Regarding the definition of supported data rates for Board to Board Connectors​

Determined from the S parameter at differential 100Ω, the lowest value among the following is the recommended transmission speed/Data Rate

Connectors in signal integrity

Connectors, which are passive products, are components that provide the function of "connection" by receiving part of the transmission margin in the concept of "signal integrity". Except for cases where the "share" of each part is determined by standards, the characteristics required will vary strictly depending on the construction of the customer's system. Ultimately, the product will be adopted after simulation using a characteristic model and verification using detailed data, and evaluation of the actual product. In other words, except for standard products, the expression "**Gbps compatible connector" is not necessarily accurate. On the other hand, we understand that information such as "compatible data rate" is very advantageous, even if it is only as a guideline, at the initial consideration stage of the introduction stage. Therefore, IRISO has defined "compatible data rate" as a reference value that we recommend based on our experience supporting customers and our track record of evaluating and designing high-frequency products, and has begun to assign it to each product group. In this regard, we keep the following points in mind.

• Clarify and disclose the definition and reasons for fairness
• The idea and "value" must be reasonable for actual use
• It is easy for the customer to attach the hit when incorporating it into their own system

Differential 100Ω/S-parameter based definition

The data rate definition was performed with the most requested differential 100Ω, and was defined based on the mixed-mode S-parameters, which are the most popular parameters for passive components for high-speed transmission. In addition, because it depends on the customer's usage environment, crosstalk is not taken into account, and a single lane is defined. To avoid complication, the definition is based only on differential transmission and reflection characteristics. As a general rule, we use products that are mounted on our own printed circuit board, including soldered parts to the circuit board.

(For crosstalk and common mode conversion, we also provide individual data and conduct evaluations, so please contact us.)

Pass-through characteristics: Sdd12/21

The pass characteristics required for transmission lines are actually various due to processing such as emphasis and equalizing, and there are various discussions on harmonics (transmission margin vs. noise source, etc.). Therefore, our definition is easy to understand, and based on the basics, in NRZ transmission, it is -3 dB or less at the Nyquist frequency (Data Rate/2), which is the main frequency, and has sufficient linearity.

Reflective properties: Sdd11/22

Reflection properties must be considered in terms of "noise generation" as well as signal transmission. Therefore, according to our company's regulations, in addition to not exceeding -15 dB at the Nyquist frequency, it is up to 1.5 times the Nyquist frequency (75% of Data Rate = right figure), which is calculated to cover the main spectrum in NRZ random transmission. -10dB = electric power, and it is stipulated that it should not exceed 10%.

This is a stricter regulation than recent transmission standards, such as PCIe CEM after Gen3.

Data rate supported by the product

The recommended supported data rate is the case that satisfies both the transmission and reflection characteristics described above, that is, the "severest" data rate required by each. As a matter of fact, most Board to Board Connectors have stricter reflection characteristics and transmission characteristics that are far superior (low loss) to the recommended data rate standards shown.

In addition, if there is compliance with various standards (ex. PCIe GEN3.0), it may be listed together, and there may be a gap with the recommended data rate. Even if the recommended data rate in our standard is lower than the standard transmission speed, it can be used because it satisfies the required performance.

High-speed transmission quick reference

Stack 0.40mm Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
12.1Gbps	2.00mm	11010B	11010S
11.8Gbps	3.00mm	10126B	11007S
8.7Gbps	3.50mm	10126B	11007S
8.1Gbps	3.00mm	10126B	10126S
8.0Gbps	4.00mm	10126B	11007S
7.0Gbps	3.50mm	10126B	10126S
6.5Gbps	4.00mm	10126B	10126S
4.3Gbps	4.50mm	11001B	11001S

Stack 0.50mm Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
5.9Gbps	15.00mm	9984B	10121S
5.5Gbps	16.00mm	10103B	10103S
5.5Gbps	19.00mm	10103B	10103S
5.5Gbps	25.00mm	10103B	10103S
880Mbps	12.00mm	9984B	9984S
760Mbps	30.00mm	10106B	10106S

Stack 0.635 Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
another paper	another paper	10109B	10109S

Stack 0.80 Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
5.0Gbps	9.00mm	9827B	9827S
1.7Gbps	18.00 mm	9860B	9828S
1.5Gbps	16.55mm	9860B	9827S
900Mbps	24.70mm	9860B	9828S

Stack 2.00 Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
1.3Gbps	18.00 mm	10120B	10120S

Right Angle 0.50 Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
7.8Gbps	Top Row	10112B	10112S
6.6Gbps	Bottom Row	10112B	10112S

Right Angle 0.635 Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
6.0Gbps	Bottom Row	10110B-A,B	10109S-C,D
5.8Gbps	Top Row	10110B-A,B	10109S-C,D
4.1Gbps	Top Row	10104B	10104S
3.7Gbps	Bottom Row	10104B	10104S

Right Angle 0.80 Pitch

Supported data rate Applicable Data Rate	Stack Height	plug	Socket
5.4Gbps	Bottom Row	9828B	9828S
5.4Gbps	Top Row	9828B	9828S