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Texas Instruments 74FCT2574CTSOCTE4
- Part No.:
- 74FCT2574CTSOCTE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74FCT2574CTSOCTE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,936
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Product details
Overview
74FCT2574CTSOCTE4 from Texas Instruments is an octal D-type flip-flop register with 3-state outputs, edge-triggered clock input (CP), and output-enable (OE) control. It operates at 5 V, delivers 15 mA source / 12 mA sink drive, features 25-Ω on-die series termination, and supports bus-oriented data latching in industrial control backplanes requiring noise-immune signal integrity.
For engineers reviewing the 74FCT2574CTSOCTE4 datasheet, 74FCT2574CTSOCTE4 pinout, 74FCT2574CTSOCTE4 application, or 74FCT2574CTSOCTE4 equivalent, key selection criteria include its 5.2 ns propagation delay, Ioff partial-power-down capability, matched rise/fall times, TTL-compatible logic levels, and SOIC-20 package layout optimized for high-density PCB routing.
Technical Context
This device implements eight independent D-type latches synchronized to the low-to-high transition of CP, with all outputs placed on one side of the SOIC-20 package and all inputs on the opposite side - a physical layout distinction from CY74FCT2374T. Its edge-rate control circuitry and integrated 25-Ω series resistors suppress transmission-line reflections without external components.
The Ioff feature disables outputs when VCC = 0 V, preventing backflow current during partial power-down. OE controls 3-state output enable/disable independently of flip-flop state retention, and the device maintains full TTL-level compatibility on both inputs and outputs across –40°C to +85°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation within standard 5 V ±5% rail tolerances. |
| Propagation Delay (tPLH/tPHL) | 2 ns to 5.2 ns - enables reliable 200 MHz system clocking with timing margin. |
| Output Drive | ±15 mA - supports direct driving of multiple TTL loads without buffering. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - guarantees robust noise immunity with TTL-compatible switching points. |
| 3-State Enable Time (tPZL) | 1.5 ns to 6.2 ns - allows fast bus arbitration and dynamic output contention avoidance. |
| Ioff Leakage | ±1 µA at VCC = 0 V - prevents damaging back-current during hot-swap or mixed-voltage sequencing. |
| ESD Protection | 2000-V HBM - meets industrial-grade handling requirements without external protection diodes. |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant green finish (CU NIPDAU), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | D0–D7 Data Inputs | Edge-triggered D inputs sampled on CP↑; each controls one flip-flop's stored value. |
| 9 | GND | Ground reference for all internal logic and output drivers. |
| 10 | VCC | 5 V supply pin; decoupling capacitor placement critical for noise suppression. |
| 11–18 | O0–O7 3-State Outputs | Outputs driven only when OE = L; high-impedance when OE = H - enables shared bus topology. |
| 19 | CP | Buffered clock input; low-to-high transition captures D-input states into registers. |
| 20 | OE | Active-low output-enable; asynchronous control of all O0–O7 states without affecting register contents. |
Key Features
| Feature | Design Value |
|---|---|
| On-die 25-Ω series termination | Reduces signal reflections on PCB traces up to 15 cm without discrete resistors. |
| Matched rise/fall times | Minimizes duty-cycle distortion in clock distribution and data capture paths. |
| Ioff partial-power-down support | Allows safe insertion/removal in live backplanes while other rails remain active. |
| TTL-compatible input/output levels | Direct interface with legacy 74LS/74ALS logic without level-shifting circuitry. |
| Edge-rate controlled outputs | Guarantees <10 ns slew rate to meet FCC Class B radiated emissions limits. |
Applications
| Industrial Backplane Bus | Test Equipment Data Capture |
|---|---|
Use Scenario: High-speed parallel data transfer between CPU and I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Octal register latches address/data bus signals synchronized to system clock edges. Use Value: 5.2 ns tPD and 25-Ω termination ensure clean signal integrity across 100 mm trace lengths at 200 MHz. | Use Scenario: Capturing parallel digital waveforms from DUTs in automated test systems. IC Role / Device Role / Timing Role: Input sampling register holding 8-bit status flags before serial upload to host controller. Use Value: Ioff support enables safe hot-plug module replacement without powering down entire test rack. |
| Legacy System Upgrade | Communications Frame Buffer |
Use Scenario: Replacing obsolete 74F574 in existing designs to reduce EMI without board rework. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical pinout and enhanced noise performance. Use Value: Identical SOIC-20 footprint and TTL logic compatibility allow direct substitution with no layout changes. | Use Scenario: Temporary storage of 8-bit segments in T1/E1 line interface framing logic. IC Role / Device Role / Timing Role: Synchronizing incoming channelized data to local clock domain before multiplexing. Use Value: 3-state outputs permit bidirectional bus sharing with framer and microcontroller over same data lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT2574ATSOCTE4 | Slower 6.5 ns max tPD; identical pinout, Ioff, and SOIC-20 package. | Suitable for cost-sensitive designs where 150 MHz max clock rate suffices. | Select when lower speed tolerance allows reduced power consumption (lower ICCD). |
| SN74FCT574N | Non-Ioff design; no partial-power-down support; same 5.2 ns tPD and SOIC-20 package. | Applicable only in fully powered systems without hot-swap or mixed-rail sequencing. | Choose only if Ioff is not required and legacy 74FCT574 footprint compatibility is prioritized. |
Compared with 74FCT2574CTSOCTE4, the CY74FCT2574ATSOCTE4 trades 1.3 ns of speed for lower dynamic power, while SN74FCT574N omits Ioff but retains identical timing - making 74FCT2574CTSOCTE4 optimal for noise-critical, hot-pluggable, or mixed-voltage industrial buses.
Availability
74FCT2574CTSOCTE4 is available at Aetrix Electronics and suitable for industrial automation backplanes, test equipment data acquisition, and legacy system upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for 74FCT2574CTSOCTE4 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 for industrial, automotive, and communications markets.
The 74FCT2574CTSOCTE4 belongs to TI's FCT logic family, engineered for high-speed, low-noise bus interfacing in industrial control and instrumentation systems where signal integrity and partial-power-down operation are essential.
FAQ
What is the maximum operating frequency supported by the 74FCT2574CTSOCTE4?
The 74FCT2574CTSOCTE4 supports a typical switching rate of 250 MHz, with guaranteed operation up to 200 MHz based on its 5.2 ns maximum propagation delay (tPLH/tPHL) and 4 ns minimum clock pulse width (tw). This allows reliable use in systems with 5 ns clock periods, provided setup (2 ns) and hold (1.5 ns) timing margins are maintained at the D inputs relative to CP↑.
Does the 74FCT2574CTSOCTE4 support partial-power-down operation?
Yes, the 74FCT2574CTSOCTE4 includes Ioff circuitry that disables outputs when VCC = 0 V, limiting leakage current to ±1 µA. This feature enables safe partial-power-down operation in mixed-voltage systems or hot-swap backplanes, preventing damaging back-current flow through the device when unpowered - a capability confirmed in the absolute maximum ratings and electrical characteristics tables of the official TI datasheet SCCS076.
Is the 74FCT2574CTSOCTE4 pin-compatible with older 74F574 or 74LS574 devices?
Yes, the 74FCT2574CTSOCTE4 is functionally and pinout-compatible with industry-standard 74F574 and 74LS574 octal D-type latches in SOIC-20 packages. Its pin assignments match the standard 20-pin layout: D0–D7 on pins 1–8, GND on pin 9, VCC on pin 10, O0–O7 on pins 11–18, CP on pin 19, and OE on pin 20 - enabling drop-in replacement in legacy designs without PCB modification.
What is the purpose of the 25-Ω output series resistors in the 74FCT2574CTSOCTE4?
The 25-Ω on-die series resistors in the 74FCT2574CTSOCTE4 dampen transmission-line reflections on PCB traces, reducing ringing and overshoot without requiring external termination components. This design feature directly improves signal integrity in high-speed bus applications, particularly for trace lengths exceeding 10 cm, and is specified in the ROUT parameter (20–40 Ω typical) under load conditions per the TI datasheet SCCS076.
Can the 74FCT2574CTSOCTE4 be used with 3.3 V logic systems?
No, the 74FCT2574CTSOCTE4 is designed exclusively for 5 V operation (4.75–5.25 V), with TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) and VOH ≈ 3.3 V output high level. While its outputs may interface with some 3.3 V inputs, it lacks 3.3 V supply support, and using it outside its specified VCC range violates absolute maximum ratings and risks unreliable operation or damage.
74FCT2574CTSOCTE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
- Max Propagation Delay @ V, Max CL:
- 5.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 15mA, 12mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Quiescent (Iq):
- 200 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74FCT2574CTSOCTE4 FAQ
1.How can I place an order for 74FCT2574CTSOCTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT2574CTSOCTE4 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 74FCT2574CTSOCTE4 reliable?
The price and inventory of 74FCT2574CTSOCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT2574CTSOCTE4 is usually 5 days.
3.What payment methods are accepted for 74FCT2574CTSOCTE4?
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4.How is shipping managed for 74FCT2574CTSOCTE4?
74FCT2574CTSOCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT2574CTSOCTE4 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 74FCT2574CTSOCTE4?
For technical support, including 74FCT2574CTSOCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT2574CTSOCTE4 requirements.
6.How does Aetrix verify that 74FCT2574CTSOCTE4 is sourced from the original manufacturer or authorized distributors?
All 74FCT2574CTSOCTE4 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 74FCT2574CTSOCTE4 meets industry standards.
7.What is the process for return or replacement of 74FCT2574CTSOCTE4?
All 74FCT2574CTSOCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT2574CTSOCTE4, 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 74FCT2574CTSOCTE4 part is unused and in its original packaging.
Return procedure for 74FCT2574CTSOCTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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