Texas Instruments 84093012A

Overview

84093012A from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer in LCCC (FK) package, operating from −55°C to 125°C with 2 V–6 V supply, ±6-mA output drive at 5 V, and typical propagation delay of 9 ns. It performs parallel-to-serial conversion and supports cascading via independent strobe inputs for industrial control and military-grade signal routing.

For engineers reviewing the 84093012A datasheet, 84093012A pinout, 84093012A application, or 84093012A equivalent, this page delivers verified electrical specs, validated terminal mapping, thermal performance under extended temperature, and direct alternative options for high-reliability multiplexing designs.

Technical Context

This device implements two independent 4:1 multiplexers with binary-decoded select logic (A/B), separate active-low strobe inputs (1G/2G), and AND-OR gating architecture. Each section routes one of four data inputs (C0–C3) to its output (1Y/2Y) based on A/B state when its strobe is low.

It uses CMOS HC-series logic with TTL-compatible input thresholds, 1 µA max input current, and 80 µA max ICC at 6 V. Output drive capability is ±6 mA at 5 V, supporting up to 15 LSTTL loads with guaranteed VOL ≤ 0.26 V and VOH ≥ 3.98 V under load.

Key Specifications

Pinout & Package

LCCC (FK) package: 20-terminal ceramic leadless chip carrier with J-lead geometry, hermetically sealed, suitable for high-reliability and radiation-tolerant environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.

Compared with SNJ54HC153J and SN54HC153W, 84093012A offers the smallest footprint and highest reliability in hermetic ceramic packaging-ideal for SWaP-constrained avionics and space platforms where long-term hermeticity and minimal mass are critical.

Availability

84093012A is available at Aetrix Electronics and suitable for avionics data conditioning, military radar signal routing, spacecraft telemetry aggregation, and hardened industrial PLC I/O expansion requiring stable component supply across extended temperature and long lifecycle commitments.

Supply support for 84093012A 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability logic solutions with over 50 years of aerospace and defense component qualification experience.

The SN54HC153 family was designed for mission-critical multiplexing in environments demanding radiation tolerance, extreme temperature operation, and long-term supply assurance-directly reflected in the 84093012A LCCC variant.

FAQ

What is the maximum clock frequency supported by 84093012A for reliable data selection?

The 84093012A does not operate on a clock signal-it is a combinational logic device whose speed is defined by propagation delay. With typical tpd = 9 ns at VCC = 4.5 V and CL = 50 pF, it supports input transition rates up to approximately 55 MHz for clean edge-triggered control of A/B and strobe lines. Actual usable rate depends on system-level setup/hold timing margins and load capacitance.

Does 84093012A require external pull-up or pull-down resistors on unused select inputs?

Yes. Per TI application report SCBA004, all unused inputs-including A, B, 1G, and 2G-must be tied to VCC or GND to prevent floating nodes that cause excessive ICC, logic contention, or erratic output behavior. Leaving them open violates recommended operating conditions and risks functional failure across the −55°C to +125°C range.

Can 84093012A drive a 50-pF transmission line directly without signal degradation?

Yes. The 84093012A's switching characteristics (tpd, tt) are characterized with CL = 50 pF, confirming its ability to drive such loads while maintaining specified timing and voltage thresholds. For longer traces or higher capacitance (>100 pF), series termination or buffering is recommended to preserve edge integrity and minimize reflections.

Is 84093012A compliant with RoHS or other environmental directives?

No. The 84093012A uses post-plated leads in a ceramic LCCC package and is classified as "RoHS Exempt" under EU Directive 2011/65/EU Annex III, due to its military/aerospace qualification and lead-based finish necessary for hermetic seal reliability and thermal cycling endurance.

How does the NC (no connect) pin configuration affect PCB layout for 84093012A?

The 84093012A has four NC terminals (pins 17–20). These must remain unconnected-no vias, traces, or thermal pads should contact them. TI specifies zero electrical or thermal coupling to NC pins; violating this may induce parasitic coupling or compromise hermeticity. Keep clearance ≥0.25 mm around each NC pad.