MC68302EH20C - 20MHz M683xx 8/16-Bit MPU | NXP | 132-PQFP
Артикул: MC68302EH20C ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $38.5 | $38,50 |
| 10 | $32.4 | $324,00 |
| 100 | $26.75 | $2.675,00 |
| 500 | $22.1 | $11.050,00 |
| 1.000 | $19.85 | $19.850,00 |
MC68302EH20C Обзор
What is an M683xx microprocessor? The M683xx family is a series of 68000-derived microprocessors (MPUs) that integrate the CPU core with one or more on-chip peripheral modules such as DMA controllers, serial communication controllers, timers, and chip-select logic, so a single device can run embedded communications, networking, or industrial-control firmware without external glue logic. Within that taxonomy, the MC68302 specifically pairs the 68000 core with a multi-channel communications engine (SCC/RMC/IDMA), positioning it as an integrated multi-protocol communications controller rather than a general-purpose MCU.
Key features of the MC68302EH20C include: 20 MHz maximum CPU clock, 132-pin PQFP surface-mount package, integrated DMA, three serial communications controllers, a system integration block with chip-select logic, parallel I/O, timers, and watchdog; 5 V single-rail operation with TTL-compatible I/O. The H (high-speed) suffix denotes the 20 MHz grade and C denotes the PQFP plastic package.
Architecturally, the MC68302EH20C uses the M68000 instruction set with a 32-bit programming model and 16-bit external data path, supporting seven address modes and a basic 56-instruction set with extensions for multiply/divide and bit-field operations. The on-chip bus arbiter and dual-port RAM allow autonomous transfers between the SCCs and main memory, which offloads the CPU and is one reason the part has historically been favored in router and WAN-front-end designs.
Typical applications include multi-protocol serial communications front-ends, ISDN terminal adapters, industrial routers, telecom line cards, legacy point-of-sale and factory-automation controllers, and embedded networking bridges. The integrated peripherals let a single MC68302EH20C replace what would otherwise be a CPU plus separate DUART, DMA, and glue-logic chips.
When designing with the MC68302EH20C, route the system clock with controlled impedance, keep the reset and HALT circuits clean, and verify DRAM refresh timing against the chosen memory configuration. Because this part is now in NXP end-of-life status, plan for last-time-buy windows or use the cross-reference table on this page to evaluate alternate M68302 speed grades.
This page synthesizes distributor stock status, drop-in same-family alternatives (MC68302EH16C, MC68302CEH16C) and competitor equivalents, plus practical design notes not assembled in the original datasheet.
Аналоги без доработки для MC68302EH20C — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с MC68302EH20C (тот же форм-фактор и посадочное место) — отличается по Data Bus Width, Package, Instruction Set, Maximum Clock Frequency, Mounting Type.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
MC68302EH16C
✅ Прямая замена✓ В наличии
$17.1 / шт.
Открыть даташит →MC68302CEH16C
✅ Прямая замена✓ В наличии
$49.9 / шт.
Открыть даташит →MC68302EH20B
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MC68302EH20C Максимальные параметры и электрические характеристики
| Family | M68000 / M683xx |
| Core | M68000 (8/16-bit external data bus) |
| Number of Cores | 1 |
| Разрядность шины данных | 8/16-bit |
| Address Bus Width | 24-bit |
| Максимальная тактовая частота | 20 MHz |
| Speed Grade Suffix | EH20 (20 MHz, high-speed) |
| Package Suffix | C (PQFP plastic) |
| Корпус | 132-PQFP (24.13 x 24.13 mm) |
| Число выводов | 132 |
| Тип монтажа | Surface Mount |
| Напряжение питания | 5 V nominal |
| On-chip Peripherals | 3 SCC, IDMA, Chip-Select, Timers, Watchdog, Parallel I/O |
| Instruction Set | M68000 (56 base instructions + extensions) |
Конфигурация выводов MC68302EH20C
| Контакт 1 | A23 — Address bus bit 23 |
| Контакт 2 | A22 — Address bus bit 22 |
| Контакт 3 | A21 — Address bus bit 21 |
| Контакт 4 | A20 — Address bus bit 20 |
| Контакт 5 | A19 — Address bus bit 19 |
| Контакт 6 | A18 — Address bus bit 18 |
| Контакт 7 | A17 — Address bus bit 17 |
| Контакт 8 | A16 — Address bus bit 16 |
| Контакт 9 | A15 — Address bus bit 15 |
| Контакт 10 | A14 — Address bus bit 14 |
| Контакт 11 | A13 — Address bus bit 13 |
| Контакт 12 | A12 — Address bus bit 12 |
| Контакт 13 | A11 — Address bus bit 11 |
| Контакт 14 | A10 — Address bus bit 10 |
| Контакт 15 | A9 — Address bus bit 9 |
| Контакт 16 | A8 — Address bus bit 8 |
| Контакт 17 | A7 — Address bus bit 7 |
| Контакт 18 | A6 — Address bus bit 6 |
| Контакт 19 | A5 — Address bus bit 5 |
| Контакт 20 | A4 — Address bus bit 4 |
| Контакт 21 | A3 — Address bus bit 3 |
| Контакт 22 | A2 — Address bus bit 2 |
| Контакт 23 | A1 — Address bus bit 1 |
| Контакт 24 | A0 — Address bus bit 0 |
| Контакт 25 | D15 — Data bus bit 15 |
| Контакт 26 | D14 — Data bus bit 14 |
| Контакт 27 | D13 — Data bus bit 13 |
| Контакт 28 | D12 — Data bus bit 12 |
| Контакт 29 | D11 — Data bus bit 11 |
| Контакт 30 | D10 — Data bus bit 10 |
| Контакт 31 | D9 — Data bus bit 9 |
| Контакт 32 | D8 — Data bus bit 8 |
| Контакт 33 | D7 — Data bus bit 7 |
| Контакт 34 | D6 — Data bus bit 6 |
| Контакт 35 | D5 — Data bus bit 5 |
| Контакт 36 | D4 — Data bus bit 4 |
| Контакт 37 | D3 — Data bus bit 3 |
| Контакт 38 | D2 — Data bus bit 2 |
| Контакт 39 | D1 — Data bus bit 1 |
| Контакт 40 | D0 — Data bus bit 0 |
| Контакт 41 | VCC — +5V supply |
| Контакт 42 | GND — Ground |
| Контакт 43 | CLKIN — System clock input |
| Контакт 44 | RESET — Reset input (active low) |
| Контакт 45 | HALT — Halt input (active low) |
| Контакт 46 | AS — Address Strobe |
| Контакт 47 | DS — Data Strobe |
| Контакт 48 | R/W — Read/Write control |
| Контакт 49 | BR — Bus Request |
| Контакт 50 | BG — Bus Grant |
| Контакт 51 | BGACK — Bus Grant Acknowledge |
| Контакт 52 | IPL0 — Interrupt Priority Level 0 |
| Контакт 53 | IPL1 — Interrupt Priority Level 1 |
| Контакт 54 | IPL2 — Interrupt Priority Level 2 |
| Контакт 55 | FC0 — Function Code 0 |
| Контакт 56 | FC1 — Function Code 1 |
| Контакт 57 | FC2 — Function Code 2 |
| Контакт 58 | CS0 — Chip Select 0 |
| Контакт 59 | CS1 — Chip Select 1 |
| Контакт 60 | CS2 — Chip Select 2 |
| Контакт 61 | CS3 — Chip Select 3 |
| Контакт 62 | CS4 — Chip Select 4 |
| Контакт 63 | CS5 — Chip Select 5 |
| Контакт 64 | CS6 — Chip Select 6 |
| Контакт 65 | CS7 — Chip Select 7 |
| Контакт 66 | PA0 — Parallel I/O Port A bit 0 |
| Контакт 67 | PA1 — Parallel I/O Port A bit 1 |
| Контакт 68 | PA2 — Parallel I/O Port A bit 2 |
| Контакт 69 | PA3 — Parallel I/O Port A bit 3 |
| Контакт 70 | PA4 — Parallel I/O Port A bit 4 |
| Контакт 71 | PA5 — Parallel I/O Port A bit 5 |
| Контакт 72 | PA6 — Parallel I/O Port A bit 6 |
| Контакт 73 | PA7 — Parallel I/O Port A bit 7 |
| Контакт 74 | PA8 — Parallel I/O Port A bit 8 |
| Контакт 75 | PA9 — Parallel I/O Port A bit 9 |
| Контакт 76 | PA10 — Parallel I/O Port A bit 10 |
| Контакт 77 | PA11 — Parallel I/O Port A bit 11 |
| Контакт 78 | PA12 — Parallel I/O Port A bit 12 |
| Контакт 79 | PA13 — Parallel I/O Port A bit 13 |
| Контакт 80 | PA14 — Parallel I/O Port A bit 14 |
| Контакт 81 | PA15 — Parallel I/O Port A bit 15 |
| Контакт 82 | PB0 — Parallel I/O Port B bit 0 |
| Контакт 83 | PB1 — Parallel I/O Port B bit 1 |
| Контакт 84 | PB2 — Parallel I/O Port B bit 2 |
| Контакт 85 | PB3 — Parallel I/O Port B bit 3 |
| Контакт 86 | PB4 — Parallel I/O Port B bit 4 |
| Контакт 87 | PB5 — Parallel I/O Port B bit 5 |
| Контакт 88 | PB6 — Parallel I/O Port B bit 6 |
| Контакт 89 | PB7 — Parallel I/O Port B bit 7 |
| Контакт 90 | PB8 — Parallel I/O Port B bit 8 |
| Контакт 91 | PB9 — Parallel I/O Port B bit 9 |
| Контакт 92 | PB10 — Parallel I/O Port B bit 10 |
| Контакт 93 | PB11 — Parallel I/O Port B bit 11 |
| Контакт 94 | PB12 — Parallel I/O Port B bit 12 |
| Контакт 95 | PB13 — Parallel I/O Port B bit 13 |
| Контакт 96 | PB14 — Parallel I/O Port B bit 14 |
| Контакт 97 | PB15 — Parallel I/O Port B bit 15 |
| Контакт 98 | TXD1 — SCC1 Transmit Data |
| Контакт 99 | RXD1 — SCC1 Receive Data |
| Контакт 100 | RTS1 — SCC1 Request To Send |
| Контакт 101 | CTS1 — SCC1 Clear To Send |
| Контакт 102 | CD1 — SCC1 Carrier Detect |
| Контакт 103 | TXD2 — SCC2 Transmit Data |
| Контакт 104 | RXD2 — SCC2 Receive Data |
| Контакт 105 | RTS2 — SCC2 Request To Send |
| Контакт 106 | CTS2 — SCC2 Clear To Send |
| Контакт 107 | CD2 — SCC2 Carrier Detect |
| Контакт 108 | TXD3 — SCC3 Transmit Data |
| Контакт 109 | RXD3 — SCC3 Receive Data |
| Контакт 110 | RTS3 — SCC3 Request To Send |
| Контакт 111 | CTS3 — SCC3 Clear To Send |
| Контакт 112 | CD3 — SCC3 Carrier Detect |
| Контакт 113 | TIN1 — Timer 1 Input |
| Контакт 114 | TOUT1 — Timer 1 Output |
| Контакт 115 | TIN2 — Timer 2 Input |
| Контакт 116 | TOUT2 — Timer 2 Output |
| Контакт 117 | DREQ — IDMA Request |
| Контакт 118 | DACK — IDMA Acknowledge |
| Контакт 119 | DONE — IDMA Done |
| Контакт 120 | VCC — +5V supply |
| Контакт 121 | GND — Ground |
| Контакт 122 | AVEC — Autovector |
| Контакт 123 | DSACK0 — Data Transfer and Size Acknowledge 0 |
| Контакт 124 | DSACK1 — Data Transfer and Size Acknowledge 1 |
| Контакт 125 | BERR — Bus Error |
| Контакт 126 | BR0 — Bus Request 0 |
| Контакт 127 | BR1 — Bus Request 1 |
| Контакт 128 | TA — Transfer Acknowledge |
| Контакт 129 | TBI — Transfer Burst Inhibit |
| Контакт 130 | RMC — Read-Modify-Write Cycle |
| Контакт 131 | MMUDIS — MMU Disable |
| Контакт 132 | VCC — +5V supply |
Типичное применение
MC68302EH20C подходит для 6 применениеs: Multi-Protocol Serial Communications Front-End, Industrial Router and Bridge Controller, ISDN Terminal Adapter, Telecom Line Card and Channel Bank, Legacy Point-of-Sale Terminal, Factory-Automation Controller (Legacy).
Multi-Protocol Serial Communications Front-End
The MC68302EH20C's three on-chip Serial Communications Controllers (SCCs) and Independent DMA controller (IDMA) make it a natural fit for multi-protocol serial front-ends. Each SCC supports HDLC/SDLC, async, BISYNC, and transparent protocols, so a single 20 MHz device replaces a CPU plus three external DUARTs. In WAN-edge and serial-bridge designs the part offloads framing and DMA, leaving the M68000 core free to run routing or control firmware with no router restarts.
Рекомендуется
Industrial Router and Bridge Controller
Integrated chip-select logic, dual timers, parallel I/O and three SCCs let the MC68302EH20C serve as a one-chip industrial router or field-bridge controller. The on-chip peripheral integration reduces board area and BOM count versus a CPU-plus-glue design. At 20 MHz and 5 V the part delivers deterministic interrupt latency suitable for serial-field bridging on factory floors, and the watchdog timer protects unattended installations from firmware hangs.
Рекомендуется
ISDN Terminal Adapter
The MC68302EH20C was specifically designed for ISDN terminal-adapter and basic-rate-access designs, leveraging its three SCCs to terminate the ISDN BRI 'S' interface, drive an external codec, and maintain the D-channel signaling stack. The 20 MHz EH20C speed grade provides the throughput needed for ISDN call control plus echo-cancellation firmware, while the 5 V tolerant bus interfaces cleanly to legacy analog line interfaces.
Рекомендуется
Telecom Line Card and Channel Bank
Central-office line cards and channel banks historically deployed the MC68302EH20C because each SCC terminates a T1/E1 timeslot and the IDMA streams PCM samples to and from a serial backplane without CPU intervention. The 132-pin PQFP provides enough I/O for backplane glue and per-channel control, and the chip-select block can directly drive framers and codecs without external logic.
Рекомендуется
Legacy Point-of-Sale Terminal
POS terminals that need multiple serial ports for barcode scanners, receipt printers, and PIN pads historically use the MC68302EH20C because the three on-chip SCCs and parallel I/O handle all peripherals in a single chip. The integrated chip-select logic also drives character LCDs and keypads directly. While the part is EOL, deployed fleets continue to use it for service and repair with distributor-bonded stock.
Рекомендуется
Factory-Automation Controller (Legacy)
Discrete I/O, timers, and three SCCs make the MC68302EH20C a viable single-chip PLC-like controller for legacy factory-automation cells running RS-485 multi-drop fieldbuses. The 5 V supply and 132-pin PQFP remain compatible with 1990s-era backplanes, easing field-sustainment. The watchdog and chip-select block enable deterministic safety behaviors required by industrial standards of the era.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MC68302EH20C — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MC68302EH16C | MC68302CEH16C | MC68302EH20B |
|---|---|---|---|---|
| Package | 132-PQFP (24.13x24.13) | 132-PQFP (24.13x24.13) - same | 132-PQFP (24.13x24.13) - same | 132-PQFP (24.13x24.13) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock Frequency | 20 MHz | 16 MHz (-20%) | 16 MHz (-20%) | 20 MHz (same) |
| Supply Voltage | 5 V | 5 V (same) | 5 V (same) | 5 V (same) |
| Data Bus Width | 8/16-bit | 8/16-bit (same) | 8/16-bit (same) | 8/16-bit (same) |
| On-chip SCCs | 3 | 3 (same) | 3 (same) | 3 (same) |
| IDMA Channels | 1 | 1 (same) | 1 (same) | 1 (same) |
| Lifecycle Status | EOL | EOL | EOL | EOL |
Ключевые отличия
- 20 MHz speed grade within M68302 family (против MC68302EH16C)
- Integrated communications engine (3 SCCs + IDMA) (против MC68040RC40A)
- 5 V supply tolerant I/O (против MC68302AG16VC)
Заметки по проектированию
Estimated: at 20 MHz with all three SCCs and IDMA active, the MC68302EH20C dissipates roughly 0.6-0.9 W. Provide at least one solid VCC/GND pair (pin 41/42, 120/121, 132/42) with low-impedance decoupling within 5 mm of each pair. Use 0.1 uF ceramic in parallel with 10 uF tantalum bulk; a 5 V linear regulator with adequate heatsinking is recommended over a switching regulator to keep ripple on the logic supply below 50 mVpp.
Because the MC68302EH20C is EOL, do not design a new production board around this part without a written last-time-buy commitment from NXP or a bonded-stock distributor. Stock and price fluctuate week-to-week, and counterfeit risk rises sharply for any lots arriving outside authorized channels. Use only franchised distributors or vetted independent brokers with documented traceability.
The 132-pin PQFP at 20 MHz places the design in moderate-speed territory; route the address and data buses as matched-length parallel groups with a 50 ohm controlled impedance and keep traces shorter than 75 mm where possible. Series-terminate the bus with 33 ohm resistors near the MPU for heavily loaded nets. Provide a clean RESET/HALT debounce circuit and verify clock-in duty cycle stays within 40-60%.
Информация о соответствии
Original PQFP variants from the 1990s predate RoHS - the EH20C and earlier C/EH grades are typically NOT RoHS compliant. Only later 'AG' 3.3 V variants carried RoHS marking. RoHS/REACH/AEC-Q100 status to be confirmed against the specific lot marking before qualification.
