Texas Instruments SN74ALVCH162344DL

Overview

SN74ALVCH162344DL from Texas Instruments is a 1-bit-to-4-bit address driver with 3-state outputs, designed for memory address expansion in 1.65-V to 3.6-V systems. It features ±12-mA output drive at 3.3 V, integrated 26-Ω series output resistors, bus-hold on all data inputs, and four independent OE controls (OE1–OE4). It is used to drive four separate memory locations from a single address line in high-density SRAM or Flash memory subsystems.

For engineers reviewing the SN74ALVCH162344DL datasheet, SN74ALVCH162344DL pinout, SN74ALVCH162344DL application, or SN74ALVCH162344DL equivalent, key selection criteria include voltage range compatibility (1.65–3.6 V), 4.4-ns max propagation delay at 3.3 V, 56-pin SSOP package footprint, bus-hold functionality eliminating external biasing, and per-bank 3-state control for flexible memory bank isolation.

Technical Context

The SN74ALVCH162344DL implements eight independent 1-bit-to-4-bit A-to-B drivers grouped into four banks (Bank 1: A1→B1–B4; Bank 2: A2→B5–B8; etc.), each with dedicated output-enable (OE) input. Each bank operates as a non-inverting buffer with 3-state outputs controlled by its respective OE signal.

It uses advanced ALVC logic with bus-hold circuitry on all B-inputs (B1–B32), eliminating need for external pullup/pulldown resistors. Output ports integrate 26-Ω series termination to suppress overshoot/undershoot without requiring external components - a design feature confirmed across all 32 output pins under 3.3-V operation.

Key Specifications

Pinout & Package

SN74ALVCH162344DL is housed in a 56-pin Shrink Small Outline Package (SSOP-DL), 13.9 mm × 7.4 mm body size, 0.5-mm lead pitch, 1.2-mm max height, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH162344DL, the GR and VR variants offer identical functionality but differ in thermal resistance, package dimensions, and assembly compatibility - DL remains optimal for through-hole-compatible prototyping, legacy SSOP layouts, and lower-volume tube-based procurement.

Availability

SN74ALVCH162344DL is available at Aetrix Electronics and suitable for SRAM expansion, Flash memory multiplexing, and memory-mapped I/O decoding requiring stable component supply, long-term lifecycle support, and consistent SSOP-DL packaging.

Supply support for SN74ALVCH162344DL 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 SN74ALVCH162344 belongs to TI's Widebus™ family of advanced low-voltage CMOS logic devices, engineered specifically for high-speed, low-power address and data bus interface applications in memory-rich embedded systems.

FAQ

What is the function of the OE1–OE4 pins on the SN74ALVCH162344DL?

The OE1–OE4 pins on the SN74ALVCH162344DL are active-low output-enable controls, each assigned to one of four independent 1-bit-to-4-bit driver banks. OE1 enables or disables outputs 1B1–1B4, OE2 controls 2B1–2B4, and so on. When asserted low, the corresponding bank drives its B outputs according to the A input; when high, all four outputs enter high-impedance state. This allows selective memory bank activation without affecting other address paths - a key capability for interleaved memory architectures.

Does the SN74ALVCH162344DL require external pullup resistors on its B-inputs?

No, the SN74ALVCH162344DL does not require external pullup or pulldown resistors on its B-inputs because it integrates bus-hold circuitry on all 32 B-inputs (B1–B32). This internal circuit actively maintains the last-valid logic state when inputs are floating, eliminating risk of undefined behavior during power-up, reset, or bus idle periods. Using external resistors with bus-hold enabled is explicitly discouraged in the datasheet as it may cause contention or excessive current draw.

What is the maximum operating temperature range for the SN74ALVCH162344DL?

The SN74ALVCH162344DL is rated for an operating free-air temperature range of –40°C to +85°C, as specified in the Recommended Operating Conditions table of the official Texas Instruments datasheet (SCES085I). This industrial-grade temperature range ensures reliable operation in embedded computing, networking equipment, and industrial control applications where ambient conditions exceed commercial limits.

Can the SN74ALVCH162344DL be used with a 1.8-V microcontroller driving 3.3-V memory chips?

Yes, the SN74ALVCH162344DL supports mixed-voltage operation across its full 1.65-V to 3.6-V VCC range. When powered at 3.3 V, it accepts 1.8-V logic-level inputs (VIH min = 0.65 × VCC = 2.145 V at 3.3 V is not required; actual VIH min at 1.8-V input is verified down to 0.65 × 1.8 V = 1.17 V per bus-hold specs), and its outputs swing rail-to-rail to properly drive 3.3-V memory address inputs. Its 26-Ω series output resistors further ensure clean edges into typical memory load capacitances.

How many total address lines can the SN74ALVCH162344DL drive simultaneously?

The SN74ALVCH162344DL can drive up to 32 address lines simultaneously - organized as eight independent 1-bit-to-4-bit banks (A1→B1–B4, A2→B5–B8, ..., A8→B29–B32). Each A input drives four corresponding B outputs, and all 32 outputs remain active as long as their respective OE pin is low. With all four OE pins asserted, the device fully expands eight address bits into 32 parallel lines, supporting complex memory partitioning schemes in high-end embedded controllers.