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Texas Instruments CY74FCT541ATSOC
- Part No.:
- CY74FCT541ATSOC
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT541ATSOC.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
CY74FCT541ATSOC from Texas Instruments is an 8-bit noninverting buffer/line driver with 3-state outputs, designed for memory address driving, clock distribution, and bus transceiver applications. It operates at 4.75–5.25 V, delivers 64 mA sink / 32 mA source drive, features Ioff partial-power-down support, and achieves 4.8 ns typical propagation delay (tPLH/tPHL) in SOIC-20 package.
For engineers reviewing the CY74FCT541ATSOC datasheet, CY74FCT541ATSOC pinout, CY74FCT541ATSOC application, or CY74FCT541ATSOC equivalent, this device serves as a TTL-compatible, high-drive, low-noise bus interface IC with edge-rate control, ESD robustness (>2000-V HBM), and guaranteed 3-state isolation during power-down.
Technical Context
The CY74FCT541ATSOC implements dual 3-state output enables (OEA and OEB) controlling eight independent noninverting buffer channels. Its FCT-family architecture ensures full TTL input/output voltage compatibility while delivering higher drive strength than standard FCT logic.
Edge-rate control circuitry shapes output transitions to reduce simultaneous switching noise, and the Ioff feature actively disables outputs when VCC = 0 V, limiting backflow current to ±1 µA - enabling safe hot-insertion and partial-power-down system operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - Ensures stable operation across industrial-grade 5 V rails with ±5% tolerance. |
| Output Drive | 64 mA sink / 32 mA source - Sufficient to drive heavy capacitive loads (e.g., >100 pF buses) without external buffers. |
| Propagation Delay | 1.5–8 ns (tPLH/tPHL) - Enables reliable timing in high-speed digital systems up to ~100 MHz data rates. |
| Ioff Current | ±1 µA at VCC = 0 V - Prevents damaging backfeed current during partial power-down or hot-swap events. |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - Meets stringent industrial handling and board-level reliability requirements. |
| Input Compatibility | TTL-level VIH = 2 V, VIL = 0.8 V - Directly interfaces with legacy TTL, NMOS, and CMOS logic without level shifters. |
| Package | SOIC-20 (DW), 7.5 mm × 12.8 mm - Standard surface-mount footprint compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
SOIC-20 (DW) package: 0.300-inch body width, gull-wing leads, RoHS-compliant NiPdAu plating, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEA) | Output Enable A | Active-low enable for D0–D3 → O0–O3; controls first 4 buffer channels independently. |
| 2–9 (D0–D7) | Data Inputs | Noninverting inputs for all 8 buffer channels; TTL-compatible thresholds ensure robust noise immunity. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and supply currents; must be low-impedance for signal integrity. |
| 11 (VCC) | Power Supply | +5 V supply rail; decoupling (0.1 µF ceramic + 10 µF bulk) required within 10 mm of pin. |
| 12 (OEB) | Output Enable B | Active-low enable for D4–D7 → O4–O7; enables independent control of second 4-channel group. |
| 13–20 (O0–O7) | 3-State Outputs | High-drive buffered outputs; enter high-impedance state when OEA or OEB = high (logic 1). |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting di/dt, improving signal integrity on shared buses. |
| Ioff partial-power-down support | Enables safe insertion/removal in live backplanes and multi-rail systems without latch-up risk. |
| Matched rise/fall times | Ensures symmetrical waveform edges, minimizing duty-cycle distortion in clock distribution paths. |
| 3.3 V–compatible VOH (typ. 3.3 V) | Allows direct interfacing with 3.3 V logic families while powered from 5 V supply - no level shifter needed. |
| Full TTL input/output compatibility | Eliminates need for external biasing or pull-ups when connecting to legacy 5 V TTL systems. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer isolating controller outputs and boosting fanout capability beyond MCU drive limits. Use Value: 64 mA sink current ensures clean signal edges across 10+ cm traces loaded with 50 pF per device, preventing setup/hold violations. |
Use Scenario: Distributing a master system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs). IC Role / Device Role / Timing Role: Low-skew, high-drive clock repeater maintaining signal integrity across parallel branches. Use Value: Matched rise/fall times and 4.8 ns max propagation delay preserve clock duty cycle and minimize jitter accumulation. |
| Bus Transceiver Interface | Hot-Swappable Module Control |
|
Use Scenario: Bidirectional data bus isolation between processor and peripheral modules in industrial PLC backplanes. IC Role / Device Role / Timing Role: 3-state enabled line driver/receiver managing direction and contention on shared data lanes. Use Value: Dual OE pins (OEA/OEB) allow independent gating of two 4-bit sub-buses, supporting flexible protocol framing. |
Use Scenario: Enabling/disabling I/O signals on a field-replaceable module inserted into a powered chassis. IC Role / Device Role / Timing Role: Ioff-enabled buffer preventing backfeed current when module VCC is unpowered during insertion. Use Value: ±1 µA Ioff leakage ensures no disruption to host system power rails or logic states during hot-swap sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT541ATSOCT | Same core logic, identical pinout and specs, but supplied in tape-and-reel (2000 pcs) vs. tube (25 pcs). | No functional difference; selected for high-volume SMT production requiring automated placement. | Choose CY74FCT541ATSOCT for reel-fed pick-and-place lines; CY74FCT541ATSOC remains optimal for prototyping and low-volume builds. |
| CY74FCT541CTSOC | Higher-speed variant: 4.1 ns max tPLH/tPHL (vs. 4.8 ns), same SOIC-20 package and drive strength. | Better suited for timing-critical paths where <5 ns propagation is mandatory (e.g., high-frequency memory controllers). | Select CY74FCT541CTSOC only if design requires sub-4.8 ns delay; otherwise CY74FCT541ATSOC offers better cost/performance balance. |
Compared with CY74FCT541ATSOCT, CY74FCT541ATSOC provides identical electrical performance in tube packaging for flexibility in small-batch use; versus CY74FCT541CTSOC, it trades 0.7 ns speed margin for broader availability and lower unit cost in industrial temperature grade.
Availability
CY74FCT541ATSOC is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, industrial backplane interfaces, and hot-swappable I/O modules requiring stable component supply over extended product lifecycles.
Supply support for CY74FCT541ATSOC 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 decades of heritage in high-reliability logic families.
The CY74FCT541ATSOC belongs to TI's FCT logic series - engineered for industrial and telecom infrastructure applications demanding robust noise immunity, precise timing, and seamless TTL interoperability.
FAQ
What is the maximum operating temperature range for CY74FCT541ATSOC?
The CY74FCT541ATSOC is rated for industrial operation from –40°C to +85°C ambient temperature, validated per TI's recommended operating conditions and qualified across full voltage (4.75–5.25 V) and load ranges. This range supports deployment in factory automation, outdoor communications equipment, and motor control enclosures without derating.
Does CY74FCT541ATSOC support hot-swap functionality?
Yes, CY74FCT541ATSOC supports hot-swap via its Ioff feature: when VCC = 0 V, output leakage is limited to ±1 µA, preventing damaging backflow current into powered downstream circuits. This allows safe insertion/removal in live backplanes - provided OE pins are held inactive (high) during power-off states.
Can CY74FCT541ATSOC drive 50 Ω transmission lines directly?
No - CY74FCT541ATSOC is not designed for 50 Ω line driving. Its 64 mA sink/32 mA source capability targets capacitive bus loads (e.g., 50–100 pF), not resistive termination. For 50 Ω point-to-point signaling, use dedicated line drivers like SN65LVDS1 or DS90LV047A instead of CY74FCT541ATSOC.
What is the meaning of "FCT541A" marking on CY74FCT541ATSOC?
"FCT541A" is the top-side laser marking for CY74FCT541ATSOC, indicating the FCT541 family and the "A" speed grade (4.8 ns max propagation delay). This marking aligns with TI's standardized logic family nomenclature and appears on all SOIC-packaged variants of this speed bin.
Is CY74FCT541ATSOC pin-compatible with CY74FCT541ATPC?
Yes - CY74FCT541ATSOC (SOIC-20) and CY74FCT541ATPC (PDIP-20) share identical pin functions and ordering logic (OEA, D0–D7, GND, VCC, OEB, O0–O7), though mechanical dimensions and thermal characteristics differ. PCB layout must match respective package footprints, but schematic symbol and net connectivity remain interchangeable.
CY74FCT541ATSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CY74FCT541ATSOC FAQ
1.How can I place an order for CY74FCT541ATSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT541ATSOC 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 CY74FCT541ATSOC reliable?
The price and inventory of CY74FCT541ATSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT541ATSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT541ATSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT541ATSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT541ATSOC?
CY74FCT541ATSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT541ATSOC 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 CY74FCT541ATSOC?
For technical support, including CY74FCT541ATSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT541ATSOC requirements.
6.How does Aetrix verify that CY74FCT541ATSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT541ATSOC 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 CY74FCT541ATSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT541ATSOC?
All CY74FCT541ATSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT541ATSOC, 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 CY74FCT541ATSOC part is unused and in its original packaging.
Return procedure for CY74FCT541ATSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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