Texas Instruments SN74ABT374ANSR

Overview

SN74ABT374ANSR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin SOP (NS) package. It operates at 4.5–5.5 V, delivers ±32 mA high-drive outputs, supports 150 MHz clock frequency, and features low propagation delay (tPLH/tPHL ≤ 6.2 ns) for high-speed bus interfacing in industrial control and data acquisition systems.

For engineers reviewing the SN74ABT374ANSR datasheet, SN74ABT374ANSR pinout, SN74ABT374ANSR application, or SN74ABT374ANSR equivalent, key selection criteria include 3-state output timing (tPZH/tPLZ ≤ 6.7 ns), latch-up immunity (>500 mA), ESD robustness (>2000 V HBM), and compatibility with 5-V TTL/CMOS logic families in space-constrained PCB layouts.

Technical Context

This device implements eight independent D-type latches triggered on the positive clock edge, with asynchronous 3-state control via a buffered OE input that does not affect internal state retention. Each flip-flop samples D inputs synchronously and drives Q outputs only when OE is low.

Its EPIC-II^B BiCMOS process enables high drive strength (–32 mA IOH, 64 mA IOL) while maintaining low ground bounce (<1 V VOLP) and sub-2.5 ns setup/hold times. The design targets bidirectional bus buffering where fast enable/disable transitions and high capacitive load drive are required.

Key Specifications

Pinout & Package

SOP (NS) package, 20-pin, 0.65 mm pitch, 7.5 mm × 13.0 mm body size, 1.2 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT244NSR and SN74LVC574APWR, the SN74ABT374ANSR uniquely combines 5-V operation, edge-triggered storage, and high-current 3-state outputs-making it irreplaceable in industrial bus-holding and legacy interface applications requiring deterministic timing and robust drive.

Availability

SN74ABT374ANSR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, memory address latching, and test equipment data capture requiring stable component supply across extended temperature ranges and high-reliability manufacturing.

Supply support for SN74ABT374ANSR 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74ABT374ANSR belongs to TI's ABT logic family, engineered for high-speed 5-V bus interface applications demanding robust drive, precise timing, and industrial-grade reliability in harsh operating environments.

FAQ

What is the maximum clock frequency supported by the SN74ABT374ANSR?

The SN74ABT374ANSR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This specification is validated across the full industrial temperature range (–40°C to +85°C), enabling reliable use in high-throughput digital control and data acquisition systems where deterministic edge-triggered behavior is critical. The SN74ABT374ANSR maintains timing integrity even with capacitive loads up to 50 pF.

Does the SN74ABT374ANSR require external pull-up resistors on the OE pin?

Yes - to ensure the outputs remain in high-impedance state during power-up or power-down, OE should be tied to VCC through a pull-up resistor. The minimum resistance value depends on the current-sinking capability of the driving source, but typical values range from 4.7 kΩ to 10 kΩ. This prevents bus contention before system initialization completes, and the SN74ABT374ANSR's OE input is designed to tolerate this configuration without affecting internal flip-flop state retention.

Can the SN74ABT374ANSR drive a 100-pF bus load reliably?

The SN74ABT374ANSR is characterized for CL = 50 pF in timing specifications, but its ±32 mA/64 mA output drive capability allows it to drive heavier loads such as 100-pF buses - albeit with increased propagation delay and potential signal rise/fall time degradation. For guaranteed timing compliance at 100 pF, derating analysis or empirical validation is recommended; the SN74ABT374ANSR's high drive strength minimizes distortion, but layout-dependent parasitics must be controlled to maintain signal integrity.

Is the SN74ABT374ANSR pin-compatible with other packages in the same family?

No - the SN74ABT374ANSR uses a 20-pin SOP (NS) package with 0.65 mm pitch, distinct from SOIC (DW), SSOP (DB), and TSSOP (PW) variants which have different footprints, dimensions, and thermal characteristics. While electrical functionality and pin functions are identical across the SN74ABT374A family, mechanical compatibility requires matching the specific package drawing (NS for SN74ABT374ANSR). Board redesign is necessary when substituting between NS, DW, DB, or PW packages.

What is the latch-up immunity rating for the SN74ABT374ANSR?

The SN74ABT374ANSR exceeds 500 mA latch-up immunity per JEDEC Standard JESD-17. This rating was verified under worst-case stress conditions and confirms robust protection against destructive CMOS latch-up events caused by transient overvoltages or supply glitches. The SN74ABT374ANSR maintains functional integrity in electrically noisy industrial environments where such transients are common, eliminating need for external protection circuitry in most applications.