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Texas Instruments CD74ACT574EG4
- Part No.:
- CD74ACT574EG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74ACT574EG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,051
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Product details
Overview
CD74ACT574EG4 from Texas Instruments is an octal D-type, 3-state, positive-edge-triggered flip-flop in SOIC-20 package, operating at 4.5–5.5 V with 2.9 ns typical propagation delay (tPLH/tPHL) and ±24 mA output drive. It latches data on clock rising edge and supports high-speed bus interfacing in industrial control and data acquisition systems.
For engineers reviewing the CD74ACT574EG4 datasheet, CD74ACT574EG4 pinout, CD74ACT574EG4 application, or CD74ACT574EG4 equivalent, key selection criteria include 3-state output enable timing (tPZL/tPHZ = 13.2 ns), ACT-series TTL-compatible inputs, 50 Ω transmission-line drive capability, and operation across –55°C to +125°C.
Technical Context
The CD74ACT574EG4 implements eight independent D flip-flops sharing a common clock (CLK) and active-low output enable (OE), enabling synchronized data capture and tri-state bus control. Its RCA Advanced CMOS process ensures SCR-latchup resistance and balanced propagation delays between Q outputs.
It operates strictly within the ACT series specification: 4.5–5.5 V supply, VIH ≥ 2.0 V, VIL ≤ 0.8 V, and guaranteed 125 MHz maximum clock frequency at TA = –40°C to +85°C. Output switching is characterized at CL = 50 pF with tr/tf = 3 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - defines compatible logic families (TTL/5V CMOS) and excludes AC-series 1.5–5.5 V operation |
| Propagation Delay (tPLH/tPHL) | 2.9 ns typ. @ 5 V, CL = 50 pF - enables <125 MHz synchronous bus operation with margin |
| Output Drive | ±24 mA per output - directly drives 50 Ω transmission lines or fans out to 15 FAST ICs |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures robust TTL-level compatibility without level-shifting |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and military environments |
| 3-State Enable Delay | tPZL/tPHZ = 13.2 ns max @ 5 V - determines minimum bus turnaround time in bidirectional interfaces |
Pinout & Package
CD74ACT574EG4 is supplied in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm (including pins), with body size 12.80 mm × 7.50 mm. Pin 1 is marked by a beveled corner or dot; pin 10 is GND and pin 20 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE (Pin 1) | Active-low 3-state enable | Drives all eight outputs to high-impedance when HIGH; critical for shared-bus arbitration |
| CLK (Pin 11) | Positive-edge clock input | Samples D inputs synchronously on rising edge; requires clean, low-jitter signal |
| 1D–8D (Pins 3,4,7,8,13,14,17,18) | Data inputs | Independent D inputs for each flip-flop; must be stable tSU = 2 ns before CLK rise |
| 1Q–8Q (Pins 2,5,6,9,12,15,16,19) | Registered outputs | Non-inverted Q outputs; three-state controlled by OE; CL = 50 pF load assumed |
| GND (Pin 10) | Ground reference | Primary return path for all I/O and internal logic; requires low-inductance PCB connection |
| VCC (Pin 20) | Power supply | 5 V nominal supply; bypass capacitor (0.1 µF) required adjacent to pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant CMOS process | Prevents destructive latch-up under transient overvoltage or ESD stress, enhancing system reliability in noisy environments |
| TTL-compatible input thresholds | VIH ≥ 2.0 V / VIL ≤ 0.8 V ensures direct interface with legacy 5 V TTL logic without level shifters |
| ±24 mA output drive | Supports driving 50 Ω transmission lines or loading up to 15 FAST-family ICs, reducing need for external buffers |
| Balanced propagation delays | Minimizes skew between parallel Q outputs (<1 ns variation), critical for synchronous bus timing integrity |
| Extended temperature range | –55°C to +125°C operation validated per MIL-PRF-38535, suitable for aerospace and downhole applications |
Applications
| Industrial PLC I/O Expansion | Test Equipment Digital Pattern Generator |
|---|---|
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using multiplexed backplane buses. IC Role / Device Role / Timing Role: CD74ACT574EG4 captures sensor status or actuator commands on clock edge and presents them via 3-state outputs to shared data bus. Use Value: Enables deterministic sampling at up to 125 MHz while isolating bus segments during reconfiguration-reducing bus contention and timing uncertainty. | Use Scenario: Generating precise, synchronized multi-bit stimulus waveforms for IC functional testing. IC Role / Device Role / Timing Role: CD74ACT574EG4 holds pattern data from controller memory and outputs it in parallel on each clock cycle under OE control. Use Value: Delivers sub-3 ns propagation delay and <1 ns inter-output skew, ensuring tight timing alignment across 8-bit test vectors. |
| Automotive Body Control Module | Communications Baseband Interface |
Use Scenario: Managing discrete switch inputs (door locks, seat controls) and LED driver enable signals in harsh automotive environments. IC Role / Device Role / Timing Role: CD74ACT574EG4 latches mechanical switch debounced states and drives LED sink drivers via 3-state outputs. Use Value: With –55°C to +125°C rating and SCR-latchup immunity, it withstands under-hood thermal cycling and load-dump transients without failure. | Use Scenario: Interfacing FPGA-based baseband processors with external ADC/DAC and memory in wireless infrastructure equipment. IC Role / Device Role / Timing Role: CD74ACT574EG4 acts as a registered bus interface, buffering address/data between FPGA and peripheral devices. Use Value: ±24 mA drive and 50 Ω line-drive capability allow direct connection to long PCB traces without termination resistors or repeaters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT574N | Different manufacturer (TI), identical ACT-series specs, PDIP-20 package only | Lacks SOIC-20 packaging; higher thermal resistance (RθJA = 50°C/W vs. 101.2°C/W for DW) | Select SN74ACT574N only if through-hole assembly or legacy PDIP footprint is required |
| 74ACT574SCX | Same function and pinout; manufactured by ON Semiconductor, SOIC-20, RoHS-compliant | Identical electrical specs but different MSL rating (Level-1 vs. Level-1-260C-UNLIM) and marking format | 74ACT574SCX is drop-in compatible for new designs where second-source assurance is needed |
Compared with CD74ACT574EG4, SN74ACT574N offers identical logic behavior but requires PCB redesign for PDIP mounting, while 74ACT574SCX provides full form-fit-function equivalence with verified qualification for industrial temperature range and lead-free assembly.
Availability
CD74ACT574EG4 is available at Aetrix Electronics and suitable for industrial control, test equipment, automotive body electronics, and communications infrastructure requiring stable component supply across extended temperature ranges.
Supply support for CD74ACT574EG4 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 company specializing in analog, embedded processing, and logic ICs, with leadership in high-reliability and industrial-grade components.
The CD74ACT574EG4 belongs to TI's 74ACT logic family, designed for high-speed, low-power 5 V digital systems requiring TTL compatibility, robust noise immunity, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by the CD74ACT574EG4?
The CD74ACT574EG4 supports a maximum clock frequency of 125 MHz at TA = –40°C to +85°C and VCC = 5 V, as specified in Section 4.9 of the datasheet. This value decreases to 110 MHz over the full –55°C to +125°C range due to increased propagation delay at temperature extremes. The CD74ACT574EG4 achieves this performance with 2.9 ns typical tPLH/tPHL and balanced timing characteristics.
Does the CD74ACT574EG4 support mixed-voltage operation with 3.3 V logic?
No, the CD74ACT574EG4 does not support 3.3 V operation. Its recommended supply voltage range is strictly 4.5 V to 5.5 V per Section 4.3 of the datasheet. For 3.3 V systems, the AC-series variant CD74AC574M96G4 (1.5–5.5 V) or dedicated level translators should be used instead of the ACT-series CD74ACT574EG4.
How is the output enable (OE) pin configured on the CD74ACT574EG4?
The OE pin (Pin 1) on the CD74ACT574EG4 is active-low: when OE is LOW, the eight Q outputs are enabled and reflect registered data; when OE is HIGH, all Q outputs enter high-impedance state. This behavior is confirmed in Table 3-1 (Pin Functions) and Section 6.3 (Device Functional Modes) of the CD74ACT574EG4 datasheet.
What package type and dimensions does the CD74ACT574EG4 use?
The CD74ACT574EG4 uses a 20-pin SOIC (DW) package with nominal dimensions 12.80 mm × 10.3 mm (including pins) and body size 12.80 mm × 7.50 mm. It is RoHS-compliant, moisture sensitivity level 1, and rated for peak reflow at 260°C. This matches the DW package drawing DW0020A referenced in TI's Mechanical Data.
Is the CD74ACT574EG4 suitable for automotive applications?
Yes, the CD74ACT574EG4 is suitable for automotive applications requiring extended temperature operation, as it is qualified for –55°C to +125°C and features SCR-latchup-resistant construction. While not AEC-Q100 certified out-of-box, its electrical and thermal specifications align with body control module and infotainment subsystem requirements-design validation per ISO 16750 and customer-specific stress testing is recommended.
CD74ACT574EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CD74ACT574EG4 FAQ
1.How can I place an order for CD74ACT574EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT574EG4 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 CD74ACT574EG4 reliable?
The price and inventory of CD74ACT574EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT574EG4 is usually 5 days.
3.What payment methods are accepted for CD74ACT574EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT574EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT574EG4?
CD74ACT574EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT574EG4 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 CD74ACT574EG4?
For technical support, including CD74ACT574EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT574EG4 requirements.
6.How does Aetrix verify that CD74ACT574EG4 is sourced from the original manufacturer or authorized distributors?
All CD74ACT574EG4 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 CD74ACT574EG4 meets industry standards.
7.What is the process for return or replacement of CD74ACT574EG4?
All CD74ACT574EG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT574EG4, 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 CD74ACT574EG4 part is unused and in its original packaging.
Return procedure for CD74ACT574EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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