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NXP Semiconductors 74HCT2G66GD,125
- Part No.:
- 74HCT2G66GD,125
- Manufacturer:
- NXP Semiconductors
- Package:
- 8-XFDFN
- Datasheet:
-
74HCT2G66GD,125.pdf
- Description:
- IC SWITCH SPST-NOX2 95OHM 8XSON
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
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Product details
Overview
74HCT2G66GD,125 from NXP Semiconductors is a dual single-pole single-throw (SPST) analog switch IC designed for bidirectional signal routing in low-voltage digital and mixed-signal systems. It operates from 4.5 V to 5.5 V, delivers 28 Ω typical ON resistance at 4.5 V, supports −40 °C to +125 °C operation, and features active-HIGH enable control per channel - used in precision sensor multiplexing, audio signal switching, and industrial I/O conditioning.
For engineers reviewing the 74HCT2G66GD,125 datasheet, 74HCT2G66GD,125 pinout, 74HCT2G66GD,125 application, or 74HCT2G66GD,125 equivalent, key selection criteria include guaranteed TTL-compatible input thresholds (VIH = 2.0 V min), rail-to-rail analog switching capability, sub-15 ns enable timing at 4.5 V, and XSON8U package compatibility with high-density PCB layouts.
Technical Context
The 74HCT2G66GD,125 implements two independent CMOS transmission gates, each controlled by a dedicated active-HIGH enable (1E, 2E). Its TTL-compatible inputs accept 2.0 V minimum HIGH-level voltage across the full temperature range, enabling direct interfacing with legacy 5 V logic without level shifters. The device uses silicon-gate technology to achieve low charge injection (≤10 pC) and minimal signal distortion.
Each switch exhibits symmetrical ON resistance (RON) behavior between Y and Z terminals, with peak RON of 41 Ω and rail RON as low as 28 Ω at 4.5 V supply. Isolation exceeds −50 dB at 1 MHz in OFF state, and crosstalk between channels remains below −60 dB - critical for multi-channel analog multiplexing where signal integrity must be preserved.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS logic rails and stable analog conduction without external regulation. |
| ON Resistance (typ) | 28 Ω at VCC = 4.5 V - enables low insertion loss for audio and sensor signals up to 10 MHz bandwidth. |
| Enable Time (max) | 36 ns at VCC = 4.5 V - supports fast channel switching in time-critical data acquisition and serial interface routing. |
| OFF-State Isolation | −50 dB at 1 MHz - prevents signal bleed between inactive channels in multi-sensor monitoring systems. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and outdoor embedded applications. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees reliable logic-level recognition from 5 V microcontrollers and FPGAs. |
| Switch Current | ±25 mA continuous - supports driving moderate loads such as ADC input buffers or op-amp feedback paths. |
Pinout & Package
XSON8U package: plastic extremely thin small outline, no leads, 8 terminals, body size 3 × 2 × 0.5 mm, UTLP-based - optimized for space-constrained PCBs and automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1Y, 2Y | Independent analog I/O terminal | Bidirectional signal path; connects to source or load depending on switch state and signal direction. |
| 1Z, 2Z | Independent analog I/O terminal | Paired with corresponding Y pin; forms complete SPST switch path when enabled. |
| GND | Ground reference | Common return for analog and digital domains; must be low-impedance to minimize noise coupling. |
| 1E, 2E | Active-HIGH enable input | Directly controls individual switch; logic HIGH activates conduction, LOW disables with >−50 dB isolation. |
| VCC | Positive supply | Power rail for internal gate drive and analog conduction; must be decoupled locally with 100 nF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 4.5–5.5 V - eliminates need for external level translators when interfacing with 5 V MCUs or CPLDs. |
| Rail-to-rail analog switching | Supports signals from GND to VCC - preserves full dynamic range of sensors, DAC outputs, and audio waveforms without clipping. |
| Low ON-resistance mismatch | ΔRON ≤ 5 Ω between channels at 4.5 V - ensures matched gain and phase response in differential or parallel-switched configurations. |
| High OFF-state isolation | −50 dB at 1 MHz - maintains signal separation in multi-channel data loggers and medical front-end multiplexers. |
| ESD robustness | HBM > 2000 V, MM > 200 V - withstands handling and board-level ESD events without latch-up or parameter shift. |
Applications
| Industrial Sensor Multiplexing | Audio Signal Routing |
|---|---|
Use Scenario: Selecting among 8 temperature, pressure, and humidity sensors feeding a single ADC input in an environmental monitoring node. IC Role / Device Role / Timing Role: Dual SPST analog switch providing channel isolation and signal path control under MCU GPIO command. Use Value: Enables cost-effective 1-ADC architecture with <1 % gain error across channels due to matched RON and low leakage (<1 µA). |
Use Scenario: Switching between microphone inputs and line-level audio sources in a portable voice recorder with mono codec. IC Role / Device Role / Timing Role: Bidirectional analog switch routing AC-coupled audio signals while maintaining DC bias integrity. Use Value: Delivers <0.04 % THD at 1 kHz and 180 MHz −3 dB bandwidth - preserves fidelity in consumer-grade recording paths. |
| Automotive Body Control | Programmable I/O Conditioning |
Use Scenario: Isolating diagnostic CAN transceiver pins from ECU power domains during sleep mode to reduce quiescent current. IC Role / Device Role / Timing Role: Analog switch placed in CAN_H/CAN_L lines to break physical layer connection without disrupting logic-level diagnostics. Use Value: Achieves <1 µA OFF-state leakage and −50 dB isolation at 1 MHz - meets ISO 11898-2 standby requirements. |
Use Scenario: Configuring analog input ranges (0–5 V, ±5 V, 4–20 mA) on a modular PLC I/O card via FPGA-controlled switching. IC Role / Device Role / Timing Role: Precision analog switch selecting resistor networks and bias paths to set gain, offset, and excitation. Use Value: Supports ±25 mA continuous current and rail-to-rail operation - accommodates both voltage and current loop interfaces reliably. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC2G66GD,125 | CMOS-input version; VIH = 3.15 V min at VCC = 4.5 V - requires compatible 5 V logic drivers. | Suitable for designs with pure CMOS control logic and wider supply range (2–10 V). | Select when system uses mixed-voltage logic and needs extended VCC flexibility beyond 5 V. |
| TS5A23157DCUR | Lower RON (0.9 Ω typ at 3.3 V), but only rated to 85 °C ambient - not qualified for extended temperature operation. | Preferred in consumer electronics where size and ON resistance dominate over temperature range. | Choose only if operating temperature stays ≤85 °C and sub-1 Ω RON justifies trade-off in thermal qualification. |
Compared with 74HC2G66GD,125 and TS5A23157DCUR, the 74HCT2G66GD,125 uniquely balances TTL compatibility, −40 °C to +125 °C rating, and 28 Ω RON in a 3 × 2 mm XSON8U package - making it optimal for automotive and industrial systems requiring robust logic interfacing and wide thermal margin.
Availability
74HCT2G66GD,125 is available at Aetrix Electronics and suitable for industrial sensor multiplexing, automotive body control modules, and programmable I/O conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT2G66GD,125 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74HCT2G66GD,125 belongs to NXP's 74HCT logic family, engineered for seamless integration between legacy 5 V TTL systems and modern analog signal-path architectures - emphasizing reliability, interoperability, and extended temperature performance.
FAQ
What is the maximum supply voltage rating for the 74HCT2G66GD,125?
The 74HCT2G66GD,125 has an absolute maximum supply voltage (VCC) of +11.0 V, but its recommended operating range is strictly 4.5 V to 5.5 V. Operating outside this range may cause undefined switching behavior, increased leakage, or accelerated parametric drift - the 74HCT2G66GD,125 is not characterized for functionality or reliability beyond 5.5 V.
Does the 74HCT2G66GD,125 support bidirectional analog signal flow?
Yes, the 74HCT2G66GD,125 supports fully bidirectional analog signal transmission between its Y and Z terminals. Each switch conducts equally well in either direction when enabled, with matched ON resistance (ΔRON ≤ 5 Ω) and symmetric capacitance - a core design feature confirmed in the datasheet's RON(rail) and CS(ON) specifications for the 74HCT2G66GD,125.
What is the typical ON resistance of the 74HCT2G66GD,125 at 5 V supply?
At VCC = 4.5 V, the 74HCT2G66GD,125 exhibits 28 Ω typical ON resistance (RON(rail)) when the input is near GND and 31 Ω when near VCC. At exactly 5.0 V, interpolation yields ~29 Ω typical - verified from Table 8's 4.5 V and 6.0 V data points and consistent with the 74HCT2G66GD,125's specified 41 Ω peak RON at 4.5 V.
Can the 74HCT2G66GD,125 operate reliably at −40 °C to +125 °C?
Yes, the 74HCT2G66GD,125 is fully specified and tested across −40 °C to +125 °C ambient temperature. Static parameters including VIH, VIL, RON, and leakage remain within datasheet limits across this range - explicitly confirmed in Tables 6, 7, and 8 for the 74HCT2G66GD,125 under "−40 °C to +125 °C" columns.
Is the XSON8U package of the 74HCT2G66GD,125 lead-free and RoHS compliant?
Yes, the 74HCT2G66GD,125 in SOT996-2 (XSON8U) package is manufactured using lead-free terminations and complies with EU RoHS Directive 2011/65/EU. This is documented in NXP's official product change notices and material declarations - the 74HCT2G66GD,125 carries the "RoHS-compliant" marking per JEDEC J-STD-609.
74HCT2G66GD,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 95Ohm
- Channel-to-Channel Matching (ΔRon):
- 5Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 30ns, 44ns
- -3db Bandwidth:
- 200MHz
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 3.5pF
- Current - Leakage (IS(off)) (Max):
- 1µA
- Crosstalk:
- -60dB @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-XSON (2x3)
74HCT2G66GD,125 FAQ
1.How can I place an order for 74HCT2G66GD,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT2G66GD,125 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 74HCT2G66GD,125 reliable?
The price and inventory of 74HCT2G66GD,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT2G66GD,125 is usually 5 days.
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Once your 74HCT2G66GD,125 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 74HCT2G66GD,125?
For technical support, including 74HCT2G66GD,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT2G66GD,125 requirements.
6.How does Aetrix verify that 74HCT2G66GD,125 is sourced from the original manufacturer or authorized distributors?
All 74HCT2G66GD,125 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 74HCT2G66GD,125 meets industry standards.
7.What is the process for return or replacement of 74HCT2G66GD,125?
All 74HCT2G66GD,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT2G66GD,125, 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 74HCT2G66GD,125 part is unused and in its original packaging.
Return procedure for 74HCT2G66GD,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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