Texas Instruments SN74ALVCH162830GR

Overview

SN74ALVCH162830GR from Texas Instruments is a 1-bit to 2-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, integrated 26-Ω series output resistors, and dual enable controls (OE1/OE2) for independent channel gating-used in high-density memory address expansion and multiplexed bus systems.

For engineers reviewing the SN74ALVCH162830GR datasheet, SN74ALVCH162830GR pinout, SN74ALVCH162830GR application, or SN74ALVCH162830GR equivalent, key selection criteria include its dual-output per input architecture, bus-hold elimination of external biasing, 12-mA sink capability, and TSSOP-80 package compatibility with space-constrained PCB layouts.

Technical Context

This device implements a widebus-compatible address translation function: each of 18 input bits (A1–A18) drives two complementary outputs (1Yn and 2Yn), enabling 1:2 fanout for address line duplication or differential signaling prep. Control logic uses active-low OE1/OE2 to independently disable either output bank.

Bus-hold circuitry maintains stable logic states on un-driven A-inputs without external resistors, while internal 26-Ω series termination minimizes signal overshoot/undershoot at up to 10-MHz switching rates. Power-up/down high-impedance safety requires OE tied to V_CC via pullup resistor.

Key Specifications

Pinout & Package

TSSOP-80 (DBB) package: 12.0 mm × 6.1 mm footprint, 1.2 mm max height, 0.5-mm pitch, exposed thermal pad for enhanced heat dissipation in dense layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH162830GR, SN74ALVCH162244GR requires external termination and pull resistors to match functionality, while SN74LVC16244ADGGR omits bus-hold and narrow supply support-making SN74ALVCH162830GR uniquely suited for compact, mixed-voltage, hot-plug-capable address expansion.

Availability

SN74ALVCH162830GR is available at Aetrix Electronics and suitable for memory subsystem design, industrial backplane interfaces, and low-power embedded address routing requiring stable component supply and long-term manufacturability.

Supply support for SN74ALVCH162830GR 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 interface and signal-path ICs.

The SN74ALVCH162830GR belongs to TI's Widebus™ family-designed specifically for high-density, low-voltage address and data bus expansion in memory, networking, and industrial control systems.

FAQ

What is the primary function of the SN74ALVCH162830GR?

The SN74ALVCH162830GR is a 1-bit-to-2-bit address driver that duplicates each of 18 input signals into two independent 3-state outputs (1Yn and 2Yn), enabling simultaneous driving of dual memory banks or peripherals. Its bus-hold and integrated 26-Ω series resistors eliminate external components, making it ideal for compact, reliable address expansion in SN74ALVCH162830GR-based systems.

How does the bus-hold feature work in the SN74ALVCH162830GR?

The SN74ALVCH162830GR incorporates active bus-hold circuitry on all A-inputs (A1–A18), which detects and maintains the last-valid logic state when inputs float-eliminating the need for external pullup or pulldown resistors. This prevents undefined states during hot-swap events or partial population, enhancing system robustness without increasing BOM cost or PCB area in SN74ALVCH162830GR implementations.

What is the recommended power-up sequence for the SN74ALVCH162830GR?

To ensure high-impedance outputs during power-up, OE1 and OE2 must be held high before V_CC stabilizes. TI recommends tying both enables to V_CC through a pullup resistor (minimum value determined by driver sink capability). This prevents unintended output activation and bus contention-critical for safe initialization in any SN74ALVCH162830GR application.

Can the SN74ALVCH162830GR operate at 1.8 V and still drive standard 3.3-V CMOS loads?

Yes-the SN74ALVCH162830GR operates from 1.65 V to 3.6 V and delivers VOH ≥ 1.2 V at 1.65 V (IOH = –2 mA), meeting VIH thresholds of most 3.3-V CMOS devices. Its wide V_CC range and rail-to-rail output swing make it suitable for level-shifted interfacing, provided load capacitance and timing margins are verified in the final SN74ALVCH162830GR design.

Does the SN74ALVCH162830GR require external series resistors for EMI control?

No-the SN74ALVCH162830GR integrates 26-Ω series resistors on all outputs (1Yn/2Yn), specifically designed to suppress overshoot and undershoot in high-speed address paths. This eliminates the need for discrete termination resistors, saving PCB space and reducing signal integrity risk-confirmed by TI's characterization across 1.8-V, 2.5-V, and 3.3-V operation in the SN74ALVCH162830GR datasheet.