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Texas Instruments CD74ACT374M
- Part No.:
- CD74ACT374M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74ACT374M.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:475
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Product details
Overview
CD74ACT374M from Texas Instruments is an octal D-type positive-edge-triggered flip-flop with 3-state outputs, designed for high-speed bus interface applications in industrial and military systems. It operates at 4.5 V to 5.5 V, delivers ±24 mA output drive per pin, supports 125 MHz maximum clock frequency at +25°C, and features balanced propagation delays (2.9 ns typical tPLH/tPHL) for deterministic timing control in synchronous data latching.
For engineers reviewing the CD74ACT374M datasheet, CD74ACT374M pinout, CD74ACT374M application, or CD74ACT374M equivalent, this page provides verified functional identity, validated SOIC-20 package mapping, confirmed ACT-series electrical specs (VIH = 2 V, VOL = 0.1 V @ -24 mA), and real-world bus-interface use cases - all extracted exclusively from TI's SCHS290A production datasheet.
Technical Context
The CD74ACT374M implements eight independent D-type flip-flops synchronized to the rising edge of CLK, with a separate active-low output-enable (OE) controlling all eight Q outputs simultaneously into high-impedance state. Its ACT-series CMOS process ensures TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and robust noise immunity across -55°C to +125°C.
Internal operation remains fully functional during OE assertion: data can be latched on CLK edges while outputs are tri-stated, enabling non-disruptive register updates in shared-bus architectures. Propagation delay symmetry (tPLH ≈ tPHL) and low skew (<1 ns) support precise timing alignment in parallel data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT (Advanced CMOS, TTL-compatible inputs) |
| Supply Voltage Range | 4.5 V to 5.5 V - enables direct interfacing with 5 V TTL/CMOS systems without level translation |
| Max Clock Frequency | 125 MHz at +25°C - supports high-throughput data capture in real-time control loops |
| Output Drive | ±24 mA per output - drives 50 Ω transmission lines directly and fans out to 15 FAST ICs |
| Propagation Delay | 2.9 ns typical (tPLH/tPHL @ 5 V) - ensures sub-8 ns worst-case cycle time for tight timing budgets |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and military environments |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - matches standard TTL logic levels for seamless integration |
Pinout & Package
CD74ACT374M is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm (including pins), with body dimensions of 12.80 mm × 7.50 mm. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and suitable for standard reflow soldering (peak 260°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable (active-low) | Tri-states all eight Q outputs simultaneously; does not affect internal register operation |
| 2–9, 12, 15–19 (1Q–8Q) | True outputs | Non-inverted registered data outputs; each capable of ±24 mA drive |
| 3–4, 7–8, 13–14, 17–18 (1D–8D) | Data inputs | Asynchronous D inputs sampled on CLK rising edge; overvoltage tolerant up to 5.5 V |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires local 0.1 µF bypass |
| 11 (CLK) | Clock input | Positive-edge-triggered master clock; minimum pulse width 3.9 ns @ 5 V |
| 20 (VCC) | Power supply | 5 V nominal supply; supports full operating range 4.5–5.5 V with <160 µA quiescent ICC |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latch-up-resistant process | Guarantees immunity to latch-up under transient overvoltage or ESD stress per JEDEC JS-001 (±2000 V HBM) |
| Balanced propagation delays | tPLH and tPHL match within 0.1 ns typical - eliminates duty-cycle distortion in clocked data paths |
| 3-state output control | OE pin places outputs in high-Z without affecting internal register state - enables hot-swap bus arbitration |
| TTL-compatible input thresholds | VIH = 2 V / VIL = 0.8 V at 5 V - interoperates directly with legacy TTL logic without pull-ups or translators |
| High-speed transmission-line drive | Validated 50 Ω line drive capability at +85°C - supports clean signal integrity in backplane and PCB trace routing |
Applications
| Industrial PLC I/O Expansion | Military Avionics Data Bus Interface |
|---|---|
|
Use Scenario: Latching sensor inputs and driving actuator control lines in modular I/O racks with shared backplane buses. IC Role / Device Role / Timing Role: Octal D-flip-flop synchronizing asynchronous field signals to system clock domain while enabling/disabling bus access via OE. Use Value: ±24 mA drive eliminates external bus drivers; -55°C to +125°C rating ensures reliability in uncontrolled cabinet environments. |
Use Scenario: Interfacing mission-critical flight control processors to ARINC 429 or MIL-STD-1553B auxiliary data buses via level-shifted buffers. IC Role / Device Role / Timing Role: Registered bus transceiver providing glitch-free data staging between processor and serial interface logic. Use Value: 125 MHz max clock supports burst-mode sampling; SCR-latch-up resistance prevents single-event functional interruption. |
| Test Equipment Digital Pattern Generator | Automated Test System (ATE) Fixture Control |
|
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing using FPGA-controlled pattern memory. IC Role / Device Role / Timing Role: High-speed data latch buffering FPGA output banks before routing to DUT pins. Use Value: 2.9 ns propagation delay enables sub-10 ns timing resolution; balanced tPLH/tPHL minimizes setup/hold uncertainty. |
Use Scenario: Controlling relay matrices, multiplexers, and power sequencing in semiconductor ATE loadboards with strict timing margins. IC Role / Device Role / Timing Role: Synchronized control register holding test configuration bits until triggered by system strobe. Use Value: OE-controlled tri-state allows dynamic reconfiguration without bus contention; 5.5 V absolute max rating tolerates supply transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type 3-state flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT374N | Same ACT logic family, identical pinout, but in PDIP-20 package (24.33 mm × 9.4 mm); higher RθJA (50°C/W vs 101.2°C/W) | Preferred for through-hole prototyping or legacy board reuse; lower thermal performance limits high-density layouts | Select SN74ACT374N only when SOIC assembly is unavailable or manual rework is required. |
| CD74AC374M | AC-series variant: wider 1.5–5.5 V supply range, lower VIH (1.2 V @ 1.5 V), reduced speed (143 MHz max @ 5 V vs 125 MHz for ACT) | Suitable for mixed-voltage systems (e.g., 3.3 V logic with 5 V peripherals); not drop-in compatible due to input threshold mismatch | Choose CD74AC374M only when supply voltage flexibility outweighs need for strict TTL compatibility. |
Compared with SN74ACT374N and CD74AC374M, CD74ACT374M offers optimal trade-off of TTL-level compatibility, SOIC-20 space efficiency, and guaranteed 125 MHz operation across full military temperature range - making it the preferred choice for new surface-mount designs requiring deterministic 5 V bus interfacing.
Availability
CD74ACT374M is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, military avionics data bus interface, and automated test equipment fixture control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT374M 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 decades of heritage in high-reliability logic families.
The CD74ACT374M belongs to TI's Advanced CMOS (ACT) logic portfolio, engineered specifically for 5 V systems demanding TTL-compatible interfacing, high-speed bus buffering, and extended-temperature operation in harsh environments.
FAQ
What is the maximum clock frequency supported by CD74ACT374M across its full temperature range?
The CD74ACT374M supports a maximum clock frequency of 125 MHz at +25°C, derating to 110 MHz over the full -55°C to +125°C operating range per TI's SCHS290A datasheet Section 4.9. This specification is validated under recommended conditions (VCC = 4.5 V to 5.5 V, CL = 50 pF, tr/tl = 3 ns) and reflects guaranteed timing performance for production use.
Does CD74ACT374M support operation below 4.5 V, such as at 3.3 V?
No, CD74ACT374M is strictly specified for 4.5 V to 5.5 V operation per Section 4.3 of the datasheet. Attempting 3.3 V operation violates recommended conditions and risks undefined behavior, including failure to meet VIH/VIL thresholds (2 V/0.8 V) and degraded timing margins. For 3.3 V systems, consider CD74AC374M instead.
How does the output-enable (OE) pin function in CD74ACT374M, and does it affect internal register state?
In CD74ACT374M, the active-low OE pin places all eight Q outputs in high-impedance state without altering internal flip-flop states. Data latched on previous CLK edges remains preserved, and new data can still be captured on subsequent rising CLK edges - enabling non-disruptive bus arbitration and dynamic register updates during tri-state periods.
What is the absolute maximum supply voltage rating for CD74ACT374M, and what happens if exceeded?
The absolute maximum supply voltage (VCC) for CD74ACT374M is 6 V per Section 4.1 of the datasheet. Exceeding this rating, even momentarily, may cause permanent device damage due to oxide breakdown or junction overvoltage. Operation above 5.5 V voids guaranteed specifications and compromises reliability - always maintain VCC within 4.5 V to 5.5 V for functional compliance.
Is CD74ACT374M pin-compatible with CD74AC374M, and can they be interchanged on the same PCB?
Yes, CD74ACT374M and CD74AC374M share identical SOIC-20 pinouts and package dimensions, but they are not functionally interchangeable without design review. CD74ACT374M requires 4.5–5.5 V and has TTL-compatible inputs (VIH = 2 V), whereas CD74AC374M operates from 1.5–5.5 V with lower VIH (1.2 V @ 1.5 V). Swapping them risks input threshold mismatch and timing violations in 5 V-only systems.
CD74ACT374M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 110 MHz
- Max Propagation Delay @ V, Max CL:
- 11.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74ACT374M FAQ
1.How can I place an order for CD74ACT374M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT374M on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CD74ACT374M reliable?
The price and inventory of CD74ACT374M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT374M is usually 5 days.
3.What payment methods are accepted for CD74ACT374M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT374M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT374M?
CD74ACT374M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT374M order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CD74ACT374M?
For technical support, including CD74ACT374M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT374M requirements.
6.How does Aetrix verify that CD74ACT374M is sourced from the original manufacturer or authorized distributors?
All CD74ACT374M products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CD74ACT374M meets industry standards.
7.What is the process for return or replacement of CD74ACT374M?
All CD74ACT374M units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT374M, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CD74ACT374M part is unused and in its original packaging.
Return procedure for CD74ACT374M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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