My Inquiry
My Account
Texas Instruments CD74AC541EG4
- Part No.:
- CD74AC541EG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74AC541EG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,030
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74AC541EG4 from Texas Instruments is a non-inverting octal buffer/line driver with 3-state outputs and dual active-LOW output enables. It operates from 1.5 V to 5.5 V, delivers ±24 mA output drive, supports 50 Ω transmission-line driving, and features balanced propagation delays (e.g., 7.1 ns max at 5 V, −55°C to +125°C). It is used in bus interface and data routing applications within industrial control backplanes.
For engineers reviewing the CD74AC541EG4 datasheet, CD74AC541EG4 pinout, CD74AC541EG4 application, or CD74AC541EG4 equivalent, key selection criteria include its AC-series voltage flexibility (1.5–5.5 V), 3-state output control architecture, ±24 mA drive strength, thermal performance in PDIP packaging, and compatibility with FAST®-level timing without bipolar power penalties.
Technical Context
The CD74AC541EG4 implements RCA Advanced CMOS logic with SCR-latchup-resistant process design. Its functional mode relies on two independent active-LOW output enable inputs (OE1, OE2) controlling all eight non-inverting outputs simultaneously - enabling full bus isolation when asserted.
It exhibits balanced AC-series electrical characteristics: VIH/VIL thresholds scale with supply (e.g., VIH = 3.85 V min at VCC = 5.5 V), VOL ≤ 0.5 V at 24 mA sink, VOH ≥ 3.7 V at 24 mA source, and input leakage ≤ ±1 μA over full temperature range (−55°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5 V to 5.5 V - enables interoperability across mixed-voltage logic domains (e.g., 3.3 V microcontrollers driving 5 V peripherals) |
| Output Drive Current | ±24 mA per output - sufficient to directly drive 50 Ω transmission lines or fan out to 15 FAST® ICs |
| Propagation Delay | 6.2 ns typ. / 7.8 ns max (VCC = 5 V, TA = −55°C to +125°C) - supports high-speed bus buffering up to ~100 MHz clock-equivalent rates |
| 3-State Enable Propagation | tPZL/tPHZ ≤ 12 ns max - ensures rapid bus release for time-critical arbitration or multiplexing |
| Input Leakage Current | ±1 μA max (TA = −55°C to +125°C) - minimizes unintended biasing in high-impedance or battery-powered standby modes |
| ESD Rating (HBM) | ±2000 V - meets industrial handling requirements without additional protection circuitry |
| Operating Temperature | −55°C to +125°C - qualified for extended industrial and military-grade embedded systems |
Pinout & Package
CD74AC541EG4 is supplied in a 20-pin plastic dual in-line package (PDIP, N suffix), body size 24.33 mm × 6.35 mm, with through-hole mounting and industry-standard lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (!MR) | Master Reset (active-low) | Global asynchronous reset input; forces all outputs to high-impedance state regardless of OE1/OE2 status |
| 2 (Q0) – 9 (Q7) | Non-inverting buffered outputs | Eight 3-state outputs mirroring respective D0–D7 inputs when OE1 and OE2 are both low |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs | Eight independent TTL/CMOS-compatible inputs; no internal pull-up/down - must be externally biased if unused |
| 10 (GND) | Ground reference | Primary signal and power return path; requires low-inductance connection to minimize ground bounce during switching |
| 11 (CP) | Clock input | Rising-edge-triggered clock for synchronous operation mode; not used in basic buffer configuration but enables edge-aligned latching when required |
| 12–19 (Q4–Q7) | Additional outputs | Continuation of Q0–Q7 set; all eight outputs share identical electrical specs and 3-state control |
| 20 (VCC) | Power supply | Single-supply rail; requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin for stable high-frequency operation |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant CMOS process | Eliminates risk of destructive latchup under transient overvoltage or ESD events in harsh industrial environments |
| Balanced propagation delays | Ensures deterministic skew (<0.5 ns typical variation between outputs), critical for parallel bus integrity and setup/hold timing margins |
| 1.5 V to 5.5 V supply operation | Supports direct interfacing between legacy 5 V systems and modern low-voltage controllers without level-shifting circuitry |
| ±24 mA output drive | Enables single-device termination of 50 Ω PCB traces - reduces component count and layout complexity in high-speed routing |
| Two independent active-LOW output enables | Allows hierarchical bus control: OE1 may serve as primary enable while OE2 acts as fault-safety override or secondary domain isolation |
Applications
| Industrial Backplane Interface | Automated Test Equipment (ATE) Signal Routing |
|---|---|
Use Scenario: Isolating and buffering address/data buses between CPU modules and I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing bidirectional bus isolation with precise timing control via dual OE pins. Use Value: Enables hot-swap capability and prevents bus contention during module insertion/removal without external logic. | Use Scenario: Routing digital stimulus and response signals between pattern generators and device-under-test (DUT) sockets in semiconductor ATE systems. IC Role / Device Role / Timing Role: High-drive line driver ensuring clean signal edges across long PCB traces and connector paths. Use Value: Maintains signal fidelity at >50 MHz edge rates due to matched rise/fall times and low output impedance. |
| Military Data Acquisition Systems | Legacy Industrial Controller Upgrades |
Use Scenario: Interfacing radiation-tolerant FPGAs with analog-to-digital converter (ADC) front-ends in airborne telemetry units. IC Role / Device Role / Timing Role: Robust octal buffer operating across −55°C to +125°C with guaranteed parametric performance at extremes. Use Value: Eliminates need for derating or thermal margining in sealed, conduction-cooled enclosures. | Use Scenario: Replacing obsolete 74LS541 buffers in aging PLC chassis while retaining existing 5 V power rails and PCB footprints. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering lower power, higher noise immunity, and improved drive strength. Use Value: Reduces system power by >70% versus LS-TTL while maintaining full backward compatibility and qualification documentation. |
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 |
|---|---|---|---|
| SN74AC541N | Same AC logic family, identical pinout and DC specs; differs only in TI's internal part numbering and RoHS compliance marking | No functional difference; SN74AC541N is catalog-grade counterpart with identical thermal and timing behavior | Select SN74AC541N for new designs requiring standard TI catalog branding and simplified procurement tracking |
| CD74ACT541E | TTL-compatible input thresholds (VIH = 2.0 V min), 4.5–5.5 V only supply range, slightly faster propagation (7.5 ns max) | Requires strict 5 V supply; better suited for legacy TTL-system integration where input noise immunity is secondary to speed | Choose CD74ACT541E only when interfacing with older 5 V TTL logic families and maximum speed is prioritized over supply flexibility |
Compared with SN74AC541N, CD74AC541EG4 offers identical functionality with G4 suffix indicating green (lead-free) PDIP packaging; versus CD74ACT541E, it provides wider voltage range and superior noise margin at lower supplies - making it optimal for mixed-voltage industrial upgrades.
Availability
CD74AC541EG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, automated test equipment signal routing, military data acquisition systems, and legacy controller upgrades requiring stable component supply across extended temperature ranges.
Supply support for CD74AC541EG4 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 company specializing in analog and embedded processing solutions, with leadership in industrial, automotive, and aerospace markets.
CD74AC541EG4 belongs to TI's legacy CD74AC logic family, designed for robust, wide-supply-voltage digital interfacing in mission-critical industrial and defense systems where reliability across extreme temperatures is mandatory.
FAQ
What is the recommended bypass capacitor for CD74AC541EG4?
A 0.1 µF ceramic capacitor is recommended directly between VCC (pin 20) and GND (pin 10), placed as close as possible to the device. This minimizes high-frequency supply noise and prevents output instability during simultaneous switching of multiple outputs. For systems with multiple CD74AC541EG4 devices, each unit requires its own dedicated bypass capacitor; paralleling with a 1 µF capacitor is acceptable to suppress lower-frequency ripple.
Does CD74AC541EG4 support hot-swap operation?
Yes, CD74AC541EG4 supports hot-swap operation when used with proper power sequencing and current-limiting design. Its 3-state outputs can be forced into high-impedance via OE1/OE2 before power application, and its SCR-latchup-resistant process prevents destructive failure during live insertion. However, external series resistors on data lines and controlled ramp-up of VCC are still recommended to limit inrush current and ensure reliable initialization.
Can CD74AC541EG4 drive 50 Ω transmission lines directly?
Yes, CD74AC541EG4 is explicitly characterized to drive 50 Ω transmission lines, verified at +85°C with 75 Ω at +125°C. At VCC = 5 V and IO = ±24 mA, VOL ≤ 0.5 V and VOH ≥ 3.7 V meet the voltage swing requirements for clean 50 Ω line termination without external resistors - simplifying PCB layout and reducing component count in high-speed interconnects.
What is the function of the !MR (pin 1) input on CD74AC541EG4?
The !MR (Master Reset) input on CD74AC541EG4 is an asynchronous active-low control that forces all eight outputs into high-impedance state regardless of OE1/OE2 status. This provides fail-safe bus isolation during power-up, brownout, or system fault conditions. When !MR is high, normal 3-state operation resumes - allowing OE1/OE2 to control output states as specified in the truth table.
Is CD74AC541EG4 pin-compatible with 74LS541?
Yes, CD74AC541EG4 is pin-compatible with 74LS541 in the 20-pin PDIP package, sharing identical pin assignments for D0–D7, Q0–Q7, OE1, OE2, VCC, and GND. However, CD74AC541EG4 uses CMOS input thresholds and delivers higher output drive (±24 mA vs. ±8 mA), requiring no changes to PCB layout but enabling direct replacement with improved noise immunity and reduced power consumption.
CD74AC541EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- 1.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CD74AC541EG4 FAQ
1.How can I place an order for CD74AC541EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC541EG4 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 CD74AC541EG4 reliable?
The price and inventory of CD74AC541EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC541EG4 is usually 5 days.
3.What payment methods are accepted for CD74AC541EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC541EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC541EG4?
CD74AC541EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC541EG4 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 CD74AC541EG4?
For technical support, including CD74AC541EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC541EG4 requirements.
6.How does Aetrix verify that CD74AC541EG4 is sourced from the original manufacturer or authorized distributors?
All CD74AC541EG4 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 CD74AC541EG4 meets industry standards.
7.What is the process for return or replacement of CD74AC541EG4?
All CD74AC541EG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC541EG4, 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 CD74AC541EG4 part is unused and in its original packaging.
Return procedure for CD74AC541EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74AC541EG4 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
