Texas Instruments SN74LV139ANSRE4

Overview

SN74LV139ANSRE4 from Texas Instruments is a dual 2-line-to-4-line decoder/demultiplexer operating from 2 V to 5.5 V, with 7.5 ns maximum propagation delay at 5 V, mixed-mode voltage interface support, and I_off partial-power-down capability. It serves as a high-speed address decoder in memory subsystems and data-routing logic for industrial control and instrumentation.

For engineers reviewing the SN74LV139ANSRE4 datasheet, SN74LV139ANSRE4 pinout, SN74LV139ANSRE4 application, or SN74LV139ANSRE4 equivalent, key selection factors include its dual-channel enable architecture, 16-pin SOP (NS) package compatibility, guaranteed t_pd ≤ 7.5 ns at 5 V, and operation across automotive-grade temperature range (–40°C to +85°C).

Technical Context

The SN74LV139ANSRE4 integrates two independent 2-to-4 decoders sharing no internal logic-each with dedicated active-low enable (1G/2G), two address inputs (A0/A1), and four active-low decoded outputs (Y0–Y3). Its fully buffered inputs present only one normalized load, minimizing fanout burden on upstream drivers.

It supports mixed-voltage operation: inputs tolerate 0–5.5 V regardless of V_CC, enabling seamless interfacing between 3.3 V controllers and 5 V peripherals. The I_off feature disables outputs during power-down, preventing back-current flow when V_CC = 0 V.

Key Specifications

Pinout & Package

SOP (NS) package: 16-pin surface-mount, body size 10.2 mm × 5.30 mm, 1.27 mm pitch, 2.00 mm max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual decoder/demultiplexer applications.

Compared with SN74HC139DR and 74LVC139APW, the SN74LV139ANSRE4 uniquely balances 2–5.5 V flexibility, 7.5 ns speed at 5 V, and I_off-enabled power sequencing-making it optimal for mixed-rail industrial controllers where reliability and timing margin are prioritized over minimal package size.

Availability

SN74LV139ANSRE4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and automotive diagnostic modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LV139ANSRE4 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 logic solutions, with decades of experience in high-reliability industrial and automotive components.

The SN74LV139A product line delivers low-voltage, high-speed decoding for memory and data-path applications, designed specifically to reduce system-level propagation delay in real-time control and instrumentation systems.

FAQ

What is the maximum propagation delay of the SN74LV139ANSRE4 at 3.3 V?

The SN74LV139ANSRE4 has a maximum propagation delay of 13 ns at V_CC = 3.3 V with 15 pF load, as specified in Section 4.7 of the official TI datasheet. This value applies to transitions from address or enable inputs to any Y output, ensuring predictable timing in 3.3 V logic domains. The SN74LV139ANSRE4 maintains consistent performance across its full operating voltage range.

Does the SN74LV139ANSRE4 support partial-power-down mode?

Yes, the SN74LV139ANSRE4 supports partial-power-down mode via its I_off circuitry. When V_CC = 0 V, input/output leakage remains ≤ 5 μA, preventing damaging back-current flow through powered-down sections. This feature is explicitly validated in Section 4.5 of the TI datasheet and makes the SN74LV139ANSRE4 suitable for hot-swap and multi-rail power architectures.

What package type does the SN74LV139ANSRE4 use?

The SN74LV139ANSRE4 uses a 16-pin SOP (Small Outline Package) with drawing code NS, measuring 10.2 mm × 7.8 mm overall and 10.2 mm × 5.30 mm body size. It features 1.27 mm lead pitch and 2.00 mm maximum height, as documented in TI's Mechanical, Packaging, and Orderable Information section. This package is distinct from SOIC (D), SSOP (DB), or TSSOP (PW) variants.

Can the SN74LV139ANSRE4 interface between 3.3 V and 5 V logic domains?

Yes, the SN74LV139ANSRE4 supports mixed-mode voltage operation: its inputs accept 0–5.5 V signals regardless of V_CC level, enabling direct connection of a 3.3 V microcontroller to a 5 V peripheral address bus. This capability is confirmed in the "Features" and "Recommended Operating Conditions" sections of the TI datasheet and requires no external level-shifting circuitry.

What is the operating temperature range for the SN74LV139ANSRE4?

The SN74LV139ANSRE4 is rated for operation from –40°C to +85°C, as stated in Section 4.3 ("Recommended Operating Conditions") of the TI datasheet. This extended industrial temperature range qualifies the device for deployment in harsh environments such as factory automation, outdoor test equipment, and under-hood automotive diagnostics-without derating or thermal mitigation.