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Texas Instruments CD54HC574F
- Part No.:
- CD54HC574F
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
CD54HC574F.pdf
- Description:
- HIGH SPEED CMOS LOGIC OCTAL POSI
- Quantity:
- Payment:
- Shipping:
Inventory:2,494
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Product details
Overview
CD54HC574F from Texas Instruments is a high-speed CMOS octal D-type flip-flop with 3-state outputs, positive-edge clock triggering, and bus-driving capability (15 LSTTL loads). It operates from 2 V to 6 V, supports –55 °C to 125 °C, and delivers 15 ns typical propagation delay (VCC = 5 V, CL = 15 pF) in data latching applications for military-grade digital backplanes.
For engineers reviewing the CD54HC574F datasheet, CD54HC574F pinout, CD54HC574F application, or CD54HC574F equivalent, this device serves as a radiation-tolerant, wide-temperature latch for synchronous data capture, address/data bus isolation, and legacy TTL-compatible system interfacing where deterministic edge-triggered storage and high-impedance output control are required.
Technical Context
The CD54HC574F implements eight independent D-type flip-flops sharing a common clock (CP) and output enable (OE) control. Data is latched on the LOW-to-HIGH transition of CP; OE independently places all Q outputs in high-impedance state when HIGH - decoupling register operation from output gating. Its HC logic family ensures CMOS-level input thresholds and rail-to-rail output swing.
Designed for military applications, it features buffered inputs, balanced propagation/transition times, and fanout of 10 standard LSTTL loads or 15 bus-driver loads. Absolute maximum ratings include VCC up to 7 V and junction temperature to 150 °C, with guaranteed operation across the full –55 °C to 125 °C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HC (High-Speed CMOS), 2–6 V supply compatible with CMOS/TTL interface levels |
| Function | Octal D-type flip-flop with 3-state outputs, positive-edge triggered, common OE control |
| Propagation Delay (tPLH/tPHL) | 15 ns typical at VCC = 5 V, CL = 15 pF - enables reliable 60 MHz operation in synchronous systems |
| Operating Temperature | –55 °C to 125 °C - qualified for extended military and aerospace environments |
| Output Drive | 15 LSTTL loads - sufficient for direct termination of legacy parallel buses without external buffers |
| Input Thresholds | VIH = 3.15 V, VIL = 1.35 V at VCC = 4.5 V - ensures noise immunity ≥30% of VCC |
| Quiescent Current (ICC) | ≤160 μA max over full temperature range - supports low-power standby modes in battery-backed systems |
Pinout & Package
CD54HC574F is housed in a hermetically sealed 20-pin Ceramic Dual In-line Package (CDIP, J package), body size 26.92 mm × 6.92 mm, with through-hole mounting and SNPB (tin-lead) lead finish. Pinout conforms to TI's standard HC574 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CP) | Clock input | Positive-edge trigger for all eight D-flip-flops; synchronous data capture point |
| 2–9 (D0–D7) | Data inputs | Asynchronous parallel data inputs feeding respective flip-flop D terminals |
| 10 (GND) | Ground reference | Primary return path for logic and output current; must be low-impedance |
| 11–18 (Q0–Q7) | 3-state outputs | Registered outputs enabled/disabled by OE; high-impedance when OE = HIGH |
| 19 (OE) | Output enable | Active-LOW control (LOW = outputs enabled); independent of clock/register state |
| 20 (VCC) | Supply voltage | Power rail for logic core and output drivers; requires local 0.1 μF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Common 3-state output enable | Single OE pin controls all eight Q outputs simultaneously - simplifies bus arbitration and reduces control logic overhead |
| Wide supply range (2–6 V) | Supports mixed-voltage system integration and brown-out resilience without level shifters |
| High noise immunity (NIL/NIH = 30%) | Reduces susceptibility to EMI-induced glitches in noisy military/aerospace enclosures |
| Bus line driving capability | Directly drives 15 LSTTL loads - eliminates need for external bus transceivers in legacy designs |
| Extended temperature operation | Guaranteed functionality from –55 °C to 125 °C - suitable for unheated avionics bays and engine-mounted controllers |
Applications
| Avionics Data Acquisition | Military Communication Backplane |
|---|---|
Use Scenario: Capturing analog-to-digital converter (ADC) output words in real-time telemetry streams under vibration and thermal cycling. IC Role / Device Role / Timing Role: Synchronous latch holding 8-bit parallel ADC results until read by microcontroller via shared data bus. Use Value: Edge-triggered registration ensures deterministic sampling alignment; 3-state outputs prevent bus contention during CPU read cycles. |
Use Scenario: Isolating command and status signals between mission-critical subsystems in a fault-tolerant communication chassis. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling controlled data exchange between processor modules and I/O cards. Use Value: Common OE allows centralized bus arbitration; 15-LSTTL drive strength sustains signal integrity across 30-cm backplane traces. |
| Secure Embedded Control Unit | Ruggedized Industrial PLC I/O Module |
Use Scenario: Securing configuration registers against unintended writes during power-up sequencing or reset recovery. IC Role / Device Role / Timing Role: Holding critical security keys or boot parameters in tamper-resistant storage with controlled output enable timing. Use Value: Wide temperature range and hermetic CDIP package ensure retention integrity across environmental stress tests per MIL-STD-883. |
Use Scenario: Interfacing discrete sensor inputs (e.g., limit switches, pressure transducers) to a programmable logic controller CPU board. IC Role / Device Role / Timing Role: Parallel input latch capturing 8-channel status bits synchronized to master scan clock. Use Value: Buffered inputs reject EFT bursts per IEC 61000-4-4; 3-state outputs allow hot-swap I/O module insertion without bus disruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD54HC374F | Identical function and specs but different pinout: Q outputs and D inputs swapped in physical layout | Requires PCB redesign due to non-interchangeable pin mapping; same timing and drive capability | Select only if existing layout uses 374 pinout or legacy design reuse mandates identical footprint |
| CD54HCT574F | TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V); otherwise identical function, pinout, and packaging | Better suited for direct connection to legacy 5 V TTL logic without level translation | Choose when interfacing predominantly with LS-TTL or ALS-TTL families; not drop-in for pure CMOS systems |
Compared with CD54HC574F, CD54HC374F demands board-level rework for pin compatibility, while CD54HCT574F offers native TTL input compatibility at no cost to output performance or temperature range - making it preferable in mixed-logic legacy upgrades.
Availability
CD54HC574F is available at Aetrix Electronics and suitable for avionics data acquisition, military communication backplanes, and secure embedded control units requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for CD54HC574F 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and military-grade qualification.
The CD54HC574F belongs to TI's military-grade HC logic family, designed specifically for high-reliability applications demanding extended temperature operation, hermetic packaging, and compliance with MIL-PRF-38535 standards.
FAQ
What is the maximum clock frequency supported by the CD54HC574F?
The CD54HC574F supports a maximum clock frequency of 60 MHz under recommended conditions (VCC = 5 V, CL = 15 pF, TA = 25 °C). At full temperature range (–55 °C to 125 °C) and VCC = 5 V, fMAX is guaranteed at 20 MHz per switching characteristics table. This ensures robust timing margin in thermally stressed deployments where the CD54HC574F is commonly used.
Does the CD54HC574F have the same pinout as the CD54HC374F?
No, the CD54HC574F and CD54HC374F are functionally identical but feature different pinouts. The CD54HC574F places Q0–Q7 on pins 11–18 and D0–D7 on pins 2–9, whereas the CD54HC374F swaps these groups. Because of this, they are not pin-compatible, and substituting one for the other requires PCB layout modification - the CD54HC574F cannot be used as a drop-in replacement for the CD54HC374F.
What is the purpose of the OE pin on the CD54HC574F?
The OE (output enable) pin on the CD54HC574F is an active-LOW control that places all eight Q outputs into high-impedance state when driven HIGH. This allows the CD54HC574F to share a common data bus with other devices without contention. OE operates independently of the clock and register state, enabling dynamic bus isolation during CPU read/write cycles - a key requirement in the CD54HC574F's use in military backplane architectures.
Can the CD54HC574F operate at 3.3 V supply voltage?
Yes, the CD54HC574F supports VCC from 2 V to 6 V, including 3.3 V operation. At 3.3 V, input thresholds scale proportionally (VIH ≈ 2.31 V, VIL ≈ 0.99 V), and propagation delay increases to ~25 ns (typical, CL = 15 pF). All DC specifications remain valid, making the CD54HC574F suitable for mixed-voltage systems where 3.3 V logic interfaces with legacy 5 V peripherals - a common scenario in upgraded CD54HC574F deployments.
Is the CD54HC574F RoHS compliant?
No, the CD54HC574F is not RoHS compliant. It uses a tin-lead (SNPB) solder finish and is packaged in a ceramic dual in-line package (CDIP) intended for military and aerospace applications where leaded finishes are permitted and preferred for reliability. RoHS-compliant alternatives such as CD74HC574E (PDIP) or CD74HC574M (SOIC) exist but lack the extended temperature range and hermetic sealing of the CD54HC574F.
CD54HC574F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54HC
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 60 MHz
- Max Propagation Delay @ V, Max CL:
- 28ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- 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-CDIP
CD54HC574F FAQ
1.How can I place an order for CD54HC574F through Aetrix?
Please submit a Request for Quotation (RFQ) for CD54HC574F 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 CD54HC574F reliable?
The price and inventory of CD54HC574F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD54HC574F is usually 5 days.
3.What payment methods are accepted for CD54HC574F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD54HC574F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD54HC574F?
CD54HC574F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD54HC574F 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 CD54HC574F?
For technical support, including CD54HC574F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD54HC574F requirements.
6.How does Aetrix verify that CD54HC574F is sourced from the original manufacturer or authorized distributors?
All CD54HC574F 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 CD54HC574F meets industry standards.
7.What is the process for return or replacement of CD54HC574F?
All CD54HC574F units undergo pre-shipment inspection (PSI). If there is an issue with CD54HC574F, 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 CD54HC574F part is unused and in its original packaging.
Return procedure for CD54HC574F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD54HC574F Tags
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