NXP Semiconductors 74HCT2G17GW/C125

Overview

74HCT2G17GW/C125 from Nexperia is a dual non-inverting Schmitt trigger buffer IC designed for noise-immune signal conditioning in digital interfaces. It features TTL-compatible inputs, operates from 4.5 V to 5.5 V, delivers propagation delay of 21–45 ns (−40 °C to +125 °C), and supports industrial temperature range up to +125 °C. It is used in wave shaping for noisy sensor interfaces and multivibrator timing circuits.

For engineers reviewing the 74HCT2G17GW/C125 datasheet, 74HCT2G17GW/C125 pinout, 74HCT2G17GW/C125 application, or 74HCT2G17GW/C125 equivalent, this page provides verified functional identity, validated TSSOP6 package mapping, confirmed Schmitt-trigger hysteresis (0.4–0.67 V), real-world input threshold voltages (VT+ = 1.2–2.1 V), and two technically documented alternative parts with explicit differences.

Technical Context

The 74HCT2G17GW/C125 implements two independent non-inverting Schmitt-trigger buffers with TTL-level input thresholds and CMOS-compatible outputs. Its input clamping diodes allow safe interfacing to signals exceeding VCC when current-limiting resistors are used.

It transforms slow-rising/falling analog-like inputs into clean digital outputs via hysteresis (VH = 0.4–0.67 V), eliminating chatter in noisy environments. Propagation delay (tpd) and transition time (tt) are specified across −40 °C to +125 °C at VCC = 4.5 V and 5.5 V with 50 pF load.

Key Specifications

Pinout & Package

TSSOP6 (SOT363-2) plastic thin shrink small outline package, 6-lead, body width 1.25 mm, pin 1 indicator located on lower left corner below marking code 'TV'.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Schmitt trigger buffer applications.

Compared with 74HCT2G17GW/C125, the GV variant offers identical functionality in a physically larger but thermally robust SC-74 package, while the SN74LVC2G17DBVR provides higher speed and broader voltage support at the cost of TTL input compatibility - making it unsuitable as a direct replacement in legacy 5 V systems.

Availability

74HCT2G17GW/C125 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, sensor interface modules, and embedded timing circuits requiring stable component supply across extended temperature ranges.

Supply support for 74HCT2G17GW/C125 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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HCT2G17GW/C125 belongs to Nexperia's 74HCT logic family, engineered specifically for robust 5 V TTL-compatible interfacing in electrically noisy industrial and automotive environments.

FAQ

What is the exact function of the 74HCT2G17GW/C125?

The 74HCT2G17GW/C125 is a dual non-inverting Schmitt trigger buffer IC. It accepts two independent TTL-level inputs and produces two corresponding clean, jitter-free digital outputs using internal hysteresis. Its primary role is noise-immune signal conditioning - transforming slow or noisy waveforms into well-defined logic transitions. This exact behavior is confirmed in the functional table and transfer characteristics of the official Nexperia datasheet Rev. 3 (2023).

Does the 74HCT2G17GW/C125 support 3.3 V operation?

No, the 74HCT2G17GW/C125 does not support 3.3 V operation. Its recommended operating supply voltage is strictly 4.5 V to 5.5 V, as defined in Table 6 of the datasheet. At VCC = 3.3 V, input thresholds (VT+, VT−) fall outside TTL specification, and output drive capability degrades significantly. For 3.3 V systems, consider the 74LVC2G17 series instead - but note that 74HCT2G17GW/C125 itself is not rated or characterized for 3.3 V use.

What is the hysteresis voltage (VH) of the 74HCT2G17GW/C125?

The hysteresis voltage (VH) of the 74HCT2G17GW/C125 is 0.40 V (min) to 0.67 V (max) across −40 °C to +125 °C at VCC = 4.5–5.5 V, per Table 12. This value represents the difference between positive-going (VT+) and negative-going (VT−) input thresholds and is critical for rejecting noise on input signals. The typical VH is 0.71 V at VCC = 4.5 V and Tamb = 25 °C, enabling reliable operation in electrically harsh environments.

Can the 74HCT2G17GW/C125 drive a 50 pF load at full speed?

Yes, the 74HCT2G17GW/C125 is fully characterized driving a 50 pF capacitive load, as specified in Table 9 (Dynamic Characteristics). At VCC = 4.5 V and Tamb = −40 °C to +125 °C, its propagation delay (tpd) is 21–45 ns and transition time (tt) is 6–22 ns into 50 pF. These values were measured using the test circuit in Figure 6 of the datasheet, confirming guaranteed performance under standard loading conditions used in industrial timing and interface design.

Is the 74HCT2G17GW/C125 pin-compatible with the 74HC2G17GW?

Yes, the 74HCT2G17GW/C125 is pin-compatible with the 74HC2G17GW - both share identical TSSOP6 (SOT363-2) pinout, pin functions, and package dimensions. However, they differ electrically: 74HC2G17GW uses CMOS-level inputs (VIH = 3.15 V min at VCC = 4.5 V), while 74HCT2G17GW/C125 uses TTL-level inputs (VIH = 2.0 V min). Substitution requires verifying input source compatibility; the 74HCT2G17GW/C125 cannot replace 74HC2G17GW in high-VCC CMOS systems without risk of incorrect logic interpretation.