MPC9456AC

Clock Buffers, Drivers Overview

The MPC9456AC is a 2.5V and 3.3V compatible 1:10 clock distribution buffer designed for low-voltage mid-range to high-performance telecom, networking, and computing applications. It features a differential LVPECL clock input and ten configurable LVCMOS outputs organized into three banks. The device supports mixed voltage supplies, allowing individual bank operation at 2.5V or 3.3V. It provides selectable output configurations with 1:1 and 1:2 frequency division ratios per bank. The component operates within an ambient temperature range of –40°C to 85°C and is packaged in a 32-lead LQFP.

Clock Buffers, Drivers Feature Summary

• Configurable 10 LVCMOS outputs across three independent banks supporting mixed 2.5V/3.3V supply voltages
• Differential LVPECL clock input with selectable 1:1 or 1:2 frequency division per output bank
• Maximum output skew of 200 ps (150 ps within one bank) and support for frequencies up to 250 MHz
• Tristable outputs controlled by MR/OE pin, capable of driving parallel or series terminated transmission lines

Clock Buffers, Drivers Applications

• Mid-range to high-performance telecom systems
• Networking equipment requiring precise clock distribution
• Computing applications utilizing mixed-voltage logic levels

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type and lead finish. The 'AC' designation typically indicates the commercial temperature grade (-40 to 85°C). Ensure compatibility with existing board layouts for the 32-lead LQFP package. Cross-reference the datasheet revision date with current production status to confirm availability and lifecycle stage.

Clock Buffers, Drivers Selection Notes

Select this component when a differential LVPECL input must be distributed to multiple LVCMOS loads operating at different voltage levels. The device allows independent voltage selection for each output bank, facilitating mixed-voltage system designs. Consider the maximum output skew specifications if tight synchronization between output banks is required. Verify that the application can accommodate the required termination resistors for the chosen transmission line configuration.

Clock Buffers, Drivers Part Context

The MPC9456 is part of the Motorola/Freescale timing solutions portfolio, specifically designed as a clock fanout buffer. It serves as a bridge between high-speed differential clock sources and lower-voltage digital logic. The device complements other clock generators and buffers by providing robust signal distribution capabilities with minimal skew in complex multi-board systems.

Clock Buffers, Drivers Replacement Considerations

The MPC9446 is documented as a CMOS-compatible alternative within the same product family. Verify pinout compatibility and electrical specifications before substitution. Other manufacturers may offer similar LVPECL-to-LVCMOS buffers, but functional equivalence requires careful comparison of skew, drive strength, and supply voltage ranges.