Texas Instruments SN74ABTH162460DLR

Overview

SN74ABTH162460DLR from Texas Instruments is a 4-to-1 multiplexed/demultiplexed registered transceiver with 3-state outputs, designed for high-speed address/data bus interfacing in microprocessor systems. It features five 4-bit I/O ports (1A–4A, 1B1–4, 2B1–4, 3B1–4, 4B1–4), 5.0 V operation, 160 MHz max clock frequency, and integrated bus-hold on all data inputs - eliminating external pullup/pulldown resistors.

For engineers reviewing the SN74ABTH162460DLR datasheet, SN74ABTH162460DLR pinout, SN74ABTH162460DLR application, or SN74ABTH162460DLR equivalent, this device supports flexible 4-bit or 16-bit control via OEB/OEA signals, provides latch-enable and clock-enable logic for registered data flow, and delivers B-port outputs with built-in 25-Ω series termination to suppress overshoot/undershoot in high-speed PCB layouts.

Technical Context

The SN74ABTH162460DLR implements a flow-through architecture with distributed V_CC/GND pins to minimize switching noise, and uses EPIC-II^B BiCMOS process for low power dissipation while maintaining TTL-compatible voltage thresholds. Its dual-directional registered transceiver core supports both A-to-B and B-to-A data paths with independent latch-enable (LEABn/LEBn) and clock-enable (CLKENAB/CLKENB) controls.

Four select lines (SEL0, SEL1, CE_SEL0, CE_SEL1) enable per-bit multiplexing of A-port data or selection among four B-port clock enables. Bus-hold circuitry actively maintains valid logic levels on unused A/B port inputs, and the device enters high-impedance state during power-up/down when V_CC is below 2.1 V.

Key Specifications

Pinout & Package

SN74ABTH162460DLR is housed in a 56-pin plastic shrink small-outline package (SSOP, DL package), 300-mil body width, JEDEC MO-118 compliant, with 0.025-inch lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT16246DLR and SN74LVC16246DGGR, the SN74ABTH162460DLR uniquely combines 5-V operation, integrated bus-hold, on-die 25-Ω B-port termination, and 4-to-1 multiplexing capability - making it the only option supporting robust, compact, and timing-predictable bus consolidation in industrial microprocessor systems without external components.

Availability

SN74ABTH162460DLR is available at Aetrix Electronics and suitable for microprocessor bus interface, memory interleaving, high-speed data bridging, and configurable I/O expansion applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for SN74ABTH162460DLR 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 decades of heritage in high-reliability interface ICs and widebus technologies.

The SN74ABTH162460DLR belongs to TI's Widebus™ family of advanced transceivers, engineered specifically for high-speed, low-noise, registered bus interfacing in industrial computing, telecommunications infrastructure, and test equipment.

FAQ

What is the operating voltage range for SN74ABTH162460DLR?

The SN74ABTH162460DLR operates over a supply voltage range of 4.5 V to 5.5 V. This 5-V nominal specification ensures full compatibility with legacy TTL and LVTTL logic families, and its recommended operating conditions specify V_CC = 4.5 V to 5.5 V at –40°C to +85°C ambient temperature. Operation outside this range may compromise timing, drive strength, or latch reliability.

Does SN74ABTH162460DLR require external pullup or pulldown resistors?

No, the SN74ABTH162460DLR includes active bus-hold circuitry on all A- and B-port data inputs, which maintains unused or floating inputs at valid logic levels without external components. This feature is explicitly documented in the datasheet and eliminates the need for discrete pullup/pulldown resistors - reducing BOM count and PCB area in space-constrained designs.

How does the 4-to-1 multiplexing function work in SN74ABTH162460DLR?

The SN74ABTH162460DLR performs 4-to-1 multiplexing using four independent B-port groups (1B1–4, 2B1–4, etc.) and two select lines (SEL0, SEL1). These selects choose which B-group connects to the A-port, while CE_SEL0/CE_SEL1 further allow selection among four clock-enable sources - enabling per-bit or per-group data routing and clock gating under software or hardware control.

What is the purpose of the integrated 25-Ω series resistors on the B-port outputs of SN74ABTH162460DLR?

The integrated 25-Ω series resistors on the B-port outputs of SN74ABTH162460DLR serve to dampen signal reflections and reduce overshoot/undershoot on high-speed PCB traces. They eliminate the need for external series termination resistors, simplify layout, and improve signal integrity - especially critical in dense, high-frequency bus environments where trace impedance mismatches commonly occur.

Is SN74ABTH162460DLR pin-compatible with other devices in the ABTH162460 family?

Yes, the SN74ABTH162460DLR shares identical pinout and functionality with the military-grade SN54ABTH162460 (WD package), differing only in temperature rating (–40°C to +85°C vs. –55°C to +125°C) and package type (DL SSOP vs. WD ceramic flat). Both devices use the same 56-pin footprint and logic behavior, enabling direct substitution in commercial/industrial designs where extended temperature is not required.