CY29FCT520T 8-Bit Multi-Level Pipeline Register |

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8-Bit Multi-Level Pipeline Register


Other devices and data sheet

Other device variants can also be found in the  CY29FCT520T-MIL product page

This data sheet applies to both  CY29FCT520T and  CY29FCT520T-MIL


The CY29FCT520T is a multilevel 8-bit-wide pipeline register. The device consists of four registers, A1, A2, B1, and B2, which are configured by the instruction inputs I0, I1 as a single four-level pipeline or as two two-level pipelines. The contents of any register can be read at the multiplexed output at any time by using the multiplex-selection controls (S0 and S1).

The pipeline registers are positive-edge triggered, and data is shifted by the rising edge of the clock input. Instruction I = 0 selects the four-level pipeline mode. Instruction I = 1 selects the two-level B pipeline, while I = 2 selects the two-level A pipeline. I = 3 is the hold instruction; no shifting is performed by the clock in this mode.

In the two-level operation mode, data is shifted from level 1 to level 2 and new data is loaded into level 1.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.


  • Function, Pinout, and Drive Compatible With FCT, F Logic, and AM29520
  • Reduced VOH (Typically = 3.3 V) Version of Equivalent FCT Functions
  • Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
  • Ioff Supports Partial-Power-Down Mode Operation
  • Matched Rise and Fall Times
  • Fully Compatible With TTL Input and Output Logic Levels
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • Single- and Dual-Pipeline Operation Modes
  • Multiplexed Data Inputs and Outputs
  • CY29FCT520T
    • 64-mA Output Sink Current
      32-mA Output Source Current
    • 32-mA Output Sink Current
      12-mA Output Source Current
  • 3-State Outputs


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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) 3-state output Rating Operating temperature range (C)
CY29FCT520T Order now FCT     4.75     5.25     5     70     0.2     6     64     -32     Yes     Catalog     -40 to 85