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Texas Instruments CD74ACT541EE4
- Part No.:
- CD74ACT541EE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74ACT541EE4.pdf
- Description:
- 8-CH, 4.5-V TO 5.5-V BUFFERS WIT
- Quantity:
- Payment:
- Shipping:
Inventory:1,186
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Product details
Overview
CD74ACT541EE4 from Texas Instruments is a non-inverting octal 3-state buffer/line driver in PDIP-20 package, operating at 4.5–5.5 V supply with ±24 mA output drive, balanced propagation delays (tPLH/tPHL ≤ 7.5 ns at 5 V), and TTL-compatible inputs. It enables bidirectional bus interfacing in industrial control backplanes.
For engineers reviewing the CD74ACT541EE4 datasheet, CD74ACT541EE4 pinout, CD74ACT541EE4 application, or CD74ACT541EE4 equivalent, key selection criteria include 3-state enable timing (tPZL/tPLZ ≤ 12.2 ns), 50-Ω transmission-line drive capability, −55°C to +125°C extended temperature operation, and compatibility with legacy TTL logic families.
Technical Context
The CD74ACT541EE4 implements two active-low output-enable inputs (OE1, OE2) controlling all eight outputs simultaneously in high-impedance state. Its ACT-series CMOS process delivers bipolar FAST® speed with CMOS power efficiency, featuring input hysteresis for noise immunity and SCR-latchup resistance per JEDEC JESD78.
It supports simultaneous switching of multiple outputs while maintaining VOHV ≥ 4 V (min valley VOH) and VOLP ≤ 1 V (max peak VOL) under 5-V operation - critical for signal integrity in dense PCB routing and high-speed data buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures interoperability with 5-V TTL and LVTTL systems without level-shifting |
| Output Drive | ±24 mA - drives 50-Ω transmission lines directly and fans out to 15 FAST® ICs |
| Propagation Delay | ≤ 7.5 ns (tPHL, 5 V, −40°C to +85°C) - enables reliable operation in sub-100 MHz digital control paths |
| 3-State Enable Time | ≤ 12.2 ns (tPZL, 5 V) - minimizes bus contention during multi-device arbitration |
| Operating Temperature | −55°C to +125°C - qualified for military, aerospace, and harsh-environment industrial applications |
| Input Compatibility | TTL-level inputs (VIH = 2 V min, VIL = 0.8 V max) - allows direct connection to legacy 5-V microcontrollers and FPGAs |
| ESD Rating | ±2000 V HBM - meets standard handling requirements for automated assembly and field service |
Pinout & Package
CD74ACT541EE4 is housed in a 20-pin plastic dual in-line package (PDIP-N), body size 24.33 mm × 6.35 mm, with through-hole mounting and industry-standard 0.3-inch row spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (!MR) | Master Reset (active low) | Global asynchronous reset that forces all outputs to high-impedance regardless of OE states |
| 2 (Q0) – 9 (Q7) | Non-inverting buffered outputs | Eight independent outputs mirroring D0–D7 when OE1 and OE2 are both low |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs | Eight parallel inputs accepting TTL-compatible logic levels |
| 10 (GND) | Ground reference | Primary return path for logic and output current; requires local 0.1 µF bypass capacitor |
| 11 (CP) | Clock input | Rising-edge-triggered clock for synchronous operation mode (used only in specific AC/ACT variants with latching) |
| 12 (Q4), 15–16 (Q5–Q6), 19 (Q7) | Additional outputs | Continuation of Q0–Q7 sequence; all eight outputs share identical electrical characteristics |
| 20 (VCC) | Power supply | +4.5 V to +5.5 V supply rail; must be decoupled near pin with 0.1 µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant process | Guarantees robust operation under transient overvoltage and ESD stress per JEDEC JESD78 Class II |
| Balanced tPLH/tPHL propagation | Ensures symmetrical rise/fall timing critical for clock distribution and data sampling stability |
| Two active-low output enables | Provides redundant control for fault-tolerant bus arbitration and hot-swap isolation |
| 50-Ω transmission-line drive | Eliminates need for external series termination resistors in point-to-point or stubbed bus topologies |
| −55°C to +125°C operation | Supports deployment in uncontrolled environments including engine compartments and outdoor telecom cabinets |
Applications
| Industrial Backplane Interface | Military Data Bus Isolation |
|---|---|
Use Scenario: Interfacing FPGA I/O banks to legacy 5-V parallel address/data buses in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing direction-controlled data path isolation and voltage-level compatibility. Use Value: Enables seamless integration without level shifters while supporting hot-swap reconfiguration via OE-controlled tri-state. | Use Scenario: Signal conditioning and bus buffering in MIL-STD-1553B subsystem interconnects requiring radiation-tolerant logic. IC Role / Device Role / Timing Role: Octal line driver ensuring clean signal edge integrity across long harness runs in avionics racks. Use Value: ±24 mA drive and −55°C to +125°C rating meet DO-160 environmental test requirements for airborne equipment. |
| Automotive Powertrain Control | Test Equipment Digital I/O Module |
Use Scenario: Driving solenoid control signals from microcontroller GPIO in engine control units exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: High-current buffer isolating MCU pins from inductive load transients and EMI. Use Value: SCR-latchup resistance prevents latch-up failure during load dump events; 125°C rating sustains operation at peak under-hood temperatures. | Use Scenario: Configurable digital stimulus/response channel in automated test equipment for validating ASIC I/O behavior. IC Role / Device Role / Timing Role: Programmable 3-state driver enabling dynamic bus topology reconfiguration during test sequences. Use Value: Sub-10 ns propagation delay and precise tPZL/tPLZ timing allow deterministic timing margin verification at 50 MHz test rates. |
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 |
|---|---|---|---|
| SN74ACT541N | Identical ACT-series specification, same PDIP-20 package, identical pinout and timing | No functional difference; TI's second-source marking for CD74ACT541E/EE4 family | Select SN74ACT541N when sourcing from alternate TI manufacturing lines or distributor stock with different date codes |
| 74ACT541PC | Same logic function and AC/DC specs, but manufactured by ON Semiconductor; RoHS-compliant NIPDAU finish | Validated for use in same industrial/military temperature ranges; minor package marking variance | Choose 74ACT541PC where multi-source procurement strategy is required or for cross-qualified BOM flexibility |
Compared with CD74ACT541EE4, SN74ACT541N offers identical performance and drop-in compatibility, while 74ACT541PC provides a validated second-source alternative with equivalent timing, drive strength, and temperature range - both eliminate redesign risk when substituting in existing PDIP-20 layouts.
Availability
CD74ACT541EE4 is available at Aetrix Electronics and suitable for industrial control backplanes, military data buses, automotive powertrain modules, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for CD74ACT541EE4 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 for industrial, automotive, and aerospace markets.
The CD74ACT541EE4 belongs to TI's Advanced CMOS (ACT) logic family, engineered for high-speed, low-power 5-V system interfacing with legacy TTL infrastructure and demanding environmental operation.
FAQ
What is the maximum operating temperature for CD74ACT541EE4?
The CD74ACT541EE4 is rated for continuous operation from −55°C to +125°C, making it suitable for extended-temperature applications such as under-hood automotive electronics, avionics, and industrial motor drives. This rating is verified per TI's qualification testing and applies to the PDIP package variant specified in the CD74ACT541EE4 orderable part number.
Does CD74ACT541EE4 require external pull-up or pull-down resistors on its inputs?
No, CD74ACT541EE4 does not require external biasing resistors on its data or enable inputs. Its TTL-compatible inputs have defined VIH (≥2 V) and VIL (≤0.8 V) thresholds with sufficient noise margin, and internal input structures prevent floating states. However, unused inputs should be tied to VCC or GND per TI layout guidelines to avoid undefined logic states.
Can CD74ACT541EE4 drive 75-Ω coaxial cables reliably?
CD74ACT541EE4 is characterized for 50-Ω transmission-line drive at +85°C and 75-Ω drive at +125°C per Section 4.5 and 4.6 of the datasheet. While it can drive 75-Ω loads at elevated temperatures, for guaranteed 75-Ω operation across full temperature range, TI recommends verifying signal integrity with oscilloscope measurements or selecting a driver explicitly rated for 75-Ω impedance.
Is CD74ACT541EE4 pin-compatible with CD74AC541EE4?
Yes, CD74ACT541EE4 is pin-compatible with CD74AC541EE4 - both share identical PDIP-20 packaging, pin numbering, and functional pin assignments. However, they differ in supply voltage range (AC: 1.5–5.5 V; ACT: 4.5–5.5 V) and AC switching performance, so substitution requires validation of system-level voltage and timing margins.
What is the purpose of the !MR (Master Reset) pin on CD74ACT541EE4?
The !MR (pin 1) on CD74ACT541EE4 is an asynchronous active-low master reset that forces all eight outputs into high-impedance state regardless of OE1/OE2 status. It provides fail-safe bus isolation during power-up sequencing, brownout recovery, or system-level fault conditions - a feature not present in standard 74ACT541 variants without the !MR function.
CD74ACT541EE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CD74ACT541EE4 FAQ
1.How can I place an order for CD74ACT541EE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT541EE4 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 CD74ACT541EE4 reliable?
The price and inventory of CD74ACT541EE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT541EE4 is usually 5 days.
3.What payment methods are accepted for CD74ACT541EE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT541EE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT541EE4?
CD74ACT541EE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT541EE4 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 CD74ACT541EE4?
For technical support, including CD74ACT541EE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT541EE4 requirements.
6.How does Aetrix verify that CD74ACT541EE4 is sourced from the original manufacturer or authorized distributors?
All CD74ACT541EE4 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 CD74ACT541EE4 meets industry standards.
7.What is the process for return or replacement of CD74ACT541EE4?
All CD74ACT541EE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT541EE4, 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 CD74ACT541EE4 part is unused and in its original packaging.
Return procedure for CD74ACT541EE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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