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Product Detailed Parameters
- Description：ANALOG FOUR-CH SPST SWITCH
- Series：*
- Mfr：IDT, Integrated Device Technology Inc
- Package：Bulk
- Switch Circuit：-
- Multiplexer/Demultiplexer Circuit：-
- On-State Resistance (Max)：-
- Channel-to-Channel Matching (ΔRon)：-
- Voltage - Supply, Single (V+)：-
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：-
- -3db Bandwidth：-
- Charge Injection：-
- Channel Capacitance (CS(off), CD(off))：-
- Current - Leakage (IS(off)) (Max)：-
- Crosstalk：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Number of Circuits：-
- Grade：-
- Qualification：-
Download product information
Overview
The QS4A101X is a high-performance CMOS analog four-channel single-pole single-throw (SPST) switch manufactured by IDT. It features individual channel enables and supports bidirectional signal flow on a single 5V supply. The device provides low ON resistance of 5 ohms and a wide bandwidth with a -3dB point at 1.4GHz. Key electrical specifications include off-isolation of -100dB at 50KHz, -75dB at 5MHz, and -45dB at 30MHz. Quiescent current is ultra-low at 3 uA, with a switch turn-on time of 6.5ns. It operates within a temperature range of -40°C to +85°C.
Feature Summary
- Four independent SPST channels with individual enable controls
- Bidirectional signal flow capability for flexible routing
- Ultra-low quiescent current consumption suitable for battery operation
- High bandwidth performance optimized for video and audio signals
Applications
- High-performance video signal switching
- Audio signal switching
- Telecommunications routing applications
Procurement Notes
Verify the specific suffix 'X' against official IDT documentation to confirm package type and temperature grade. Ensure compatibility with standard SSOP or QSOP footprints if replacing legacy components. Confirm RoHS status as original datasheets may indicate non-compliance depending on manufacturing date.
Selection Notes
Select this component when designing systems requiring low distortion analog switching with minimal power draw. The 5V single-supply operation simplifies power management compared to dual-rail solutions. Verify that the 5-ohm ON resistance meets the signal integrity requirements for the specific application bandwidth.
Part Context
The QS4A101X belongs to IDT's portfolio of high-speed CMOS analog switches. It is designed to replace older bipolar or lower-speed CMOS alternatives in portable and remote instrumentation equipment where power efficiency and signal fidelity are critical constraints.
Replacement Considerations
Check pinout compatibility with existing designs before substitution. Verify that the replacement part supports the required 1.4GHz bandwidth and 5V operating voltage.
