TLF Abbreviation

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Popular abbreviations of TLF:

Searching for TLF abbreviation / TLF full form leads to different results in different categories. The below table illustrates the popular acronyms among them.

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What does TLF mean?

TLF is the acronym that stands for the Timing Library Format which represents the power and timing parameters of a cell. It is a kind of input file, an ASCII representation that finds out the power and timing parameters of Static Timing Analysis(STA) Engines regarding semiconductor technology. It is often schematically written as (.lib) in computer languages.

TLF File Structure – TLF file of a cell describes to major scope i.e. library scope and cell scope.

The library scope contains information on technology, a global model of timing, current data, and properties defining net resistance and capacitance.

Cell scope contains characteristics of every path and pin information of the pins in that cell.

Structure of TLF

1. Header – It is at the beginning of any TLF file. Information on the general library is given in a keyword form.
2. Library Models – It contains general wire capacitance and resistance data for pre-layout interconnect estimation of a cell. 
3. Properties – Process scaling factor, voltage scaling factor, and temperature scaling factor of PVT derating data are described here. 
4. Cell Information – It contains the name of the cell; name, timing properties of a pin; delay, and energy fluence of a given path in keyword format.
5. Pin Information – It describes the name, and characteristics of the pin in keyword format.
6. Latch or Register Information – It describes the sequential logic behavior of the cell.
7. Path Information– Transition, power, delay of a path and pin to pin path is described in the path information part in keyword format.
8. Timing Checks– This is mostly used in the sequential cell.

A TLF file contains timing models and data that help to calculate –

• I/O path delays
• timing check values 
• interconnect delays of a cell

FAQs

1. What are the three major parts of TLF?

Ans. Global Definition, Cell Definition, and Pin Definition.

2. What are CCS and NLDM?

Ans. CCS technique and NDLM technique are sources that derive TLF file parameters.