NXP Semiconductors 74LVCV2G66GTX

Overview

74LVCV2G66GTX from Nexperia is a dual-channel, overvoltage-tolerant bilateral analog/digital switch in XSON8 package, operating from 2.3 V to 5.5 V supply, with typical ON resistance of 7.3 Ω at 5.0 V and 5.5 V tolerant switch terminals - used for signal routing in portable battery-powered systems requiring level-shifting and low quiescent current.

For engineers reviewing the 74LVCV2G66GTX datasheet, 74LVCV2G66GTX pinout, 74LVCV2G66GTX application, or 74LVCV2G66GTX equivalent, key selection criteria include overvoltage tolerance beyond VCC, ultra-low enable input current (ΔICC ≤ 5 μA), rail-to-rail switch voltage capability (–0.5 V to +6.5 V), and thermal performance across –40 °C to +125 °C.

Technical Context

The 74LVCV2G66GTX implements two independent SPST analog switches with active-HIGH enable inputs (1E, 2E) and bidirectional signal paths between Z (overvoltage-tolerant terminal) and Y (standard I/O terminal). Each switch supports ±32 mA continuous current and maintains sub-10 Ω ON resistance across its full 2.3 V–5.5 V supply range.

Its CMOS Si-gate architecture enables high noise immunity, latch-up immunity >250 mA, and ESD robustness per HBM (>2000 V) and CDM (>1000 V). The device operates without external current-limiting resistors on enable lines due to <1 μA leakage and <5 μA ΔICC at VCC = 5.5 V.

Key Specifications

Pinout & Package

XSON8 package (SOT833-1): plastic extremely thin small outline, no leads, 8-terminal, body size 1.0 mm × 1.95 mm × 0.5 mm, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCV2G66GTX, the 74LVC2G66GT offers identical performance in a functionally interchangeable package, while the SN74LVC2G66DCKR trades overvoltage safety and miniaturization for broader distributor availability - making 74LVCV2G66GTX optimal for next-gen portable and industrial designs demanding voltage-agnostic signal routing.

Availability

74LVCV2G66GTX is available at Aetrix Electronics and suitable for portable medical monitors, industrial sensor hubs, USB-C peripheral docking stations, and battery-powered test equipment requiring stable component supply with guaranteed long-term manufacturability.

Supply support for 74LVCV2G66GTX 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, mobile, and computing markets.

The 74LVCV2G66GTX belongs to Nexperia's LVC logic family designed specifically for low-power, overvoltage-tolerant signal switching in space- and energy-constrained applications - emphasizing robustness, miniaturization, and mixed-voltage interoperability.

FAQ

What is the maximum overvoltage the 74LVCV2G66GTX switch terminals can handle?

The 74LVCV2G66GTX Z terminals (1Z and 2Z) tolerate voltages from –0.5 V to +6.5 V regardless of VCC level, enabling safe switching of 5.5 V analog signals even when powered from 2.3 V. This overvoltage capability is validated per IEC 60134 limiting values and applies in both ON and OFF states - critical for protecting downstream 3.3 V logic from 5 V sensor transients. The 74LVCV2G66GTX maintains this rating across its full –40 °C to +125 °C operating range.

Does the 74LVCV2G66GTX require external current-limiting resistors on its enable inputs?

No, the 74LVCV2G66GTX does not require external current-limiting resistors on its enable inputs (1E and 2E) due to ultra-low input leakage (±0.1 μA max) and minimal ΔICC (≤5 μA at VCC = 5.5 V). This design eliminates power-wasting resistors in portable applications - unlike legacy '66' switches that demand such resistors to limit enable current. The 74LVCV2G66GTX achieves this while maintaining 5 V tolerance on all digital inputs, simplifying interface design with diverse logic families.

What is the typical ON resistance of the 74LVCV2G66GTX at 3.3 V supply?

The 74LVCV2G66GTX exhibits a typical ON resistance of 7.5 Ω at VCC = 3.3 V, measured with 24 mA switch current and ambient temperature of 25 °C. This value remains stable across –40 °C to +125 °C, with worst-case RON(peak) ≤ 20 Ω under full temperature and load conditions. The low and flat ON resistance ensures minimal insertion loss and distortion in analog signal paths - verified via THD <0.07% at 3.0 V and f(–3dB) >200 MHz - making the 74LVCV2G66GTX suitable for high-fidelity audio and high-speed data routing.

Can the 74LVCV2G66GTX be used to switch bidirectional I²C signals?

Yes, the 74LVCV2G66GTX supports bidirectional I²C signal routing (SDA/SCL) due to its true bilateral switch architecture, low ON capacitance (CS(ON) = 16 pF), and rail-to-rail voltage handling. Its propagation delay (<0.8 ns at 3.3 V) and low charge injection (≤0.003 pC) prevent bus glitches and clock stretching issues. However, pull-up resistors must remain on the master side only, and the 74LVCV2G66GTX must be placed within I²C timing budget - confirmed by tpd ≤ 0.8 ns and rise/fall time compatibility with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications.

What package type is used for the 74LVCV2G66GTX and what are its key mechanical dimensions?

The 74LVCV2G66GTX uses the XSON8 package (SOT833-1): an 8-terminal, leadless plastic package measuring 1.0 mm × 1.95 mm × 0.5 mm with 0.5 mm pitch. It features exposed pad-less construction, moisture sensitivity level MSL3, and a thermal resistance (RθJA) of 220 K/W. This ultra-compact footprint reduces PCB area by >40% versus VSSOP8 alternatives - critical for wearable and handheld designs - while maintaining full thermal performance across –40 °C to +125 °C ambient operation.