Texas Instruments CD74FCT374M

Overview

CD74FCT374M from Texas Instruments is a BiCMOS octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus interface and register applications. It features 48-mA output sink current, 70-MHz clock frequency, 2-ns data setup/hold times, and operates over 0°C to 70°C. It drives capacitive or low-impedance bus lines directly without pull-up components.

For engineers reviewing the CD74FCT374M datasheet, CD74FCT374M pinout, CD74FCT374M application, or CD74FCT374M equivalent, key selection criteria include 3-state bus driving capability, TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), controlled output edge rates to suppress EMI, and SOIC-20 package compatibility with industrial control and data acquisition systems.

Technical Context

The CD74FCT374M implements eight independent D-type latches triggered on the low-to-high CLK transition, with asynchronous 3-state control via an OE input that does not affect internal register state. Its BiCMOS output stage limits VOH to ~3.7 V (two diode drops below VCC), reducing VCC/ground bounce and EMI during simultaneous switching.

Input buffering isolates inputs from VCC noise, while SCR latch-up-resistant process ensures robustness in noisy environments. Timing parameters are specified at VCC = 4.75–5.25 V, with tpd = 2–10 ns, ten = 1.5–12.5 ns, and tdis = 1.5–8 ns - enabling high-speed synchronous data capture in backplane and peripheral interface designs.

Key Specifications

Pinout & Package

CD74FCT374M is housed in a 20-pin SOIC (DW) package, 7.5 mm wide, 12.83 mm long, 2.65 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.

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 SN74FCT374N and 74AC374PC, CD74FCT374M delivers superior thermal performance in SOIC packaging, higher sink current for robust bus driving, and built-in output voltage limiting to suppress EMI - making it optimal for industrial bus interfaces requiring reliability and signal integrity.

Availability

CD74FCT374M is available at Aetrix Electronics and suitable for industrial I/O expansion, microcontroller bus interfacing, and test equipment signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for CD74FCT374M 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 ICs, with decades of experience in high-reliability industrial and automotive solutions.

The CD74FCT374M belongs to TI's FCT logic family - engineered for high-speed, low-noise 5-V bus interface applications where EMI reduction, latch-up immunity, and TTL compatibility are critical.

FAQ

What is the maximum clock frequency supported by CD74FCT374M?

The CD74FCT374M supports a maximum clock frequency of 70 MHz under recommended operating conditions (VCC = 4.75–5.25 V, TA = 0°C to 70°C). This is validated by timing parameter fclock (min = 70 MHz) and propagation delay tpd (max = 10 ns), ensuring reliable edge-triggered data capture in high-speed synchronous systems. The CD74FCT374M maintains this spec across its full commercial temperature range without derating.

How does the CD74FCT374M reduce electromagnetic interference (EMI)?

The CD74FCT374M reduces EMI through its BiCMOS output stage, which limits VOH to approximately 3.7 V (two diode drops below VCC). This controlled output swing minimizes power-bus ringing and suppresses VCC/ground bounce during simultaneous output switching. Additionally, its specified output edge rates and low Cpd (33 pF) further constrain high-frequency spectral content - directly addressing EMI concerns in industrial and test equipment designs using the CD74FCT374M.

Can CD74FCT374M drive standard TTL loads directly?

Yes, CD74FCT374M can drive standard TTL loads directly. Its 48-mA output sink current exceeds the 16-mA requirement of standard TTL, and its VOH (≥2.4 V at IOH = –15 mA) and VOL (≤0.55 V at IOL = 48 mA) meet TTL voltage thresholds. The CD74FCT374M also features buffered inputs compatible with TTL logic levels (VIH = 2 V, VIL = 0.8 V), eliminating level-shifting circuitry in mixed-logic systems.

What is the correct power-up sequence for CD74FCT374M to ensure outputs remain high-impedance?

To ensure high-impedance outputs during power-up, OE must be held high before VCC reaches valid operating voltage. TI recommends tying OE to VCC through a pull-up resistor; minimum value depends on driver sink capability but typically 4.7 kΩ suffices. This prevents bus contention during ramp-up and guarantees the CD74FCT374M enters a known tri-state condition - a critical requirement for hot-swap-capable systems using the CD74FCT374M.

Is CD74FCT374M compatible with 3.3-V logic systems?

No, CD74FCT374M is not compatible with 3.3-V logic systems. It is strictly a 5-V device with VCC operating range 4.75–5.25 V, VIH = 2 V (TTL-compatible), and VOH clamped to ~3.7 V - insufficient to reliably drive 3.3-V CMOS inputs requiring VIH ≥ 2.31 V. Using CD74FCT374M in a 3.3-V system risks logic-level misinterpretation and increased static power; level translators or 3.3-V-native alternatives like SN74LVC374A are required instead of CD74FCT374M.