MC68302AG33C - 33MHz M68302 Integrated Comm Processor | NXP
Référence : MC68302AG33C ⚠ Dernier achat| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour MC68302AG33C — 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 MC68302AG33C (même facteur de forme et même empreinte) — différant par Core Architecture, DMA Channels, RoHS Status, Address Bus Width, Data Bus Width.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68302FC25C
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68302AG25C
✅ Remplacement direct✓ En stock
$16.4 / unité
Voir la fiche technique →MC68302AG33B
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68302AG20C
✅ Remplacement direct✓ En stock
$54.1 / unité
Voir la fiche technique →MC68302AG16C
✅ Remplacement direct✓ En stock
$13.55 / unité
Voir la fiche technique →MC68302AG33C Valeurs maximales et caractéristiques électriques
| 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 |
| Tension d'alimentation | 5 V |
| Boîtier / Format | 144-LQFP (20x20 mm) |
| Type de montage | 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 |
| Statut RoHS | RoHS Compliant |
Configuration des broches de MC68302AG33C
| Broche 1 | D15 — Data bus bit 15 |
| Broche 2 | D14 — Data bus bit 14 |
| Broche 3 | D13 — Data bus bit 13 |
| Broche 4 | D12 — Data bus bit 12 |
| Broche 5 | D11 — Data bus bit 11 |
| Broche 6 | D10 — Data bus bit 10 |
| Broche 7 | D9 — Data bus bit 9 |
| Broche 8 | D8 — Data bus bit 8 |
| Broche 9 | D7 — Data bus bit 7 |
| Broche 10 | D6 — Data bus bit 6 |
| Broche 11 | D5 — Data bus bit 5 |
| Broche 12 | D4 — Data bus bit 4 |
| Broche 13 | D3 — Data bus bit 3 |
| Broche 14 | D2 — Data bus bit 2 |
| Broche 15 | D1 — Data bus bit 1 |
| Broche 16 | D0 — Data bus bit 0 |
| Broche 17 | VCC — +5V supply |
| Broche 18 | GND — Ground |
| Broche 19 | A0 — Address bus bit 0 |
| Broche 20 | A1 — Address bus bit 1 |
| Broche 21 | A2 — Address bus bit 2 |
| Broche 22 | A3 — Address bus bit 3 |
| Broche 23 | A4 — Address bus bit 4 |
| Broche 24 | A5 — Address bus bit 5 |
| Broche 25 | A6 — Address bus bit 6 |
| Broche 26 | A7 — Address bus bit 7 |
| Broche 27 | A8 — Address bus bit 8 |
| Broche 28 | A9 — Address bus bit 9 |
| Broche 29 | A10 — Address bus bit 10 |
| Broche 30 | A11 — Address bus bit 11 |
| Broche 31 | A12 — Address bus bit 12 |
| Broche 32 | A13 — Address bus bit 13 |
| Broche 33 | A14 — Address bus bit 14 |
| Broche 34 | A15 — Address bus bit 15 |
| Broche 35 | A16 — Address bus bit 16 |
| Broche 36 | A17 — Address bus bit 17 |
| Broche 37 | A18 — Address bus bit 18 |
| Broche 38 | A19 — Address bus bit 19 |
| Broche 39 | A20 — Address bus bit 20 |
| Broche 40 | A21 — Address bus bit 21 |
| Broche 41 | A22 — Address bus bit 22 |
| Broche 42 | A23 — Address bus bit 23 |
| Broche 43 | AS — Address Strobe |
| Broche 44 | R/W — Read/Write |
| Broche 45 | UDS — Upper Data Strobe |
| Broche 46 | LDS — Lower Data Strobe |
| Broche 47 | DTACK — Data Transfer Acknowledge |
| Broche 48 | BR — Bus Request |
| Broche 49 | BG — Bus Grant |
| Broche 50 | BGACK — Bus Grant Acknowledge |
| Broche 51 | RESET — Reset input |
| Broche 52 | HALT — Halt input |
| Broche 53 | CLK — System clock input |
| Broche 54 | VCC — +5V supply |
| Broche 55 | GND — Ground |
| Broche 56 | IRQ1 — Interrupt request 1 |
| Broche 57 | IRQ2 — Interrupt request 2 |
| Broche 58 | IRQ3 — Interrupt request 3 |
| Broche 59 | IRQ4 — Interrupt request 4 |
| Broche 60 | IRQ5 — Interrupt request 5 |
| Broche 61 | IRQ6 — Interrupt request 6 |
| Broche 62 | IRQ7 — Interrupt request 7 |
| Broche 63 | TCLK — Timer clock |
| Broche 64 | TOUT — Timer output |
| Broche 65 | PA0 — Parallel I/O / SCC1 RXD |
| Broche 66 | PA1 — Parallel I/O / SCC1 TXD |
| Broche 67 | PA2 — Parallel I/O / SCC1 RTS |
| Broche 68 | PA3 — Parallel I/O / SCC1 CTS |
| Broche 69 | PA4 — Parallel I/O / SCC1 CD |
| Broche 70 | PA5 — Parallel I/O / SCC2 RXD |
| Broche 71 | PA6 — Parallel I/O / SCC2 TXD |
| Broche 72 | PA7 — Parallel I/O / SCC2 RTS |
| Broche 73 | PA8 — Parallel I/O / SCC2 CTS |
| Broche 74 | PA9 — Parallel I/O / SCC2 CD |
| Broche 75 | PA10 — Parallel I/O / SCC3 RXD |
| Broche 76 | PA11 — Parallel I/O / SCC3 TXD |
| Broche 77 | PA12 — Parallel I/O / SCC3 RTS |
| Broche 78 | PA13 — Parallel I/O / SCC3 CTS |
| Broche 79 | PA14 — Parallel I/O / SCC3 CD |
| Broche 80 | PA15 — Parallel I/O / SCC3 BRG |
| Broche 81 | VCC — +5V supply |
| Broche 82 | GND — Ground |
| Broche 83 | PB0 — Parallel I/O port B bit 0 |
| Broche 84 | PB1 — Parallel I/O port B bit 1 |
| Broche 85 | PB2 — Parallel I/O port B bit 2 |
| Broche 86 | PB3 — Parallel I/O port B bit 3 |
| Broche 87 | PB4 — Parallel I/O port B bit 4 |
| Broche 88 | PB5 — Parallel I/O port B bit 5 |
| Broche 89 | PB6 — Parallel I/O port B bit 6 |
| Broche 90 | PB7 — Parallel I/O port B bit 7 |
| Broche 91 | PC0 — Parallel I/O port C bit 0 |
| Broche 92 | PC1 — Parallel I/O port C bit 1 |
| Broche 93 | PC2 — Parallel I/O port C bit 2 |
| Broche 94 | PC3 — Parallel I/O port C bit 3 |
| Broche 95 | PC4 — Parallel I/O port C bit 4 |
| Broche 96 | PC5 — Parallel I/O port C bit 5 |
| Broche 97 | PC6 — Parallel I/O port C bit 6 |
| Broche 98 | PC7 — Parallel I/O port C bit 7 |
| Broche 99 | TXD1 — SCC1 transmit data |
| Broche 100 | RXD1 — SCC1 receive data |
| Broche 101 | RTS1 — SCC1 request to send |
| Broche 102 | CTS1 — SCC1 clear to send |
| Broche 103 | CD1 — SCC1 carrier detect |
| Broche 104 | TXD2 — SCC2 transmit data |
| Broche 105 | RXD2 — SCC2 receive data |
| Broche 106 | RTS2 — SCC2 request to send |
| Broche 107 | CTS2 — SCC2 clear to send |
| Broche 108 | CD2 — SCC2 carrier detect |
| Broche 109 | TXD3 — SCC3 transmit data |
| Broche 110 | RXD3 — SCC3 receive data |
| Broche 111 | RTS3 — SCC3 request to send |
| Broche 112 | CTS3 — SCC3 clear to send |
| Broche 113 | CD3 — SCC3 carrier detect |
| Broche 114 | SP_TXD — SCP transmit data |
| Broche 115 | SP_RXD — SCP receive data |
| Broche 116 | SP_CLK — SCP clock |
| Broche 117 | SP_RTS — SCP request to send |
| Broche 118 | VCC — +5V supply |
| Broche 119 | GND — Ground |
| Broche 120 | DREQ0 — DMA request 0 |
| Broche 121 | DACK0 — DMA acknowledge 0 |
| Broche 122 | DONE0 — DMA done 0 |
| Broche 123 | DREQ1 — DMA request 1 |
| Broche 124 | DACK1 — DMA acknowledge 1 |
| Broche 125 | DONE1 — DMA done 1 |
| Broche 126 | DREQ2 — DMA request 2 |
| Broche 127 | DACK2 — DMA acknowledge 2 |
| Broche 128 | DONE2 — DMA done 2 |
| Broche 129 | TXCLK — Transmit clock |
| Broche 130 | RXCLK — Receive clock |
| Broche 131 | TRCLK — Transmit/receive clock |
| Broche 132 | VCC — +5V supply |
| Broche 133 | GND — Ground |
| Broche 134 | FC0 — Function code 0 |
| Broche 135 | FC1 — Function code 1 |
| Broche 136 | FC2 — Function code 2 |
| Broche 137 | AVEC — Autovector |
| Broche 138 | IACK — Interrupt acknowledge |
| Broche 139 | IPEND — Interrupt pending |
| Broche 140 | MODCK — Mode clock |
| Broche 141 | XTAL1 — Crystal oscillator input |
| Broche 142 | XTAL2 — Crystal oscillator output |
| Broche 143 | TEST — Test mode |
| Broche 144 | VCCSYNTH — +5V synthesized logic supply |
Applications typiques
MC68302AG33C convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68302AG33C — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
