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Texas Instruments CD74FCT574M
- Part No.:
- CD74FCT574M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
CD74FCT574M.pdf
- Description:
- BUS DRIVER, FCT SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:4,632
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Product details
Overview
CD74FCT574M from Texas Instruments is a BiCMOS octal edge-triggered D-type flip-flop with noninverted 3-state outputs, designed for bus interface and register applications. It operates at 4.75–5.25 V, supports 70 MHz clock frequency, delivers 48 mA sink current per output, limits VOH to 3.7 V for EMI reduction, and is rated for 0°C to 70°C operation.
For engineers reviewing the CD74FCT574M datasheet, CD74FCT574M pinout, CD74FCT574M application, or CD74FCT574M equivalent, key selection criteria include its 3-state bus-driving capability, controlled output edge rates, SCR latch-up resistance, low quiescent power, and compatibility with TTL-level inputs in 5-V systems.
Technical Context
The CD74FCT574M uses a hybrid BiCMOS process where bipolar transistors enable high-speed switching and CMOS elements reduce static power. Its output stage clamps VOH to ~3.7 V (two diode drops below VCC), minimizing VCC/ground bounce and electromagnetic interference during simultaneous switching.
Each of the eight D-type flip-flops triggers on the low-to-high CLK transition; data is latched synchronously while OE independently controls 3-state output enable/disable. The device features buffered inputs, input/output isolation from VCC, and supports bidirectional bus driving without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.75 V to 5.25 V - Ensures stable operation within standard 5-V TTL/CMOS system rails. |
| Max Clock Frequency | 70 MHz - Enables high-speed register transfer in data-path and control logic designs. |
| Output Sink Current (IOL) | 48 mA per pin - Drives heavy capacitive loads (e.g., backplane buses) without external buffers. |
| Propagation Delay (tpd) | 2 ns to 10 ns - Supports tight timing margins in synchronous digital systems. |
| Operating Temperature | 0°C to 70°C - Qualified for commercial-grade embedded and industrial control applications. |
| Input Clamp Voltage (VIK) | –1.2 V - Protects inputs against negative transients common in noisy bus environments. |
| Power Dissipation Cap. (Cpd) | 34 pF - Predicts dynamic power consumption at 1 MHz with no load, aiding thermal estimation. |
Pinout & Package
CD74FCT574M is housed in a 20-pin SOIC (DW package), 7.5 mm × 12.8 mm body, 2.65 mm max height, with 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-low control: asserts 3-state (high-Z) when high; enables normal Q outputs when low. |
| 2–9 (1D–8D) | Data Inputs | Asynchronous D inputs for each of eight flip-flops; buffered to reject noise and support TTL thresholds. |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output currents; decoupling critical near this pin. |
| 11 (CLK) | Clock Input | Edge-sensitive input triggering all eight registers simultaneously on rising edge (low-to-high transition). |
| 12–19 (1Q–8Q) | Noninverted Outputs | 3-state, BiCMOS-driven outputs; VOH limited to 3.7 V to suppress ringing and ground bounce. |
| 20 (VCC) | Supply Rail | +5 V supply; isolated from I/O paths to prevent coupling of switching noise into logic core. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Process | Combines speed of bipolar transistors with low static power of CMOS-enables 70 MHz operation at <80 µA ICC typical quiescent current. |
| Controlled Output Edge Rates | Slower than pure CMOS but faster than standard TTL-reduces EMI without sacrificing setup/hold timing margins. |
| SCR Latch-Up Resistance | Process and layout hardening prevents destructive latch-up under transient overvoltage or ESD events in 5-V systems. |
| Input/Output Isolation from VCC | Prevents supply-line noise from modulating logic thresholds or corrupting output states during heavy switching. |
| Bus-Direct 3-State Drive | Outputs drive PCB traces or backplanes directly-no series termination or level-shifting required in 5-V bus architectures. |
Applications
| Buffer Register | I/O Port Interface |
|---|---|
|
Use Scenario: Holding parallel data between microcontroller and peripheral ICs with asynchronous handshaking. IC Role / Device Role / Timing Role: Synchronous data latch acting as an input capture or output staging register synchronized to system clock. Use Value: Prevents metastability and ensures clean sampling of multi-bit signals across clock domains using single-edge registration. |
Use Scenario: Expanding GPIO count on an MCU with shared address/data bus and direction control. IC Role / Device Role / Timing Role: Bidirectional bus transceiver configured via OE and direction logic to isolate read/write paths. Use Value: Eliminates need for separate tristate buffers and direction controllers-reduces component count and board area. |
| Working Register File | Bus Line Driver |
|
Use Scenario: Storing intermediate computation results in a pipelined ALU or state machine controller. IC Role / Device Role / Timing Role: Edge-triggered storage element retaining values between pipeline stages with precise timing control. Use Value: Provides deterministic hold time (2 ns) and setup time (2 ns), enabling reliable 70-MHz throughput in combinatorial pipelines. |
Use Scenario: Driving long, unterminated PCB traces or ribbon cables connecting multiple boards in a rack system. IC Role / Device Role / Timing Role: High-current, low-EMI bus driver with slew-controlled outputs and 48-mA sink capability. Use Value: Limits voltage overshoot/ringing to <1 V peak-to-peak, reducing radiated emissions and improving signal integrity on 50-cm traces. |
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 |
|---|---|---|---|
| SN74F574N | Same function and pinout, but uses standard TTL (not BiCMOS); higher ICC (~60 mA), slower tpd (15 ns), no VOH clamping. | Lacks EMI suppression features; unsuitable for high-density or noise-sensitive layouts. | Choose only if legacy TTL compatibility is mandatory and EMI is not constrained. |
| 74ACT574SCX | Advanced CMOS variant; rail-to-rail VOH/VOL, 12 mA IOL, lower Cpd (22 pF), but no VOH limiting or SCR hardening. | Better power efficiency at low frequencies, but vulnerable to latch-up and bus ringing in high-capacitance loads. | Select when low static power and full-rail swing are prioritized over robustness in noisy 5-V bus environments. |
Compared with SN74F574N and 74ACT574SCX, the CD74FCT574M uniquely balances high-speed bus driving, EMI mitigation via VOH clamping, and latch-up immunity-making it optimal for industrial backplane and legacy-compatible control systems where reliability under transient stress matters.
Availability
CD74FCT574M is available at Aetrix Electronics and suitable for buffer register implementation, I/O port expansion, working register files, and bus line driving requiring stable component supply across commercial temperature ranges.
Supply support for CD74FCT574M 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 founded in 1930, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CD74FCT574M belongs to TI's FCT logic family-designed specifically for 5-V mixed-signal systems needing robust, low-noise, bus-oriented register functions with TTL-compatible inputs and BiCMOS performance.
FAQ
What is the maximum clock frequency supported by the CD74FCT574M?
The CD74FCT574M 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 rating is validated by timing parameters including minimum pulse width (7 ns) and propagation delay (2–10 ns), ensuring reliable edge-triggered operation in high-speed digital systems where the CD74FCT574M serves as a synchronous data latch.
Does the CD74FCT574M have true 5-V TTL-compatible inputs?
Yes, the CD74FCT574M accepts TTL-compatible input levels: VIH = 2.0 V min and VIL = 0.8 V max at VCC = 4.75–5.25 V. Its buffered inputs tolerate standard TTL output swings and provide noise margin against ground bounce, making the CD74FCT574M interoperable with legacy 74LS and 74F logic families without level translation.
Why does the CD74FCT574M limit VOH to 3.7 V instead of rail-to-rail?
The CD74FCT574M limits VOH to approximately 3.7 V (two diode drops below VCC) via its BiCMOS output stage to suppress power-bus ringing and minimize VCC/ground bounce during simultaneous switching. This intentional voltage swing reduction lowers EMI and improves signal integrity-especially critical when the CD74FCT574M drives highly capacitive bus lines in dense PCB layouts.
Is the CD74FCT574M pin-compatible with other octal D-type flip-flops like the 74LS374?
No, the CD74FCT574M is not pin-compatible with 74LS374. While both are 20-pin DIP/SOIC octal D flip-flops, the CD74FCT574M places OE on pin 1 and CLK on pin 11, whereas 74LS374 locates CLK on pin 11 but OE on pin 12. Always verify pin mapping using the official CD74FCT574M datasheet before substituting-pinouts differ across logic families even when functions appear similar.
What is the significance of SCR latch-up resistance in the CD74FCT574M?
SCR latch-up resistance in the CD74FCT574M means the device incorporates process-level and circuit-level hardening to prevent parasitic silicon-controlled rectifier conduction during voltage transients or ESD events. This feature ensures the CD74FCT574M remains functional and non-destructive in electrically noisy industrial environments-where unhardened logic devices might fail catastrophically under similar stress.
CD74FCT574M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CD74FCT574M FAQ
1.How can I place an order for CD74FCT574M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74FCT574M 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 CD74FCT574M reliable?
The price and inventory of CD74FCT574M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74FCT574M is usually 5 days.
3.What payment methods are accepted for CD74FCT574M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74FCT574M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74FCT574M?
CD74FCT574M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74FCT574M 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 CD74FCT574M?
For technical support, including CD74FCT574M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74FCT574M requirements.
6.How does Aetrix verify that CD74FCT574M is sourced from the original manufacturer or authorized distributors?
All CD74FCT574M 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 CD74FCT574M meets industry standards.
7.What is the process for return or replacement of CD74FCT574M?
All CD74FCT574M units undergo pre-shipment inspection (PSI). If there is an issue with CD74FCT574M, 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 CD74FCT574M part is unused and in its original packaging.
Return procedure for CD74FCT574M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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