| Configuration | Universal |
| Bits (#) | 8 |
| Technology Family | FCT |
| Supply voltage (Min) (V) | 4.75 |
| Supply voltage (Max) (V) | 5.25 |
| Input type | Standard CMOS |
| Output type | 3-State |
| Clock Frequency (MHz) | 70 |
| IOL (Max) (mA) | 64 |
| IOH (Max) (mA) | -32 |
| ICC (Max) (uA) | 200 |
| Features | High speed (tpd 10-50ns), Partial power down (Ioff) |
- 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
- 64-mA Output Sink Current
- CY29FCT520ATDMB, CY29FCT520BTDMB
- 32-mA Output Sink Current
12-mA Output Source Current
- 32-mA Output Sink Current
- 3-State Outputs
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.