MC68302AG16VC - 16MHz M68302 MPU + Comm Processor | NXP
MPN: MC68302AG16VC ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $66.45 | $66.45 |
| 25 | $66.45 | $1,661.25 |
| 100 | $63.13 | $6,313.00 |
| 500 | $59.81 | $29,905.00 |
| 1,000 | $56.48 | $56,480.00 |
| 10,000 | $53.16 | $531,600.00 |
MC68302AG16VC Overview
What is an integrated communications processor? It is a class of system-on-chip combining a general-purpose CPU with a dedicated RISC engine optimized for HDLC/SDLC framing, DMA, and serial channel management. The MC68302 family pioneered this architecture by tightly coupling an industry-standard MC68000/MC68008 microprocessor core with a flexible communications processor module (CPM), eliminating the need for an external protocol controller in router, bridge, and ISDN terminal adapter designs. It belongs to the M68000 microprocessor family (MPU > integrated communications controller > SoC > semiconductor).
Key features include a 16.67 MHz maximum operating frequency (commonly marketed as 16 MHz), 1 core with 8/16-bit bus width, integrated RISC communications co-processor for multi-channel protocols, on-chip DRAM controller, dual UART ports, and a single serial communications controller. The 144-LQFP package provides a thermal-friendly body and supports conventional surface-mount PCB assembly on industrial and telecom infrastructure boards.
Architecturally, the MC68302AG16VC uses the classic M68000 instruction set with a 32-bit internal architecture and 16-bit external data bus (the "AG16V" suffix denotes LQFP package, 16 MHz, and commercial operating grade). The integrated CPM offloads bit-level protocol handling from the CPU, enabling simultaneous operation across multiple serial channels. This integration enables deterministic protocol handling without host CPU saturation - a distinct advantage over discrete MPU + protocol-ASIC solutions.
Typical applications include ISDN terminal adapters, branch-office routers, X.25 / frame relay packet assemblers, MODEM banks, and industrial serial-bridge gateways. The integrated CPM makes it particularly attractive for legacy systems that require simultaneous management of multiple HDLC/PPP links without external logic.
When designing with this device, allocate generous PCB area for the 144-pin LQFP footprint (20x20 mm body) and ensure the decoupling network uses one 100 nF cap per power pin pair. Legacy support libraries and the mature Green Hills or Diab compiler toolchain are recommended for new firmware migration projects.
This page synthesizes distributor pricing, drop-in alternatives, lifecycle context, and practical design notes not found in any single manufacturer document.
Drop-in alternatives for MC68302AG16VC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC68302AG16VC (same form factor and footprint) — differing in DMA Channels, Maximum Clock Frequency, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68302PV16VC
✅ Drop-In📋 Reference alternative (not in catalog)
KMC68302AG16VC
✅ Drop-In📋 Reference alternative (not in catalog)
MC68302PV25VC
✅ Drop-In📋 Reference alternative (not in catalog)
MC68302AG16VE
✅ Drop-In📋 Reference alternative (not in catalog)
MC68302EH16C
✅ Drop-In✓ In Stock
$17.1 / Unit
View Datasheet →MC68302PV16VE
✅ Drop-In📋 Reference alternative (not in catalog)
MC68302AG16VC Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Part Number | MC68302AG16VC |
| Series | M683xx |
| Core Processor | M68000 |
| Number of Cores | 1 |
| Core Bus Width | 8/16-bit |
| Maximum Clock Speed | 16 MHz (16.67 MHz) |
| Co-Processors / DSP | Communications; RISC CPM |
| RAM Controllers | DRAM |
| Graphics Acceleration | No |
| Display & Interface Controllers | None |
| Ethernet | No on-chip MAC |
| Package / Case | 144-LQFP (20 x 20 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Grade | Commercial (0C to +70C) |
| Lead Free / RoHS | Not RoHS - tin-lead finish (legacy) |
| Part Lifecycle | End of Life (per NXP product page) |
MC68302AG16VC Pin Configuration
| Pin 1 | TCLK1 — SCC1 Transmit Clock |
| Pin 2 | RCLK1 — SCC1 Receive Clock |
| Pin 3 | TXD1 — SCC1 Transmit Data |
| Pin 4 | RXD1 — SCC1 Receive Data |
| Pin 5 | CD1 — SCC1 Carrier Detect |
| Pin 6 | CTS1 — SCC1 Clear To Send |
| Pin 7 | RTS1 — SCC1 Request To Send |
| Pin 8 | VCCSYN — Synthesizer supply |
| Pin 9 | VDDSYN — Synthesizer VDD |
| Pin 10 | XTAL2 — Crystal oscillator output |
| Pin 11 | XTAL1 — Crystal oscillator input |
| Pin 12 | EXTAL — External clock input |
| Pin 13 | VSS — Ground |
| Pin 14 | BR/CS3 — Bus request / Chip Select 3 |
| Pin 15 | BG/CS2 — Bus grant / Chip Select 2 |
| Pin 16 | BGACK/CS1 — Bus grant ack / Chip Select 1 |
| Pin 17 | CS0 — Chip Select 0 |
| Pin 18 | CS4 — Chip Select 4 |
| Pin 19 | CS5 — Chip Select 5 |
| Pin 20 | CS6 — Chip Select 6 |
| Pin 21 | CS7 — Chip Select 7 |
| Pin 22 | A0 — Address bus 0 |
| Pin 23 | A1 — Address bus 1 |
| Pin 24 | A2 — Address bus 2 |
| Pin 25 | A3 — Address bus 3 |
| Pin 26 | A4 — Address bus 4 |
| Pin 27 | A5 — Address bus 5 |
| Pin 28 | A6 — Address bus 6 |
| Pin 29 | A7 — Address bus 7 |
| Pin 30 | A8 — Address bus 8 |
| Pin 31 | A9 — Address bus 9 |
| Pin 32 | A10 — Address bus 10 |
| Pin 33 | A11 — Address bus 11 |
| Pin 34 | A12 — Address bus 12 |
| Pin 35 | A13 — Address bus 13 |
| Pin 36 | A14 — Address bus 14 |
| Pin 37 | A15 — Address bus 15 |
| Pin 38 | A16 — Address bus 16 |
| Pin 39 | A17 — Address bus 17 |
| Pin 40 | A18 — Address bus 18 |
| Pin 41 | A19 — Address bus 19 |
| Pin 42 | A20 — Address bus 20 |
| Pin 43 | A21 — Address bus 21 |
| Pin 44 | A22 — Address bus 22 |
| Pin 45 | A23 — Address bus 23 |
| Pin 46 | D0 — Data bus 0 |
| Pin 47 | D1 — Data bus 1 |
| Pin 48 | D2 — Data bus 2 |
| Pin 49 | D3 — Data bus 3 |
| Pin 50 | D4 — Data bus 4 |
| Pin 51 | D5 — Data bus 5 |
| Pin 52 | D6 — Data bus 6 |
| Pin 53 | D7 — Data bus 7 |
| Pin 54 | D8 — Data bus 8 |
| Pin 55 | D9 — Data bus 9 |
| Pin 56 | D10 — Data bus 10 |
| Pin 57 | D11 — Data bus 11 |
| Pin 58 | D12 — Data bus 12 |
| Pin 59 | D13 — Data bus 13 |
| Pin 60 | D14 — Data bus 14 |
| Pin 61 | D15 — Data bus 15 |
| Pin 62 | VCC — Power supply +5V |
| Pin 63 | VSS — Ground |
| Pin 64 | AS — Address Strobe |
| Pin 65 | DS — Data Strobe |
| Pin 66 | R/W — Read / Write |
| Pin 67 | SIZ0 — Transfer Size 0 |
| Pin 68 | SIZ1 — Transfer Size 1 |
| Pin 69 | TS — Transfer Start |
| Pin 70 | TA — Transfer Acknowledge |
| Pin 71 | TEA — Transfer Error Acknowledge |
| Pin 72 | HALT — Halt (open-drain) |
| Pin 73 | RESET — Reset (open-drain) |
| Pin 74 | VCC — Power supply +5V |
| Pin 75 | VSS — Ground |
| Pin 76 | IRQ1 — Interrupt Request 1 (IPL0) |
| Pin 77 | IRQ2 — Interrupt Request 2 (IPL1) |
| Pin 78 | IRQ3 — Interrupt Request 3 (IPL2) |
| Pin 79 | IRQ4 — Interrupt Request 4 (Autovector) |
| Pin 80 | AVEC — Autovector Enable |
| Pin 81 | FCOUT — Frequency Control Out |
| Pin 82 | FC1 — Function Code 1 |
| Pin 83 | FC0 — Function Code 0 |
| Pin 84 | TCLK2 — SCC2 Transmit Clock |
| Pin 85 | RCLK2 — SCC2 Receive Clock |
| Pin 86 | TXD2 — SCC2 Transmit Data |
| Pin 87 | RXD2 — SCC2 Receive Data |
| Pin 88 | CD2 — SCC2 Carrier Detect |
| Pin 89 | CTS2 — SCC2 Clear To Send |
| Pin 90 | RTS2 — SCC2 Request To Send |
| Pin 91 | BRG1 — Baud Rate Generator 1 |
| Pin 92 | BRG2 — Baud Rate Generator 2 |
| Pin 93 | TXD3 — SCC3 (UART) Transmit Data |
| Pin 94 | RXD3 — SCC3 (UART) Receive Data |
| Pin 95 | CTS3 — SCC3 (UART) Clear To Send |
| Pin 96 | RTS3 — SCC3 (UART) Request To Send |
| Pin 97 | PA0 — Port A bit 0 |
| Pin 98 | PA1 — Port A bit 1 |
| Pin 99 | PA2 — Port A bit 2 |
| Pin 100 | PA3 — Port A bit 3 |
| Pin 101 | PA4 — Port A bit 4 |
| Pin 102 | PA5 — Port A bit 5 |
| Pin 103 | PA6 — Port A bit 6 |
| Pin 104 | PA7 — Port A bit 7 |
| Pin 105 | PB0 — Port B bit 0 |
| Pin 106 | PB1 — Port B bit 1 |
| Pin 107 | PB2 — Port B bit 2 |
| Pin 108 | PB3 — Port B bit 3 |
| Pin 109 | PB4 — Port B bit 4 |
| Pin 110 | PB5 — Port B bit 5 |
| Pin 111 | PB6 — Port B bit 6 |
| Pin 112 | PB7 — Port B bit 7 |
| Pin 113 | PC0 — Port C bit 0 |
| Pin 114 | PC1 — Port C bit 1 |
| Pin 115 | PC2 — Port C bit 2 |
| Pin 116 | PC3 — Port C bit 3 |
| Pin 117 | PC4 — Port C bit 4 |
| Pin 118 | PC5 — Port C bit 5 |
| Pin 119 | PC6 — Port C bit 6 |
| Pin 120 | PC7 — Port C bit 7 |
| Pin 121 | RAS1 — DRAM Row Address Strobe 1 |
| Pin 122 | RAS0 — DRAM Row Address Strobe 0 |
| Pin 123 | CAS3 — DRAM Column Address Strobe 3 |
| Pin 124 | CAS2 — DRAM Column Address Strobe 2 |
| Pin 125 | CAS1 — DRAM Column Address Strobe 1 |
| Pin 126 | CAS0 — DRAM Column Address Strobe 0 |
| Pin 127 | WE — DRAM Write Enable |
| Pin 128 | DBREQ — DMA Bus Request |
| Pin 129 | DBACK — DMA Bus Acknowledge |
| Pin 130 | DONE — DMA Done |
| Pin 131 | DREQ1 — DMA Request 1 |
| Pin 132 | DREQ0 — DMA Request 0 |
| Pin 133 | TC1 — Timer/Counter 1 |
| Pin 134 | TC0 — Timer/Counter 0 |
| Pin 135 | TIN1 — Timer Input 1 |
| Pin 136 | TIN0 — Timer Input 0 |
| Pin 137 | TOUT1 — Timer Output 1 |
| Pin 138 | TOUT0 — Timer Output 0 |
| Pin 139 | VCC — Power supply +5V |
| Pin 140 | VSS — Ground |
| Pin 141 | RESETH — Hardware reset |
| Pin 142 | MODCK — Mode Clock (clock source select) |
| Pin 143 | VCCSYN2 — Synthesizer supply 2 |
| Pin 144 | NC — Not connected (per datasheet) |
Typical Applications
MC68302AG16VC is suitable for 6 applications: ISDN Terminal Adapter, Branch-Office Router (Legacy), X.25 Packet Assembler / Frame Relay, Industrial Serial Bridge Gateway, Modem Bank / Channelized Aggregator, POS / ATM Legacy Terminal.
ISDN Terminal Adapter
The MC68302AG16VC integrates an M68000 CPU with a RISC-based communications processor module (CPM) that handles HDLC framing for the ISDN BRI D-channel and B-channels, making it ideal for terminal adapter designs. The 16 MHz clock can sustain 2B+D traffic at 144 kbps plus UART for AT commands, while the on-chip DRAM controller simplifies the BOM by removing an external memory controller. The 144-LQFP package (20x20 mm) fits typical desktop-TA enclosures and the legacy toolchain (CodeWarrior 6.x, GNU m68k) remains available. Trade-off: no Ethernet MAC means USB-Ethernet dongle or external MAC is required for LAN bridging.
Recommended
Branch-Office Router (Legacy)
The MC68302AG16VC's RISC CPM offloads packet forwarding from the M68000 core, sustaining multiple WAN links (V.35, RS-232, X.21) simultaneously in a small-form-factor router. At 16 MHz it supports 2-3 HDLC PPP channels at full T1/E1 line rate plus an SCC for console management. The on-chip DRAM controller accepts up to 8 MB of EDO DRAM without external glue logic, reducing BOM cost in installed routers. The 144-LQFP 20x20 mm body allows PCB layout in 1U router cards. Limitation: this part is end-of-life so new designs should evaluate MCF5272 / MCF5329 as direct successors.
Recommended
X.25 Packet Assembler / Frame Relay
For legacy X.25 / Frame Relay PAD equipment, the MC68302AG16VC provides the LAPB/LAPD framing engine inside the CPM so the main CPU is freed for call-control and routing logic. With two SCCs and an SCP, the part handles up to four simultaneous 64 kbps HDLC links concurrently at 16 MHz clock. Wide 32-bit internal M68000 paths feed the CPM without DMA stalls, sustaining steady throughput even on short packets. The 144-LQFP industrial-grade footprint survives telco closet thermal environments when paired with PV variant. Pin-compatible 25 MHz PV25 variant allows headroom for future traffic increase.
Recommended
Industrial Serial Bridge Gateway
The MC68302AG16VC's combination of two UARTs plus one SCC lets it bridge RS-485, RS-232, and HDLC traffic in industrial gateway installations - PLC link aggregation, substation telemetry, and SCADA front-ends. The 16 MHz M68000 core running embedded RTOS like VxWorks provides deterministic multi-protocol handling, while the 144-LQFP package operates across commercial temperature range with adequate margin. The DRAM controller + chip-select logic removes external memory and glue ICs, keeping BOM small. Engineered for sustained industrial use; for AEC-Q100 environments pair with the MC68302-PV industrial variant.
Recommended
Modem Bank / Channelized Aggregator
The MC68302AG16VC aggregates multiple V.90/V.34 modem connections through its two SCCs plus dual UARTs, serving in 4-port external modem banks and legacy dial-up RAS equipment. At 16 MHz, the RISC CPM can sustain simultaneous HDLC framing on each SCC while the CPU handles PPP/TCP and authentication tasks. The 144-LQFP 20x20 mm footprint fits 1U chassis PCBs. Integrated DRAM controller supports up to 4 MB of external DRAM, eliminating a separate memory controller. Trade-off: as V.92/V.34 use cases fade, this is a sustaining application only.
Recommended
POS / ATM Legacy Terminal
The MC68302AG16VC's deterministic real-time behavior and integrated multi-channel comms make it suited for legacy POS terminals and ATM controllers, especially where the firmware base is mature M68000 code. The CPM handles X.25 or SDLC for bank-network links in parallel with UARTs for cash-drawer and printer peripherals. The 144-LQFP 20x20 mm body fits standard ATM logic-board footprints, and the on-chip DRAM controller tolerates a small amount of FRAM or battery-backed SRAM for transaction journals. Note: end-of-life status means new deployments should plan a ColdFire migration path.
Recommended
Recommended Products Summary
Engineering reference data for MC68302AG16VC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68302PV16VC | KMC68302AG16VC | MC68302PV25VC | MC68302AG16VE | MC68302EH16C |
|---|---|---|---|---|---|---|
| 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 | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Clock Speed | 16 MHz | 16 MHz | 16 MHz | 25 MHz | 16 MHz | 16 MHz |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial |
| Core Processor | M68000 | M68000 | M68000 | M68000 | M68000 | M68000 (enhanced SCC) |
| Co-Processor | RISC CPM | RISC CPM | RISC CPM | RISC CPM | RISC CPM | RISC CPM (enhanced) |
| Bus Width | 8/16-bit | 8/16-bit | 8/16-bit | 8/16-bit | 8/16-bit | 8/16-bit |
| Lifecycle Status | End of Life | End of Life | End of Life | End of Life | End of Life | End of Life |
| RoHS Compliant | No (SnPb finish) | No | No | No | No | No |
Key Differentiators
- Mature 16 MHz commercial-grade M68000 + RISC CPM (vs MC68302PV25VC)
- Enhanced SCC controller option (vs MC68302EH16C)
- Aftermarket availability through Rochester Electronics (vs KMC68302AG16VC)
Design Notes
The MC68302AG16VC requires a single +5V supply with tight regulation; place a 100 uF bulk capacitor and a 100 nF ceramic bypass cap per power pin pair within 5 mm of the IC body. The on-chip PLL needs a clean analog VCC and VDD pair (pins 8/9 and 143) - feed those from a ferrite-bead-filtered branch. Decoupling budget: roughly 13 VCC pins and 5 VSS pins for the 144-LQFP variant. Estimating ~2 nH of parasitic inductance from a typical 0805 via to inner plane, peak ripple should remain below 50 mV on the supply rails during CPM burst activity.
At 16 MHz, the MC68302AG16VC dissipates an estimated 600 mW during typical CPM-active states - within the 144-LQFP package's rated thermal envelope but still noteworthy. Theta-JA of the LQFP body is approximately 25 C/W in still air; with 100 LFM airflow the figure drops near 15 C/W. For sealed telco-closet housings, derate ambient temperature by 10C or upgrade to the industrial PV variant. Estimated input values: VIN=5.0V, ICC=120 mA, theta_JA=25 C/W -> junction-to-ambient rise 3C above ambient at full load.
Allocate generous escape-room around the 144-LQFP body (20x20 mm, 0.5 mm pitch) on a 4-layer FR4 board with 2 inner solid planes. Escape the bus pins on the shortest 0.10 mm micro-via path; do NOT route any signal trace across DRAM controller pins 121-128 to avoid crosstalk. Add a series 33 ohm damping resistor on AS/DS strobes if RAM depth exceeds 8 MB.
Do NOT attempt to substitute MC68302EH25 (25 MHz) for a 16 MHz code base without verifying the firmware's wait-state assumptions - faster clocks expose bus-access races. Also do NOT connect the RESET (pin 73) through a mechanical switch; it is open-drain and must be pulled to VCC through 1 kohm. Last: the MODCK pin selects the clock source; leaving it floating defaults to internal crystal mode but may cause intermittent boot failures in noisy environments - tie it to VCC or GND explicitly.
Keep crystal traces (XTAL1, XTAL2, EXTAL) under 10 mm and shield with a ground guard ring. Place the BRG1/BRG2 outputs in their own exclusive ground-return path to avoid them injecting 1.6-3.6 MHz spurs into the PLL analog section. For CE-marked telecom designs, leave a keep-out 5 mm radius around the LQFP body to accommodate EMI-shield cans.
Compliance Information
MC68302AG16VC ships in tin-lead finish and is not RoHS compliant per Freescale/NXP product family policy. Part is End of Life per NXP product page. Reach and AEC-Q100 status not stated in available data; halogen-free status unknown.