Texas Instruments SN74ALVCH16344DGGR

Overview

SN74ALVCH16344DGGR from Texas Instruments is a 1-bit-to-4-bit address driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features bus-hold circuitry on all data inputs, eliminating external pullup/pulldown resistors, and supports four independent memory address banks in high-density memory subsystems.

For engineers reviewing the SN74ALVCH16344DGGR datasheet, SN74ALVCH16344DGGR pinout, SN74ALVCH16344DGGR application, or SN74ALVCH16344DGGR equivalent, key selection criteria include its 56-pin TSSOP (DGG) package, ±24-mA output drive at 3.0 V, bus-hold input stabilization, and OE-controlled 3-state output enable/disable timing (t_dis = 4 ns min at 2.7 V).

Technical Context

This device implements eight independent 1-bit-to-4-bit address translation channels, each with dedicated output-enable (OE1–OE4) control and bidirectional bus-hold on all B-side inputs. Each channel drives four parallel outputs (B1–B4) from a single A-side input, enabling compact address expansion without external logic.

It operates across industrial temperature range (–40°C to +85°C), meets JESD 17 latch-up immunity (>250 mA), and provides ESD protection per JESD 22 (2000-V HBM, 200-V MM). The bus-hold current specification (±75 µA at 3.0 V) ensures stable logic levels on floating address lines during power sequencing or standby.

Key Specifications

Pinout & Package

SN74ALVCH16344DGGR is housed in a 56-pin Thin Shrink Small Outline Package (TSSOP-DGG), 13.9 mm × 6.1 mm footprint, 1.2 mm max height, RoHS-compliant, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar address driver applications.

Compared with SN74ALVCH16344DGGR, SN74ALVCH16345DGGR removes bus-hold but retains pin compatibility, while SN74LVC16344DGGR extends voltage range to 5.5 V at the cost of input stability and higher parasitic capacitance-making SN74ALVCH16344DGGR optimal for noise-sensitive, low-voltage, high-reliability address expansion.

Availability

SN74ALVCH16344DGGR is available at Aetrix Electronics and suitable for memory address expansion, industrial PLC I/O mapping, embedded flash memory interface, and multi-bank SRAM controller applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for SN74ALVCH16344DGGR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The SN74ALVCH16344DGGR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically for high-speed, low-voltage address and data bus interface applications in memory-rich embedded systems.

FAQ

What is the recommended power-up sequence for SN74ALVCH16344DGGR to ensure high-impedance outputs?

To guarantee high-impedance outputs during power-up, OE pins must be held high before V_CC reaches 1.5 V. TI recommends tying each OE to V_CC via a pullup resistor; the minimum value is determined by the driver's current-sinking capability, typically ≥10 kΩ for standard conditions. This prevents unintended output activation that could cause bus contention in systems using SN74ALVCH16344DGGR for memory address routing.

Does SN74ALVCH16344DGGR support mixed-voltage operation between A-side and B-side interfaces?

No-SN74ALVCH16344DGGR does not support true mixed-voltage I/O. All inputs and outputs operate referenced to the same V_CC supply (1.65 V to 3.6 V). While A-side inputs accept logic levels compatible with lower-voltage sources (e.g., 1.8-V MCU), the B-side outputs swing between 0 V and V_CC, so interfacing with 5-V logic requires level-shifting. The device itself has no dual-supply capability; SN74ALVCH16344DGGR is a single-supply address driver.

How does the bus-hold circuitry in SN74ALVCH16344DGGR affect PCB layout and termination strategy?

The bus-hold circuitry in SN74ALVCH16344DGGR actively maintains valid logic states on all 32 B-side inputs without external resistors, eliminating the need for pullup/pulldown networks. This simplifies layout by removing 32 discrete components and associated traces. However, TI explicitly warns against combining bus-hold with external resistors, as it may cause excessive current draw or logic instability. Layout should prioritize short, well-terminated traces only for high-speed A-side inputs; B-side nets can remain unterminated due to built-in hold functionality.

What is the maximum clock/data toggle rate supported by SN74ALVCH16344DGGR in address expansion mode?

SN74ALVCH16344DGGR does not operate on a clock signal-it is asynchronous. Its maximum usable toggle rate is determined by propagation delay (t_pd = 1.4 ns min at 1.8 V) and output disable time (t_dis = 4 ns min at 2.7 V). For reliable address settling, the minimum cycle time is ~10 ns, supporting up to 100 MHz effective address update rates. This makes SN74ALVCH16344DGGR suitable for high-speed memory controllers where deterministic, low-skew address distribution is critical.

Can SN74ALVCH16344DGGR be used in automotive applications requiring AEC-Q100 qualification?

No-SN74ALVCH16344DGGR is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +85°C) and intended for commercial and industrial applications. TI offers automotive-grade equivalents (e.g., SN74ALVCH16344QDGGR) with extended temperature range (–40°C to +125°C), enhanced reliability testing, and full AEC-Q100 compliance. For automotive use, SN74ALVCH16344DGGR must be replaced with its Q-grade variant; the base SN74ALVCH16344DGGR is not approved for safety-critical vehicle systems.