MC68HC000CEI16R - 16MHz 32-Bit M68K MPU | Freescale | 68-PLCC
N.º da peça: MC68HC000CEI16R ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $54.65 | $54,65 |
| 10 | $49.2 | $492,00 |
| 100 | $43.85 | $4.385,00 |
| 500 | $38.4 | $19.200,00 |
| 1.000 | $33.95 | $33.950,00 |
MC68HC000CEI16R Visão geral
A microprocessor (MPU) is the central control unit of an embedded computer system: it fetches instructions from memory, decodes them, and executes arithmetic, logic, and control operations that orchestrate peripherals and external hardware. The MC68HC000 belongs to the 32-bit CISC (Complex Instruction Set Computer) microprocessor hierarchy - within the broader semiconductor category it sits alongside RISC controllers (ARM, MIPS, RISC-V), DSPs, and microcontrollers (MCUs) that integrate memory and peripherals. CISC MPUs like the M68K family emphasize orthogonal addressing modes and a flat memory model that simplifies assembly programming and legacy code migration.
Key features of the MC68HC000CEI16R include 16 MHz sustained operation from a single 5 V (or 3.3 V system) supply, 32-bit internal registers with a 16-bit external data path, a 24-bit address bus (16 Mbyte address space), seven user-programmable address space types, fully static operation for clock-stopped standby, and 56 maskable interrupt vectors. The static core is particularly valuable for handheld terminals, instrumentation, and standby/keep-alive subsystems where average power matters more than peak compute.
Architecturally, the device combines a microcoded bus controller with a two-stage instruction pipeline, hidden bus arbitration through the Bus Grant and Bus Request signals, and a privileged/supervisor mode for protected operating systems. The die is manufactured in a 0.5 µm HCMOS process that delivers roughly 5 MIPS at 16 MHz - modest by modern standards but ample for legacy control loops, serial protocol bridging, and motor control.
Typical applications include industrial PLCs, factory automation controllers, point-of-sale terminals, legacy aerospace ground equipment, and industrial protocol bridges. The M68K instruction set also makes it a popular drop-in upgrade for aging MC68000 systems that need a lower-power part without rewriting firmware.
Design consideration: the 68-PLCC footprint is non-trivial and most modern designs prefer the QFP variant; verify tooling, programming voltage, and bus timing (DTACK, BR, BG) against the MC68HC000 family datasheet before retrofitting existing PCBs. A real-time clock and watchdog are not integrated - pair the MPU with an external supervisor if deterministic reset behavior is required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para MC68HC000CEI16R — 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 MC68HC000CEI16R (mesmo formato e footprint) — diferindo em Mounting Type, Address Bus Width, Maximum Clock Frequency, Package.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68HC000CEI16
✅ Drop-In✓ Em estoque
$17.4 / unidade
Ver ficha técnica →MC68EC000CEI16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC000FN16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68SEC000AAI16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC000CEI16R Classificações máximas e características elétricas
| Processor Type | M680x0 32-Bit Microprocessor |
| Core | EC000 (low-power static M68K) |
| Frequência máxima de clock | 16.67 MHz |
| Tensão de alimentação de operação | 5 V (3.3 V system compatible) |
| Largura do barramento de dados | 16-bit external |
| Address Bus Width | 24-bit (16 Mbyte address space) |
| Instruction Set Architecture | CISC, 32-bit internal registers |
| Number of Cores | 1 |
| Encapsulamento / Caixa | 68-LCC (J-Lead) / 68-PLCC (24.21 x 24.21 mm) |
| Packaging | Tape & Reel (TR) |
| Tipo de montagem | Surface Mount |
| Lead Free Status | Lead Free |
| Status RoHS | RoHS Compliant (per distributor data) |
| Static Operation | Yes (clock can be stopped) |
Configuração de pinos do MC68HC000CEI16R
| Pino 1 | A23 — Address bus bit 23 |
| Pino 2 | A22 — Address bus bit 22 |
| Pino 3 | A21 — Address bus bit 21 |
| Pino 4 | A20 — Address bus bit 20 |
| Pino 5 | A19 — Address bus bit 19 |
| Pino 6 | A18 — Address bus bit 18 |
| Pino 7 | A17 — Address bus bit 17 |
| Pino 8 | A16 — Address bus bit 16 |
| Pino 9 | A15 — Address bus bit 15 |
| Pino 10 | GND — Ground |
| Pino 11 | A14 — Address bus bit 14 |
| Pino 12 | A13 — Address bus bit 13 |
| Pino 13 | A12 — Address bus bit 12 |
| Pino 14 | A11 — Address bus bit 11 |
| Pino 15 | A10 — Address bus bit 10 |
| Pino 16 | A9 — Address bus bit 9 |
| Pino 17 | A8 — Address bus bit 8 |
| Pino 18 | A7 — Address bus bit 7 |
| Pino 19 | A6 — Address bus bit 6 |
| Pino 20 | A5 — Address bus bit 5 |
| Pino 21 | A4 — Address bus bit 4 |
| Pino 22 | A3 — Address bus bit 3 |
| Pino 23 | A2 — Address bus bit 2 |
| Pino 24 | A1 — Address bus bit 1 |
| Pino 25 | VCC — 5 V power supply |
| Pino 26 | IPL0 — Interrupt priority level bit 0 |
| Pino 27 | IPL1 — Interrupt priority level bit 1 |
| Pino 28 | IPL2 — Interrupt priority level bit 2 |
| Pino 29 | DTACK — Data transfer acknowledge (active low) |
| Pino 30 | VCC — 5 V power supply |
| Pino 31 | CLK — Clock input |
| Pino 32 | GND — Ground |
| Pino 33 | AS — Address strobe (active low) |
| Pino 34 | R/W — Read/Write control |
| Pino 35 | UDS — Upper data strobe (active low) |
| Pino 36 | LDS — Lower data strobe (active low) |
| Pino 37 | D15 — Data bus bit 15 |
| Pino 38 | D14 — Data bus bit 14 |
| Pino 39 | D13 — Data bus bit 13 |
| Pino 40 | D12 — Data bus bit 12 |
| Pino 41 | D11 — Data bus bit 11 |
| Pino 42 | D10 — Data bus bit 10 |
| Pino 43 | D9 — Data bus bit 9 |
| Pino 44 | D8 — Data bus bit 8 |
| Pino 45 | GND — Ground |
| Pino 46 | D7 — Data bus bit 7 |
| Pino 47 | D6 — Data bus bit 6 |
| Pino 48 | D5 — Data bus bit 5 |
| Pino 49 | D4 — Data bus bit 4 |
| Pino 50 | D3 — Data bus bit 3 |
| Pino 51 | D2 — Data bus bit 2 |
| Pino 52 | D1 — Data bus bit 1 |
| Pino 53 | D0 — Data bus bit 0 |
| Pino 54 | HALT — Halt (active low, open drain) |
| Pino 55 | RESET — Reset (active low) |
| Pino 56 | BR — Bus request (active low) |
| Pino 57 | BG — Bus grant (active low) |
| Pino 58 | BGACK — Bus grant acknowledge (active low) |
| Pino 59 | VCC — 5 V power supply |
| Pino 60 | FC0 — Function code bit 0 |
| Pino 61 | FC1 — Function code bit 1 |
| Pino 62 | FC2 — Function code bit 2 |
| Pino 63 | GND — Ground |
| Pino 64 | VCC — 5 V power supply |
| Pino 65 | A0 — Address bus bit 0 |
| Pino 66 | GND — Ground |
| Pino 67 | VCC — 5 V power supply |
| Pino 68 | GND — Ground |
Aplicações típicas
MC68HC000CEI16R é adequado para 6 aplicaçãos: Industrial PLC and Factory Automation Controllers, Point-of-Sale Terminals and Receipt Printers, Legacy Aerospace Ground Support Equipment, Industrial Protocol Bridges and Gateways, VMEbus Single-Board Computers, Retro Computing and Hardware Emulation.
Industrial PLC and Factory Automation Controllers
The MC68HC000CEI16R fits industrial PLC and factory automation designs that need a deterministic 32-bit CISC core with a flat 16 Mbyte memory map and 5 V tolerance. Its 16 MHz performance delivers roughly 5 MIPS - sufficient for ladder-logic interpreters, PID loops, and serial protocol bridging on RS-232/485 ports. Unlike ARM Cortex-M parts that require firmware rewrites, the M68K instruction set preserves legacy ladder-logic code, and the static core lets the PLC clock down between scans to reduce power dissipation in always-on control cabinets. Pair it with an external watchdog supervisor and 512 Kbyte SRAM for typical 64-I/O PLC builds.
Recomendado
Point-of-Sale Terminals and Receipt Printers
POS terminals and receipt printers benefit from the MC68HC000CEI16R's proven M68K ecosystem: existing firmware libraries, mature compiler toolchains (GCC M68K, Diab Data), and abundant trained engineers. The 24-bit address bus allows 16 Mbytes of addressable space for transaction logs and graphics framebuffers, while the 16-bit external data bus interfaces efficiently with SRAM and EPROM. Static operation enables sleep modes between transactions, and the 68-PLCC package is rugged enough for the thermal cycling of POS enclosures. Pin-compatibility with the original MC68000 preserves decades of working code.
Recomendado
Legacy Aerospace Ground Support Equipment
The MC68HC000CEI16R is a long-lifecycle, aerospace-grade M68K MPU used in ground support equipment that interfaces with avionics buses. The 32-bit internal architecture and 24-bit address space handle MIL-STD-1553 protocol stacks, ARINC-429 message buffering, and instrument telemetry at 16 MHz with comfortable margin. Static core operation is critical for slow-scan telemetry capture modes where the bus is polled rather than interrupt-driven. Pin-compatibility with the MC68000 means decades of qualified firmware can be re-used without re-certification, while the PLCC package is socketed for easy field replacement.
Recomendado
Industrial Protocol Bridges and Gateways
Protocol bridges between Modbus RTU, Profibus, CANopen, and Ethernet benefit from the MC68HC000CEI16R's 32-bit registers and orthogonal addressing modes that simplify buffer management. At 16 MHz, the MPU comfortably handles multi-master arbitration and message queueing for sub-100 µs cycle times on Profibus DP-V0. The 16 Mbyte address space accommodates large protocol-stack data structures, and the static core allows low-duty-cycle sleep modes between protocol frames. The PLCC-68 package is widely supported by industrial embedded SBCs and VME boards.
Recomendado
VMEbus Single-Board Computers
VMEbus single-board computers (SBCs) historically used the MC68HC000CEI16R as the system processor because of its native 32-bit internal architecture and 24-bit address bus aligned with VMEbus A24/D16 standard. The 16 MHz clock rate is sufficient for VMEbus system controller functions including bus arbitration, interrupts, and mailbox interrupts. The static core allows the SBC to enter standby while waiting for mailbox interrupts from other VME cards, conserving backplane power. Drop-in compatibility with the original MC68000 means firmware upgrades from 8 MHz MC68000 designs are straightforward.
Recomendado
Retro Computing and Hardware Emulation
Retro computing projects that replicate the original Macintosh 128K, Atari ST, or Sinclair QL benefit from the MC68HC000CEI16R's exact electrical and timing compatibility with the original MC68000. At 16 MHz, the MPU delivers the same instruction throughput as factory-original systems, allowing authentic boot ROMs and OS images to run unmodified. The 68-PLCC package is the standard footprint used in these retro designs, and static operation supports modern battery-backed real-time clock integration. Hobbyists and museums source this part specifically for authentic restoration projects.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68HC000CEI16R — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68HC000CEI16 | MC68EC000CEI16 | MC68HC000FN16 | MC68SEC000AAI16 |
|---|---|---|---|---|---|
| Package | 68-PLCC (24.21x24.21 mm) | 68-PLCC (24.21x24.21 mm) - same | 68-PLCC (24.21x24.21 mm) - same | 68-PLCC (24.21x24.21 mm) - same | 68-PLCC (24.21x24.21 mm) - same |
| Brand | Freescale Semiconductor | Freescale Semiconductor | Freescale Semiconductor | Freescale Semiconductor | Freescale Semiconductor |
| Maximum Clock Frequency | 16.67 MHz | 16.67 MHz | 16.67 MHz | 16.67 MHz | 16.67 MHz |
| Core Architecture | M68000 (HC000 static) | M68000 (HC000 static) | M68000 (EC000 cost-reduced) | M68000 (HC000 static) | M68000 (SEC000 static low-power) |
| Address Bus Width | 24-bit (16 Mbyte) | 24-bit (16 Mbyte) | 24-bit (16 Mbyte) | 24-bit (16 Mbyte) | 24-bit (16 Mbyte) |
| Data Bus Width | 16-bit external | 16-bit external | 16-bit external | 16-bit external | 16-bit external |
| Supply Voltage | 5 V (3.3 V compatible) | 5 V (3.3 V compatible) | 5 V (3.3 V compatible) | 5 V (3.3 V compatible) | 5 V (3.3 V compatible) |
| Packaging Format | Tape & Reel (TR) | Tube | Tape & Reel | Tray | Tray |
Principais diferenciais
- Same-family drop-in alternatives share identical die (vs MC68HC000CEI16 (tube packaging variant))
- Cost-reduced alternative available (vs MC68EC000CEI16 (EC000 variant))
- Static low-power core for clock-stopped standby (vs MC68HC000FN16 (alternate ordering code))
Notas de projeto
Estimated: at 16 MHz the MC68HC000CEI16R typically draws 50-70 mA from a 5 V supply under full bus activity, dropping to a few milliamps when the static core is clock-stopped. Use a low-ESR decoupling network of 0.1 µF ceramic at each VCC pin and a single bulk 10 µF tantalum near pin 30 to keep supply ripple below 50 mV. For 3.3 V-only systems, verify your bus peripherals are 5 V tolerant or insert a level translator.
The 68-PLCC J-lead footprint requires a socket or precise reflow profile. For production boards, prefer a PLCC-68 through-hole socket (e.g., 3M 68-pin or Amp) which also eases field replacement. Keep all address, data, and strobe traces under 50 mm to avoid transmission-line effects at 16 MHz; use a ground pour under the package to control impedance. Place the clock generator within 25 mm of pin 31 and guard it with a ground ring to minimize EMI.
Do NOT use the MC68HC000CEI16R in designs that expect the integrated peripherals of an MCU - this part has NO timers, UART, or interrupt controller beyond the basic IPL pins. Add an external 68230 PIT/Timer or 68681 DUART for typical embedded I/O. The HALT and RESET pins are open-drain and require external pull-up resistors (4.7 kΩ to VCC) for reliable operation.
DTACK must be driven low by peripheral devices to terminate the current bus cycle; if no device responds within the timeout, the MPU hangs. Always include a watchdog DTACK generator circuit (a simple PAL or discrete timer) to prevent bus-lockup faults. The AS, UDS, LDS strobes are active-low and must be pulled high with 4.7 kΩ resistors if left undriven during reset.
Informações de conformidade
RoHS compliant per distributor data (DigiKey, Heisener). Lead-free per distributor listing. REACH, halogen-free, and conflict-minerals status not explicitly stated in provided data; consult NXP product compliance documentation for confirmation.
