CY29942 1:18 Clock Distribution Buffer 1:18 Clock Distribution Buffer Features Functional Description Operational range: Up to 200 MHz The CY29942 is a low voltage clock distribution buffer with an LVCMOS or LVTTL compatible clock input. The output enable LVCMOS/LVTTL clock input control input is LVCMOS/LVTTL compatible. The eighteen outputs are 2.5 V or 3.3 V LVCMOS or LVTTL compatible, LVCMOS-/LVTTL-compatible logic input operate up to 200 MHz, and can drive 50 series or parallel 18 clock outputs: Drive up to 36 clock lines terminated transmission lines. For series terminated transmission lines, each output can drive one or two traces, Output-to-output Skew: 110 ps (typical) giving the devices an effective fanout of 1:36. Low Output enable control output-to-output skews make the CY29942 an ideal clock distribution buffer for nested clock trees in the most demanding Supply voltage: 2.5 V or 3.3 V of synchronous systems. Temperature range: Commercial and Industrial For a complete list of related documentation, click here. 32-pin TQFP package Pin compatible with MPC942C Logic Block Diagram VDD 18 TCLK Q0-Q17 OE Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 38-07284 Rev. *L Revised November 21, 2017CY29942 Pin Configuration Figure 1. 32-pin TQFP pinout VSS 1 24 Q6 VSS 2 23 Q7 TCLK 3 22 Q8 NC 4 21 VDD CY29942 OE 5 20 Q9 NC 6 19 Q10 VDD 7 18 Q11 VDD 8 17 VSS Pin Descriptions Pin Name I/O Description 3 TCLK Input External reference/Test clock input. Weak internal pull-down resistor. 5 OE Input Output enable. When HIGH, all outputs are enabled. When set LOW, the outputs are at high impedance. Weak internal pull-up resistor. 9, 10, 11, 13, Q(17:0) Output Clock outputs 14, 15, 18, 19, 20, 22, 23, 24, 26, 27, 28, 30, 31, 32 7, 8, 16, 21, VDD 2.5 V or 3.3 V power supply 29 1, 2, 12, 17, VSS Ground 25 4, 6 NC No connection Document Number: 38-07284 Rev. *L Page 2 of 10 Q17 9 32 Q0 Q16 10 31 Q1 Q15 11 30 Q2 VSS 12 29 VDD Q14 13 28 Q3 Q13 14 27 Q4 Q12 15 26 Q5 VDD 16 25 VSS