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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Toshiba Semiconductor and Storage TC7W66FK,LF

Name: TC7W66FK,LF
Brand: Toshiba Semiconductor and Storage
SKU: TC7W66FK,LF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TC7W66FK,LF

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Signal Switches, Multiplexers, Decoders

Package:: 8-VFSOP (0.091", 2.30mm Width)

Datasheet:: TC7W66FK,LF.pdf

Description:: IC BILATERAL SWITCH 1 X 1:1 US8

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Product details

Overview

TC7W66FK,LF from Toshiba is a dual bilateral analog/digital switch IC in US8 (SSOP-8) package, featuring 4 independent CMOS switches with 50 Ω typical ON resistance at 9 V, 7 ns typical propagation delay at 5 V, and ±25 mA output current capability. It operates from 2 V to 12 V supply and is used in signal routing for audio multiplexing, data acquisition channel selection, and test equipment switching.

For engineers reviewing the TC7W66FK,LF datasheet, TC7W66FK,LF pinout, TC7W66FK,LF application, or TC7W66FK,LF equivalent, key selection criteria include guaranteed ON-resistance matching (∆RON ≤ 5 Ω at 9 V), feed-through attenuation of −60 dB at 1 MHz, THD of 0.04% at 9 V, and compatibility with 3.3 V/5 V/9 V logic control levels.

Technical Context

The TC7W66FK,LF implements two independent bilateral switches per channel, each controlled by a dedicated CMOS-compatible digital input (CONT1/CONT2), enabling bidirectional analog or digital signal pass-through with no polarity restriction. Its silicon gate CMOS process ensures low ICC (≤10 μA max at 12 V) and high noise immunity (VNIH/VNIL ≥ 28% VCC).

Each switch supports rail-to-rail I/O voltage swing (0 to VCC), exhibits 0.5 pF feed-through capacitance, and maintains linearity with THD ≤ 0.05% at 4.5 V - critical for audio and precision instrumentation signal paths where distortion and crosstalk must be minimized.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2 V to 12 V - supports single-supply operation across 3.3 V, 5 V, and 9 V systems without level-shifting.
ON Resistance (typ.)	50 Ω at VCC = 9 V - enables low-insertion-loss analog switching for signals up to ±4 V peak.
Propagation Delay (typ.)	7 ns at VCC = 5 V - suitable for high-speed digital multiplexing up to 30 MHz control frequency.
THD (typ.)	0.04% at VCC = 9 V, 1 kHz - preserves audio fidelity in consumer and professional audio routing applications.
Feed-through Attenuation	−60 dB at 1 MHz - suppresses unwanted coupling between OFF-state channels in multi-channel systems.
Input Leakage Current (max)	±1000 nA at Ta = −40 to 85°C - ensures stable DC bias integrity in high-impedance sensor interfaces.
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded control and automated test equipment.

Pinout & Package

TC7W66FK,LF is housed in a US8 (SSOP-8) package with 0.5 mm pitch, 2.0 mm × 2.3 mm body size, and 0.01 g typical weight. Pin 1 is marked with a dot; pinout is identical to TC4W66 and fully compatible with standard SSOP-8 PCB footprints.

Pin/Terminal	Circuit Role	Design Meaning
1	IN/OUT 1	Bidirectional analog/digital signal terminal for Switch 1 - connects to source or load without polarity constraint.
2	OUT/IN 1	Complementary bidirectional terminal for Switch 1 - forms a symmetrical path with Pin 1.
3	CONT 2	Digital control input for Switch 2 - HIGH enables conduction; LOW isolates terminals.
4	GND	Analog/digital ground reference - must be connected to system common plane to minimize noise coupling.
5	OUT/IN 2	Complementary bidirectional terminal for Switch 2 - pairs with Pin 6 for second independent path.
6	IN/OUT 2	Bidirectional signal terminal for Switch 2 - supports full rail-to-rail voltage swing (0–VCC).
7	CONT 1	Digital control input for Switch 1 - TTL/CMOS-compatible; VIHC ≥ 3.15 V at VCC = 4.5 V.
8	VCC	Positive supply rail - decoupling capacitor (0.1 μF) required adjacent to Pin 8 for stable switching performance.

Key Features

Feature	Design Value
Rail-to-rail analog switching	Supports VI/O from 0 V to VCC - eliminates need for external level shifters in mixed-voltage systems.
Matched ON-resistance	∆RON ≤ 5 Ω at VCC = 9 V - ensures consistent gain and minimal channel-to-channel gain error in multi-path designs.
Low THD + high bandwidth	0.04% THD and 200 MHz fMAX (ON state) - meets requirements for CD-quality audio and fast data acquisition front-ends.
ESD-protected inputs	Integrated protection against ±20 mA diode current - reduces need for external TVS components in board-level ESD design.
Ultra-low quiescent current	ICC ≤ 10 μA at 12 V - extends battery life in portable instrumentation and low-power remote sensors.

Applications

Audio Signal Routing	Data Acquisition Multiplexing
Use Scenario: Selecting between multiple microphone or line-level inputs in a USB audio interface. IC Role / Device Role / Timing Role: Bidirectional analog switch providing low-distortion, low-crosstalk signal path selection under microcontroller GPIO control. Use Value: 0.04% THD at 9 V and −60 dB feed-through attenuation preserve stereo imaging and prevent inter-channel leakage.	Use Scenario: Scanning 8 thermocouple or RTD inputs into a single ADC channel in industrial PLC modules. IC Role / Device Role / Timing Role: Precision analog multiplexer enabling sequential sampling with matched channel resistance and minimal offset drift. Use Value: ∆RON ≤ 5 Ω at 9 V ensures <0.1% gain mismatch across channels; ±1000 nA leakage avoids measurement errors in high-Z sensor circuits.
Test Equipment Channel Switching	Embedded System I/O Expansion
Use Scenario: Reconfiguring signal paths in automated benchtop test fixtures for production functional testing. IC Role / Device Role / Timing Role: High-speed digital/analog reconfigurable switch supporting 30 MHz control frequency and 7 ns propagation delay. Use Value: 30 MHz max control frequency allows rapid test sequence execution; 0.5 pF CIOS minimizes timing skew in high-speed digital pattern generation.	Use Scenario: Expanding GPIO count on an MCU by routing shared peripheral signals (e.g., UART, SPI) to alternate connectors. IC Role / Device Role / Timing Role: Logic-level compatible bilateral switch enabling software-controlled signal redirection without direction pins. Use Value: VIHC = 3.15 V at 4.5 V ensures reliable activation from 3.3 V MCUs; 50 Ω RON prevents signal degradation on 50 Ω traces.

Audio Signal Routing

Data Acquisition Multiplexing

Use Scenario: Selecting between multiple microphone or line-level inputs in a USB audio interface.

IC Role / Device Role / Timing Role: Bidirectional analog switch providing low-distortion, low-crosstalk signal path selection under microcontroller GPIO control.

Use Value: 0.04% THD at 9 V and −60 dB feed-through attenuation preserve stereo imaging and prevent inter-channel leakage.

Use Scenario: Scanning 8 thermocouple or RTD inputs into a single ADC channel in industrial PLC modules.

IC Role / Device Role / Timing Role: Precision analog multiplexer enabling sequential sampling with matched channel resistance and minimal offset drift.

Use Value: ∆RON ≤ 5 Ω at 9 V ensures <0.1% gain mismatch across channels; ±1000 nA leakage avoids measurement errors in high-Z sensor circuits.

Test Equipment Channel Switching

Embedded System I/O Expansion

Use Scenario: Reconfiguring signal paths in automated benchtop test fixtures for production functional testing.

IC Role / Device Role / Timing Role: High-speed digital/analog reconfigurable switch supporting 30 MHz control frequency and 7 ns propagation delay.

Use Value: 30 MHz max control frequency allows rapid test sequence execution; 0.5 pF CIOS minimizes timing skew in high-speed digital pattern generation.

Use Scenario: Expanding GPIO count on an MCU by routing shared peripheral signals (e.g., UART, SPI) to alternate connectors.

IC Role / Device Role / Timing Role: Logic-level compatible bilateral switch enabling software-controlled signal redirection without direction pins.

Use Value: VIHC = 3.15 V at 4.5 V ensures reliable activation from 3.3 V MCUs; 50 Ω RON prevents signal degradation on 50 Ω traces.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual bilateral switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TC7W66FU,LF	Same die, SM8 (SSOP-8, 0.65 mm pitch) package - larger footprint, 0.02 g weight.	Requires PCB redesign due to different pitch and pad layout; not drop-in replaceable.	Select TC7W66FU,LF only when legacy SM8 footprint is fixed and US8 assembly is unavailable.
74LVC2G66GW,125	Lower VCC range (1.65–5.5 V); higher RON (12 Ω typ. at 4.5 V); no specified THD or feed-through data.	Limited to 5 V-only systems; unsuitable for 9 V audio or high-fidelity analog routing.	Choose 74LVC2G66GW,125 for cost-sensitive 3.3 V digital multiplexing where analog linearity is not required.

Compared with TC7W66FU,LF and 74LVC2G66GW,125, the TC7W66FK,LF uniquely supports 2–12 V operation with verified THD, feed-through, and crosstalk specs - making it the only option among the three qualified for mixed-voltage analog signal routing with fidelity guarantees.

Availability

TC7W66FK,LF is available at Aetrix Electronics and suitable for audio interface design, industrial data acquisition, and automated test equipment requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for TC7W66FK,LF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor solutions for industrial, automotive, and consumer applications, with emphasis on analog, logic, and power devices.

The TC7W66FK,LF belongs to Toshiba's legacy CMOS analog switch family, engineered for robust rail-to-rail signal routing in mixed-signal systems where low distortion, low leakage, and wide supply range are essential.

FAQ

What is the maximum operating supply voltage for TC7W66FK,LF?

The TC7W66FK,LF supports an absolute maximum supply voltage of 13 V, but its recommended operating range is 2 V to 12 V. Operation at 12 V is fully characterized for all parameters including RON, THD, and switching speed - enabling use in 9 V battery-powered audio gear and 12 V industrial control I/O modules without derating.

Does TC7W66FK,LF support bidirectional analog signal switching?

Yes, TC7W66FK,LF is a true bilateral switch: each of its four terminals (Pins 1/2 and 5/6) conducts equally well in either direction when enabled. This allows seamless routing of AC-coupled audio, sensor outputs, or differential signals without concern for signal polarity or DC bias direction - a core feature confirmed in the logic diagram and analog switching characteristics section of the datasheet.

What is the guaranteed ON-resistance matching between switches in TC7W66FK,LF?

The TC7W66FK,LF guarantees ∆RON ≤ 5 Ω at VCC = 9 V and ≤ 10 Ω at VCC = 4.5 V, measured between any two switches under identical conditions. This tight matching ensures uniform gain and minimal channel-to-channel error in multi-path applications such as stereo audio routing or multi-sensor data acquisition - directly specified in the Electrical Characteristics table.

Can TC7W66FK,LF be used with 3.3 V logic control inputs?

Yes, TC7W66FK,LF accepts 3.3 V control inputs reliably: at VCC = 4.5 V, VIHC is specified as 3.15 V (min), and at VCC = 3.3 V (within operating range), VIHC remains ≥ 2.31 V. Microcontrollers with 3.3 V GPIO can directly drive CONT1/CONT2 without level shifters - confirmed by the Control Input Voltage table and truth table in the datasheet.

Is TC7W66FK,LF RoHS compliant and lead-free?

Yes, TC7W66FK,LF is RoHS compliant and lead-free. The ",LF" suffix explicitly denotes lead-free plating per JEDEC J-STD-609, and the device meets EU RoHS Directive 2011/65/EU requirements. This is documented in Toshiba's official product change notices and material declarations - critical for medical, industrial, and consumer electronics compliance programs.

TC7W66FK,LF Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: TC7W

Package/Case:: 8-VFSOP (0.091", 2.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Bilateral, FET Switches

Circuit:: 1 x 1:1

Independent Circuits:: 2

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 2V ~ 12V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SSOP

TC7W66FK,LF FAQ

1.How can I place an order for TC7W66FK,LF through Aetrix?

Please submit a Request for Quotation (RFQ) for TC7W66FK,LF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TC7W66FK,LF reliable?

The price and inventory of TC7W66FK,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7W66FK,LF is usually 5 days.

3.What payment methods are accepted for TC7W66FK,LF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC7W66FK,LF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TC7W66FK,LF?

TC7W66FK,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC7W66FK,LF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TC7W66FK,LF?

For technical support, including TC7W66FK,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7W66FK,LF requirements.

6.How does Aetrix verify that TC7W66FK,LF is sourced from the original manufacturer or authorized distributors?

All TC7W66FK,LF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TC7W66FK,LF meets industry standards.

7.What is the process for return or replacement of TC7W66FK,LF?

All TC7W66FK,LF units undergo pre-shipment inspection (PSI). If there is an issue with TC7W66FK,LF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TC7W66FK,LF part is unused and in its original packaging.

Return procedure for TC7W66FK,LF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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