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Product Detailed Parameters
- Description：IC SWITCH SPDT X 1 8OHM SC70-6
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Switch Circuit：SPDT
- Multiplexer/Demultiplexer Circuit：2:01
- On-State Resistance (Max)：8Ohm
- Channel-to-Channel Matching (ΔRon)：300mOhm (Typ)
- Voltage - Supply, Single (V+)：4V ~ 12V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：20µs
- -3db Bandwidth：340MHz
- Charge Injection：-25pC
- Channel Capacitance (CS(off), CD(off))：10pF
- Current - Leakage (IS(off)) (Max)：15µA
- Crosstalk：-42dB @ 10MHz
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：6-TSSOP, SC-88, SOT-363
- Supplier Device Package：SC-70-6
- Number of Circuits：1
- Grade：-
- Qualification：-
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Overview
The TMUX4157NDCKR is a single-channel, 2:1 (SPDT) analog switch manufactured by Texas Instruments in an SC-70-6 package. It operates on a negative supply voltage ranging from -4 V to -12 V and supports bidirectional signals from GND to VSS. The device features a low on-resistance of 1.8 Ω typical at -12 V, with a maximum of 8 Ω at -4 V. It utilizes 1.8 V logic compatible inputs for control, allowing operation up to 5.5 V on the SEL pin. Key electrical parameters include a bandwidth of 340 MHz, off-isolation of -65 dB at 1 MHz, and transition times between 200 ns and 280 ns depending on supply voltage.
Feature Summary
- Supports negative supply rails from -4 V to -12 V while accepting positive logic control voltages up to 5.5 V
- Features fail-safe logic that allows control pin voltage application prior to power supply activation
- Provides rail-to-rail signal path operation supporting both analog and digital signals bidirectionally
- Incorporates break-before-make switching to prevent simultaneous connection of multiple sources
Applications
- GaN Power Amplifier Gate Switching
- Remote Radio Units (RRU)
- Active Antenna System mMIMO (AAS)
- Baseband Unit (BBU)
- Wireless Communications Test
Procurement Notes
Verify the component against the official Texas Instruments datasheet SCDS428A to confirm authenticity and revision status. Ensure the ordering suffix matches the required packaging format, as variations exist for tape and reel quantities. Cross-reference the specific part number with authorized distributors to validate production data status and availability constraints before finalizing procurement decisions.
Selection Notes
Select this component when a system requires switching between two negative voltage sources using standard positive logic levels. The 1.8 V logic compatibility eliminates the need for external level shifters, simplifying interface with microcontrollers or FPGAs. Consider the thermal resistance and power dissipation limits if operating near the maximum continuous current ratings within the specified temperature range.
Part Context
This device belongs to the TMUX4157N family of general-purpose SPDT switches designed specifically for negative voltage applications. It is distinct from standard unipolar switches due to its ability to handle signals ranging from ground to a negative rail. The DCKR suffix indicates the SC-70-6 package configuration with specific reel packaging options provided by the manufacturer.
Replacement Considerations
Direct substitutes within the same family include other variants of the TMUX4157N series. Verify pinout compatibility and electrical specifications such as on-resistance and supply voltage ranges when considering alternative packages or updated revisions from the manufacturer.
