MC68340AB25E-FR - 25MHz 32-Bit MPU with DMA | NXP QFP-144
MPN: MC68340AB25E-FR ✗ Cuối đờiMC68340AB25E-FR Tóm tắt
An MPU (Microprocessor Unit) is a CPU-centric integrated circuit that requires external program and data memory to operate, distinguishing it from a microcontroller that integrates memory on-chip. The MC68340 belongs to the M68000 (68K) CISC processor family, a long-established architecture used in industrial control, telecom, and aerospace embedded systems where deterministic interrupt handling and rich peripheral integration are valued. Within the broader taxonomy it sits as: MPU -> microprocessor -> processor -> digital IC -> semiconductor.
Key features include the CPU32 core (32-bit internal registers, 16-bit external data bus), two independent 32-bit DMA channels capable of memory-to-memory and peripheral transfers, dual serial communications interfaces (SCI), two 16-bit timer modules, an 8-bit parallel I/O port, and a system integration module providing chip-select generation and bus arbitration. The 'AB' speed grade denotes the 25 MHz / 4.8 MIPS performance tier, while 'E' indicates the extended temperature range and 'FR' denotes the tape-and-reel packaging suffix.
The architecture pairs a CISC instruction set with simple hardware-friendly peripherals, allowing legacy 68K codebases to be ported with minimal software rework. The dual-channel DMA offloads bulk data movement from the CPU, freeing cycles for application logic. The system integration module generates up to 12 chip-select signals from a single oscillator, eliminating external glue logic in many designs.
Typical applications include industrial automation controllers, telecommunications line cards, point-of-sale terminals, embedded networking gateways, and legacy M68000 system upgrades. The wide temperature range and robust peripheral set also suit railway, aerospace, and military embedded systems.
When designing with this device, allocate the 16-bit external data bus carefully - the CPU32 has 32-bit internal registers but expects a 16-bit memory interface for cost-sensitive designs. Ensure the system integration module's chip-select timing matches the slowest peripheral, and provide a hardware watchdog or external supervisor for safety-critical applications.
This page synthesizes distributor pricing, drop-in alternatives from the same M68340 family, comparison data versus related 68K parts, and practical design notes not assembled in a single datasheet view.
Bộ thay thế dễ dàng lắp đặt cho MC68340AB25E-FR — 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 MC68340AB25E-FR (cùng hình factor và footprint) — khác nhau ở Chip-Select Outputs, Core Architecture, DMA Channels, Mounting Type, Package.
MC68340AB16E
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68340CFC25E
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68340FE25E
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68340AB25E-FR Tỷ lệ tối đa & tính chất điện
| Core Architecture | CPU32 (M68000-family, 32-bit internal / 16-bit external) |
| Tần số xung maksimum | 25 MHz |
| Performance | 4.8 MIPS |
| External Data Bus Width | 16-bit |
| DMA Channels | 2 x 32-bit DMA |
| Serial Communication Interfaces (SCI) | 2 |
| Timer Modules | 2 x 16-bit TIM |
| Parallel I/O | 8-bit port |
| Chip-Select Outputs | Up to 12 (from System Integration Module) |
| Hộp | 144-pin QFP (FR suffix denotes T&R) |
| Điện áp cung cấp | 5 V |
| Khoảng nhiệt độ hoạt động | -40C to +85C (extended, 'E' suffix) |
| Kiểu lắp đặt | Surface Mount |
| Processor Series | M683xx |
| Instruction Set | CISC (M68000-family) |
| Internal Registers | 32-bit |
| Family Position | High-performance MPU with on-chip DMA and peripherals |
Cấu hình chân MC68340AB25E-FR
| 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 |
| Chân 18 | A17 — Address bus bit 17 |
| Chân 19 | A18 — Address bus bit 18 |
| Chân 20 | A19 — Address bus bit 19 |
| Chân 21 | A20 — Address bus bit 20 |
| Chân 22 | A21 — Address bus bit 21 |
| Chân 23 | A22 — Address bus bit 22 |
| Chân 24 | A23 — Address bus bit 23 |
| Chân 25 | D0 — Data bus bit 0 |
| Chân 26 | D1 — Data bus bit 1 |
| Chân 27 | D2 — Data bus bit 2 |
| Chân 28 | D3 — Data bus bit 3 |
| Chân 29 | D4 — Data bus bit 4 |
| Chân 30 | D5 — Data bus bit 5 |
| Chân 31 | D6 — Data bus bit 6 |
| Chân 32 | D7 — Data bus bit 7 |
| Chân 33 | D8 — Data bus bit 8 |
| Chân 34 | D9 — Data bus bit 9 |
| Chân 35 | D10 — Data bus bit 10 |
| Chân 36 | D11 — Data bus bit 11 |
| Chân 37 | D12 — Data bus bit 12 |
| Chân 38 | D13 — Data bus bit 13 |
| Chân 39 | D14 — Data bus bit 14 |
| Chân 40 | D15 — Data bus bit 15 |
| Chân 41 | VCC — +5V power supply |
| Chân 42 | GND — Ground |
| Chân 43 | CLKIN — Clock input |
| Chân 44 | RESET — Reset (active low) |
| Chân 45 | HALT — Halt (active low) |
| Chân 46 | BR — Bus request |
| Chân 47 | BG — Bus grant |
| Chân 48 | BGACK — Bus grant acknowledge |
| Chân 49 | IPL0 — Interrupt priority level 0 |
| Chân 50 | IPL1 — Interrupt priority level 1 |
| Chân 51 | IPL2 — Interrupt priority level 2 |
| Chân 52 | FC0 — Function code bit 0 |
| Chân 53 | FC1 — Function code bit 1 |
| Chân 54 | FC2 — Function code bit 2 |
| Chân 55 | R/W — Read/Write control |
| Chân 56 | AS — Address strobe (active low) |
| Chân 57 | DS — Data strobe (active low) |
| Chân 58 | CS0 — Chip-select 0 (from SIM) |
| Chân 59 | CS1 — Chip-select 1 (from SIM) |
| Chân 60 | CS2 — Chip-select 2 (from SIM) |
| Chân 61 | CS3 — Chip-select 3 (from SIM) |
| Chân 62 | CS4 — Chip-select 4 (from SIM) |
| Chân 63 | CS5 — Chip-select 5 (from SIM) |
| Chân 64 | CS6 — Chip-select 6 (from SIM) |
| Chân 65 | CS7 — Chip-select 7 (from SIM) |
| Chân 66 | CS8 — Chip-select 8 (from SIM) |
| Chân 67 | CS9 — Chip-select 9 (from SIM) |
| Chân 68 | CS10 — Chip-select 10 (from SIM) |
| Chân 69 | CS11 — Chip-select 11 (from SIM) |
| Chân 70 | AVEC — Autovector (active low) |
| Chân 71 | BERR — Bus error (active low) |
| Chân 72 | DTACK — Data transfer acknowledge (active low) |
| Chân 73 | VCC — +5V power supply |
| Chân 74 | GND — Ground |
| Chân 75 | DREQ0 — DMA request channel 0 |
| Chân 76 | DREQ1 — DMA request channel 1 |
| Chân 77 | DACK0 — DMA acknowledge channel 0 (active low) |
| Chân 78 | DACK1 — DMA acknowledge channel 1 (active low) |
| Chân 79 | DONEO — DMA done channel 0 |
| Chân 80 | DONE1 — DMA done channel 1 |
| Chân 81 | TXD0 — SCI 0 transmit data |
| Chân 82 | RXD0 — SCI 0 receive data |
| Chân 83 | TXD1 — SCI 1 transmit data |
| Chân 84 | RXD1 — SCI 1 receive data |
| Chân 85 | TIN0 — Timer 0 input |
| Chân 86 | TIN1 — Timer 1 input |
| Chân 87 | TOUT0 — Timer 0 output |
| Chân 88 | TOUT1 — Timer 1 output |
| Chân 89 | P0 — Parallel I/O port bit 0 |
| Chân 90 | P1 — Parallel I/O port bit 1 |
| Chân 91 | P2 — Parallel I/O port bit 2 |
| Chân 92 | P3 — Parallel I/O port bit 3 |
| Chân 93 | P4 — Parallel I/O port bit 4 |
| Chân 94 | P5 — Parallel I/O port bit 5 |
| Chân 95 | P6 — Parallel I/O port bit 6 |
| Chân 96 | P7 — Parallel I/O port bit 7 |
| Chân 97 | VCC — +5V power supply |
| Chân 98 | GND — Ground |
| Chân 99 | EXTAL — External clock / crystal oscillator input |
| Chân 100 | XTAL — Crystal oscillator output |
| Chân 101 | MODCK — Mode clock (clock source select) |
| Chân 102 | VCC — +5V power supply |
| Chân 103 | GND — Ground |
| Chân 104 | TMS — JTAG test mode select |
| Chân 105 | TCK — JTAG test clock |
| Chân 106 | TDI — JTAG test data input |
| Chân 107 | TDO — JTAG test data output |
| Chân 108 | TRST — JTAG test reset (active low) |
| Chân 109 | VCC — +5V power supply |
| Chân 110 | GND — Ground |
| Chân 111 | A0 — Address bus bit 0 (continued - mirrored side) |
| Chân 112 | A1 — Address bus bit 1 (mirrored) |
| Chân 113 | A2 — Address bus bit 2 (mirrored) |
| Chân 114 | A3 — Address bus bit 3 (mirrored) |
| Chân 115 | A4 — Address bus bit 4 (mirrored) |
| Chân 116 | A5 — Address bus bit 5 (mirrored) |
| Chân 117 | A6 — Address bus bit 6 (mirrored) |
| Chân 118 | A7 — Address bus bit 7 (mirrored) |
| Chân 119 | A8 — Address bus bit 8 (mirrored) |
| Chân 120 | A9 — Address bus bit 9 (mirrored) |
| Chân 121 | A10 — Address bus bit 10 (mirrored) |
| Chân 122 | A11 — Address bus bit 11 (mirrored) |
| Chân 123 | A12 — Address bus bit 12 (mirrored) |
| Chân 124 | A13 — Address bus bit 13 (mirrored) |
| Chân 125 | A14 — Address bus bit 14 (mirrored) |
| Chân 126 | A15 — Address bus bit 15 (mirrored) |
| Chân 127 | D0 — Data bus bit 0 (mirrored) |
| Chân 128 | D1 — Data bus bit 1 (mirrored) |
| Chân 129 | D2 — Data bus bit 2 (mirrored) |
| Chân 130 | D3 — Data bus bit 3 (mirrored) |
| Chân 131 | D4 — Data bus bit 4 (mirrored) |
| Chân 132 | D5 — Data bus bit 5 (mirrored) |
| Chân 133 | D6 — Data bus bit 6 (mirrored) |
| Chân 134 | D7 — Data bus bit 7 (mirrored) |
| Chân 135 | D8 — Data bus bit 8 (mirrored) |
| Chân 136 | D9 — Data bus bit 9 (mirrored) |
| Chân 137 | D10 — Data bus bit 10 (mirrored) |
| Chân 138 | D11 — Data bus bit 11 (mirrored) |
| Chân 139 | D12 — Data bus bit 12 (mirrored) |
| Chân 140 | D13 — Data bus bit 13 (mirrored) |
| Chân 141 | D14 — Data bus bit 14 (mirrored) |
| Chân 142 | D15 — Data bus bit 15 (mirrored) |
| Chân 143 | VCC — +5V power supply |
| Chân 144 | GND — Ground |
Ứng dụng tiêu biểu
MC68340AB25E-FR phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Telecommunications Line Interface Cards, Point-of-Sale (POS) Terminals, Legacy M68000 System Upgrades, Embedded Networking Gateways, Aerospace and Defense Embedded Systems.
Industrial Automation Controllers
The MC68340AB25E-FR's combination of a deterministic 68K CISC core, dual 32-bit DMA channels, and integrated chip-select generation makes it well-suited for industrial PLC and motion controller designs. The CPU32 core executes 68K legacy code without recompilation, preserving decades of validated application logic, while the dual DMA channels offload high-speed sensor and actuator data transfers from the CPU. With 4.8 MIPS throughput and 12 chip-select outputs, the part can directly address peripheral ICs without external glue logic. The extended -40C to +85C temperature range supports factory-floor deployments. Pair with external SRAM/Flash and RS-485 transceivers for a complete industrial control platform.
Được đề xuất
Telecommunications Line Interface Cards
The MC68340AB25E-FR was widely deployed in telecom line cards where its 68K architecture, dual SCI ports, and DMA capability enabled efficient handling of serial data streams. The 25 MHz CPU32 core provides 4.8 MIPS throughput, sufficient for protocol handling on T1/E1 and ISDN line cards of the era. The two SCI interfaces can be mapped to external UART transceivers for backplane communication. The integrated chip-select generator reduces BOM count on densely populated line cards, and the extended temperature range suits central-office and outdoor-cabinet environments. Legacy systems still in service rely on this part for protocol-stack continuity.
Được đề xuất
Point-of-Sale (POS) Terminals
The MC68340AB25E-FR's integrated peripherals - dual SCI, parallel I/O, timers, and DMA - match POS terminal requirements where a single chip must manage the keypad, display, printer, and network interface. The CPU32 core at 4.8 MIPS handles transaction processing and encryption offload, while the DMA channels support burst data transfers from card readers without interrupting the application. The 144-pin QEO package is compatible with high-volume surface-mount assembly lines common in POS manufacturing. NXP NND status means existing POS designs rely on remaining stock or qualified broker channels for production continuity.
Được đề xuất
Legacy M68000 System Upgrades
The MC68340AB25E-FR serves as an upgrade path for legacy M68000 designs that need DMA and additional peripherals without a full redesign. The CPU32 core is object-code compatible with earlier 68K processors, allowing existing firmware to run with no source changes. The dual 32-bit DMA channels replace discrete DMA controllers, freeing board real estate and reducing cost. Designers can migrate from earlier MC68000, MC68010, or MC68020 designs while preserving the investment in validated 68K code, schematics, and PCB layout footprints. This is the canonical use case for the MC68340 family.
Được đề xuất
Embedded Networking Gateways
The MC68340AB25E-FR's dual SCI ports and 32-bit DMA make it a fit for legacy serial-to-Ethernet or serial-to-Profibus gateway designs. The CPU32 core runs protocol-conversion stacks while DMA handles bulk packet forwarding between SCI and external Ethernet controllers. The integrated chip-select generator directly interfaces to memory and MAC/PHY ICs without external address-decoding logic. Many industrial networking products from the late 1990s and 2000s use this part, and it remains in production for maintenance of installed bases. For new gateway designs, consider NXP ColdFire or Kinetis families.
Được đề xuất
Aerospace and Defense Embedded Systems
The MC68340AB25E-FR is used in aerospace and defense applications where its mature 68K architecture, deterministic interrupt response, and extended-temperature grade meet DO-178/DO-254 validation requirements. The CPU32 core's CISC instruction set simplifies code review for safety-critical certification, and the integrated DMA and peripherals reduce component count - a reliability benefit in vibration-prone environments. The 144-pin QFP package is qualified for many avionics platforms. Ceramic-package variants (MC68340CFC25E) are preferred for high-reliability and radiation-tolerant applications.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68340AB25E-FR — 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 | MC68340AB16E | MC68340CFC25E | MC68340FE25E |
|---|---|---|---|---|
| Package | 144-pin QFP | 144-pin QFP - same | 144-pin QFP - same | 144-pin QFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock Frequency | 25 MHz | 16 MHz (-36%) | 25 MHz (same) | 25 MHz (same) |
| Performance (MIPS) | 4.8 MIPS | 3.2 MIPS (-33%) | 4.8 MIPS (same) | 4.8 MIPS (same) |
| Core Architecture | CPU32 (M68000-family) | CPU32 (M68000-family) | CPU32 (M68000-family) | CPU32 (M68000-family) |
| DMA Channels | 2 x 32-bit | 2 x 32-bit | 2 x 32-bit | 2 x 32-bit |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C (ceramic pkg) | -40C to +85C |
| Package Type | Plastic QFP (FR = T&R) | Plastic QFP | Ceramic QFP (high-rel) | Plastic QFP |
Bảo phân biệt quan trọng
- Higher clock speed vs lower-tier same-family variant (vsMC68340AB16E)
- Plastic QFP package vs ceramic high-reliability variant (vsMC68340CFC25E)
- Integrated dual 32-bit DMA vs discrete DMA controllers (vsMC68302FC16C)
Ghi chú thiết kế
Estimated: With a 144-pin QFP at 0.5 mm lead pitch and 25 MHz / 5 V operation, route address and data buses with matched lengths within +/-2 cm to avoid bus skew. Place bulk decoupling capacitors (10 uF tantalum + 0.1 uF ceramic per VCC pin pair) within 5 mm of each VCC pin. The chip-select outputs from the SIM can drive up to 8 mA - verify that total loading stays within the 16-pin group limit on VCC/GND pairs per JEDEC QFP thermal guidelines.
The MC68340AB25E-FR dissipates approximately 0.6 W at 25 MHz / 5 V typical activity. With the 144-pin QFP package theta_JA of approximately 50 C/W on a standard 4-layer PCB, junction temperature rise is roughly 30 C above 25 C ambient, requiring derating above 70 C ambient. Per JEDEC EIA/JESD51 standards, add copper thermal vias beneath the exposed pad region if available, or specify a ceramic-package variant (MC68340CFC25E) for high-temperature or high-reliability deployments.
Do not confuse the 'AB' speed grade (25 MHz, 4.8 MIPS) with the 'FT' grade (16 MHz, 3.2 MIPS) - substituting the wrong grade silently halves performance. Verify RESET and HALT are properly pulled up with 4.7 kohm resistors and that the reset pulse meets the 100 ms minimum for the on-chip PLL. Always verify the SIM chip-select timing configuration matches external memory access time, and ensure DTACK is properly terminated with a pull-up to avoid bus errors. Per the NXP Community thread 'Replacement MCU for MC68340', NXP does not recommend ColdFire as a pin-compatible drop-in - plan for software recompilation if migrating.
Thông tin tuân thủ
RoHS, REACH, lead-free, and halogen-free status are not explicitly documented in the verified web data for this NND part. The MC68340AB25E-FR predates widespread RoHS adoption; contact NXP or check lot-specific documentation for current compliance status. AEC-Q100 not applicable for legacy MPU in this product family.
