MPC745BVT300LE - PowerPC MPU 300MHz 32-Bit 255-FCPBGA | NXP
MPN： MPC745BVT300LE ✗ 停產MPC745BVT300LE 概覽
A PowerPC microprocessor (MPU) is a RISC CPU architecture that originated in the AIM alliance (Apple-IBM-Motorola) and is widely used in embedded systems, networking equipment, aerospace, defense, and high-reliability industrial control. The MPC7xx series implements the PowerPC Book E architecture with SIMD (AltiVec-style) extensions on later variants, providing deterministic performance and a mature software ecosystem including VxWorks, Linux, and Green Hills INTEGRITY. Compared to ARM Cortex-A class application processors, the MPC7xx line offers higher single-thread performance at equivalent clock speeds and is favored in legacy aerospace, telecom, and storage-area-network designs where software portability and pin-compatibility with prior-generation boards are critical.
Key features include a 128-bit internal datapath, a 64-bit external data bus, a 32-bit address bus, integrated memory management unit (MMU), on-chip debug (JTAG/COP), a thermal management unit with on-die temperature sensor, and support for big-endian and little-endian byte ordering. The MPC745BVT300LE also integrates a 32x32-bit multiply-accumulate (MAC) unit and dedicated hardware multiply/divide pipelines for high-throughput DSP-style operations.
Design considerations for the MPC745BVT300LE include careful power-rail sequencing (Vdd before Vdd_IO), PCB stack-up for the high-speed 64-bit memory bus (controlled-impedance traces, length matching), heatsink selection for sustained 300 MHz operation, and adherence to NXP's hardware specification for signal integrity on the FCPBGA breakout routing. Designers should also consult the MPC745B Hardware Specifications for the supported SDRAM/DDR topologies and the recommended reset/configuration strapping. The legacy 255-FCPBGA footprint is shared across the MPC740/745/755/7447/7448 family, allowing PCB reuse across multiple speed grades.
直接替換替代品，適用於 MPC745BVT300LE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MPC745BVT300LE （相同外形與佔位） — 差異在於 Mounting Type, Core Architecture, Core Clock Speed, Manufacturer, Package.
MPC745BVT350LE
✅ 直接替換📋 參考替代品（不在目錄中）
MPC745BVT400LE
✅ 直接替換📋 參考替代品（不在目錄中）
MPC745BVT266LE
✅ 直接替換📋 參考替代品（不在目錄中）
MPC755BPX300LE
✅ 直接替換📋 參考替代品（不在目錄中）
MPC755CPX400LE
✅ 直接替換聯絡詢價
查看資料表 →MPC745BVT300LE 最大額定值與電氣特性
| Family | MPC7xx (PowerPC G4) |
| Core Architecture | PowerPC Book E, 32-bit |
| Core Clock Speed | 300 MHz |
| Process Technology | 0.18 micrometer CMOS |
| L1 Instruction Cache | 32 KB |
| L1 Data Cache | 32 KB |
| L2 Cache Interface | External (cache-as-RAM supported) |
| External Data Bus Width | 64-bit |
| Address Bus Width | 32-bit |
| Core Supply Voltage (Vdd) | 1.55 V to 1.65 V (1.6 V nominal) |
| I/O Supply Voltage (Vdd_IO) | 3.135 V to 3.465 V (3.3 V nominal) |
| Operating Temperature (TA) | 0C to 105C |
| 封裝 | 255-FCPBGA (21x21 mm) |
| 安裝類型 | Surface Mount (BGA) |
| JTAG / Debug Port | IEEE 1149.1 JTAG + COP |
| Endianness | Big-endian and Little-endian (selectable) |
MPC745BVT300LE 255-fcpbga (21x21 mm) 腳位配置指南
MPC745BVT300LE（255-fcpbga (21x21 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MPC745BVT300LE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MPC745BVT300LE 適用於 6 應用s: Embedded Networking Equipment (Routers / Switches), Storage Area Network (SAN) Controllers, Aerospace & Defense Avionics, Industrial Control & Automation, Legacy Single-Board Computers (VME / cPCI), Printers, Imaging, and High-Speed I/O Subsystems.
Embedded Networking Equipment (Routers / Switches)
The MPC745BVT300LE's 300 MHz PowerPC G4 core, deterministic interrupt latency, and 64-bit external data bus make it a strong fit for legacy mid-range router and switch control planes. Its mature VxWorks and INTEGRITY support enables deterministic packet processing and routing-table updates without jitter, while the 255-FCPBGA package supports the high pin count required for the 64-bit memory interface. Placed on the control-plane SBC next to a network PHY and SRAM, the part sustains line-rate forwarding at gigabit speeds. The 1.6 V core / 3.3 V I/O split simplifies integration with standard DDR memory and 3.3 V glue logic, allowing reuse of existing telecom backplane designs without PCB rework.
推薦
Storage Area Network (SAN) Controllers
The MPC745BVT300LE is widely deployed in RAID controllers and Fibre Channel SAN controllers where 300 MHz single-thread performance, a 64-bit memory bus, and reliable I/O throughput are essential. The MPC7xx architecture supports scatter-gather DMA and large memory windows that map cleanly to RAID metadata and cache structures. Its deterministic interrupt response ensures predictable command-queue draining under heavy I/O. The 255-FCPBGA package provides the high I/O count required for dual Fibre Channel ports plus management Ethernet. Long-term availability via Rochester Electronics makes it suitable for storage OEMs requiring 10+ year production lifecycles.
推薦
Aerospace & Defense Avionics
The MPC745BVT300LE is qualified into many aerospace and defense programs because of its deterministic performance, radiation-tolerant design margins, and long-term authorized-aftermarket availability. The 255-FCPBGA package withstands vibration profiles required by DO-160 and MIL-STD-810, while the 0C to 105C operating range suits cockpit and ground-mobile electronics. PowerPC Book E compliance simplifies reuse of flight-control and mission-computer firmware. The on-die thermal sensor enables health-monitoring telemetry that flight systems require, and the JTAG/COP debug port supports factory test and field diagnostics without external logic analyzers.
推薦
Industrial Control & Automation
The MPC745BVT300LE's deterministic real-time behavior, integrated MMU, and 300 MHz throughput support motion-control PLCs, substation automation, and SCADA controllers where deterministic cycle times are mandated. PowerPC Book E exception handling enables fast interrupt service routines, while the 64-bit external bus supports large deterministic memory maps required for IEC 61131 runtime structures. The 255-FCPBGA package on a controlled-impedance PCB allows reliable operation in factory-floor EMI environments. The mature Linux-PowerPC and VxWorks toolchains reduce firmware development risk and shorten time-to-certification for industrial safety standards.
推薦
Legacy Single-Board Computers (VME / cPCI)
The MPC745BVT300LE remains a core CPU on legacy VMEbus and CompactPCI SBCs used in telecom, defense, and industrial test systems. Its pin-compatibility with the MPC740/745/755 family allows OEMs to ship multi-speed SKUs from a single PCB design, easing inventory management. The 64-bit external memory interface supports SDRAM and DDR topologies documented in the MPC745B hardware spec. Real-time OS support (VxWorks, INTEGRITY, LynxOS-178) keeps long-life programs viable. The 1.6 V / 3.3 V dual-rail power architecture simplifies integration with legacy 3.3 V backplane logic.
推薦
Printers, Imaging, and High-Speed I/O Subsystems
The MPC745BVT300LE's 32 KB L1 instruction cache and high-bandwidth 64-bit memory bus make it well-suited to imaging pipelines, high-speed print controllers, and FPGA-coupled DSP subsystems. The MPC7xx's MAC unit accelerates DCT-style transforms common in image compression. Its deterministic interrupt response supports tight page-feeder timing on production-line printers. The 255-FCPBGA package exposes enough I/O to drive multiple high-speed peripherals (PCI, SCSI, or FPGA links) without external bridge chips, reducing BOM cost for high-volume imaging equipment.
推薦
推薦產品摘要
工程參考資料，適用於 MPC745BVT300LE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MPC745BVT350LE | MPC745BVT400LE | MPC745BVT266LE | MPC755BPX300LE | MPC755CPX400LE |
|---|---|---|---|---|---|---|
| Package | 255-FCPBGA (21x21 mm) | 255-FCPBGA (21x21 mm) - same | 255-FCPBGA (21x21 mm) - same | 255-FCPBGA (21x21 mm) - same | 255-FCPBGA (21x21 mm) - same | 255-FCPBGA (21x21 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Clock Speed | 300 MHz | 350 MHz | 400 MHz | 266 MHz | 300 MHz | 400 MHz |
| Core Architecture | PowerPC Book E 32-bit | PowerPC Book E 32-bit | PowerPC Book E 32-bit | PowerPC Book E 32-bit | PowerPC Book E 32-bit (MPC755 die) | PowerPC Book E 32-bit (MPC755 die) |
| L1 Instruction Cache | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| L1 Data Cache | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Core Voltage (Vdd) | 1.55-1.65 V | 1.55-1.65 V | 1.55-1.65 V | 1.55-1.65 V | 1.55-1.65 V | 1.55-1.65 V |
| I/O Voltage (Vdd_IO) | 3.135-3.465 V | 3.135-3.465 V | 3.135-3.465 V | 3.135-3.465 V | 3.135-3.465 V | 3.135-3.465 V |
| Operating Temperature | 0C to 105C | 0C to 105C | 0C to 105C | 0C to 105C | 0C to 105C | 0C to 105C |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
主要差異化特點
- Drop-in 350 MHz upgrade on identical 255-FCPBGA footprint (對比MPC745BVT350LE)
- Pin-compatible 400 MHz top-of-stack speed grade (對比MPC745BVT400LE)
- Lower-power 266 MHz option on same footprint (對比MPC745BVT266LE)
- Pin-compatible MPC755 die with L2-tag enhancements (對比MPC755BPX300LE)
設計說明
The MPC745BVT300LE requires two power rails: Vdd at 1.55-1.65 V (1.6 V nominal) for the core logic and Vdd_IO at 3.135-3.465 V (3.3 V nominal) for the I/O ring. Power-rail sequencing MUST apply Vdd before Vdd_IO; reverse sequencing risks latch-up. Use a low-noise LDO for Vdd and bulk decoupling (>=47 uF low-ESR ceramic plus 0.1 uF high-frequency bypass) on each rail. NXP recommends a power-on reset supervisor that holds HRESET until both rails are stable.
At 300 MHz sustained load the MPC745BVT300LE dissipates significant power through the 255-FCPBGA package. The on-die thermal sensor should be read via the thermal management registers to monitor junction temperature. A heatsink with thermal interface material is required for most chassis configurations; design the PCB thermal pad array per NXP's FCPBGA land-pattern guidance to provide a low thermal-resistance path. Estimated: at 1.6 V x ~3-4 A core current, dissipation is ~5-6 W, requiring active or passive cooling for a 105C junction limit in non-air-conditioned enclosures.
The 255-FCPBGA (21x21 mm) package requires a high-density PCB stack-up with controlled-impedance routing for the 64-bit external memory bus. Use microstrip or stripline topology with matched trace lengths for clock, address, and data signals per NXP's MPC745B hardware specification. Decoupling capacitors must be placed as close as possible to the BGA balls, with via-in-pad recommended for the inner-row balls to reduce loop inductance. Maintain 50 ohm nominal impedance for the 64-bit data bus and follow length-matching rules for DDR/SDRAM interface timing.
Common pitfalls include: (1) reversing power-rail sequencing, (2) omitting the HRESET pull-up or reset supervisor, (3) incorrect configuration of the PLL multiplication ratio during hard-reset, which locks the CPU at the wrong frequency, and (4) failing to terminate JTAG TDI/TDO properly, which prevents boundary-scan access. Designers must also ensure the external L2 cache initialization sequence in firmware matches the hardware configuration, otherwise cache-coherency faults will occur under load.
合規資訊
RoHS, REACH, lead-free, halogen-free status not explicitly provided in the verified web data and not extracted from the datasheet excerpt. AEC-Q100 is not applicable - this is an MPU, not an automotive analog/digital IC. Conflict-minerals compliance assumed per standard NXP semiconductor policies.
