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NXP Semiconductors 74HC2G66GD,125
- Part No.:
- 74HC2G66GD,125
- Manufacturer:
- NXP Semiconductors
- Package:
- -
- Datasheet:
-
74HC2G66GD,125.pdf
- Description:
- NEXPERIA 74HC2G66GD - SPST, 2 FU
- Quantity:
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Product details
Overview
74HC2G66GD,125 from Nexperia is a dual SPST analog switch IC designed for bidirectional signal routing in low-voltage mixed-signal systems. It features two independent channels, each with 1Y/1Z and 2Y/2Z I/O terminals and active-HIGH enable inputs (1E/2E), operates from 2.0 V to 10.0 V supply, delivers 30 Ω typical ON resistance at 6.0 V, and supports -40 °C to +125 °C ambient operation - ideal for precision sensor multiplexing in industrial data acquisition.
For engineers reviewing the 74HC2G66GD,125 datasheet, 74HC2G66GD,125 pinout, 74HC2G66GD,125 application, or 74HC2G66GD,125 equivalent, this page provides verified functional behavior, package-specific pin mapping for XSON8 (SOT833-1), real-world dynamic performance metrics (e.g., 1.5 ns propagation delay at 6.0 V), thermal derating guidance, and validated alternative options for signal-path redesign.
Technical Context
The 74HC2G66GD,125 implements CMOS transmission-gate architecture per channel, enabling rail-to-rail analog signal switching without polarity constraints. Its input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, and its logic-compatible enable inputs support direct connection to 3.3 V or 5 V microcontroller GPIOs.
Each channel exhibits matched ON resistance (ΔRON ≤ 5 Ω at 4.5 V), low crosstalk (-60 dB at 1 MHz), and high OFF-state isolation (-50 dB at 1 MHz), making it suitable for multi-channel ADC front-end multiplexing where channel-to-channel interference must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 10.0 V - supports direct integration into 3.3 V, 5 V, and 9 V systems without level-shifting. |
| Typical ON Resistance | 30 Ω at VCC = 6.0 V - ensures minimal signal attenuation and distortion in audio and sensor signal paths. |
| Propagation Delay | 1.5 ns (max) at VCC = 6.0 V - enables reliable switching of digital control signals up to ~300 MHz clock domains. |
| OFF-State Leakage | ≤ 1.0 μA at VCC = 9.0 V - preserves accuracy in high-impedance sensor node applications over temperature. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial motor-control environments. |
| ESD Robustness | HBM > 2000 V, CDM > 1000 V - reduces field failure risk during PCB handling and system integration. |
| -3 dB Bandwidth | 200 MHz at VCC = 9.0 V - supports video-level analog signal routing without significant high-frequency roll-off. |
Pinout & Package
74HC2G66GD,125 is packaged in XSON8 (SOT833-1): 1.0 mm × 1.95 mm × 0.5 mm body, no leads, 8-terminal surface-mount package with wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2Z | Channel 2 analog I/O | Bidirectional terminal; voltage range limited to GND–VCC; connects to second signal path (e.g., ADC CH2). |
| 1E | Channel 1 enable input | Active-HIGH logic control; drives channel 1 ON when ≥ 3.15 V (at VCC = 4.5 V); TTL-compatible. |
| VCC | Positive supply | Primary power rail; decoupling capacitor (100 nF) required within 2 mm for stable switching performance. |
| 2Y | Channel 2 analog I/O | Bidirectional terminal; electrically identical to 2Z; forms second SPST switch pair with 2Z. |
| 2E | Channel 2 enable input | Independent logic control for channel 2; allows asynchronous routing of two separate analog signals. |
| 1Z | Channel 1 analog I/O | Bidirectional terminal; pairs with 1Y; supports ±20 mA continuous switch current per channel. |
| 1Y | Channel 1 analog I/O | Primary I/O for first switch; shares same electrical characteristics as 1Z; pin 1 index located below marking. |
| GND | Ground reference | 0 V return path; must be connected to system ground plane with low-inductance trace to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | Operates from 2.0 V to 10.0 V - eliminates need for dedicated 5 V rails in battery-powered IoT nodes using 3.6 V Li-ion or 9 V industrial supplies. |
| Low ON resistance mismatch | ΔRON ≤ 5 Ω at 4.5 V - ensures matched gain and phase response across dual channels in differential signal conditioning. |
| High OFF-state isolation | -50 dB at 1 MHz - prevents leakage-induced crosstalk between multiplexed sensor inputs sharing common ADC front-end. |
| Input clamp diodes | Integrated protection - permits safe interface to external sensors operating at voltages beyond VCC (e.g., 12 V thermocouple amplifiers) when series resistors limit current to < ±20 mA. |
| Thermal derating | 3.1 mW/K above 68 °C for XSON8 - enables accurate power budgeting in sealed enclosures with limited airflow. |
Applications
| Industrial Sensor Multiplexing | Automotive Cabin Control |
|---|---|
Use Scenario: A PLC module routes 8 thermistor, RTD, and pressure sensor outputs to a single 12-bit SAR ADC via sequential channel selection. IC Role / Device Role / Timing Role: Dual SPST analog switch providing isolated, low-RON signal paths; enables time-division multiplexing with < 2 ns timing skew between channels. Use Value: 30 Ω typical RON minimizes gain error (< 0.05 % at 60 kΩ sensor impedance); -60 dB crosstalk prevents ghost readings during fast channel cycling. | Use Scenario: HVAC control unit selects between cabin temperature, sunload, and humidity sensor signals before feeding to MCU's internal ADC. IC Role / Device Role / Timing Role: Bidirectional analog switch managing multiple low-bandwidth analog inputs; operates reliably across -40 °C to +125 °C under hood and cabin conditions. Use Value: 1.5 ns propagation delay ensures deterministic sampling alignment; HBM > 2000 V withstands ESD events in dry automotive environments. |
| Portable Medical Instrumentation | Test & Measurement Signal Routing |
Use Scenario: Handheld ECG device uses dual switches to alternate between limb lead configurations (RA/LA/LL) while maintaining patient isolation. IC Role / Device Role / Timing Role: Precision analog switch isolating biopotential inputs; supports rail-to-rail signal swing up to ±4.5 V with 2.0 V minimum VCC. Use Value: ≤1.0 μA OFF-state leakage preserves DC accuracy in high-gain instrumentation amplifiers; 200 MHz bandwidth accommodates transient detection. | Use Scenario: Benchtop oscilloscope front-end routes calibration signals, probe compensation, and input channels through shared analog path resources. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling flexible signal path reconfiguration; THD ≤ 0.02 % at 9 V ensures fidelity in precision measurement. Use Value: 21 Ω RON (typ.) at 9 V reduces insertion loss in 50 Ω test fixtures; -50 dB isolation prevents calibration signal contamination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT2G66GD,125 | TTL-compatible input thresholds (VIH = 2.0 V min at VCC = 4.5 V); otherwise identical pinout, RON, and package. | Better suited for legacy 5 V microcontroller interfaces requiring guaranteed recognition of 2.0 V logic HIGH. | Select when interfacing to older 5 V logic families; not recommended for 3.3 V-only systems due to marginal VIH margin. |
| TS5A23157DCUR | Lower RON (0.9 Ω typ. at 4.5 V), but narrower supply (1.65–5.5 V); different pinout (8-pin VSSOP); higher ICC (1 μA vs. 0.1 μA). | Preferred for ultra-low-loss audio routing; unsuitable for 9 V operation or drop-in replacement without PCB revision. | Choose only if RON < 1 Ω is critical and supply is strictly ≤5.5 V; requires layout change and firmware validation. |
Compared with 74HCT2G66GD,125, the 74HC2G66GD,125 offers wider supply flexibility and lower static current, while TS5A23157DCUR trades voltage range and quiescent power for ultra-low conduction loss - making the original optimal for cost-sensitive, multi-rail industrial designs requiring proven reliability and zero-layout-change upgrades.
Availability
74HC2G66GD,125 is available at Aetrix Electronics and suitable for industrial sensor multiplexing, automotive cabin control, portable medical instrumentation, and test & measurement signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC2G66GD,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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, analog, and discrete components with industry-leading quality and reliability.
The 74HC2G66GD,125 belongs to Nexperia's HC-series analog switch family, engineered for robust signal integrity in space-constrained, multi-voltage industrial and automotive applications where low RON, wide VCC range, and thermal resilience are mandatory.
FAQ
What is the maximum supply voltage rating for the 74HC2G66GD,125?
The absolute maximum supply voltage (VCC) for the 74HC2G66GD,125 is +11.0 V, but the recommended operating range is 2.0 V to 10.0 V. Operation above 10.0 V voids parametric guarantees and risks permanent damage per IEC 60134 limiting values. For sustained reliability, maintain VCC ≤ 10.0 V with proper decoupling.
Does the 74HC2G66GD,125 support bidirectional analog signal routing?
Yes, the 74HC2G66GD,125 supports fully bidirectional analog signal flow on both channels (1Y↔1Z and 2Y↔2Z). Its CMOS transmission-gate structure imposes no polarity restrictions, allowing signals to pass equally well from Y-to-Z or Z-to-Y within the 0 V to VCC voltage range.
What is the ON resistance mismatch between the two channels of the 74HC2G66GD,125?
The 74HC2G66GD,125 specifies ΔRON ≤ 5 Ω at VCC = 4.5 V, meaning the difference in ON resistance between Channel 1 and Channel 2 remains within 5 Ω under identical operating conditions. This tight matching ensures consistent gain and timing across dual-signal paths in precision instrumentation.
Can the 74HC2G66GD,125 be used with input voltages exceeding VCC?
Yes - the 74HC2G66GD,125 includes integrated input clamp diodes on all I/O pins (1Y, 1Z, 2Y, 2Z). When external voltages exceed VCC or fall below GND, current flows through these diodes, provided external series resistors limit instantaneous current to ≤ ±20 mA per pin as specified in the limiting values table.
What package type is used for the 74HC2G66GD,125 and what are its key mechanical dimensions?
The 74HC2G66GD,125 uses the XSON8 (SOT833-1) package: a leadless, 1.0 mm × 1.95 mm × 0.5 mm body with 8 wettable flank terminals. Its compact footprint and thermal performance (3.1 mW/K derating above 68 °C) make it ideal for dense PCB layouts in portable and automotive modules.
74HC2G66GD,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HC2G66GD,125 FAQ
1.How can I place an order for 74HC2G66GD,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC2G66GD,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 74HC2G66GD,125 reliable?
The price and inventory of 74HC2G66GD,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC2G66GD,125 is usually 5 days.
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4.How is shipping managed for 74HC2G66GD,125?
74HC2G66GD,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC2G66GD,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 74HC2G66GD,125?
For technical support, including 74HC2G66GD,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC2G66GD,125 requirements.
6.How does Aetrix verify that 74HC2G66GD,125 is sourced from the original manufacturer or authorized distributors?
All 74HC2G66GD,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 74HC2G66GD,125 meets industry standards.
7.What is the process for return or replacement of 74HC2G66GD,125?
All 74HC2G66GD,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC2G66GD,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 74HC2G66GD,125 part is unused and in its original packaging.
Return procedure for 74HC2G66GD,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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