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Product Detailed Parameters
- Description：IC SWITCH 4PST-NOX2 17OHM 20QSOP
- Series：-
- Mfr：IDT, Integrated Device Technology Inc
- Package：Bulk
- Switch Circuit：4PST - NO
- Multiplexer/Demultiplexer Circuit：-
- On-State Resistance (Max)：17Ohm
- Channel-to-Channel Matching (ΔRon)：-
- Voltage - Supply, Single (V+)：5V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：6.5ns, 6ns
- -3db Bandwidth：1.3GHz
- Charge Injection：1.5pC
- Channel Capacitance (CS(off), CD(off))：5pF
- Current - Leakage (IS(off)) (Max)：1nA
- Crosstalk：-70dB @ 5.5MHz
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：20-QSOP
- Number of Circuits：2
- Grade：-
- Qualification：-
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Overview
The QS4A105QG is a dual analog switch manufactured by IDT, now part of Renesas Electronics. It contains two independent 4-pole single-throw normally-open circuits within a single package. The device features a maximum on-resistance of 17 ohms and operates with a single 5V power supply. Key electrical specifications include a -3dB bandwidth of 1.3GHz, charge injection of 1.5pC, and leakage current of 1nA maximum. Switching times are specified at 6.5ns for turn-on and 6ns for turn-off. The component is housed in a 20-pin QSOP package and supports an operating temperature range from -40°C to 85°C.
Feature Summary
- Dual-channel architecture providing two independent 4PST switching paths
- High-speed signal routing capability with 1.3GHz bandwidth
- Low distortion performance characterized by minimal charge injection
- Compact surface-mount packaging for space-constrained designs
Applications
- Signal multiplexing in data acquisition systems
- Audio and video signal routing
- Test and measurement equipment signal paths
Procurement Notes
Verify the specific suffix 'G' against official Renesas documentation to confirm lead-free compliance and RoHS status. Confirm availability as the product line may have undergone retraction or obsolescence notices. Ensure the 20-QSOP package matches the target PCB footprint requirements before ordering.
Selection Notes
Select this component when dual isolated 4-channel switching is required within a limited board area. Compare on-resistance stability and bandwidth requirements against alternative analog switches. Verify that the 5V single-supply operation aligns with the system voltage rails and that the thermal characteristics suit the intended environment.
Part Context
This part belongs to the QS4A105 family of analog switches. IDT was acquired by Renesas Electronics Corporation, which continues to manage the product lifecycle. The QS4A105QG represents a specific variant within this series, distinguished by its package type and manufacturing revisions documented in public datasheets.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Renesas documentation for any listed compatible replacements or cross-reference options.
