Texas Instruments SN74ABT374ANS

Overview

SN74ABT374ANS from NXP Semiconductors is an 8-bit positive-edge-triggered D-type flip-flop with independent 3-state output control, operating at 4.5–5.5 V supply, delivering ±32 mA/±64 mA drive capability, and supporting up to 300 MHz clock frequency in commercial temperature range (−40 °C to +85 °C). It functions as a high-speed data latch and bus interface buffer in synchronous digital systems.

For engineers reviewing the SN74ABT374ANS datasheet, SN74ABT374ANS pinout, SN74ABT374ANS application, or SN74ABT374ANS equivalent, key selection considerations include its BiCMOS architecture for low power/high speed trade-off, active-Low 3-state enable timing (tPZH/tPLZ < 5.4 ns), setup/hold times under 1.5 ns, and compatibility with TTL- and CMOS-level buses in memory and microprocessor interfacing.

Technical Context

The SN74ABT374ANS integrates eight edge-triggered D flip-flops with fully synchronous positive-edge clock capture and asynchronous 3-state output control via OE. Its BiCMOS process enables rail-to-rail output swing, fast propagation delays (tPLH/tPHL ≤ 5.1 ns), and robust bus-driving capability into heavy capacitive loads.

Each flip-flop samples Dn one setup time before the rising CP edge and holds state until the next valid clock transition. The 3-state buffers operate independently of clock activity-OE HIGH forces all Q outputs into high-impedance OFF-state regardless of CP or stored data, enabling true bus sharing without contention.

Key Specifications

Pinout & Package

SN74ABT374ANS uses the plastic dual in-line package (DIP20), SOT146-1 variant: 20-pin through-hole package with 300-mil body width, 2.54 mm lead pitch, and 0.51 mm lead thickness - suitable for prototyping, legacy PCBs, and industrial control modules requiring mechanical robustness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74F374N and SN74ACT374N, SN74ABT374ANS delivers optimal balance of speed (300 MHz), drive strength (+64 mA), industrial temperature range, and built-in robustness features (power-on 3-state, 500 mA latch-up rating), making it the preferred choice for reliable bus interface in demanding embedded control systems.

Availability

SN74ABT374ANS is available at Aetrix Electronics and suitable for memory address latching, microprocessor data bus interfacing, and industrial I/O expansion requiring stable component supply across long-lifecycle embedded programs.

Supply support for SN74ABT374ANS 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The SN74ABT374ANS belongs to NXP's ABT-series advanced BiCMOS logic family, designed specifically for high-speed, low-power bus interface and data latching in industrial control, computing, and communications infrastructure.

FAQ

What is the maximum clock frequency supported by the SN74ABT374ANS?

The SN74ABT374ANS supports a maximum clock frequency of 300 MHz under recommended operating conditions (VCC = 5.0 V ± 0.5 V, Tamb = −40 °C to +85 °C). This specification is validated per Table 7 of the NXP datasheet Rev. 2 (2012), with typical operation at 200–300 MHz depending on load and signal integrity. The SN74ABT374ANS achieves this performance using BiCMOS process technology that balances speed and power efficiency.

Does the SN74ABT374ANS have power-on reset or power-on 3-state behavior?

Yes, the SN74ABT374ANS features power-on 3-state functionality: all Q outputs remain in high-impedance during power-up sequencing, preventing bus contention before system initialization completes. This behavior is inherent to the internal biasing and does not require external circuitry. The SN74ABT374ANS does not implement a dedicated power-on reset for flip-flop states - stored data after power-up is undefined until first valid clock edge.

What are the absolute maximum ratings for supply voltage and input voltage on the SN74ABT374ANS?

The SN74ABT374ANS has an absolute maximum supply voltage (VCC) of +7.0 V and minimum of −0.5 V. Input voltage (VI) may range from −1.2 V to +7.0 V, provided input clamping current limits are observed. These values are specified in Table 4 of the NXP datasheet and define stress limits beyond which permanent damage may occur - operation must remain within recommended conditions (VCC = 4.5–5.5 V, VI = 0–VCC) for reliable SN74ABT374ANS function.

Can the SN74ABT374ANS drive standard TTL loads directly?

Yes, the SN74ABT374ANS can directly drive standard TTL loads: its output drive capability of −32 mA (source) and +64 mA (sink) exceeds the TTL input current requirements (IIH ≤ 40 µA, IIL ≤ 1.6 mA). Additionally, VOH ≥ 2.5 V (at IOH = −3 mA) and VOL ≤ 0.55 V (at IOL = 64 mA) meet TTL voltage thresholds. This makes the SN74ABT374ANS suitable for interfacing with legacy TTL systems without level-shifting components.

Is the SN74ABT374ANS pin-compatible with other 74-series octal D flip-flops in DIP20 package?

Yes, the SN74ABT374ANS shares identical pinout (per Table 2 and Figures 4–5) with industry-standard 74xx374 devices including 74LS374, 74F374, and 74ACT374 in DIP20 (SOT146-1) package. Pin assignments for D0–D7, Q0–Q7, CP, OE, VCC, and GND are functionally and physically aligned, enabling drop-in replacement in existing layouts - though timing, drive, and electrical characteristics differ and must be verified per application.