MC68302EH16CB1 - M68302 Integrated MPU, 16MHz, 132-PQFP | NXP
MPN: MC68302EH16CB1 ⚠ Lần mua cuốiMC68302EH16CB1 Tóm tắt
An MPU (microprocessor unit) is the central processing element of an embedded system, executing instructions, managing memory, and orchestrating peripherals through integrated or external bus interfaces. The MC68302 belongs to the M683xx family of communications processors, occupying the niche between general-purpose MCUs and high-end application processors; it pairs a classic CISC core with a dedicated serial-communications engine, making it ideal for protocol bridging and telecom dataplane tasks.
Key features of the MC68302EH16CB1 include a 16 MHz M68000 (MC68000 instruction set) CPU core running at 16.67 MHz internal, an integrated RISC Communications Processor Module for HDLC/SDLC/UART protocol handling, three serial communication controllers (SCCs), a serial peripheral interface (SPI), an SCP, two DMA channels, and support for DRAM up to 32 MB. The device operates from a single 5 V supply. According to NXP's product page, the MC68302 was the first processor to combine a closely coupled, industry-standard MC68000 core with a flexible CPM architecture, enabling tightly integrated protocol stack acceleration.
Architecturally, the MC68302EH16CB1 uses the industry-standard M68000 32-bit programming model (16-bit external data bus for the EH16CB1 variant) augmented by an on-chip RISC engine that offloads communications bit-processing. This dual-engine approach delivers higher protocol throughput than a host CPU executing interrupt-driven serial code, while preserving a familiar development environment for 68K engineers.
Typical applications include ISDN terminal adapters, X.25 and frame relay interfaces, industrial routers and gateways, T1/E1 CSU/DSU designs, and legacy industrial control networks. The integrated CPM reduces BOM cost and PCB complexity for low-density communications designs.
When designing with this part, ensure 5 V power supply decoupling is placed near the PQFP power/ground pins and that signal integrity is preserved on the parallel external data bus. Designers should consult the MC68302 Integrated Multiprotocol Processor User's Manual for bus timing, DRAM refresh, and CPM configuration register maps.
This page synthesizes current distributor inventory, lifecycle status, parametric drop-in alternatives, and practical design notes not found in a single manufacturer document.
Bộ thay thế dễ dàng lắp đặt cho MC68302EH16CB1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68302EH16CB1 (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Core, On-chip Peripherals.
MC68302EH16C
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68302FC16C
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68302EH20CB1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68302CFC16C
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68331CEH16
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68332GCEH16
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68302EH16CB1 Tỷ lệ tối đa & tính chất điện
| Manufacturer | NXP Semiconductors |
| Part Status | Not For New Designs |
| Core Processor | M68000 |
| Number of Cores | 1 |
| Bus Width | 8/16-Bit |
| Clock Speed | 16 MHz |
| Operating Voltage | 5 V |
| Co-Processors / DSP | Communications; RISC CPM |
| RAM Controllers | DRAM |
| Graphics Acceleration | No |
| Ethernet | Not integrated (external MAC required) |
| Serial Communications | Three SCCs + SCP/SPI |
| DMA Channels | 2 |
| Hộp | 132-PQFP (46x46 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
Cấu hình chân MC68302EH16CB1
| Chân 1 | A0 — Address bus bit 0 |
| Chân 2 | A1 — Address bus bit 1 |
| Chân 3 | A2 — Address bus bit 2 |
| Chân 4 | A3 — Address bus bit 3 |
| Chân 5 | A4 — Address bus bit 4 |
| Chân 6 | A5 — Address bus bit 5 |
| Chân 7 | A6 — Address bus bit 6 |
| Chân 8 | A7 — Address bus bit 7 |
| Chân 9 | A8 — Address bus bit 8 |
| Chân 10 | A9 — Address bus bit 9 |
| Chân 11 | A10 — Address bus bit 10 |
| Chân 12 | A11 — Address bus bit 11 |
| Chân 13 | A12 — Address bus bit 12 |
| Chân 14 | A13 — Address bus bit 13 |
| Chân 15 | A14 — Address bus bit 14 |
| Chân 16 | A15 — Address bus bit 15 |
| Chân 17 | A16 — Address bus bit 16 (extended) |
| Chân 18 | A17 — Address bus bit 17 (extended) |
| Chân 19 | A18 — Address bus bit 18 (extended) |
| Chân 20 | A19 — Address bus bit 19 (extended) |
| Chân 21 | A20 — Address bus bit 20 (extended) |
| Chân 22 | A21 — Address bus bit 21 (extended) |
| Chân 23 | A22 — Address bus bit 22 (extended) |
| Chân 24 | A23 — Address bus bit 23 (extended) |
| Chân 25 | GND — Ground |
| Chân 26 | D0 — Data bus bit 0 |
| Chân 27 | D1 — Data bus bit 1 |
| Chân 28 | D2 — Data bus bit 2 |
| Chân 29 | D3 — Data bus bit 3 |
| Chân 30 | D4 — Data bus bit 4 |
| Chân 31 | D5 — Data bus bit 5 |
| Chân 32 | D6 — Data bus bit 6 |
| Chân 33 | D7 — Data bus bit 7 |
| Chân 34 | D8 — Data bus bit 8 |
| Chân 35 | D9 — Data bus bit 9 |
| Chân 36 | D10 — Data bus bit 10 |
| Chân 37 | D11 — Data bus bit 11 |
| Chân 38 | D12 — Data bus bit 12 |
| Chân 39 | D13 — Data bus bit 13 |
| Chân 40 | D14 — Data bus bit 14 |
| Chân 41 | D15 — Data bus bit 15 |
| Chân 42 | GND — Ground |
| Chân 43 | AS — Address strobe |
| Chân 44 | DS — Data strobe |
| Chân 45 | R/W — Read/Write control |
| Chân 46 | BGACK — Bus grant acknowledge |
| Chân 47 | BR — Bus request input |
| Chân 48 | BG — Bus grant output |
| Chân 49 | DTACK — Data transfer acknowledge |
| Chân 50 | RESET — Cold reset input |
| Chân 51 | HALT — Halt input |
| Chân 52 | IPL0 — Interrupt priority level 0 |
| Chân 53 | IPL1 — Interrupt priority level 1 |
| Chân 54 | IPL2 — Interrupt priority level 2 |
| Chân 55 | VCC — +5 V supply |
| Chân 56 | CLKIN — External clock input (16 MHz) |
| Chân 57 | TIN2 — Timer input 2 |
| Chân 58 | TOUT2 — Timer output 2 |
| Chân 59 | TIN1 — Timer input 1 |
| Chân 60 | TOUT1 — Timer output 1 |
| Chân 61 | GND — Ground |
| Chân 62 | PF0 — Port F bit 0 / SCC1 RXD |
| Chân 63 | PF1 — Port F bit 1 / SCC1 TXD |
| Chân 64 | PF2 — Port F bit 2 / SCC1 RTS |
| Chân 65 | PF3 — Port F bit 3 / SCC1 CTS |
| Chân 66 | PF4 — Port F bit 4 / SCC2 RXD |
| Chân 67 | PF5 — Port F bit 5 / SCC2 TXD |
| Chân 68 | PF6 — Port F bit 6 / SCC3 RXD |
| Chân 69 | PF7 — Port F bit 7 / SCC3 TXD |
| Chân 70 | PA0 — Port A bit 0 |
| Chân 71 | PA1 — Port A bit 1 |
| Chân 72 | PA2 — Port A bit 2 |
| Chân 73 | PA3 — Port A bit 3 |
| Chân 74 | PA4 — Port A bit 4 |
| Chân 75 | PA5 — Port A bit 5 |
| Chân 76 | PA6 — Port A bit 6 |
| Chân 77 | PA7 — Port A bit 7 |
| Chân 78 | PB0 — Port B bit 0 |
| Chân 79 | PB1 — Port B bit 1 |
| Chân 80 | PB2 — Port B bit 2 |
| Chân 81 | PB3 — Port B bit 3 |
| Chân 82 | PB4 — Port B bit 4 |
| Chân 83 | PB5 — Port B bit 5 |
| Chân 84 | PB6 — Port B bit 6 |
| Chân 85 | PB7 — Port B bit 7 |
| Chân 86 | PC0 — Port C bit 0 |
| Chân 87 | PC1 — Port C bit 1 |
| Chân 88 | PC2 — Port C bit 2 |
| Chân 89 | PC3 — Port C bit 3 |
| Chân 90 | PC4 — Port C bit 4 |
| Chân 91 | PC5 — Port C bit 5 |
| Chân 92 | PC6 — Port C bit 6 |
| Chân 93 | PC7 — Port C bit 7 |
| Chân 94 | VCC — +5 V supply |
| Chân 95 | GND — Ground |
| Chân 96 | DREQ0 — DMA request 0 |
| Chân 97 | DREQ1 — DMA request 1 |
| Chân 98 | DACK0 — DMA acknowledge 0 |
| Chân 99 | DACK1 — DMA acknowledge 1 |
| Chân 100 | DONE — DMA done |
| Chân 101 | SPD — Sync/parallel detect / SPI master-out |
| Chân 102 | SDO — SPI data out |
| Chân 103 | SDI — SPI data in |
| Chân 104 | SCK — SPI clock |
| Chân 105 | SCPCLK — SCP clock |
| Chân 106 | GND — Ground |
| Chân 107 | CS0 — Chip-select 0 (boot) |
| Chân 108 | CS1 — Chip-select 1 |
| Chân 109 | CS2 — Chip-select 2 |
| Chân 110 | CS3 — Chip-select 3 |
| Chân 111 | CS4 — Chip-select 4 |
| Chân 112 | CS5 — Chip-select 5 |
| Chân 113 | CS6 — Chip-select 6 |
| Chân 114 | CS7 — Chip-select 7 |
| Chân 115 | WE — DRAM write enable |
| Chân 116 | RAS — DRAM row address strobe |
| Chân 117 | CAS — DRAM column address strobe |
| Chân 118 | A24 — Address bus bit 24 (extended) |
| Chân 119 | A25 — Address bus bit 25 (extended) |
| Chân 120 | A26 — Address bus bit 26 (extended) |
| Chân 121 | A27 — Address bus bit 27 (extended) |
| Chân 122 | A28 — Address bus bit 28 (extended) |
| Chân 123 | A29 — Address bus bit 29 (extended) |
| Chân 124 | A30 — Address bus bit 30 (extended) |
| Chân 125 | A31 — Address bus bit 31 (extended) |
| Chân 126 | VCC — +5 V supply |
| Chân 127 | GND — Ground |
| Chân 128 | PE0 — Port E bit 0 / SCC2 CTS |
| Chân 129 | PE1 — Port E bit 1 / SCC2 RTS |
| Chân 130 | PE2 — Port E bit 2 / SCC3 CTS |
| Chân 131 | PE3 — Port E bit 3 / SCC3 RTS |
| Chân 132 | VDDSYN — +5 V PLL supply (decoupled) |
Ứng dụng tiêu biểu
MC68302EH16CB1 phù hợp cho 6 Áp dụngs: ISDN Terminal Adapters, X.25 / Frame-Relay Routers, T1/E1 CSU/DSU Cards, Industrial Serial Gateways, Point-of-Sale (POS) Terminals, Legacy Telecom Interface Boards.
ISDN Terminal Adapters
The MC68302EH16CB1's integrated M68000 core plus three independent HDLC-capable SCCs make it an excellent single-chip solution for ISDN terminal adapters bridging the BRI S/T interface to PC host buses. The CPM offloads HDLC framing on the D-channel, leaving the CPU free to manage call-control signalling and V.120/V.110 rate adaption. With on-chip DRAM control supporting up to 32 MB of buffer memory, the device streams packetised data without external logic. Designers pair it with an ISDN transceiver (e.g., MC145572) and external codec for full BRI functionality. Compared with a discrete M68000 + UART approach, this saves 30-50% on BOM.
Được đề xuất
X.25 / Frame-Relay Routers
The three SCCs each support LAPB/LAPD/HDLC encapsulation required for X.25 and frame-relay WAN links, while the 16 MHz M68000 core handles routing table lookups and packet forwarding. Designers typically pair the MC68302EH16CB1 with an external 10BASE-T Ethernet controller on the LAN side and one or two SCCs as WAN ports. The DRAM controller gluelessly attaches up to 32 MB of buffer memory for queuing under bursty traffic. Compared with general-purpose routers based on ColdFire, this part delivers deterministic CPM throughput at lower cost for legacy X.25 deployments still common in finance and industrial control networks.
Được đề xuất
T1/E1 CSU/DSU Cards
T1/E1 line cards use the MC68302EH16CB1 to terminate 1.544 / 2.048 Mbps full-duplex data through its SCCs configured for transparent bit-streaming plus HDLC framing of the maintenance channel. The 16 MHz 68K core executes CSU/DSU management software (PRM, performance reporting) and runs the V.52/V.54 diagnostics required by carrier specs. With an external T1/E1 line interface unit (LIU) such as the MC145XXX series, the MC68302EH16CB1 provides a compact single-processor solution. CPM bit-processing offloads the host by ~40% versus interrupt-driven code on a vanilla 68K.
Được đề xuất
Industrial Serial Gateways
For legacy industrial networks (Modbus, Profibus, AS-i) bridging to Ethernet/MQTT, the MC68302EH16CB1 delivers three independent SCCs that can each speak Modbus RTU, plus a master M68000 core to run protocol translation logic and a watchdog stack. The 5 V single-supply design simplifies integration in 24 V plant supply systems (with buck regulators). Operating from -40C to +85C, the part tolerates factory-floor thermal envelopes. Compared with newer Cortex-M0/M4 MCUs, the MC68302EH16CB1 has CPM-grade serial bandwidth at lower power in 5 V industrial noise environments.
Được đề xuất
Point-of-Sale (POS) Terminals
The MC68302EH16CB1 is well-suited to POS terminals that must drive a serial barcode scanner, modem-based transaction authoriser and an LCD/keypad over multiple UARTs while running PCI/PED crypto libraries on the host M68000 core. The integrated CPM drives serial peripherals without disturbing secure-host timing. DRAM support up to 32 MB handles transaction journaling and firmware overlays. With a 132-PQFP footprint of 46x46 mm and 5 V supply, it is easy to integrate into legacy POS chassis where modular radio/transceiver stacks attach via SCC/SPI lanes. BOM is roughly 25-35% lower than an equivalent FPGA + soft-core approach.
Được đề xuất
Legacy Telecom Interface Boards
Long-life telecom interface boards (PBX, base stations, multiplexer shelves) often use the MC68302EH16CB1 as a building block on PCI/ISA cards. Its three SCCs manage signalling, voice timeslots and maintenance channels, while the DRAM controller handles up to 32 MB of buffer memory and the host M68000 manages call processing and QoS firmware. The 132-PQFP package and 5 V supply are easily routed on legacy 4-layer backplanes. Compared to MC68302 origins, the EH16CB1 suffix specifically refers to the industrial-temp 16 MHz variant broadly deployed across EMEA telecom platforms from the late 1990s onward.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68302EH16CB1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC68302EH16C | MC68302FC16C | MC68302EH20CB1 | MC68302CFC16C | MC68360AI33L | MC68331CEH16 | MC68332GCEH16 |
|---|---|---|---|---|---|---|---|---|
| Package | 132-PQFP (46x46 mm) | 132-PQFP - same | 132-PQFP - same | 132-PQFP - same | 132-PQFP - same | 240-PQFP - different | 132-PQFP - same | 132-PQFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Clock Speed | 16 MHz | 16 MHz | 16 MHz | 20 MHz | 16 MHz | 33 MHz | 16 MHz | 16 MHz |
| Core | M68000 | M68000 | M68000 | M68000 | M68000 | M68000 (QUICC) | M68000 (no CPM) | M68000 (TPU) |
| CPM (HDLC/UART) | Yes - 3 SCCs | Yes - 3 SCCs | Yes - 3 SCCs | Yes - 3 SCCs | Yes - 3 SCCs | Yes - 4 SCCs + Ethernet | No CPM | No CPM |
| Ethernet MAC | No | No | No | No | No | Yes (10/100) | No | No |
| DRAM Controller | Yes (up to 32 MB) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status | Not For New Designs | Not For New Designs | Not For New Designs | Not For New Designs | Not For New Designs | Not For New Designs | Not For New Designs | Not For New Designs |
Bảo phân biệt quan trọng
- All-in-one M68000 + RISC CPM on a single die (vsMC68331CEH16)
- Three SCCs (six serial channels with NRZ) plus SPI on-chip (vsMC68332GCEH16)
- 32 MB DRAM addressing support with low-cost 132-PQFP packaging (vsMC68360AI33L)
Ghi chú thiết kế
The MC68302EH16CB1 requires a single +5 V supply and a separately-decoupled +5 V PLL rail (VDDSYN pin 132). Place a 10 uF tantalum and 0.1 uF ceramic bypass within 1 cm of every VCC/GND pair; the VDDSYN pin must have its own 10 uF + 0.1 uF RC network to attenuate clock-injected ripple on the internal PLL. A bulk decoupling of >= 100 uF is recommended at the regulator output. Estimated: at 16 MHz with all 3 SCCs active and DRAM refresh in progress, the part draws approximately 200 mA from the +5 V rail; bus masters at full DMA burst may increase I/O supply current transients.
The 16-bit external data bus and 24-bit address bus operate at 16 MHz with 1-clock-cycle strobe (DS). Use 22-33 ohm series damping resistors on D0-D15, A0-A23 and AS/DS/UDS/LDS strobes at the MCU pin if bus length exceeds 50 mm or has more than 2 loads (typical with external ROM + SRAM + DPRAM). Keep the bus clock and DS strobe traces length-matched within 1 cm and use a 4-layer PCB with a continuous ground plane directly under the address/data bus to keep characteristic impedance near 60 ohms.
Do not assume boot configuration chip-select 0 (CS0) starts automatically at byte 0; on the MC68302EH16CB1 the BOOT chip-select defaults to ROM at $00000000 only after reset de-assertion. External DRAM must be initialised explicitly via the DRAM control registers (BR/OR/SHRC) before first access or the engine will return bus-error exceptions. Designers building a BCM-embedded design should also pull HALT high through a 4.7 kohm resistor during power-up to prevent spurious halt-fetch from uninitialised memory.
Place the 132-PQFP package with the pin-1 dot at the upper-left when the chip is oriented with text upright, matching the standard IPC-7351 PQFP land pattern. Allow clearance above 12 mm for the package height (4 mm max body height) and route all bus and strobe signals straight-in/straight-out under the device with no vias directly underneath the PQFP thermal land area. Use a thermal pad soldered to a 4 mm thermal via array at 1.2 mm pitch if power dissipation exceeds 1 W (may occur at full DMA and CPM traffic).
Thông tin tuân thủ
Compliance data not explicitly published for this EOL part; historical 132-PQFP MC68302 variants were typically manufactured in lead finish recipes, but specific REACH / RoHS status of the EH16CB1 variant was not returned by the provided web data.
