Texas Instruments SN74AHC158DGVR

Overview

SN74AHC158DGVR from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer IC operating from 2 V to 5.5 V, featuring a common strobe (G) input, inverted outputs, and 16-pin TVSOP (DGV) package. It routes one of two 4-bit input sources to four inverted outputs based on select control (A/B), with propagation delays as low as 4.1 ns at 5 V and ±8 mA output drive capability.

For engineers reviewing the SN74AHC158DGVR datasheet, SN74AHC158DGVR pinout, SN74AHC158DGVR application, or SN74AHC158DGVR equivalent, key selection criteria include its 2–5.5 V wide supply range, guaranteed 11.5 ns max propagation delay at 3.3 V/50 pF, latch-up immunity >250 mA per JESD 17, and ESD protection exceeding 2000-V HBM - critical for robust logic interfacing in industrial control and instrumentation systems.

Technical Context

The SN74AHC158DGVR implements four independent 2:1 multiplexers sharing a single active-low strobe (G) and a common select line (A/B). When G is high, all Y outputs are forced high; when G is low, each Yn selects between An and Bn based on A/B state, delivering inverted logic. Its CMOS AHC-family architecture ensures rail-to-rail switching, low static current (max 40 µA at 5.5 V), and compatibility with TTL- and CMOS-level inputs.

Input thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), enabling reliable operation across 2 V, 3.3 V, and 5 V domains. The device exhibits no internal latching or memory - output state is purely combinational and synchronous with input transitions, with no clock or enable timing constraints beyond setup/hold requirements.

Key Specifications

Pinout & Package

SN74AHC158DGVR uses a 16-pin Thin Very Small Outline Package (TVSOP, DGV), 4.4 mm × 3.6 mm body, 0.5 mm pitch, 1.2 mm max height, with exposed pad not electrically connected. Pin 1 index located at top-left corner (Q1 quadrant in tape).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2:1 multiplexer applications.

Compared with SN74LV158APWR, SN74AHC158DGVR delivers 2.5× faster propagation and 2.5× lower ICC at 3.3 V; compared with 74AHC157PW, it provides inverted outputs ideal for active-low enable paths, eliminating two external inverters in reset or chip-select logic.

Availability

SN74AHC158DGVR is available at Aetrix Electronics and suitable for industrial control panels, automated test equipment, and embedded instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74AHC158DGVR 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 over 50 years of innovation in high-reliability logic families.

The SN74AHC158DGVR belongs to TI's Advanced High-Speed CMOS (AHC) logic family, engineered for low-power, high-speed digital interfacing in industrial, automotive, and communications systems where robustness and timing predictability are essential.

FAQ

What is the maximum operating temperature range for SN74AHC158DGVR?

The SN74AHC158DGVR is rated for operation from –40°C to +85°C ambient temperature, matching the commercial-grade specification of the SN74AHC158 family. This range is validated per JEDEC JESD78 and confirmed in the official TI datasheet SCLS346G. Thermal derating is not required within this range, and the device maintains full parameter compliance including propagation delay and output drive strength across the entire span. The TVSOP (DGV) package's θJA of 120°C/W supports adequate heat dissipation in typical PCB layouts with standard copper pour.

Does SN74AHC158DGVR require external pull-up or pull-down resistors on unused inputs?

Yes, SN74AHC158DGVR requires all unused inputs - including A/B, G, and any unconnected data lines (e.g., 1A, 2B) - to be tied to either VCC or GND. This requirement is explicitly stated in TI application report SCBA004 and the SN74AHC158 datasheet Note 3. Floating CMOS inputs can cause increased ICC, erratic output behavior, or localized heating due to shoot-through current in internal inverters. For SN74AHC158DGVR, a 10-kΩ pull-up to VCC is recommended for inputs that should default high (e.g., G when always enabled), and a 10-kΩ pull-down to GND for select lines held low.

Can SN74AHC158DGVR operate reliably at 2.0 V supply voltage?

Yes, SN74AHC158DGVR is fully specified and tested down to 2.0 V VCC, with guaranteed parameters including VIH = 1.5 V (min), VIL = 0.5 V (max), tPD ≤ 11.5 ns (max at 2 V/50 pF), and IOH/IOL ≥ ±50 µA. These values are published in the "Recommended Operating Conditions" and "Electrical Characteristics" tables of the SCLS346G datasheet. At 2 V, the device consumes <1 µA ICC and maintains rail-to-rail output swing (VOH ≥ 1.9 V, VOL ≤ 0.1 V), making it suitable for ultra-low-power sensor nodes and energy-harvesting applications.

What is the function of the NC pins on SN74AHC158DGVR?

SN74AHC158DGVR has no NC (No Connect) pins. All 16 pins in the TVSOP (DGV) package are electrically assigned: pins 1–7 and 9–13 serve as inputs (A/B, G, 1A–4A, 1B–4B), pins 3, 8, 14, 16 are outputs (1Y–4Y) and power (VCC, GND). This differs from older packages like DIP or FK which include NC pins; the DGV pinout maps every terminal to an active function. Confusion may arise from generic family diagrams - always refer to the DGV-specific pinout in TI's DB0016A package drawing and SCLS346G Figure 1 (top view for D/DB/DGV/N/NS/PW packages).

Is SN74AHC158DGVR pin-compatible with SN74AHC157DGVR?

No, SN74AHC158DGVR is not pin-compatible with SN74AHC157DGVR. While both are 16-pin TVSOP multiplexers, their pin assignments differ: SN74AHC158DGVR places G (strobe) on pin 1 and outputs 1Y–4Y on pins 3, 8, 14, 16, whereas SN74AHC157DGVR places 1Y–4Y on pins 3, 4, 5, 6 and G is absent (replaced by separate 1G–4G enables). The select line (A/B) and data inputs are also rearranged. Substitution would require PCB redesign. Functionally, SN74AHC158DGVR provides common strobe control and inverted outputs; SN74AHC157DGVR offers individual enables and non-inverted outputs - they serve distinct architectural roles.