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Texas Instruments CY74FCT273CTSOCTE4
- Part No.:
- CY74FCT273CTSOCTE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT273CTSOCTE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
CY74FCT273CTSOCTE4 from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with common clock (CP) and master-reset (MR) inputs, 5.8 ns maximum propagation delay, 64 mA sink / 32 mA source output drive, and SOIC-20 package. It operates across –40°C to +85°C and supports partial-power-down via Ioff, enabling safe bus-hold in mixed-voltage systems such as industrial control backplanes.
For engineers reviewing the CY74FCT273CTSOCTE4 datasheet, CY74FCT273CTSOCTE4 pinout, CY74FCT273CTSOCTE4 application, or CY74FCT273CTSOCTE4 equivalent, key selection criteria include TTL-compatible input thresholds, matched rise/fall times for EMI reduction, edge-rate control circuitry, Ioff-enabled power sequencing, and 5-V supply operation with 3.3-V logic-level compatibility.
Technical Context
This device implements eight synchronous D-type latches triggered on the low-to-high CP transition, with all Q outputs updated simultaneously based on D-input states sampled one setup time prior. The MR input asynchronously forces all Q outputs low, independent of CP timing.
It features edge-rate controlled outputs to minimize switching noise, Ioff circuitry that disables outputs when VCC = 0 V to prevent back-drive current, and full TTL input/output voltage level compatibility - including VIH = 2.0 V min and VOL = 0.55 V max at 64 mA sink - ensuring interoperability with legacy 5-V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 8-bit positive-edge-triggered D-type register with asynchronous master reset |
| Propagation Delay (tPLH/tPHL) | 5.8 ns max - enables reliable operation in 100-MHz clock domains with margin |
| Output Drive | 64 mA sink / 32 mA source - drives heavy capacitive loads or multiple TTL inputs without buffering |
| Ioff Support | Active at VCC = 0 V - prevents damaging current flow during hot-insertion or partial power-down |
| Supply Voltage Range | 4.75 V to 5.25 V - tight 5-V tolerance ensures stable timing and noise immunity in regulated systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and automation equipment |
| Input Compatibility | Fully TTL-compatible - accepts standard 5-V logic levels without level-shifting circuitry |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR (Master Reset) | Asynchronous active-low reset: forces all Q outputs low regardless of CP state |
| 2–9 | D0–D7 | Data inputs sampled on rising CP edge; latched into corresponding flip-flops |
| 10 | GND | Ground reference for all internal logic and output drivers |
| 11 | VCC | 5-V power supply; powers internal logic and output stages |
| 12–19 | Q0–Q7 | Registered outputs reflecting D-input states captured at last CP↑ transition |
| 20 | CP | Buffered clock input; rising-edge sensitive; controls simultaneous latch update |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Controlled Outputs | Reduces simultaneous switching noise (SSN) and EMI emissions by limiting dV/dt on output transitions |
| Matched Rise/Fall Times | Ensures symmetrical signal integrity in bidirectional data paths and reduces duty-cycle distortion |
| TTL-Compatible Input Thresholds | VIH = 2.0 V min / VIL = 0.8 V max - eliminates need for external level shifters in mixed-logic systems |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for robust board-level handling |
| Partial-Power-Down Support | Ioff limits leakage to ±1 µA when VCC = 0 V - enables safe insertion into live backplanes |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Latching sensor status or actuator commands from microcontroller GPIOs before driving high-current relay drivers. IC Role / Device Role / Timing Role: Synchronous data register providing glitch-free parallel output staging with deterministic setup/hold timing. Use Value: 5.8 ns propagation delay and 64 mA sink capability allow direct interface to ULN2003A drivers without added buffers. | Use Scenario: Isolating and synchronizing door-lock, window-lift, or lighting control signals between MCU and power FETs. IC Role / Device Role / Timing Role: Edge-triggered register ensuring command integrity during noisy vehicle electrical transients. Use Value: Ioff support enables safe hot-swap of control modules while main battery remains connected. |
| Legacy Bus Interface Bridge | Test Equipment Pattern Generator |
Use Scenario: Adapting modern FPGA I/O to legacy 5-V parallel buses (e.g., ISA, GPIB auxiliary lines) with timing-critical handshaking. IC Role / Device Role / Timing Role: Level-translating register maintaining TTL-compatible voltage margins and precise clock-aligned sampling. Use Value: Full TTL input/output compatibility and 2 ns setup/1.5 ns hold times meet strict ISA bus timing requirements. | Use Scenario: Generating stable, synchronized multi-bit stimulus patterns for IC functional testing under automated test equipment (ATE). IC Role / Device Role / Timing Role: Deterministic 8-bit pattern latch synchronized to system test clock with minimal skew. Use Value: Matched rise/fall times and low jitter (<0.5 ns typical) ensure clean, repeatable waveform edges for high-speed digital validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT273NSR | Same logic function, 7 ns max tPD, 32 mA sink/source, SOIC-20, identical pinout | Lower drive strength; suitable where load capacitance < 30 pF and fanout ≤ 10 TTL units | Select when cost sensitivity outweighs need for 64 mA drive or tighter timing margin. |
| 74AC273M | CMOS-based, 10 ns max tPD, 24 mA drive, wider 4.5–5.5 V supply range, same pinout | Higher static current, no Ioff, less noise-immune edge control | Choose only if system requires broader VCC tolerance and can accept reduced noise performance and no partial-power-down. |
Compared with SN74FCT273NSR and 74AC273M, CY74FCT273CTSOCTE4 delivers superior noise immunity via edge-rate control, higher sink current for direct driver interfacing, and guaranteed Ioff behavior critical for modular industrial systems - making it the preferred choice for robust, high-reliability 5-V register applications.
Availability
CY74FCT273CTSOCTE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, legacy bus interface bridges, and test equipment pattern generators requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for CY74FCT273CTSOCTE4 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 over 50 years of innovation in industrial, automotive, and communications markets.
CY74FCT273CTSOCTE4 belongs to the TI FCT logic family - engineered for high-speed, low-noise 5-V TTL-compatible digital interfacing in mission-critical industrial and automotive control systems.
FAQ
What is the maximum clock frequency supported by CY74FCT273CTSOCTE4?
CY74FCT273CTSOCTE4 has a maximum propagation delay of 5.8 ns, supporting reliable operation up to approximately 100 MHz in well-designed PCB layouts with controlled impedance and minimal capacitive loading. Actual maximum frequency depends on setup/hold timing margins, trace routing, and output load - design verification using the 2 ns setup and 1.5 ns hold specifications is required for 100-MHz use cases.
Does CY74FCT273CTSOCTE4 support partial-power-down mode?
Yes, CY74FCT273CTSOCTE4 fully supports partial-power-down mode via its Ioff circuitry. When VCC = 0 V, output leakage is limited to ±1 µA, preventing damaging back-current flow from powered bus lines into the unpowered device - a critical feature for hot-pluggable industrial backplanes and modular automotive ECUs.
Is CY74FCT273CTSOCTE4 pin-compatible with standard 74-series 273 registers?
Yes, CY74FCT273CTSOCTE4 uses the industry-standard 20-pin SOIC footprint and identical pinout to 74LS273, 74HC273, and 74AC273 devices - including MR on Pin 1, D0–D7 on Pins 2–9, GND on Pin 10, VCC on Pin 11, Q0–Q7 on Pins 12–19, and CP on Pin 20 - enabling drop-in replacement in most 5-V logic designs.
What is the purpose of the edge-rate control circuitry in CY74FCT273CTSOCTE4?
The edge-rate control circuitry in CY74FCT273CTSOCTE4 intentionally limits output slew rate to reduce simultaneous switching noise (SSN) and electromagnetic interference (EMI). This design feature improves signal integrity in dense PCB layouts and meets stringent CISPR-22 Class B emissions requirements without requiring external series resistors or ferrite beads.
Can CY74FCT273CTSOCTE4 operate with a 3.3-V supply?
No, CY74FCT273CTSOCTE4 is specified only for 4.75 V to 5.25 V operation per its recommended operating conditions. While its inputs are TTL-compatible (accepting 3.3-V logic highs), the core logic and output drivers require a 5-V supply to meet timing, drive, and noise specifications. For 3.3-V systems, consider TI's 74LVC273 or SN74AVC273 families instead.
CY74FCT273CTSOCTE4 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:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- 5.8ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- 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
CY74FCT273CTSOCTE4 FAQ
1.How can I place an order for CY74FCT273CTSOCTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT273CTSOCTE4 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 CY74FCT273CTSOCTE4 reliable?
The price and inventory of CY74FCT273CTSOCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT273CTSOCTE4 is usually 5 days.
3.What payment methods are accepted for CY74FCT273CTSOCTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT273CTSOCTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT273CTSOCTE4?
CY74FCT273CTSOCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT273CTSOCTE4 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 CY74FCT273CTSOCTE4?
For technical support, including CY74FCT273CTSOCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT273CTSOCTE4 requirements.
6.How does Aetrix verify that CY74FCT273CTSOCTE4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT273CTSOCTE4 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 CY74FCT273CTSOCTE4 meets industry standards.
7.What is the process for return or replacement of CY74FCT273CTSOCTE4?
All CY74FCT273CTSOCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT273CTSOCTE4, 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 CY74FCT273CTSOCTE4 part is unused and in its original packaging.
Return procedure for CY74FCT273CTSOCTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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