3A501Electronic items as follows:

a. General purpose integrated circuits, as follows:
15. Complementary Metal Oxide Semiconductor (CMOS) integrated circuits, not specified by 3A001.a.2., designed to operate at an ambient temperature equal to or less (better) than 4,5 K (-268,65 °C).
Technical Note:
For the purposes of 3A501.a.15., CMOS integrated circuits are also referred to as cryogenic CMOS or cryoCMOS integrated circuits.
16. Integrated circuits having one or more digital processing units having a 'Total Processing Performance' ('TPP') of 6 000 or more.
N.B. For “digital computers” and “electronic assemblies” containing integrated circuits specified by 3A501.a.16., see 4A507.
Technical Notes:
For the purposes of 3A501.a.16.:
1. 'Total Processing Performance' ('TPP') is 2 × 'MacTOPS' × 'bit length of the operation', aggregated over all processing units on the integrated circuit.
a. 'MacTOPS' is the theoretical peak number of Tera (1012) operations per second for multiply-accumulate computation (D=AxB+C).
b. The 2 in the 'TPP' formula is based on industry convention of counting one multiply-accumulate computation, D=AxB+C, as 2 operations for purpose of datasheets. Therefore, 2 × MacTOPS may correspond to the reported TOPS or FLOPS on a datasheet.
c. 'Bit length of the operation' for a multiply-accumulate computation is the largest bit-length of the inputs to the multiply operation.
d. Aggregate the 'TPPs' for each processing unit on the integrated circuit to arrive at a total. 'TPP' = TPP1 + TPP2 + .... + TPPn (where n is the number of processing units on the integrated circuit).
2. The rate of 'MacTOPS' is to be calculated at its maximum value theoretically possible. The rate of 'MacTOPS' is assumed to be the highest value the manufacturer claims in a manual or brochure for the integrated circuit. For example, the 'TPP' threshold of 6 000 can be met with 750 tera integer operations (or 2 × 375 ‘MacTOPS’) at 8 bits or 300 tera FLOPS (or 2 × 150 'MacTOPS') at 16 bits. If the IC is designed for MAC computation with multiple bit lengths that achieve different 'TPP' values, the highest 'TPP' value should be evaluated against parameters in 3A501.a.16.
3. For integrated circuits, specified by 3A501.a.16., that provide processing of both sparse and dense matrices, the 'TPP' values are the values for processing of dense matrices (e.g., without sparsity).
b
Microwave or millimetre wave items as follows:
13. Parametric signal amplifiers having all of the following:
a. Designed for operation at an ambient temperature below 1 K (-272,15 °C);
b. Designed for operation at any frequency from 2 GHz up to and including 15 GHz; and
c. A noise figure less (better) than 0,015 dB at any frequency from 2 GHz up to and including 15 GHz at 1 K (-272,15 °C).
Note:
Parametric signal amplifiers include Travelling Wave Parametric Amplifiers (TWPAs).
Technical Note:
For the purposes of 3A501.b.13., parametric signal amplifiers may also be referred to as Quantum-limited amplifiers (QLAs).