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Texas Instruments CD74FCT541M
- Part No.:
- CD74FCT541M
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74FCT541M.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:905
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Product details
Overview
CD74FCT541M from Texas Instruments is a BiCMOS octal noninverting buffer/driver with 3-state outputs, designed for bus line driving and memory address register buffering. It delivers 64-mA sink current, limits output voltage swing to 3.7 V, features controlled edge rates to suppress EMI, and operates across 4.75–5.25 V at 0°C to 70°C.
For engineers reviewing the CD74FCT541M datasheet, CD74FCT541M pinout, CD74FCT541M application, or CD74FCT541M equivalent, key selection criteria include 3-state enable logic (dual active-low OE), BiCMOS low-power/high-drive tradeoff, VCC bounce mitigation via clamped VOH, and SOIC-20 package thermal performance (θJA = 58°C/W).
Technical Context
The CD74FCT541M implements dual active-low 3-state enable inputs (OE1, OE2) wired as an AND gate: either high forces all eight Y outputs into high-impedance. Its BiCMOS output stage combines bipolar pull-down and CMOS pull-up transistors, clamping VOH to ~VCC – 1.3 V (≤3.7 V at VCC = 5 V) to reduce simultaneous switching noise.
Input buffers are fully buffered with 10-pF input capacitance and TTL-compatible thresholds (VIL = 0.8 V, VIH = 2 V). Propagation delay is 2–8 ns (tpd), enable/disable times range 2–10 ns, and it exhibits SCR latch-up resistance per JEDEC JESD78.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.75 V to 5.25 V - Ensures compatibility with 5-V TTL/CMOS systems while maintaining noise margin. |
| IOL per Output | 64 mA - Enables direct drive of heavy capacitive loads or multiple TTL inputs without external buffers. |
| VOH Limit | Max 3.7 V at VCC = 5 V - Reduces VCC bounce and EMI by limiting high-level output swing. |
| tpd (A→Y) | 2 ns (min) to 8 ns (max) - Supports high-speed address/data bus operation up to ~125 MHz toggle rate. |
| θJA (SOIC) | 58°C/W - Allows sustained 8-output switching at ambient ≤70°C with minimal heatsinking. |
| Input Capacitance | 10 pF - Minimizes loading on upstream drivers and preserves signal integrity in fanout-heavy designs. |
| Quiescent ICC | 8 µA (min) to 80 µA (max) - Delivers BiCMOS power efficiency vs. pure bipolar equivalents. |
Pinout & Package
CD74FCT541M is housed in a 20-pin SOIC (DW) package, 7.6 mm × 12.83 mm footprint, 2.65 mm max height, moisture sensitivity level 1 (260°C reflow unlimited), with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-state enable inputs - AND logic: either high disables all Y outputs (high-Z). |
| 2–9 | A1–A8 | Noninverting data inputs - Directly routed to corresponding Y outputs when enabled. |
| 11–18 | Y1–Y8 | 3-state buffered outputs - Noninverted, 64-mA sink capable, VOH clamped to ≤3.7 V. |
| 10 | GND | Ground reference - Return path for all input/output currents and internal biasing. |
| 20 | VCC | Positive supply - Powers both CMOS and bipolar sections; output swing referenced to this rail. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process | Combines bipolar speed and CMOS low quiescent power - achieves 64-mA drive with <80 µA ICC. |
| Output voltage clamping | VOH limited to ≤3.7 V at VCC = 5 V - suppresses power-bus ringing and ground bounce during parallel switching. |
| Controlled edge rates | Internal slew control - reduces harmonic content and EMI without external RC networks. |
| SCR latch-up resistance | Qualified per JEDEC JESD78 - ensures robustness against transient-induced parasitic thyristor activation. |
| Input isolation from VCC | Buffered inputs decoupled from supply rail - prevents false triggering during VCC ramp-up/down. |
Applications
| Microprocessor Address Bus Driver | Memory Interface Buffer |
|---|---|
Use Scenario: Driving 20-bit address lines from a microprocessor to multiple SRAM or ROM chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting octal buffer with 3-state control synchronizing address latching and bus release. Use Value: 64-mA sink current ensures clean logic transitions across 100+ pF total bus capacitance; clamped VOH minimizes VCC droop during multi-bit address changes. |
Use Scenario: Isolating and strengthening address/data signals between a controller and dual-port RAM in embedded instrumentation. IC Role / Device Role / Timing Role: Bidirectional bus interface buffer enabling time-multiplexed read/write cycles via OE-controlled directionality. Use Value: Dual OE inputs allow independent gating of two 4-bit segments, supporting partial bus arbitration without full device disable. |
| Industrial PLC I/O Module | Digital Logic Level Translator |
Use Scenario: Interfacing 5-V TTL control logic to 3.3-V FPGA I/O banks via level-shifted, noise-immune signal paths. IC Role / Device Role / Timing Role: Unidirectional voltage-limited driver providing ESD-tolerant, slew-controlled signals to downstream logic. Use Value: 3.7-V VOH limit inherently protects 3.3-V inputs from overvoltage; 10-ns max tpd supports 50-MHz PLC scan cycles. |
Use Scenario: Converting legacy 5-V TTL logic levels to modern low-voltage ASICs while preserving timing integrity. IC Role / Device Role / Timing Role: Voltage-reducing buffer translating VIH/VIL thresholds without adding propagation delay skew. Use Value: Guaranteed VOH ≤3.7 V and VOL ≤0.55 V meet 3.3-V LVCMOS input requirements; matched tpd across all 8 channels ensures skew <1 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F541N | Same function but bipolar TTL process - higher ICC (30 mA typical), no VOH clamping, 25-mA IOL. | Lacks EMI suppression; unsuitable where VCC bounce or radiated emissions must be minimized. | Choose only if legacy TTL compatibility or extreme temperature range (–40°C to 85°C) is required. |
| 74ACT541SCX | Advanced CMOS - 24-mA IOL, rail-to-rail VOH, faster tpd (2.5 ns typ), but no VOH clamping or BiCMOS EMI control. | Higher speed and lower power, but increased simultaneous switching noise without external damping. | Select when maximum speed and lowest static power are critical, and board-level EMI mitigation is implemented separately. |
Compared with SN74F541N and 74ACT541SCX, the CD74FCT541M uniquely balances 64-mA drive, EMI-suppressing VOH clamping, and BiCMOS quiescent efficiency - making it optimal for noise-sensitive 5-V bus interfaces where layout constraints prevent added filtering.
Availability
CD74FCT541M is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and embedded bus interface designs requiring stable component supply and long-term manufacturability.
Supply support for CD74FCT541M 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 CD74FCT541M belongs to TI's FCT (Fast CMOS Technology) logic series, engineered for 5-V systems demanding low-noise, high-drive bus interfacing with TTL-compatible inputs and controlled signal integrity.
FAQ
What is the recommended power-up sequence for CD74FCT541M to ensure reliable 3-state behavior?
TI recommends tying OE1 and OE2 to VCC through a pullup resistor (value determined by driver sink capability) during power-up. This guarantees all outputs remain in high-impedance until valid logic levels stabilize, preventing bus contention. The CD74FCT541M's input isolation from VCC further enhances robustness during VCC ramp-up, making it less sensitive to sequencing than standard CMOS buffers.
Does CD74FCT541M support hot-swap or live-insertion applications?
No - the CD74FCT541M is not rated for hot-swap operation. Its absolute maximum ratings specify VCC from –0.5 V to 6 V and do not include I/O ruggedness for powered-backplane insertion. For hot-swap use, dedicated hot-swap controllers or buffers with Ioff protection (e.g., SN74LVC244A) are required instead of CD74FCT541M.
How does the 3.7-V VOH limit of CD74FCT541M affect compatibility with 5-V CMOS loads?
The CD74FCT541M's VOH is intentionally clamped to ≤3.7 V (at VCC = 5 V) to reduce EMI and VCC bounce - and remains fully compatible with 5-V CMOS inputs, which require only VIH ≥ 2.0 V. This design choice improves system-level noise immunity without sacrificing logic-level validity, distinguishing CD74FCT541M from unclamped alternatives.
Can CD74FCT541M drive multiple 74FCT inputs simultaneously without signal degradation?
Yes - with 64-mA sink current per output and 10-pF input capacitance, the CD74FCT541M can reliably drive ≥10 standard 74FCT inputs (each ~5 pF) across typical PCB trace lengths. Its controlled edge rates and low output impedance minimize reflections, and the 2–8 ns tpd ensures timing margins hold even under worst-case fanout and temperature conditions for CD74FCT541M.
Is there a pin-compatible SOIC replacement for CD74FCT541M with extended temperature range?
No - the CD74FCT541M is specified for 0°C to 70°C. While the same pinout exists in TI's CD74HCT541M (–40°C to 85°C), it uses HCMOS technology with only 4-mA IOL and no VOH clamping, making it functionally distinct. There is no drop-in SOIC-20 replacement for CD74FCT541M offering identical BiCMOS drive, EMI control, and extended temperature rating.
CD74FCT541M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 15mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74FCT541M FAQ
1.How can I place an order for CD74FCT541M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74FCT541M 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 CD74FCT541M reliable?
The price and inventory of CD74FCT541M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74FCT541M is usually 5 days.
3.What payment methods are accepted for CD74FCT541M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74FCT541M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74FCT541M?
CD74FCT541M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74FCT541M 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 CD74FCT541M?
For technical support, including CD74FCT541M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74FCT541M requirements.
6.How does Aetrix verify that CD74FCT541M is sourced from the original manufacturer or authorized distributors?
All CD74FCT541M 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 CD74FCT541M meets industry standards.
7.What is the process for return or replacement of CD74FCT541M?
All CD74FCT541M units undergo pre-shipment inspection (PSI). If there is an issue with CD74FCT541M, 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 CD74FCT541M part is unused and in its original packaging.
Return procedure for CD74FCT541M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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