Texas Instruments CLVTH16374IDLREP

Overview

CLVTH16374IDLREP from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for 3.3-V V_CC operation while supporting 5-V TTL-level inputs and outputs. It features bus-hold on all data inputs, I_off and power-up 3-state for hot insertion, and operates across −40°C to 85°C. It is used in bidirectional bus drivers, I/O ports, and working registers in industrial control backplanes.

For engineers reviewing the CLVTH16374IDLREP datasheet, CLVTH16374IDLREP pinout, CLVTH16374IDLREP application, or CLVTH16374IDLREP equivalent, key selection criteria include its 160-MHz maximum clock frequency, 2.7-V to 3.6-V supply range, 3-state output enable timing (t_PZL/t_PHZ ≤ 5.4 ns), bus-hold current (±500 µA), and SSOP-48 package compatibility with legacy 5-V system interfacing.

Technical Context

This device implements two independent 8-bit D-type latches with separate clock and output-enable controls per group, enabling flexible partitioning as either one 16-bit or two 8-bit registers. Each latch samples D-inputs on the positive clock edge and drives Q-outputs with TTL-compatible voltage thresholds (V_IL = 0.8 V, V_IH = 2 V) under 3.3-V supply.

Its ABT BiCMOS process delivers low static power (I_CC = 0.19 mA when outputs disabled), high noise immunity (V_OLP < 0.8 V), and robust ESD protection (2000-V HBM). The flow-through pinout and distributed V_CC/GND reduce switching noise, while I_off prevents backflow during partial power-down.

Key Specifications

Pinout & Package

CLVTH16374IDLREP is housed in a 48-pin SSOP (DL) package with 0.635-mm pitch, 12.5-mm body width, and moisture sensitivity level 1 (260°C reflow compatible).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16374ADGGR and 74ALVCH16374PAG, CLVTH16374IDLREP uniquely combines 5-V tolerance, bus-hold, I_off, and SSOP-48 packaging - making it the only option for retrofitting 5-V industrial backplanes without layout changes or additional components.

Availability

CLVTH16374IDLREP is available at Aetrix Electronics and suitable for industrial automation backplanes, legacy system I/O expansion, and high-density data acquisition modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CLVTH16374IDLREP 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 experience in industrial-grade interface ICs.

The CLVTH16374IDLREP belongs to TI's Widebus™ family of advanced BiCMOS logic devices, engineered specifically for mixed-voltage system interfacing, hot-plug reliability, and noise-immune operation in harsh industrial environments.

FAQ

What is the operating temperature range for CLVTH16374IDLREP?

The CLVTH16374IDLREP is specified for continuous operation from −40°C to +85°C ambient temperature. This range is validated per JEDEC qualification standards including temperature cycling, biased 85/85, and HAST testing. Its ABT BiCMOS process ensures stable timing and output drive across this full industrial range, making CLVTH16374IDLREP suitable for deployment in outdoor control cabinets and factory-floor equipment without derating.

Does CLVTH16374IDLREP support hot insertion, and how is it implemented?

Yes, CLVTH16374IDLREP supports hot insertion via two integrated features: I_off circuitry disables outputs when V_CC = 0 V, preventing damaging current backflow; and power-up 3-state forces outputs into high-impedance during power ramp-up (0–1.5 V). These functions are inherent to the silicon design and require no external circuitry - a key advantage over standard LVC or LV families. CLVTH16374IDLREP thus enables safe live replacement in modular ATE and telecom shelf systems.

Can CLVTH16374IDLREP interface directly with 5-V logic, and what limits apply?

Yes, CLVTH16374IDLREP accepts 5-V inputs and drives 5-V loads while operating from a 3.3-V supply. Input voltage range is −0.5 V to 5.5 V, and output voltage swing reaches V_OH ≥ 2.4 V (I_OH = −8 mA) and V_OL ≤ 0.5 V (I_OL = 24 mA) - fully compatible with TTL thresholds. However, sustained 5-V output loading above 64 mA per pin exceeds specification, so CLVTH16374IDLREP must not be used to drive unterminated 5-V transmission lines or heavy capacitive loads without verification.

What is the purpose of bus-hold circuitry on CLVTH16374IDLREP data inputs?

The bus-hold circuitry on CLVTH16374IDLREP data inputs actively maintains the last-valid logic state (high or low) when inputs float, eliminating the need for external pullup or pulldown resistors. It draws ±500 µA at V_CC = 3.6 V to override typical noise-induced transitions. This feature reduces BOM count and PCB area in systems with sparsely populated I/O headers or shared data buses - a core benefit confirmed in CLVTH16374IDLREP's application notes for industrial I/O modules.

How does the SSOP-48 (DL) package of CLVTH16374IDLREP differ from the TSSOP-48 (DGG) variant?

The CLVTH16374IDLREP uses the DL package: a 48-pin SSOP with 0.635-mm lead pitch, 12.5-mm body width, and 1.75-mm height. In contrast, the DGG variant uses a narrower TSSOP (5.6-mm width) with finer 0.5-mm pitch. While both share identical pinout and electrical behavior, the DL package offers greater mechanical robustness and thermal mass (θ_JA = 63°C/W vs. 70°C/W), making CLVTH16374IDLREP preferred for high-vibration environments or where hand-soldering rework is anticipated.