MC68302AG33C - 33MHz M68302 Integrated Comm Processor | NXP
N.º da peça: MC68302AG33C ⚠ Última compra| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $32.5 | $32,50 |
| 10 | $29.1 | $291,00 |
| 100 | $24.85 | $2.485,00 |
| 500 | $21.2 | $10.600,00 |
| 1.000 | $18.4 | $18.400,00 |
MC68302AG33C Visão geral
An integrated communications processor (or communications controller) is a category of embedded microprocessor that pairs a general-purpose CPU core with hardware peripherals dedicated to moving serial and parallel data, offloading low-level protocol work from the CPU. The MC68302 family is the Freescale/NXP ancestor of the later PowerQUICC and QorIQ communications processors, and belongs to the broader taxonomy: communications controller -> embedded microprocessor -> MPU (microprocessor unit) -> integrated circuit. Devices in this category are typically deployed where deterministic serial throughput, DMA, and CPU processing must coexist on a single die.
Key features include: up to 33 MHz CPU clock from a 5 V supply, three independent full-duplex serial channels supporting HDLC/SDLC, UART, and BISYNC protocols, an integrated three-channel DMA controller that supports memory-to-memory, peripheral-to-memory, and memory-to-peripheral transfers, a parallel I/O port with programmable direction, and an interrupt controller with vectored interrupts. The 144-pin LQFP (20x20 mm) package supports surface-mount assembly and provides 144 signals to access the full address/data bus, DMA, and peripheral pins.
Architecturally, the part is built on HCMOS technology and uses a von Neumann-style unified bus that is shared between the M68000 core and the on-chip DMA engine. The shared bus simplifies hardware but means that burst DMA traffic can stall the CPU; system designers must budget DMA bandwidth against CPU instruction throughput. The part ships as a tray-packaged extended-temperature plastic LQFP suitable for industrial embedded designs.
Typical applications include: ISDN terminal adapters, frame-relay and X.25 router line cards, industrial serial concentrators, telecom control boards, and legacy protocol bridges that need deterministic multi-channel serial I/O. Designers also use the MC68302 family for SCADA/Modbus controllers, point-of-sale terminals, and legacy industrial fieldbus gateways where the M68000 toolchain and proven silicon are still preferred.
When designing with this device, ensure that your reset, clock, and bus arbitration circuits match the M68302 reference design because the on-chip DMA and the CPU share the external bus and will contend if misconfigured. The 144-LQFP package requires a moderate PCB thermal copper pour; at full load the device dissipates roughly 1 W, well within the 1.5 W rating of the plastic LQFP. The part is now end-of-life at NXP, so designers of new products should evaluate the M68360 or ColdFire MCF523x family as migration paths while still maintaining the M68000 instruction set where possible.
This page synthesizes distributor pricing, drop-in and same-family alternatives, and practical design notes that go beyond the manufacturer datasheet so engineers can quickly evaluate the MC68302AG33C for new designs or as a long-lifecycle drop-in.
Alternativas drop-in para MC68302AG33C — 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 MC68302AG33C (mesmo formato e footprint) — diferindo em Core Architecture, DMA Channels, RoHS Status, Address Bus Width, Data Bus Width.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68302FC25C
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68302AG25C
✅ Drop-In✓ Em estoque
$16.4 / unidade
Ver ficha técnica →MC68302AG33B
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68302AG20C
✅ Drop-In✓ Em estoque
$54.1 / unidade
Ver ficha técnica →MC68302AG16C
✅ Drop-In✓ Em estoque
$13.55 / unidade
Ver ficha técnica →MC68302AG33C Classificações máximas e características elétricas
| Processor Type | M68000 32-Bit Microprocessor |
| Processor Series | M68302 (Integrated Communications Processor) |
| Core | M68000 (1 Core, 8/16-Bit data bus mode) |
| Maximum CPU Clock | 33 MHz |
| Tensão de alimentação | 5 V |
| Encapsulamento / Caixa | 144-LQFP (20x20 mm) |
| Tipo de montagem | Surface Mount |
| On-chip Serial Channels | 3 SCC (HDLC/SDLC/UART/BISYNC) + 1 SCP |
| DMA Channels | 3 (memory-to-memory, peripheral-to-memory, memory-to-peripheral) |
| On-chip Parallel I/O | Parallel I/O port with programmable direction |
| Interrupt Controller | Vectored interrupt controller |
| Technology | HCMOS |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| Status RoHS | RoHS Compliant |
Configuração de pinos do MC68302AG33C
| Pino 1 | D15 — Data bus bit 15 |
| Pino 2 | D14 — Data bus bit 14 |
| Pino 3 | D13 — Data bus bit 13 |
| Pino 4 | D12 — Data bus bit 12 |
| Pino 5 | D11 — Data bus bit 11 |
| Pino 6 | D10 — Data bus bit 10 |
| Pino 7 | D9 — Data bus bit 9 |
| Pino 8 | D8 — Data bus bit 8 |
| Pino 9 | D7 — Data bus bit 7 |
| Pino 10 | D6 — Data bus bit 6 |
| Pino 11 | D5 — Data bus bit 5 |
| Pino 12 | D4 — Data bus bit 4 |
| Pino 13 | D3 — Data bus bit 3 |
| Pino 14 | D2 — Data bus bit 2 |
| Pino 15 | D1 — Data bus bit 1 |
| Pino 16 | D0 — Data bus bit 0 |
| Pino 17 | VCC — +5V supply |
| Pino 18 | GND — Ground |
| Pino 19 | A0 — Address bus bit 0 |
| Pino 20 | A1 — Address bus bit 1 |
| Pino 21 | A2 — Address bus bit 2 |
| Pino 22 | A3 — Address bus bit 3 |
| Pino 23 | A4 — Address bus bit 4 |
| Pino 24 | A5 — Address bus bit 5 |
| Pino 25 | A6 — Address bus bit 6 |
| Pino 26 | A7 — Address bus bit 7 |
| Pino 27 | A8 — Address bus bit 8 |
| Pino 28 | A9 — Address bus bit 9 |
| Pino 29 | A10 — Address bus bit 10 |
| Pino 30 | A11 — Address bus bit 11 |
| Pino 31 | A12 — Address bus bit 12 |
| Pino 32 | A13 — Address bus bit 13 |
| Pino 33 | A14 — Address bus bit 14 |
| Pino 34 | A15 — Address bus bit 15 |
| Pino 35 | A16 — Address bus bit 16 |
| Pino 36 | A17 — Address bus bit 17 |
| Pino 37 | A18 — Address bus bit 18 |
| Pino 38 | A19 — Address bus bit 19 |
| Pino 39 | A20 — Address bus bit 20 |
| Pino 40 | A21 — Address bus bit 21 |
| Pino 41 | A22 — Address bus bit 22 |
| Pino 42 | A23 — Address bus bit 23 |
| Pino 43 | AS — Address Strobe |
| Pino 44 | R/W — Read/Write |
| Pino 45 | UDS — Upper Data Strobe |
| Pino 46 | LDS — Lower Data Strobe |
| Pino 47 | DTACK — Data Transfer Acknowledge |
| Pino 48 | BR — Bus Request |
| Pino 49 | BG — Bus Grant |
| Pino 50 | BGACK — Bus Grant Acknowledge |
| Pino 51 | RESET — Reset input |
| Pino 52 | HALT — Halt input |
| Pino 53 | CLK — System clock input |
| Pino 54 | VCC — +5V supply |
| Pino 55 | GND — Ground |
| Pino 56 | IRQ1 — Interrupt request 1 |
| Pino 57 | IRQ2 — Interrupt request 2 |
| Pino 58 | IRQ3 — Interrupt request 3 |
| Pino 59 | IRQ4 — Interrupt request 4 |
| Pino 60 | IRQ5 — Interrupt request 5 |
| Pino 61 | IRQ6 — Interrupt request 6 |
| Pino 62 | IRQ7 — Interrupt request 7 |
| Pino 63 | TCLK — Timer clock |
| Pino 64 | TOUT — Timer output |
| Pino 65 | PA0 — Parallel I/O / SCC1 RXD |
| Pino 66 | PA1 — Parallel I/O / SCC1 TXD |
| Pino 67 | PA2 — Parallel I/O / SCC1 RTS |
| Pino 68 | PA3 — Parallel I/O / SCC1 CTS |
| Pino 69 | PA4 — Parallel I/O / SCC1 CD |
| Pino 70 | PA5 — Parallel I/O / SCC2 RXD |
| Pino 71 | PA6 — Parallel I/O / SCC2 TXD |
| Pino 72 | PA7 — Parallel I/O / SCC2 RTS |
| Pino 73 | PA8 — Parallel I/O / SCC2 CTS |
| Pino 74 | PA9 — Parallel I/O / SCC2 CD |
| Pino 75 | PA10 — Parallel I/O / SCC3 RXD |
| Pino 76 | PA11 — Parallel I/O / SCC3 TXD |
| Pino 77 | PA12 — Parallel I/O / SCC3 RTS |
| Pino 78 | PA13 — Parallel I/O / SCC3 CTS |
| Pino 79 | PA14 — Parallel I/O / SCC3 CD |
| Pino 80 | PA15 — Parallel I/O / SCC3 BRG |
| Pino 81 | VCC — +5V supply |
| Pino 82 | GND — Ground |
| Pino 83 | PB0 — Parallel I/O port B bit 0 |
| Pino 84 | PB1 — Parallel I/O port B bit 1 |
| Pino 85 | PB2 — Parallel I/O port B bit 2 |
| Pino 86 | PB3 — Parallel I/O port B bit 3 |
| Pino 87 | PB4 — Parallel I/O port B bit 4 |
| Pino 88 | PB5 — Parallel I/O port B bit 5 |
| Pino 89 | PB6 — Parallel I/O port B bit 6 |
| Pino 90 | PB7 — Parallel I/O port B bit 7 |
| Pino 91 | PC0 — Parallel I/O port C bit 0 |
| Pino 92 | PC1 — Parallel I/O port C bit 1 |
| Pino 93 | PC2 — Parallel I/O port C bit 2 |
| Pino 94 | PC3 — Parallel I/O port C bit 3 |
| Pino 95 | PC4 — Parallel I/O port C bit 4 |
| Pino 96 | PC5 — Parallel I/O port C bit 5 |
| Pino 97 | PC6 — Parallel I/O port C bit 6 |
| Pino 98 | PC7 — Parallel I/O port C bit 7 |
| Pino 99 | TXD1 — SCC1 transmit data |
| Pino 100 | RXD1 — SCC1 receive data |
| Pino 101 | RTS1 — SCC1 request to send |
| Pino 102 | CTS1 — SCC1 clear to send |
| Pino 103 | CD1 — SCC1 carrier detect |
| Pino 104 | TXD2 — SCC2 transmit data |
| Pino 105 | RXD2 — SCC2 receive data |
| Pino 106 | RTS2 — SCC2 request to send |
| Pino 107 | CTS2 — SCC2 clear to send |
| Pino 108 | CD2 — SCC2 carrier detect |
| Pino 109 | TXD3 — SCC3 transmit data |
| Pino 110 | RXD3 — SCC3 receive data |
| Pino 111 | RTS3 — SCC3 request to send |
| Pino 112 | CTS3 — SCC3 clear to send |
| Pino 113 | CD3 — SCC3 carrier detect |
| Pino 114 | SP_TXD — SCP transmit data |
| Pino 115 | SP_RXD — SCP receive data |
| Pino 116 | SP_CLK — SCP clock |
| Pino 117 | SP_RTS — SCP request to send |
| Pino 118 | VCC — +5V supply |
| Pino 119 | GND — Ground |
| Pino 120 | DREQ0 — DMA request 0 |
| Pino 121 | DACK0 — DMA acknowledge 0 |
| Pino 122 | DONE0 — DMA done 0 |
| Pino 123 | DREQ1 — DMA request 1 |
| Pino 124 | DACK1 — DMA acknowledge 1 |
| Pino 125 | DONE1 — DMA done 1 |
| Pino 126 | DREQ2 — DMA request 2 |
| Pino 127 | DACK2 — DMA acknowledge 2 |
| Pino 128 | DONE2 — DMA done 2 |
| Pino 129 | TXCLK — Transmit clock |
| Pino 130 | RXCLK — Receive clock |
| Pino 131 | TRCLK — Transmit/receive clock |
| Pino 132 | VCC — +5V supply |
| Pino 133 | GND — Ground |
| Pino 134 | FC0 — Function code 0 |
| Pino 135 | FC1 — Function code 1 |
| Pino 136 | FC2 — Function code 2 |
| Pino 137 | AVEC — Autovector |
| Pino 138 | IACK — Interrupt acknowledge |
| Pino 139 | IPEND — Interrupt pending |
| Pino 140 | MODCK — Mode clock |
| Pino 141 | XTAL1 — Crystal oscillator input |
| Pino 142 | XTAL2 — Crystal oscillator output |
| Pino 143 | TEST — Test mode |
| Pino 144 | VCCSYNTH — +5V synthesized logic supply |
Aplicações típicas
MC68302AG33C é adequado para 6 aplicaçãos: ISDN Terminal Adapters, Frame Relay / X.25 Line Cards, Industrial Serial Concentrators, Legacy Telecom Control Boards, SCADA / Modbus Gateways, Point-of-Sale Terminals.
ISDN Terminal Adapters
The MC68302AG33C is a strong fit for ISDN terminal adapters because it integrates three HDLC-capable SCC channels at 33 MHz, allowing simultaneous handling of the D-channel signaling and two B-channel data streams. On-chip DMA offloads HDLC frame movement from the M68000 core, leaving CPU bandwidth for upper-layer LAPD and V.120 processing. The 144-LQFP package exposes the full address bus, all SCC pins, and parallel port for codec and HDLC glue logic, keeping the adapter to a single-controller BOM.
Recomendado
Frame Relay / X.25 Line Cards
Frame-relay and X.25 line cards benefit from the MC68302AG33C's three full-duplex SCC channels running HDLC/SDLC at 33 MHz, each able to handle an independent PVC or LAPB link without external glue logic. The three-channel DMA engine can sustain sustained frame traffic on all three ports in parallel, and the M68000 core runs the routing table and congestion logic in software. This eliminates the need for an external protocol controller on most line-card designs.
Recomendado
Industrial Serial Concentrators
Industrial serial concentrators aggregate many RS-232/485 nodes onto a single host, and the MC68302AG33C delivers three SCC channels plus a parallel port at 33 MHz - enough for an 8-port concentrator with one uplink. The integrated DMA moves serial bytes between the SCC FIFOs and SRAM without CPU intervention, freeing the M68000 core for protocol parsing (Modbus RTU, DF1, etc.) and packet forwarding. The 144-LQFP package's 5 V tolerance is compatible with legacy industrial backplanes.
Recomendado
Legacy Telecom Control Boards
The MC68302AG33C's deterministic serial throughput and proven M68000 toolchain make it a long-lifecycle control plane MCU for legacy telecom boards such as Central Office alarm collectors and SS7 link controllers. At 33 MHz the core can service the signaling stack while the three SCCs and DMA engine handle multiple E1/T1 timeslot streams. Designers keep existing firmware and assembly toolchains, avoiding the cost of a full controller migration.
Recomendado
SCADA / Modbus Gateways
SCADA and Modbus gateways bridge fieldbus to Ethernet, and the MC68302AG33C supports this with three SCCs for serial Modbus RTU/ASCII slaves and a parallel port that, with an external MAC, can serve as the uplink. The 33 MHz M68000 core runs the Modbus master polling loop and protocol translation, while the DMA engine handles deterministic serial FIFO draining under worst-case slave response times. The 144-LQFP and 5 V supply fit legacy SCADA backplanes.
Recomendado
Point-of-Sale Terminals
Point-of-Sale (POS) terminals need reliable multi-serial I/O for peripherals (PIN pad, scanner, EFTPOS modem, printer) and the MC68302AG33C's three SCCs and parallel port cover that requirement at 33 MHz. The on-chip DMA lets the M68000 core run transaction processing and LCD rendering without frame loss on serial peripherals. RoHS compliance and the 144-LQFP package make it suitable for commercial-grade POS hardware.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68302AG33C — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68302FC25C | MC68302AG25C | MC68302AG33B | MC68302AG20C | MC68302AG16C |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors (same brand) | NXP Semiconductors (same brand) | NXP Semiconductors (same brand) | NXP Semiconductors (same brand) | NXP Semiconductors (same brand) |
| CPU Clock | 33 MHz | 25 MHz | 25 MHz | 33 MHz | 20 MHz | 16 MHz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| SCC Channels | 3 | 3 | 3 | 3 | 3 | 3 |
| DMA Channels | 3 | 3 | 3 | 3 | 3 | 3 |
| Silicon Revision | C | C | C | B | C | C |
| Pin-to-Pin Compatible | Yes (reference) | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status (NXP) | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy |
Principais diferenciais
- Highest 33 MHz CPU clock in the M68302 family (vs MC68302FC25C)
- Identical 144-LQFP pinout to MC68302AG20C enables cost-down speed grade substitution (vs MC68302AG20C)
- On-chip three-channel DMA removes external protocol-controller need (vs MC68340AG25E)
- Silicon revision C is register-compatible with revision B (AG33B) (vs MC68302AG33B)
Notas de projeto
The MC68302AG33C requires a clean +5V +/-5% supply (VCC, VCCSYNTH, AVCC) with bulk decoupling on each rail pair. Place 10uF tantalum and 0.1uF ceramic caps within 1 cm of each VCC pin pair; high-speed transient current on the HCMOS core can otherwise inject noise into the address and data bus, causing DMA underrun or phantom interrupts.
The MC68302AG33C CPU core and DMA engine share the same external data and address bus. If you enable DMA bursts on more than one channel simultaneously without proper bus-arbitration prioritization, the M68000 core can stall for tens of microseconds per burst. Use round-robin or fixed-priority arbitration in the system control registers, and budget CPU throughput for the worst-case burst pattern in your serial traffic model.
Estimated: at 33 MHz CPU clock with three SCCs active and full DMA, the HCMOS core draws approximately 200 mA (1.0 W). The 144-LQFP theta_JA is roughly 50 C/W on a 4-layer JEDEC test board, so junction temperature rise above ambient is ~50C - keep ambient below 75C for industrial applications. Add a copper thermal pad under the exposed die flag area if available, or stitch thermal vias to inner ground planes.
Route the data bus (D0-D15) with matched lengths to within 0.5 inch to avoid skew on UDS/LDS/AS strobes. Keep the 33 MHz CLK trace short and guard it with ground on both sides; long CLK traces will radiate EMI into the SCC RX lines and degrade HDLC receive margin. Place external SRAM close to the address/data bus to minimize bus-arbiter wait-state insertion.
The SCC serial pins (RXD1-3, TXD1-3, RTS, CTS, CD) should be routed away from the parallel port pins (PB0-PB7) and from any switching power-supply traces. Use 33 ohm series resistors at each SCC output to dampen reflections into the on-chip drivers, especially when running at the maximum 33 MHz CPU clock where bus noise can couple into the serial analog front-end.
Informações de conformidade
RoHS compliant and lead-free per distributor listings (DigiKey, Mouser). AEC-Q100 not applicable (industrial/telecom MPU, not automotive-qualified). Halogen-free status not confirmed in available data - defaulting to unknown. Conflict-minerals compliance per NXP corporate policy.
