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Product Detailed Parameters
- Description：IC SW DPST, SPDTX2 8.4OHM 20VQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Switch Circuit：DPST, SPDT
- Multiplexer/Demultiplexer Circuit：1:2, 2:1
- On-State Resistance (Max)：8.4Ohm
- Channel-to-Channel Matching (ΔRon)：500mOhm
- Voltage - Supply, Single (V+)：1.71V ~ 1.98V, 3V ~ 3.6V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：100ns, 100ns
- -3db Bandwidth：13GHz
- Charge Injection：-
- Channel Capacitance (CS(off), CD(off))：-
- Current - Leakage (IS(off)) (Max)：5µA
- Crosstalk：-27dB @ 10GHz
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-VFQFN Exposed Pad
- Supplier Device Package：20-VQFN (4.5x2.5)
- Number of Circuits：2
- Grade：-
- Qualification：-
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Overview
The TMUXHS4212RKST is a two-channel differential multiplexer or demultiplexer switch manufactured by Texas Instruments. It supports data rates up to 16 Gbps and features a -3-dB differential bandwidth of 13 GHz. The device operates on a single supply voltage (VCC) of either 1.8 V or 3.3 V, with active current consumption of 180 μA and standby current below 2 μA. It accommodates common mode voltages from 0 V to 1.8 V and differential amplitudes up to 1800 mVpp. The component is housed in a 20-pin VQFN package measuring 2.5 mm × 4.5 mm.
Feature Summary
- Adaptive common mode voltage tracking ensures signal integrity across the supported voltage range.
- Ultra-low power consumption with distinct active and standby modes controlled by the OEn pin.
- Optimized silicon design for minimal intra-pair skew and excellent high-frequency response.
Applications
- USB Type-C implementations for muxing USB 3.2 superspeed signals.
- PCI Express lane switching between slots in PC and server motherboards.
- Routing high-speed interfaces such as SATA, SAS, LVDS, and Ethernet.
Procurement Notes
Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and temperature rating. Ensure the procurement channel provides valid traceability documentation. Confirm that the delivered components match the specified part number and revision level before integration into production systems.
Selection Notes
Select this component when designing circuits requiring bidirectional switching for high-speed differential interfaces like PCIe Gen 4.0 or USB 3.2. Consider the 13 GHz bandwidth and low insertion loss for maintaining signal integrity. Evaluate the thermal requirements based on the VQFN package and ensure the control logic aligns with the SEL and OEn pin specifications.
Part Context
This device belongs to the TMUXHS4212 series of high-speed analog switches. It is designed for generic differential signaling applications where adaptive voltage tracking is necessary. The RKST suffix indicates the specific reel packaging configuration for surface-mount assembly.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative devices by comparing electrical characteristics, pin configurations, and interface support protocols.
FAQ
What is the maximum differential amplitude supported by the TMUXHS4212?
The device supports a differential amplitude of up to 1800 mVpp.
How does the device handle common mode voltage variations?
It employs adaptive common mode voltage tracking to ensure the channel remains unchanged across the entire supported common mode voltage range of 0 V to 1.8 V.
What is the function of the OEn pin?
The OEn pin controls the power mode; pulling it low enables normal operation, while pulling it high activates the standby/shutdown mode to reduce power consumption.
