Texas Instruments SN74ALVCH162832GR

Overview

SN74ALVCH162832GR from Texas Instruments is a 1-bit-to-4-bit address register/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It functions as either a transparent buffer (SEL = high) or edge-triggered D-type register (SEL = low), features integrated 26-Ω series output resistors, bus-hold on all data inputs, and supports up to 150-MHz clock frequency in memory-addressing applications.

For engineers reviewing the SN74ALVCH162832GR datasheet, SN74ALVCH162832GR pinout, SN74ALVCH162832GR application, or SN74ALVCH162832GR equivalent, key selection criteria include dual-mode operation (buffer/register), independent OE1/OE2 control of seven-output groups each, 3.6-V absolute maximum rating, latch-up immunity >250 mA, and TSSOP-64 (DGG) package compatibility with high-density PCB layouts.

Technical Context

This device implements a configurable interface between a single-bit address bus and four parallel memory banks. Its dual operational modes are controlled solely by the SEL input, while CLK edge-triggering and asynchronous 3-state enable via OE1/OE2 allow precise timing coordination and bus isolation without external components.

The internal architecture integrates bus-hold circuitry on all A-inputs (eliminating external pull resistors), on-chip 26-Ω series termination per output (reducing signal overshoot/undershoot), and independent output-enable logic that does not interfere with register storage - enabling data retention or update during high-impedance output states.

Key Specifications

Pinout & Package

TSSOP-64 (DGG) package: 12.6 mm × 13.9 mm × 1.2 mm body, 0.5-mm lead pitch, gull-wing leads, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH162832GR, SN74ALVCH162244GR omits register capability and clock control entirely, while SN74LVC16373ADGGR trades edge-triggered precision and bus-hold robustness for greater output current - making SN74ALVCH162832GR uniquely suited for synchronous, noise-immune address distribution in compact layouts.

Availability

SN74ALVCH162832GR is available at Aetrix Electronics and suitable for memory subsystem design, industrial PLC backplanes, DDR SDRAM interface development, and FPGA-based embedded systems requiring stable component supply across extended temperature ranges.

Supply support for SN74ALVCH162832GR 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, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74ALVCH162832GR belongs to TI's Widebus™ family of advanced low-voltage CMOS logic devices, engineered specifically for high-speed, low-power address and data path management in memory-rich embedded systems.

FAQ

What is the primary function of the SN74ALVCH162832GR?

The SN74ALVCH162832GR is a 1-bit-to-4-bit address register/driver with 3-state outputs. It operates in two modes: as a transparent buffer (when SEL = high) or an edge-triggered D-type register (when SEL = low). Its core purpose is to distribute or latch address signals across four parallel memory banks while providing bus-hold protection and integrated output termination - all within a single TSSOP-64 package.

Does the SN74ALVCH162832GR require external pull-up or pull-down resistors on its A inputs?

No. The SN74ALVCH162832GR includes active bus-hold circuitry on all A inputs, which maintains a valid logic state on undriven or floating inputs. This eliminates the need for external pull-up or pull-down resistors - simplifying design, reducing BOM cost, and improving reliability in hot-swap or modular systems where connectors may be temporarily unseated.

How does the SN74ALVCH162832GR handle power-up and power-down sequencing?

To ensure outputs remain in high-impedance during power transitions, OE1 and OE2 should be tied to V_CC through a pull-up resistor (minimum value determined by driver sink capability). The SN74ALVCH162832GR itself has no internal power-on reset; however, its bus-hold inputs and 3-state outputs prevent undefined states on the address bus during ramp-up/down - critical for preventing spurious memory accesses in systems with asymmetric power sequencing.

What is the significance of the 26-Ω series resistors integrated into the SN74ALVCH162832GR outputs?

The SN74ALVCH162832GR integrates 26-Ω series resistors on every output to dampen signal reflections caused by impedance mismatches on PCB traces. This reduces overshoot and undershoot without requiring discrete termination components - directly lowering layout complexity, saving board space, and improving signal integrity in high-frequency address routing (up to 150 MHz), especially in dense memory subsystems.

Can the SN74ALVCH162832GR operate reliably at 1.65 V V_CC?

Yes. The SN74ALVCH162832GR is fully specified for operation from 1.65 V to 3.6 V V_CC. At 1.65 V, it delivers guaranteed VOL ≤ 0.45 V (I_OL = 2 mA) and VOH ≥ 1.2 V (I_OH = –2 mA), with setup time t_su = 2 ns and propagation delay t_pd = 4.7 ns - enabling interoperability with ultra-low-voltage microcontrollers and FPGAs while maintaining timing margin in battery-powered applications.