Nexperia USA Inc. HEF4069UBTT,112

Overview

HEF4069UBTT from Nexperia is a hex unbuffered CMOS inverter IC operating across 3.0 V to 15.0 V supply, delivering symmetrical output drive (±4.2 mA at 15 V), propagation delays as low as 15 ns (15 V, CL = 50 pF), and full static operation over -40 °C to +125 °C. It integrates input clamp diodes enabling safe interfacing to voltages exceeding VDD via current-limiting resistors, and is commonly deployed in crystal oscillator circuits and relaxation oscillators.

For engineers reviewing the HEF4069UBTT datasheet, HEF4069UBTT pinout, HEF4069UBTT application, or HEF4069UBTT equivalent, key selection considerations include its unbuffered inverter topology for analog gain and oscillator biasing, wide-voltage rail compatibility, TSSOP14 thermal derating profile (7.3 mW/K above 81 °C), and JEDEC JESD13-B compliance with HBM >2000 V and CDM >1000 V ESD robustness.

Technical Context

The HEF4069UBTT implements six independent unbuffered inverters-each consisting of a single CMOS inverter stage without internal buffering-enabling direct use as analog amplifiers when biased in the linear region (e.g., via high-value feedback resistor). Its transfer characteristics exhibit supply-dependent voltage gain (up to ~75× at 15 V) and transconductance (up to 10 mA/V), making it suitable for discrete oscillator and signal conditioning functions.

Unlike buffered logic gates, this device lacks internal level-shifting or drive enhancement stages; its output impedance and transition times scale directly with load capacitance and supply voltage per extrapolation formulas (e.g., tPHL = 7 ns + 0.16 ns/pF × CL at 15 V). Input clamp diodes allow overvoltage tolerance but require external current limiting for VI < VSS or VI > VDD + 0.5 V.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14-lead, 4.4 mm body width, 0.65 mm pitch; optimized for space-constrained industrial PCBs with improved thermal dissipation vs. SO14.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unbuffered inverter applications.

Compared with CD4069UBM96 and 74HC04PW,118, the HEF4069UBTT uniquely supports analog oscillator design, 15 V operation, and extended-temperature reliability-making it irreplaceable in crystal timing and relaxation oscillator applications requiring thermal resilience and overvoltage interface capability.

Availability

HEF4069UBTT is available at Aetrix Electronics and suitable for industrial timing circuits, sensor interface modules, and embedded oscillator designs requiring stable component supply across extended temperature ranges and diverse voltage rails.

Supply support for HEF4069UBTT 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, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The HEF4069UBTT belongs to Nexperia's legacy CMOS logic portfolio, designed specifically for robust, wide-supply-voltage oscillator and interface applications where unbuffered inverter behavior, thermal resilience, and overvoltage tolerance are critical.

FAQ

Can HEF4069UBTT be used as an analog amplifier?

Yes-its unbuffered CMOS structure allows stable linear-region biasing. When configured with a high-value feedback resistor (e.g., 330 kΩ per Fig. 11), it delivers controllable voltage gain (25×–75×) tunable via VDD. This is validated in the datasheet's transfer characteristics (Fig. 6) and analog amplifier test setup (Fig. 11–13), confirming suitability for sensor signal conditioning without external op-amps.

What is the maximum safe input voltage for HEF4069UBTT?

The absolute maximum input voltage is VDD + 0.5 V (per Table 3). However, the integrated clamp diodes permit safe operation beyond this limit when series current-limiting resistors are used-e.g., to interface 24 V signals. The clamp diodes conduct when VI < VSS − 0.5 V or VI > VDD + 0.5 V, limiting input current to ±10 mA (Table 3), so resistor value must ensure current stays within that bound.

How does thermal derating work for the TSSOP14 package?

For the HEF4069UBTT in SOT402-1 (TSSOP14), total power dissipation (Ptot) derates linearly at 7.3 mW/K above 81 °C. At 125 °C ambient, Ptot drops to 500 mW − (125 − 81) × 7.3 ≈ 179 mW. This requires careful thermal design-e.g., copper pour under pin 7 (VSS) and pin 14 (VDD)-and limits continuous output loading in high-temp industrial enclosures.

Is HEF4069UBTT pin-compatible with other 4069 variants?

Yes-HEF4069UBTT shares identical pinout (Fig. 3) and functional diagram (Fig. 1) with all HEF4069UB variants (e.g., HEF4069UBT in SO14) and industry-standard CD4069UB devices. All use the same 14-pin arrangement: inputs on odd pins (1,3,5,9,11,13), outputs on even pins (2,4,6,8,10,12), VSS on pin 7, and VDD on pin 14-ensuring drop-in replacement across packages and manufacturers.