Texas Instruments 8406201EA

Overview

8406201EA from Texas Instruments is a military-grade 3-line to 8-line decoder/demultiplexer in CDIP-16 package, operating across –55°C to +125°C. It features active-low outputs, three enable inputs (two low, one high), 15 ns typical propagation delay at 6 V, ±4-mA output drive at 5 V, and 80-µA maximum ICC. It is used in high-speed memory decoding and data-routing systems where deterministic timing and rugged thermal performance are required.

For engineers reviewing the 8406201EA datasheet, 8406201EA pinout, 8406201EA application, or 8406201EA equivalent, this page delivers verified functional modes, real-world timing behavior under load, thermal resistance metrics for harsh-environment PCB layout, and validated alternatives for radiation-tolerant or extended-temperature designs.

Technical Context

The 8406201EA implements a binary-select logic function with three address inputs (A, B, C) and three enable terminals (G1, G2A, G2B) that collectively determine which of eight outputs (Y0–Y7) is driven LOW. All outputs remain HIGH unless all enables are simultaneously asserted - G1 HIGH and both G2A/G2B LOW - satisfying the strict enable condition before decoding occurs.

Its CMOS architecture ensures rail-to-rail input thresholds, low static current (≤80 µA at VCC = 6 V), and balanced output drive capable of sinking 4 mA at 5 V while maintaining VOL ≤ 0.33 V. Propagation delay varies with supply voltage: 15 ns typical at 6 V, 38 ns max over full temperature range, and 46 ns max for SN54HC-grade operation at –55°C to +125°C.

Key Specifications

Pinout & Package

8406201EA uses a 16-pin Ceramic Dual In-line Package (CDIP-J) with 0.300-inch body width and through-hole mounting. Pin spacing is 0.100 inch; leads are tin-lead (SNPB) finished and non-RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-to-8 decoder applications.

Compared with 8406201EA, SN54HC138J offers identical functionality with streamlined logistics, while 8406201FA trades through-hole mountability for improved thermal dissipation in surface-mounted, high-reliability assemblies.

Availability

8406201EA is available at Aetrix Electronics and suitable for military computing, avionics subsystems, and industrial control applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 8406201EA 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 for industrial, automotive, and defense markets.

The 8406201EA belongs to TI's SN54HC logic family, engineered for extreme-environment operation with rigorous screening per MIL-PRF-38535 Class B requirements and designed for mission-critical decoding in aerospace and defense electronics.

FAQ

What is the operating temperature range of the 8406201EA?

The 8406201EA is rated for operation from –55°C to +125°C, meeting MIL-PRF-38535 Class B environmental specifications. This range is validated across all electrical parameters including propagation delay, output drive, and input thresholds, making it suitable for deployment in uncontrolled external enclosures or high-thermal-load chassis without derating.

Does the 8406201EA support 3.3-V logic interfaces?

Yes, the 8406201EA operates down to 2 V supply and maintains valid VIH/VIL thresholds at 3.3 V: VIH(min) = 2.31 V and VIL(max) = 0.99 V per Section 6.3 of the datasheet. Its CMOS inputs draw <1 µA, ensuring compatibility with 3.3-V microcontrollers without level shifters or pull-up resistors.

How does the enable logic work on the 8406201EA?

The 8406201EA requires G1 HIGH and both G2A and G2B LOW to activate decoding. If any enable is violated - e.g., G1 pulled LOW or either G2 input HIGH - all eight outputs (Y0–Y7) go HIGH regardless of A/B/C state. This triple-enable structure prevents partial decoding and supports cascaded architectures using unused enables as higher-order select lines.

Can the 8406201EA drive LEDs directly?

Yes, the 8406201EA can sink up to 4 mA per output at 5 V with VOL ≤ 0.33 V, making it suitable for direct low-side driving of indicator LEDs or small-signal segments in multiplexed displays. For higher-current loads like panel backlighting, an external transistor stage is recommended to avoid exceeding absolute maximum ratings.

What is the maximum propagation delay of the 8406201EA over temperature?

The maximum propagation delay for the 8406201EA is 46 ns (from enable to output) at VCC = 6 V and TA = –55°C to +125°C, per Section 6.11 "Switching Characteristics: SN54HC138". This value accounts for process, voltage, and temperature extremes and is guaranteed for timing-critical system integration.