Nexperia USA Inc. HEF40098BT,653

Overview

HEF40098BT,653 from Nexperia is a hex inverting buffer IC with dual 3-state enable control (1OE and 2OE), delivering six active-low buffered outputs across two independent groups (1Y0–1Y3 and 2Y0–2Y1). It operates from 3 V to 15 V over −40 °C to +85 °C, features symmetrical output drive (±24 mA at 15 V), and supports static logic-level translation in bus interface and address latching applications.

For engineers reviewing the HEF40098BT,653 datasheet, HEF40098BT,653 pinout, HEF40098BT,653 application, or HEF40098BT,653 equivalent, this device serves as a voltage-tolerant, low-power logic buffer for bidirectional bus isolation, memory address gating, and legacy CMOS system interfacing where independent 4-bit/2-bit output control is required.

Technical Context

The HEF40098BT,653 implements two independent 3-state inverting buffer banks: four outputs (1Y0–1Y3) are enabled by active-low 1OE, while two outputs (2Y0–2Y1) respond to active-low 2OE - enabling selective bus segment control without shared enable logic. Unused inputs must be tied to VDD, VSS, or another input to prevent floating states.

Its static CMOS architecture ensures zero static current draw at steady state, and propagation delays scale predictably with supply voltage (e.g., tPHL = 22 ns + 0.06 ns/pF·CL at VDD = 15 V), supporting reliable timing in mixed-voltage systems up to 15 V. Input transition rate limits (e.g., 0.08 ns/V at 10 V) define minimum edge slew requirements for valid switching.

Key Specifications

Pinout & Package

HEF40098BT,653 is housed in a 16-lead SOIC package (SOT109-1), 3.9 mm body width, with standard JEDEC-compliant lead pitch and gull-wing terminations suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverting buffer with 3-state applications.

Compared with 74HC4050D,653 and CD40107BE, the HEF40098BT,653 uniquely delivers inverting logic, dual independent 3-state control, and full 3–15 V operation - making it irreplaceable in applications requiring voltage-flexible, polarity-aware, and granularly gated bus interfaces.

Availability

HEF40098BT,653 is available at Aetrix Electronics and suitable for industrial control backplanes, legacy memory subsystems, programmable logic interfaces, and voltage-flexible bus isolation requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF40098BT,653 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, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The HEF40098BT,653 belongs to Nexperia's legacy CMOS logic portfolio, designed specifically for voltage-flexible, low-power bus interface and signal conditioning in industrial and legacy embedded systems where robustness and wide supply range are critical.

FAQ

What is the maximum capacitive load the HEF40098BT,653 can drive while maintaining specified timing?

The HEF40098BT,653 is characterized up to 50 pF load capacitance per output, with propagation delays extrapolated using formulas like tPHL = 22 ns + (0.06 ns/pF)·CL at VDD = 15 V. Driving >50 pF increases delay nonlinearly and may exceed timing budgets; external buffering is recommended beyond this limit.

Can unused inputs be left floating?

No. Unused inputs must be tied to VDD, VSS, or another driven input to prevent undefined logic states, increased power consumption, and potential oscillation. Floating CMOS inputs draw excessive current and compromise noise immunity and device reliability.

Does the HEF40098BT,653 support hot insertion or live bus swapping?

No. The device lacks Ioff protection or power-off isolation; applying signals to inputs or outputs while VDD is unpowered risks latch-up or damage due to internal parasitic paths. Power sequencing must ensure VDD is stable before any I/O signals are applied.

How does the 3-state enable timing behave across supply voltages?

Enable/disable propagation delays (tPHZ, tPLZ, etc.) improve with higher VDD: tPHZ drops from 85 ns at 5 V to 30 ns at 15 V. This voltage-dependent speedup must be accounted for in timing-critical systems where OE signals switch across varying supply conditions.