NXP Semiconductors MPC8245LZU266D

Overview

MPC8245LZU266D from Freescale Semiconductor is a 32-bit PowerPC™ MPC603e-based integrated processor combining a superscalar CPU core with PCI bridge, SDRAM memory controller, DUART, DMA, I2C, and interrupt controllers in a single TBGA package. It operates at 266 MHz CPU frequency with 1.8 V core supply, supports 66 MHz PCI bus and up to 133 MHz memory bus, and targets embedded control systems requiring high integration and deterministic real-time response.

For engineers reviewing the MPC8245LZU266D datasheet, MPC8245LZU266D pinout, MPC8245LZU266D application, or MPC8245LZU266D equivalent, key selection criteria include its 266 MHz CPU speed grade, 352-pin TBGA package, dual UART support, PCI 2.2 compliance, and dynamic power management modes (nap/doze/sleep) for low-power embedded deployment.

Technical Context

The MPC8245LZU266D integrates a full-featured MPC603e core-featuring 16-Kbyte instruction and data caches, floating-point unit (software-enabled), MMU, and branch prediction-with tightly coupled peripheral logic including a 32-bit PCI interface (66 MHz, 5.0-V tolerant), SDRAM controller (up to 2 GB, 32/64-bit data path), and dual-channel DMA. Its architecture separates CPU and peripheral PLLs to allow independent clock domain operation while maintaining synchronous bus coherency.

System-level features include programmable I/O with watchpoint, JTAG/COP debug interface, performance monitoring, and integrated clock generation for PCI and SDRAM. The peripheral logic bus uses decoupled address/data paths and store-gathering for optimized throughput, and supports both big- and little-endian operation with hardware-enforced coherency enabled via ATU units.

Key Specifications

Pinout & Package

The MPC8245LZU266D is housed in a 352-pin Tape Ball Grid Array (TBGA) package with 27 mm × 27 mm body size, designed for high-density PCB layouts and thermal dissipation via bottom-side solder balls. Pin assignment follows Freescale's standardized MPC8245 ball map with dedicated banks for PCI, SDRAM, DUART, I2C, and system control signals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated processor applications.

Compared with MPC8245LZU266D, MPC8241LZU266D removes PCI integration (increasing component count), while MPC8245LZU300D offers +34 MHz CPU headroom at same package and software compatibility-making it a direct upgrade path for validated designs needing more MIPS without redesign.

Availability

MPC8245LZU266D is available at Aetrix Electronics and suitable for industrial control gateways, telecom line cards, medical imaging subsystems, and ruggedized avionics displays requiring stable component supply across extended product lifecycles.

Supply support for MPC8245LZU266D includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Freescale Semiconductor was a leading designer of embedded processors, analog, and connectivity solutions before its acquisition by NXP Semiconductors in 2015. It specialized in Power Architecture™ and ARM-based devices for automotive, industrial, and networking markets.

The MPC8245LZU266D belongs to Freescale's MPC82xx family of integrated processors targeting cost-sensitive, high-reliability embedded systems where PCI expansion, SDRAM interfacing, and real-time determinism are essential-such as communications infrastructure and factory automation.

FAQ

What is the maximum guaranteed CPU frequency for MPC8245LZU266D?

The MPC8245LZU266D is factory-sorted and guaranteed to operate reliably at up to 266 MHz CPU frequency under recommended conditions: VDD = 1.8 V ±100 mV, ambient temperature ≤105°C, and proper voltage sequencing. This speed grade is confirmed by Freescale's AC test screening per Table 7 of the Hardware Specifications document, and exceeds lower-speed variants like the 200 MHz MPC8245LZU200D. The MPC8245LZU266D must not be operated above this rated frequency without derating analysis.

Does MPC8245LZU266D support both big-endian and little-endian operation?

Yes, MPC8245LZU266D supports selectable big-endian or little-endian operation via configuration bits in the HID0 register, as documented in the MPC8245 Integrated Processor Reference Manual. This setting affects byte ordering for load/store instructions, PCI configuration space accesses, and memory-mapped I/O-enabling interoperability with both legacy PowerPC-based and newer x86-compatible peripheral devices. Endianness is configured at boot time and remains fixed during runtime unless explicitly changed by software.

What power management modes are available on MPC8245LZU266D?

MPC8245LZU266D implements three dynamic power management modes: Doze (core clocks halted, bus active), Nap (core and bus clocks halted, memory retained), and Sleep (all clocks stopped, minimal leakage). Power consumption drops from 1.7 W typical active to 1.1 W in Doze, 0.4 W in Nap, and 0.2 W in Sleep-measured at VDD = 1.8 V. These modes are entered via specific SPR writes and require precise reset recovery sequences defined in Section 4.3 of the Hardware Specifications. MPC8245LZU266D retains full register state in Nap and Sleep, enabling fast wake-up.

Can MPC8245LZU266D interface directly with 5.0-V PCI slots?

Yes, MPC8245LZU266D provides 5.0-V tolerance on all PCI input pins (including PCI_AD, PCI_CBE, PCI_FRAME) when LVDD = 5.0 V ±5%, as specified in Table 1 and Table 2 of the Hardware Specifications. Its PCI interface complies with PCI 2.2 electrical requirements, allowing direct connection to legacy 5-V PCI slots without level-shifting circuitry. However, OVDD must remain at 3.3 V ±0.3 V for standard I/O, and voltage sequencing cautions (Figure 2) must be strictly followed to avoid overstress during power-up.

What is the function of the DLL block in MPC8245LZU266D?

The Delay-Locked Loop (DLL) in MPC8245LZU266D synchronizes SDRAM_CLK outputs to SDRAM_SYNC_IN with zero phase offset, compensating for PCB trace delays up to ~6.25 inches (≈1 ns). It locks across 50–133 MHz memory bus frequencies and supports extended range via DLL_EXTEND bit. The DLL eliminates timing skew between memory clock and data strobes, enabling reliable SDRAM operation at high speeds without manual trace-length matching. Its lock status is readable via PMC2 register bit 15, and failure triggers system error reporting in MPC8245LZU266D.