Texas Instruments 74LVTH16374DLRG4

Overview

74LVTH16374DLRG4 from Texas Instruments is a 3.3-V ABT 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for mixed-mode 5-V/3.3-V system interfacing in high-speed bus applications. It features dual 8-bit sections (1Q1–1Q8 and 2Q1–2Q8), 48-pin SSOP package, 160 MHz max clock frequency at VCC = 3.3 V, and bus-hold circuitry eliminating external pullup resistors.

For engineers reviewing the 74LVTH16374DLRG4 datasheet, 74LVTH16374DLRG4 pinout, 74LVTH16374DLRG4 application, or 74LVTH16374DLRG4 equivalent, this device serves as a high-drive, low-noise register for bidirectional data buses, I/O port expansion, and buffer registers in industrial control and telecom backplanes where hot-insertion and power-down isolation are required.

Technical Context

This device implements two independent 8-bit positive-edge-triggered D-type flip-flops with separate clock (1CLK/2CLK) and output-enable (1OE/2OE) controls, enabling flexible partitioning as either one 16-bit or two 8-bit registers. Each section drives eight 3-state outputs with ±64 mA low-level and –32 mA high-level output current capability at VCC = 3.3 V.

Its Advanced BiCMOS Technology (ABT) ensures TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) while operating from 2.7 V to 3.6 V, supporting unregulated battery operation and robust 5-V signal tolerance on inputs/outputs. Ioff and power-up 3-state logic guarantee safe hot insertion without bus contention.

Key Specifications

Pinout & Package

74LVTH16374DLRG4 uses a 48-pin SSOP (DL) package measuring 12.6 mm × 6.2 mm × 1.2 mm (max height), with gull-wing leads, RoHS-compliant NiPdAu finish, and MSL Level-1 rating for unlimited reflow exposure.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered buffer applications.

Compared with SN74LVC16374ADGGR and 74ALVCH16374DLR, the 74LVTH16374DLRG4 uniquely combines 5-V tolerance, bus-hold, and Ioff-enabled hot insertion in a single 3.3-V register - making it irreplaceable in field-upgradable industrial and telecom systems requiring zero-bus-conflict maintenance.

Availability

74LVTH16374DLRG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, automotive body control modules, and ATE pattern generators requiring stable component supply across extended temperature ranges (–40°C to 85°C).

Supply support for 74LVTH16374DLRG4 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 expertise in high-reliability interface and timing devices.

The LVTH family delivers advanced BiCMOS logic optimized for 3.3-V operation with TTL compatibility, targeting mixed-voltage system interconnects in industrial automation, communications infrastructure, and automotive electronics.

FAQ

What is the maximum clock frequency supported by the 74LVTH16374DLRG4?

The 74LVTH16374DLRG4 supports a maximum clock frequency of 160 MHz when operated at VCC = 3.3 V ± 0.3 V and under recommended load conditions (CL = 50 pF). This specification is guaranteed across the full operating temperature range of –40°C to 85°C and reflects the device's ability to reliably capture data on every positive clock edge without setup/hold violations.

Does the 74LVTH16374DLRG4 support hot insertion, and how is it implemented?

Yes, the 74LVTH16374DLRG4 supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V, preventing damaging backflow current, and power-up 3-state logic forces outputs into high-impedance during power ramp-up/down. These functions are inherent to the ABT process and require no external components - confirmed in TI's SCBS145R datasheet Section "DESCRIPTION/ORDERING INFORMATION".

What package type and dimensions does the 74LVTH16374DLRG4 use?

The 74LVTH16374DLRG4 uses a 48-pin SSOP (Shrink Small Outline Package) with designation DL, measuring 12.6 mm × 6.2 mm × 1.2 mm (maximum height). Its lead pitch is 0.5 mm, and it features gull-wing terminations with NiPdAu plating. The package complies with JEDEC MO-153 and carries an MSL Level-1 rating for unlimited reflow exposure.

Can the 74LVTH16374DLRG4 operate with a 2.7-V supply, and what performance trade-offs apply?

Yes, the 74LVTH16374DLRG4 is fully specified down to VCC = 2.7 V per TI's Recommended Operating Conditions table. At this voltage, the maximum clock frequency remains 160 MHz, but propagation delays increase slightly (tPLH/tPHL up to 6.2 ns), and output drive strength reduces to ±48 mA (IOL) and –24 mA (IOH). All logic thresholds and bus-hold functionality remain fully operational.

How does bus-hold functionality work on the 74LVTH16374DLRG4, and why is it valuable?

The 74LVTH16374DLRG4 integrates active bus-hold circuitry on all data inputs (1D1–1D8, 2D1–2D8), which detects and reinforces the last valid logic state (high or low) when inputs float. This eliminates the need for external pullup/pulldown resistors - reducing BOM count, PCB area, and risk of signal degradation. Bus-hold current is ±750 μA maximum, ensuring robust state retention without loading the source driver.