Texas Instruments SN74LVCH16374ADLR

Overview

SN74LVCH16374ADLR from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features dual 8-bit sections (1CLK/1OE and 2CLK/2OE), 5.5-V-tolerant inputs, 24-mA output drive at 3.3 V, and bus-hold circuitry on all data inputs - enabling robust bus interfacing in mixed-voltage server and networking systems.

For engineers reviewing the SN74LVCH16374ADLR datasheet, SN74LVCH16374ADLR pinout, SN74LVCH16374ADLR application, or SN74LVCH16374ADLR equivalent, key selection criteria include its Ioff-enabled live insertion support, tpd of 4.5 ns at 3.3 V, 3-state output timing (ten/tdis), 150-MHz max clock frequency, and SSOP-48 package compatibility with high-density PCB layouts.

Technical Context

This device implements two independent 8-bit D-type latches synchronized to separate positive-edge clock inputs (1CLK, 2CLK), each with dedicated output-enable controls (1OE, 2OE). All 16 D inputs accept voltages up to 5.5 V regardless of VCC, enabling level translation from 5-V logic into 3.3-V or 1.8-V domains without external components.

Each output drives ±24 mA at VCC = 3.3 V and supports high-impedance state via OE assertion, while bus-hold circuitry actively maintains valid logic levels on unconnected D inputs - eliminating need for external pull resistors and preventing floating-input-induced system faults.

Key Specifications

Pinout & Package

SN74LVCH16374ADLR uses a 48-pin SSOP (Shrink Small Outline Package) with 15.80 mm × 7.50 mm body size and 0.635-mm lead pitch. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and optimized for automated surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state D-type flip-flop applications.

Compared with SN74LVC16374ADLR, SN74LVCH16374ADLR adds critical reliability features (Ioff, bus-hold, 5.5-V tolerance) at modest speed trade-off; versus 74ALVCH16374DLR, it extends low-voltage operability to 1.65 V while retaining identical robustness - making it optimal for battery-powered or wide-input-range industrial designs.

Availability

SN74LVCH16374ADLR is available at Aetrix Electronics and suitable for server memory buffering, industrial I/O expansion, network switch control plane, and medical imaging data capture requiring stable component supply across extended temperature ranges (–40°C to 125°C).

Supply support for SN74LVCH16374ADLR 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 for industrial, automotive, and communications markets.

SN74LVCH16374ADLR belongs to the Widebus™ family of advanced CMOS logic devices engineered for high-speed, low-voltage, mixed-signal interface applications - particularly where robustness, voltage translation, and power-aware operation are essential.

FAQ

What is the maximum clock frequency supported by SN74LVCH16374ADLR?

The SN74LVCH16374ADLR supports a maximum clock frequency of 150 MHz across its full operating voltage range (1.65 V to 3.6 V), verified under recommended conditions with 30-pF load and ≤2.5-ns input rise/fall times. This rating applies to both 1CLK and 2CLK inputs independently, enabling concurrent high-speed latching in dual-bank configurations.

Does SN74LVCH16374ADLR support live insertion or hot-swap applications?

Yes, SN74LVCH16374ADLR supports live insertion via its Ioff feature, which disables output drivers and blocks current backflow when VCC = 0 V. This allows safe insertion/removal in partially powered backplanes or modular systems - confirmed by JESD78 latch-up testing (>250 mA) and JEDEC-compliant Ioff characterization.

Can SN74LVCH16374ADLR interface directly between 5-V and 3.3-V logic domains?

Yes, SN74LVCH16374ADLR accepts input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5-V microcontrollers or sensors while operating from a 3.3-V supply. Its outputs swing rail-to-rail (0 V to VCC), so external level-shifting is unnecessary for 5-V-to-3.3-V translation - though 3.3-V-to-5-V translation requires additional circuitry.

What package type and dimensions does SN74LVCH16374ADLR use?

SN74LVCH16374ADLR uses an SSOP-48 package (DL suffix) with nominal body dimensions of 15.80 mm × 7.50 mm and 0.635-mm lead pitch. It is RoHS-compliant, moisture-sensitivity Level-1 rated, and supplied in 1000-piece large tape-and-reel format - optimized for high-volume SMT assembly with standard reflow profiles.

How does the bus-hold feature function on SN74LVCH16374ADLR data inputs?

The bus-hold circuitry on all 16 D inputs of SN74LVCH16374ADLR actively maintains the last-valid logic state (high or low) when inputs float, drawing only ±45 μA at 2.3 V. This eliminates external pull-up/pull-down resistors, reduces BOM cost, and prevents undefined states in unterminated stubs - confirmed in TI's SCAS757B datasheet Section 9.3.