STMicroelectronics 74ACT374MTR

Overview

74ACT374MTR from STMicroelectronics is an advanced high-speed CMOS octal D-type flip-flop with 3-state non-inverting outputs, clocked on the LOW-to-HIGH edge, operating from 4.5V to 5.5V, delivering tPLH/tPHL ≤ 11.0 ns (at VCC = 5.0 V), 24 mA output drive, and 2 kV ESD immunity - used in high-speed bus interface and data latching between TTL/CMOS systems.

For engineers reviewing the 74ACT374MTR datasheet, 74ACT374MTR pinout, 74ACT374MTR application, or 74ACT374MTR equivalent, key selection factors include 3-state enable timing (tPZL/tPLZ ≤ 11.0 ns), symmetrical 24 mA drive capability, 50 Ω transmission line compatibility, latch-up immunity, and pin/function compatibility with standard 74-series 374 devices.

Technical Context

The device implements eight independent D-type latches triggered by a common rising-edge clock (CK) and controlled by an active-low 3-state output enable (OE). Internal operation continues regardless of OE state - data can be latched while outputs remain high-impedance.

Designed for mixed-logic interfacing, it features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V), symmetrical output drive (|IOH| = IOL ≥ 24 mA), and guaranteed incident-wave switching on 50 Ω transmission lines.

Key Specifications

Pinout & Package

74ACT374MTR is supplied in a 20-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-013AA, with 0.300-inch body width, 1.27 mm pitch, and gull-wing leads.

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 SN74ACT374N and 74VHC374M, the 74ACT374MTR delivers optimal balance of speed (260 MHz), drive strength (24 mA), and SOIC packaging for automated SMT production - making it preferred for volume industrial and automotive control modules where thermal performance and board space matter.

Availability

74ACT374MTR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automotive instrument cluster data latching, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ACT374MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The 74ACT high-speed CMOS logic family targets robust, pin-compatible replacements for legacy 74LS/74F devices - emphasizing speed, low power, and interoperability across TTL, CMOS, and NMOS systems.

FAQ

What is the maximum clock frequency supported by the 74ACT374MTR?

The 74ACT374MTR supports a maximum clock frequency of 260 MHz (typical) at VCC = 5.0 V and TA = 25°C, with a guaranteed minimum of 85 MHz across the full −55°C to +125°C operating temperature range. This rating assumes proper load conditions (CL = 50 pF, RL = 500 Ω) and input rise/fall times meeting the 8 ns/V specification.

Can the 74ACT374MTR drive a 50 Ω transmission line directly?

Yes - the device guarantees incident-wave switching on 50 Ω transmission lines per its AC specifications, with symmetrical |IOH| = IOL ≥ 24 mA output drive. This eliminates the need for external series termination resistors in point-to-point configurations, provided trace impedance is well-controlled and stub lengths are minimized.

How does the OE pin behave during clock transitions?

The OE pin operates independently of the clock: when OE is high, all Q outputs enter high-impedance regardless of CK activity or D input state; when OE is low, Q outputs reflect the most recently latched D values on the prior rising CK edge. Internal latching continues uninterrupted during OE assertion.

Is the 74ACT374MTR compatible with 3.3 V logic systems?

No - the 74ACT374MTR is specified only for VCC = 4.5 V to 5.5 V operation and requires TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Direct connection to 3.3 V logic without level translation risks unreliable switching and violates absolute maximum ratings for VI.