onsemi 74HC14DTR2G

Overview

74HC14DTR2G from onsemi is a hex Schmitt-trigger inverter IC in TSSOP-14 package, operating from 2.0 V to 6.0 V, delivering 10 LSTTL load drive capability, with input hysteresis (V_H = 0.2–3.0 V) and propagation delay as low as 13 ns at 6 V. It is used to condition slow or noisy digital signals in clock conditioning, debouncing, and waveform shaping circuits.

For engineers reviewing the 74HC14DTR2G datasheet, pinout, applications, or equivalent options, key selection criteria include supply voltage range, input threshold hysteresis, output drive strength, AC timing under 50 pF load, and Pb-free TSSOP-14 thermal and mounting compatibility.

Technical Context

The 74HC14DTR2G implements six independent CMOS Schmitt-trigger inverters using high-performance silicon-gate technology. Each channel features asymmetric input thresholds (V_T+ = 0.95–4.20 V, V_T− = 0.3–2.65 V) enabling noise-immune signal regeneration.

It operates across –55 °C to +125 °C with DC input leakage ≤ ±1.0 µA and quiescent ICC ≤ 40 µA at 6 V. Propagation delays (t_PLH/t_PHL) range from 13 ns (6 V) to 110 ns (2 V), and output transition times (t_TLH/t_THL) match closely under identical conditions.

Key Specifications

Pinout & Package

TSSOP-14 (Case 948G), 4.9 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch, Pb-free, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex Schmitt-trigger inverter applications.

Compared with SN74HC14PWR and MC74HC14ADTR2G, the 74HC14DTR2G offers balanced performance across industrial temperature range and higher ICC headroom-making it preferred for systems with variable V_CC or marginal decoupling.

Availability

74HC14DTR2G is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and consumer appliance timing circuits requiring stable component supply and long-term lifecycle support.

Supply support for 74HC14DTR2G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The 74HC14DTR2G belongs to onsemi's high-speed CMOS logic family, designed for robust signal conditioning in electrically noisy, thermally demanding, and space-constrained embedded systems.

FAQ

What is the maximum operating temperature for the 74HC14DTR2G?

The 74HC14DTR2G is rated for continuous operation from –55 °C to +125 °C across all package types, including the TSSOP-14 variant. This full industrial temperature range is validated per JEDEC JESD22-A108 and applies to both DC and AC specifications in the official onsemi datasheet revision 1. The 74HC14DTR2G maintains guaranteed hysteresis and propagation delay performance throughout this range.

Can the 74HC14DTR2G drive a 50 pF capacitive load at 6 V supply?

Yes, the 74HC14DTR2G is fully characterized for CL = 50 pF in its AC specifications: at 6 V, t_PLH/t_PHL is 13 ns max and t_TLH/t_THL is 19 ns max under these conditions. These values include probe and jig capacitance per the test setup in Figure 2 of the datasheet, confirming the 74HC14DTR2G delivers stable timing into standard logic bus loads.

Is the 74HC14DTR2G pin-compatible with the 74LS14?

Yes, the 74HC14DTR2G shares identical pinout and logic function with the 74LS14, as explicitly stated in the datasheet: "The 74HC14 is identical in pinout to the LS14, LS04 and the HC04." However, note that the 74HC14DTR2G requires no pull-up resistors for LSTTL compatibility and operates over a wider voltage range (2.0–6.0 V vs. 4.75–5.25 V).

Does the 74HC14DTR2G require external pull-up resistors on inputs?

No, the 74HC14DTR2G inputs are CMOS-compatible and do not require external pull-ups for proper logic operation. Pull-up resistors are only needed if interfacing with open-collector LSTTL sources - a design choice, not a requirement. Unused inputs must be tied to V_CC or GND; floating inputs are prohibited per datasheet guidance.

What is the typical power dissipation of the 74HC14DTR2G at 5 V and 1 MHz?

At V_CC = 5.0 V and f = 1 MHz with no external load, dynamic power is calculated using CPD = 22 pF: PD = CPD × V_CC² × f = 22×10⁻¹² × 25 × 10⁶ ≈ 0.55 mW per inverter, or ~3.3 mW for all six channels. Quiescent ICC remains ≤40 µA, contributing negligible static power. Total typical dissipation stays well below the TSSOP-14 derated limit of 450 mW.