CY29947AXI

Clock Buffers, Drivers Overview

The CY29947AXI is a low-voltage clock distribution buffer supporting frequencies up to 200 MHz. It operates on a single power supply ranging from 2.375 V to 3.63 V, compatible with both 2.5 V and 3.3 V logic levels. The device features two LVCMOS/LVTTL-compatible inputs and nine outputs, providing a 1:9 fanout ratio that can effectively drive up to 18 transmission lines in series-terminated configurations. Key electrical specifications include a maximum output-to-output skew of 250 ps and propagation delays between 4.75 ns and 10.50 ns depending on voltage. It is housed in a 32-pin TQFP package designed for industrial temperature ranges.

Clock Buffers, Drivers Feature Summary

• Dual input selection capability allowing switching between primary system clocks and test clocks via the TCLK_SEL pin.
• Synchronous Output Enable (SYNC_OE) input eliminates potential output glitching or runt pulse generation by synchronizing control signals to the input clock edge.
• Low output-to-output skew of 250 ps maximum, suitable for nested clock trees in demanding synchronous systems.
• Three-state control via TS# pin allows high-impedance output disabling.

Clock Buffers, Drivers Applications

• Nested clock tree distribution in synchronous digital systems.
• Primary system clock routing combined with test clock injection.
• Driving 50 Ω series or parallel terminated transmission lines.

Clock Buffers, Drivers Procurement Notes

Verify component authenticity through authorized Infineon distributors. Confirm RoHS compliance status as required by local regulations. Check current lifecycle status, as availability may vary. Ensure proper ESD handling procedures are followed during storage and assembly due to moisture sensitivity classification.

Clock Buffers, Drivers Selection Notes

Select this component when a 1:9 fanout buffer with dual-input mux functionality is required. Ensure the design supports the 2.375 V to 3.63 V supply range. Verify that the 250 ps skew specification meets the timing requirements of the target synchronous system. Consider the 32-TQFP package dimensions for PCB layout constraints.

Clock Buffers, Drivers Part Context

This part belongs to the CY29947 family of clock buffers. The 'AXI' suffix indicates the Industrial temperature grade (-40°C to +85°C) and the 32-pin TQFP package. It is functionally similar to legacy parts like the MPC947 and MPC9447, offering pin compatibility for direct replacements in existing designs.

Clock Buffers, Drivers Replacement Considerations

The datasheet explicitly states pin compatibility with MPC947 and MPC9447. These devices can be considered for drop-in replacements if their specific electrical parameters meet the application requirements.