Texas Instruments SN74LV374ATNSG4

Overview

SN74LV374ATNSG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus interface and data latching in 5-V digital systems. It operates from 4.5 V to 5.5 V, delivers typical propagation delay of 4.9 ns at 5 V, supports TTL-voltage-compatible inputs, and features Ioff partial-power-down protection. It is used in bidirectional bus drivers and I/O port buffering.

For engineers reviewing the SN74LV374ATNSG4 datasheet, SN74LV374ATNSG4 pinout, SN74LV374ATNSG4 application, or SN74LV374ATNSG4 equivalent, key selection criteria include 3-state output timing (ten/tdis), clock frequency support up to 90 MHz (CL = 15 pF), Ioff-enabled power-down isolation, and SOIC-20 package compatibility with industrial temperature range (–40°C to 125°C).

Technical Context

This device implements eight independent D-type latches triggered on the rising edge of CLK, with synchronous data capture and asynchronous 3-state control via OE. Each output can be driven high, low, or placed into high-impedance mode without affecting internal latch state.

It uses LVCMOS logic with TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V at VCC = 4.5–5.5 V), supports mixed-mode voltage operation, and includes robust noise immunity (VOLP < 0.8 V, VOHV > 2.3 V) and ESD protection exceeding JESD22 standards.

Key Specifications

Pinout & Package

SN74LV374ATNSG4 is packaged in a 20-pin SOP (NS) surface-mount package, 7.4 mm × 5.3 mm body size, 1.27 mm lead pitch, and 2.65 mm max height per JEDEC MS-013.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.

Compared with SN74LV374ATNSG4, SN74LVC374A requires 3.3-V infrastructure and lacks Ioff, while 74ACT374 offers superior speed but sacrifices power-down safety and noise performance-making SN74LV374ATNSG4 the optimal choice for robust 5-V industrial bus interfaces requiring fail-safe isolation.

Availability

SN74LV374ATNSG4 is available at Aetrix Electronics and suitable for industrial I/O expansion, automotive sensor data capture, and legacy bus interface bridge applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant temperature grading.

Supply support for SN74LV374ATNSG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The SN74LV374ATNSG4 belongs to TI's LV family of low-voltage, 5-V tolerant logic devices engineered for high-noise-immunity bus interfacing and robust operation in harsh electrical environments.

FAQ

What is the recommended operating voltage range for SN74LV374ATNSG4?

The SN74LV374ATNSG4 is specified for 4.5 V to 5.5 V VCC operation. Operation outside this range may cause functional failure or reliability degradation. At 5 V, it achieves its rated 4.9 ns typical propagation delay and ±16 mA output drive. The device maintains TTL-compatible input thresholds across the full range, ensuring interoperability with legacy 5-V logic families.

Does SN74LV374ATNSG4 support partial power-down functionality?

Yes, SN74LV374ATNSG4 includes Ioff circuitry that disables outputs and blocks reverse current flow when VCC = 0 V. This feature protects downstream circuits during hot-swap or multi-rail power sequencing. Ioff leakage is guaranteed ≤ 5 µA over –40°C to 125°C, making SN74LV374ATNSG4 suitable for systems requiring safe partial-power-down operation per JESD78.

What is the maximum clock frequency supported by SN74LV374ATNSG4?

SN74LV374ATNSG4 supports up to 90 MHz maximum clock frequency at CL = 15 pF and VCC = 5 V. At higher capacitive loads (CL = 50 pF), the maximum frequency reduces to 85 MHz. These values are validated across the full –40°C to 125°C temperature range and reflect guaranteed timing margins-not just typical performance.

How does the OE pin function on SN74LV374ATNSG4?

The OE pin on SN74LV374ATNSG4 is active-low and controls all eight outputs simultaneously. When OE is low, outputs reflect the latched Q states; when OE is high, all outputs enter high-impedance mode regardless of CLK or D inputs. OE does not affect internal latch operation-data retention and updates continue normally during high-Z output states.

Is SN74LV374ATNSG4 pin-compatible with other 20-pin octal D-flip-flops?

SN74LV374ATNSG4 shares identical pinout with SN74LV374ATDWR (SOIC), SN74LV374ATPWR (TSSOP), and SN74LV374ATDBR (SSOP) variants. However, it is not pin-compatible with non-LV series devices like 74ACT374 or 74HC374 due to differing OE/CLK placement and logic polarity conventions. Always verify pin mapping using TI's SCES632 datasheet before board reuse.