How should I select a bus switch?

Firstly, please select a general-purpose bus switch or a high-speed bus switch according to the communication speed and communication standard of the signal you want to switch. For general-purpose bus switches, you can select the appropriate series based on power supply voltage, circuit configuration (SPST, SPDT, SP4T, etc.), and number of circuits (number of channels). In the case of high-speed bus switches, the appropriate series can be selected based on communication speed, circuit configuration, and number of circuits (number of channels).

The selection steps are explained in (1) to (3).

(1) Based on Table-1, select a general-purpose bus switch or a high-speed bus switch according to the communication speed and communication standard of the signal you want to switch.

Table-1 Categories of Bus switches
Major Category Data Rate Bus Standard Example
General purpose
Bus Switches		 200 Mbps －
200 Mbps
(Depends on usage environment)		 I2C
High Speed
Bus Switches		 480 Mbps USB 2.0
2.5 Gbps PCIeTM Gen. 1.1
3 Gbps SATA 2.0
3 Gbps SAS 1.0
3.4 Gbs HDMI 1.4
5 Gbps USB 3.0
5 Gbps PCIeTM Gen. 2.0
5.4 Gbps

DisplayportTM 1.2
6 Gbps SATA 3.0
6 Gbps SAS 2.0
8 Gbps PCIeTM Gen.3.0
10 Gbps USB 3.1

(2)  In case of general purpose bus switches
First, select a single power supply (low voltage, 5 V system) or a dual power supply level shift type for voltage conversion (level shift).
After that, you can select the bus switch that suits your application by selecting the switch configuration (SPST, SPDT, etc.), supply voltage, and number of bits.

Table-2 How to select general purpose bus switch
Category VCC (V) Circuit
Configuration		 Number of Circuits（Channels） Series
Low Voltage 1.65～3.6 SPST 1 TC7SBL Series
2 TC7WBL Series
4 TC7MBL Series
SPDT 4 TC7MBL Series
SP4T 2 TC7MBL Series
5 V 1.65～5.5 SPST 1 TC7SB Series
2 TC7WB Series
SPDT 1 TC7SB Series
Dual Supply
level shifting

VCCA
1.65～5.0

 VCCB
2.3～5.5		 SPST 1 TC7SPB Series
2 TC7WPB Series
4 TC7QPB Series
8 TC7MPB Series
SPDT 2 TC7MPB Series

(3)  How to select High speed bus switch
You can select a bus switch suitable for your application based on communication speed, communication standard, circuit configuration, and number of circuits.
SPDTs that switch signals are mainly used.

Table-3 How to select high speed bus switch
Data Rate Bus Standard Example Circuit
Configuration		 Number of
Circuits		 Product Series
480 Mbps USB 2.0 SPDT 2 TC7USB Series
2.5 Gbps PCIeTM Gen. 1.1
3 Gbps SATA 2.0
3 Gbps SAS 1.0
3.4 Gbs HDMI 1.4
5 Gbps USB 3.0 SPDT 2 TC7PCI Series
5 Gbps PCIeTM Gen. 2.0
5.4 Gbps

DisplayportTM 1.2
6 Gbps SATA 3.0
6 Gbps SAS 2.0
8 Gbps PCIeTM Gen.3.0
10 Gbps USB 3.1

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