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Part Number: CY29FCT818T
Description: The FCT818T contains a high-speed 8-bit general-purpose data pipeline register and a high-speed 8-bit shadow register. ...
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CY29FCT818T
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DataSheet
General Description
CY29FCT818T General Description
The FCT818T contains a high-speed 8-bit general-purpose data pipeline register and a high-speed 8-bit shadow register. The general-purpose register can be used in an 8-bit wide data path for a normal system application. The shadow register is designed for applications, such as diagnostics in sequential circuits, where it is desirable to load known data at a specific location in the circuit and to read the data at that location.
The shadow registers can load data from the output of the FCT818T, and can be used as a right-shift register with bit-serial input SDI and output SDO, using DCLK. The data register input is multiplexed to enable loading from the shadow register or from the data input pins using PCLK. Note that data can be loaded simultaneously from the shadow register to the pipeline register, and from the pipeline register to the shadow register provided set-up and hold time requirements are satisfied with respect to the two independent clock inputs.
In a typical application, the general-purpose register in the FCT818T replaces an 8-bit data register in the normal data path of a system. The shadow register is placed in an auxiliary bit-serial loop which is used for diagnostics. During diagnostic operation, data is shifted serially into the shadow register, then transferred to the general purpose register to load a known value into the data path. To read the contents at that point in the data path, the data is transferred from the data register into the shadow register, then shifted serially in the auxiliary diagnostic loop to make it accessible to the diagnostics controller. This data is then compared with the expected value to diagnose faulty operation of the sequential circuit.
The outputs are designed with a power-off disable feature to allow for live insertion of boards.
CY29FCT818T Maximum Ratings
(Abovewhichtheusefullifemaybeimpaired.Foruser guidelines, not tested.)
Storage Temperature....................................-65 to +150
Ambient Temperature with
Power Applied................................................-65 to +135
Supply Voltage to Ground Potential.................-0.5V to +7.0V
DC Input Voltage.............................................-0.5V to +7.0V
DC Output Voltage...........................................-0.5V to +7.0V
DC Output Current (Maximum Sink Current/Pin)...........120 mA
Storage Temperature....................................-65 to +150
Ambient Temperature with
Power Applied................................................-65 to +135
Supply Voltage to Ground Potential.................-0.5V to +7.0V
DC Input Voltage.............................................-0.5V to +7.0V
DC Output Voltage...........................................-0.5V to +7.0V
DC Output Current (Maximum Sink Current/Pin)...........120 mA
CY29FCT818T Features
Function,pinoutanddrivecompatiblewithFCT,FLogic and AM29818
FCT-C speed at 6.0 ns max. (Com 'l) FCT-A speed at 12.0 ns max. (Mil)
Reduced V (typically = 3.3V) versions of equivalent OH FCT functions
Edge-rate control circuitry for signi?cantly improved noise characteristics
Power-off disable feature
Matched rise and fall times
FullycompatiblewithTTLinputandoutputlogiclevels
Sink current 64 mA (Com 'l)
20 mA (Mil)
Source current 32 mA (Com 'l)
3 mA (Mil)
8-Bit pipeline and shadow register
ESD > 2000V
FCT-C speed at 6.0 ns max. (Com 'l) FCT-A speed at 12.0 ns max. (Mil)
Reduced V (typically = 3.3V) versions of equivalent OH FCT functions
Edge-rate control circuitry for signi?cantly improved noise characteristics
Power-off disable feature
Matched rise and fall times
FullycompatiblewithTTLinputandoutputlogiclevels
Sink current 64 mA (Com 'l)
20 mA (Mil)
Source current 32 mA (Com 'l)
3 mA (Mil)
8-Bit pipeline and shadow register
ESD > 2000V
CY29FCT818T Connection Diagram
CY29FCT818T
PDF/DataSheet Download
- Datasheet: CY29FCT818T
- File Size: 95250 KB
- Manufacturer: TI [Texas Instruments]
- Click here to Download
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