Texas Instruments SN74ABTH162460DL

Overview

SN74ABTH162460DL from Texas Instruments is a 4-to-1 multiplexed/demultiplexed registered transceiver with 3-state outputs, designed for high-speed address/data bus interface in microprocessor systems. It features five 4-bit I/O ports (1A–4A, 1B1–4, 2B1–4, 3B1–4, 4B1–4), latch-enable and clock-enable control, bus-hold on data inputs, and B-port outputs with integrated 25-Ω series resistors. It operates from –40°C to 85°C at 4.5 V to 5.5 V supply.

For engineers reviewing the SN74ABTH162460DL datasheet, SN74ABTH162460DL pinout, SN74ABTH162460DL application, or SN74ABTH162460DL equivalent, key selection considerations include its 56-pin SSOP (DL) package, 160 MHz maximum clock frequency, 4-bit/16-bit dual-control capability via OEB/OEA, latch-transparent operation under LE high, and compatibility with memory-interleaving and bus-multiplexing architectures requiring registered flow-through timing.

Technical Context

The SN74ABTH162460DL implements a registered transceiver architecture with independent A-to-B and B-to-A storage paths controlled by dedicated latch-enable (LEABn/LEBn/LEBA) and clock/clock-enable (CLKAB/CLKBA/CLKENAB/CLKENB/CLKENBA) inputs. Its flow-through logic enables optimized PCB layout while distributed VCC/GND pins suppress high-speed switching noise.

It supports both 4-bit granular control (via OEB1–OEB4) and full 16-bit control (via OEB), with four select lines (SEL0/SEL1/CE_SEL0/CE_SEL1) enabling per-bit multiplexing or clock-enable selection. Bus-hold circuitry eliminates external pullup/pulldown resistors on all data inputs, and high-impedance state is guaranteed during power-up/down when VCC is below 2.1 V.

Key Specifications

Pinout & Package

SN74ABTH162460DL uses a 56-pin plastic shrink small-outline package (SSOP, DL), 300-mil body width, JEDEC MO-118 compliant, with 0.025-inch lead pitch. Pin 1 is marked by a beveled corner; top view orientation matches standard SSOP conventions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar registered transceiver applications.

Compared with SN74ABT16246DL and SN74LVTH16246DL, the SN74ABTH162460DL uniquely integrates 4-to-1 multiplexing, per-group clock enable, and on-die B-port termination-enabling compact, high-integrity bus interface designs without external logic or resistors.

Availability

SN74ABTH162460DL is available at Aetrix Electronics and suitable for microprocessor bus interface, memory interleaving, high-speed data multiplexing, and configurable I/O expansion applications requiring stable component supply and long-term industrial availability.

Supply support for SN74ABTH162460DL 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 delivering analog and embedded processing solutions, with leadership in logic, interface, and widebus technologies since the 1970s.

The SN74ABTH162460DL belongs to TI's Widebus™ family of high-speed ABT logic devices, engineered specifically for registered bus interface applications demanding low skew, noise immunity, and flexible data path control in industrial and computing systems.

FAQ

What is the function of the CE_SEL0 and CE_SEL1 pins on the SN74ABTH162460DL?

The CE_SEL0 and CE_SEL1 pins on the SN74ABTH162460DL select which of four clock-enable channels controls the B-port latching function. When used with CLKENB and LEBn inputs, they allow dynamic selection of clock sources for individual 4-bit B-port groups-enabling independent timing control per memory bank or peripheral channel without external logic.

Does the SN74ABTH162460DL require external pullup or pulldown resistors on its data inputs?

No, the SN74ABTH162460DL does not require external pullup or pulldown resistors on its A or B port data inputs because it includes active bus-hold circuitry. This internal feature maintains unused or floating inputs at a valid logic level, ensuring deterministic behavior and eliminating board-level termination components.

How does the SN74ABTH162460DL handle power-up and power-down sequencing?

The SN74ABTH162460DL enters a guaranteed high-impedance state when VCC is between 0 V and 2.1 V during power-up or power-down. To ensure tri-state behavior above 2.1 V, OEA and OEB should be tied to VCC through pullup resistors-minimum value determined by driver current-sinking capability per datasheet guidance.

Can the SN74ABTH162460DL operate with a 3.3-V supply?

No, the SN74ABTH162460DL is specified only for 4.5 V to 5.5 V operation. Its ABT-family BiCMOS process and input thresholds are optimized for 5-V TTL compatibility. Using 3.3 V violates recommended operating conditions and risks unreliable logic levels, increased static current, and potential latch-up.

What is the purpose of the 25-Ω series resistors on the B-port outputs of the SN74ABTH162460DL?

The 25-Ω series resistors on the B-port outputs of the SN74ABTH162460DL are integrated to damp signal reflections and reduce overshoot/undershoot on transmission lines. They eliminate the need for external series termination resistors, simplifying layout and improving signal integrity for point-to-point or short-bus connections up to ~10 cm.