Texas Instruments SN74LVCH16374AGRDR

Overview

SN74LVCH16374AGRDR 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 banks (1Q1–1Q8 and 2Q1–2Q8), independent output-enable (1OE/2OE) and clock (1CLK/2CLK) inputs, 5.5-V-tolerant inputs, and max propagation delay of 4.5 ns at 3.3 V. It is used in high-speed bus interface, I/O port buffering, and bidirectional data latching in servers and network switches.

For engineers reviewing the SN74LVCH16374AGRDR datasheet, SN74LVCH16374AGRDR pinout, SN74LVCH16374AGRDR application, or SN74LVCH16374AGRDR equivalent, key selection criteria include 3-state drive strength (±24 mA at 3 V), bus-hold on all data inputs, Ioff support for live insertion, mixed-voltage translation capability (5-V inputs → 3.3-V outputs), and thermal performance in TSSOP-48 package.

Technical Context

This device implements two independent 8-bit positive-edge-triggered D-type flip-flop banks, each with dedicated output-enable and clock inputs. Each bank latches data on the rising edge of its respective CLK and drives eight 3-state outputs controlled by its OE signal - enabling simultaneous or staggered latching and bus isolation.

It integrates bus-hold circuitry on all 16 data inputs (1D1–1D8, 2D1–2D8), eliminating external pull resistors, and supports partial-power-down via Ioff, which disables outputs and blocks current backflow when VCC = 0 V. Inputs tolerate up to 5.5 V regardless of VCC level, enabling robust 5-V-to-3.3-V level translation.

Key Specifications

Pinout & Package

TSSOP-48 package (DGG), body size 12.50 mm × 6.10 mm, 0.5-mm lead pitch, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVCH16374AGRDR, SN74LVC16374ADGGR lacks bus-hold and 5.5-V tolerance - increasing design risk in uncontrolled input environments - while 74ALVCH16374TTR sacrifices low-voltage operation and overvoltage resilience for marginal speed improvement in narrow supply windows.

Availability

SN74LVCH16374AGRDR is available at Aetrix Electronics and suitable for server memory buffering, industrial I/O expansion, network switch data path, embedded PC peripheral interface, and wearable health device signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for SN74LVCH16374AGRDR 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 specializing in analog and embedded processing technologies, with leadership in logic, interface, and power management ICs for industrial, automotive, and communications markets.

The SN74LVCH16374AGRDR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically for high-speed, low-voltage, mixed-signal system interfacing with emphasis on robustness, translation, and bus integrity.

FAQ

What is the maximum clock frequency supported by the SN74LVCH16374AGRDR?

The SN74LVCH16374AGRDR supports a maximum clock frequency of 150 MHz across its full operating voltage range (1.65 V to 3.6 V), as confirmed by timing characterization in the datasheet. This is enabled by a typical propagation delay (tpd) of 4.5 ns at 3.3 V and guaranteed minimum pulse width (tw) of 3.3 ns for both clock high and low periods under all recommended conditions.

Does the SN74LVCH16374AGRDR support 5-V input signals while operating at 3.3-V VCC?

Yes, the SN74LVCH16374AGRDR accepts input voltages up to 5.5 V regardless of VCC level - including when VCC = 3.3 V. This is explicitly specified in the "Recommended Operating Conditions" table and enables seamless 5-V-to-3.3-V level translation without external components, making it ideal for mixed-voltage system interfacing.

How does the bus-hold feature work on the SN74LVCH16374AGRDR, and what is its design impact?

The SN74LVCH16374AGRDR integrates active bus-hold circuitry on all 16 data inputs (1D1–1D8, 2D1–2D8), maintaining a valid logic state (±45 μA hold current at 2.3 V) when inputs float. This eliminates the need for 16 external pull-up or pull-down resistors - reducing BOM cost, PCB area, and potential signal integrity issues from resistor parasitics.

Can the SN74LVCH16374AGRDR be used in hot-swap or partial-power-down applications?

Yes, the SN74LVCH16374AGRDR includes Ioff circuitry that disables outputs and blocks current backflow when VCC = 0 V. This feature is qualified per JESD78 and supports live insertion, partial-power-down, and back-drive protection - making it suitable for modular server backplanes, telecom line cards, and other hot-pluggable systems.

What package type and thermal characteristics apply to the SN74LVCH16374AGRDR?

The SN74LVCH16374AGRDR is supplied in a TSSOP-48 (DGG) package measuring 12.50 mm × 6.10 mm. Its junction-to-ambient thermal resistance (RθJA) is 64.3°C/W, and it is rated for operation from –40°C to +125°C ambient. The package carries MSL Level-1 rating with unlimited floor life at ≤30°C/60% RH and peak reflow at 260°C.