 78 | RTS2 — SCC2 request to send |
| Pin 79 | CTS2 — SCC2 clear to send |
| Pin 8 | A7 — Address bus bit 7 |
| Pin 80 | CD2 — SCC2 carrier detect |
| Pin 81 | RXD3 — SCC3 receive data |
| Pin 82 | TXD3 — SCC3 transmit data |
| Pin 83 | RTS3 — SCC3 request to send |
| Pin 84 | CTS3 — SCC3 clear to send |
| Pin 85 | CD3 — SCC3 carrier detect |
| Pin 86 | PORT_A0 — Parallel I/O port A bit 0 |
| Pin 87 | PORT_A1 — Parallel I/O port A bit 1 |
| Pin 88 | PORT_A2 — Parallel I/O port A bit 2 |
| Pin 89 | PORT_A3 — Parallel I/O port A bit 3 |
| Pin 9 | A8 — Address bus bit 8 |
| Pin 90 | PORT_A4 — Parallel I/O port A bit 4 |
| Pin 91 | PORT_A5 — Parallel I/O port A bit 5 |
| Pin 92 | PORT_A6 — Parallel I/O port A bit 6 |
| Pin 93 | PORT_A7 — Parallel I/O port A bit 7 |
| Pin 94 | PORT_B0 — Parallel I/O port B bit 0 |
| Pin 95 | PORT_B1 — Parallel I/O port B bit 1 |
| Pin 96 | PORT_B2 — Parallel I/O port B bit 2 |
| Pin 97 | PORT_B3 — Parallel I/O port B bit 3 |
| Pin 98 | PORT_B4 — Parallel I/O port B bit 4 |
| Pin 99 | PORT_B5 — Parallel I/O port B bit 5 |
| Pin 100 | PORT_B6 — Parallel I/O port B bit 6 |
| Pin 101 | PORT_B7 — Parallel I/O port B bit 7 |
| Pin 102 | CS0 — Chip select 0, active-low |
| Pin 103 | CS1 — Chip select 1, active-low |
| Pin 104 | CS2 — Chip select 2, active-low |
| Pin 105 | CS3 — Chip select 3, active-low |
| Pin 106 | AVEC — Autovector interrupt acknowledge |
| Pin 107 | HALT — Halt request, active-low |
| Pin 108 | BERR — Bus error, active-low |
| Pin 109 | DONE — Bus cycle done indicator |
| Pin 110 | IACK — Interrupt acknowledge, active-low |
| Pin 111 | IPIPE0 — Instruction pipe status bit 0 |
| Pin 112 | IPIPE1 — Instruction pipe status bit 1 |
| Pin 113 | IPIPE2 — Instruction pipe status bit 2 |
| Pin 114 | CDIS — Cache disable input |
| Pin 115 | VCC — 5 V supply |
| Pin 116 | GND — Ground reference |
| Pin 117 | MODCK — Mode clock for configuration |
| Pin 118 | TCK — Test clock (JTAG) |
| Pin 119 | TMS — Test mode select (JTAG) |
| Pin 120 | TDI — Test data input (JTAG) |
| Pin 121 | TDO — Test data output (JTAG) |
| Pin 122 | TRST — Test reset (JTAG), active-low |
| Pin 123 | D27 — Internal debug data bit 27 |
| Pin 124 | D28 — Internal debug data bit 28 |
| Pin 125 | D29 — Internal debug data bit 29 |
| Pin 126 | D30 — Internal debug data bit 30 |
| Pin 127 | D31 — Internal debug data bit 31 |
| Pin 128 | NC — Not connected (per datasheet) |
| Pin 129 | NC — Not connected (per datasheet) |
| Pin 130 | NC — Not connected (per datasheet) |
| Pin 131 | NC — Not connected (per datasheet) |
| Pin 132 | NC — Not connected (per datasheet) |
Typische Anwendungen
MC68302CRC20C ist geeignet für 6 Anwendungs: 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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC68302CRC20C – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 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 |
Wichtigste Unterscheidungsmerkmale
- RoHS-compliant lead-free ceramic PGA terminations (vs. MC68302CRC20)
- Plastic PGA option for cost-sensitive designs (vs. MC68302RC20C)
- Power-management extension registers (vs. MC68PM302CRC20C)
Designhinweise
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.
Compliance-Informationen
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.
