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Texas Instruments CD74HC541M
- Part No.:
- CD74HC541M
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HC541M.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
CD74HC541M from Texas Instruments is a non-inverting octal buffer and line driver with three-state outputs, designed for bus interface and data routing in digital systems. It operates from 2 V to 6 V, delivers 9 ns typical propagation delay at 5 V/15 pF, drives up to 15 LSTTL loads, and supports –55℃ to 125℃ industrial/military temperature range.
For engineers reviewing the CD74HC541M datasheet, CD74HC541M pinout, CD74HC541M application, or CD74HC541M equivalent, this page provides verified functional identity, SOIC-20 package mapping, three-state control logic, bus driving capability, and direct substitution guidance against functionally aligned alternatives.
Technical Context
The CD74HC541M implements dual independent output-enable controls (OE1 and OE2) - either high forces all eight outputs into high-impedance state, while both low enables non-inverting data transmission. Its HC logic family ensures CMOS-level input compatibility and rail-to-rail output swing across 2–6 V supply.
It features buffered inputs for noise immunity, balanced tPLH/tPHL transition times, and low quiescent current (≤160 μA at 6 V over full temperature range). The device meets MIL-STD-883 Class B requirements when ordered as CD54HC541F variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Type | Non-inverting octal buffer with three-state outputs |
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and battery-powered operation |
| Propagation Delay | 9 ns typical at VCC = 5 V, CL = 15 pF - enables reliable timing in 100+ MHz bus cycles |
| Output Drive Strength | 15 LSTTL loads - sufficient for driving long PCB traces or multiple downstream inputs |
| Operating Temperature | –55℃ to 125℃ - qualified for aerospace, automotive under-hood, and industrial control environments |
| Input Noise Immunity | NIL/NIL = 30% of VCC at 5 V - resists EMI-induced false triggering in noisy environments |
| Power Dissipation Cap. | CPD = 48 pF - used to calculate dynamic power: PD = VCC² × fi × (CPD + CL) |
Pinout & Package
CD74HC541M is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with standard 0.65 mm lead pitch and RoHS-compliant NiPdAu lead finish. It conforms to JEDEC MO-153 and is rated MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs A0–A7 | Non-inverting input signals routed to corresponding outputs when enabled |
| 9, 10, 11, 12, 13, 14, 15, 16 | Three-State Outputs Y0–Y7 | High-drive, bidirectional-capable outputs disabled to high-Z when OE1 or OE2 is high |
| 17, 18 | Output Enables OE1, OE2 | Active-low dual enable logic - both must be low for output assertion |
| 19 | GND | Ground reference for logic and power domains |
| 20 | VCC | Positive supply rail (2–6 V); requires local 0.1-μF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Non-inverting data path | Preserves signal polarity across all eight channels - critical for address/data bus integrity |
| Dual output-enable control | Independent OE1/OE2 pins allow selective channel grouping or redundancy management |
| Bus-line driving capability | 15 LSTTL load drive strength eliminates need for external buffers in legacy TTL interfacing |
| Wide supply voltage range | 2–6 V operation enables direct use with 3.3 V microcontrollers and 5 V peripherals without level shifters |
| High noise immunity | 30% VCC noise margin at 5 V reduces susceptibility to ground bounce and crosstalk |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing microcontroller GPIOs to distributed I/O modules over 20-cm backplane traces. IC Role / Device Role / Timing Role: Non-inverting octal buffer isolating MCU from bus capacitance and enabling hot-swap-safe three-state control. Use Value: Eliminates signal degradation on long traces; dual OE pins allow synchronized shutdown during firmware updates. | Use Scenario: Driving door lock actuators, window lift motors, and mirror position sensors from a central BCM ASIC. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between 3.3 V ASIC outputs and 5 V-compatible relay drivers. Use Value: 2–6 V supply range allows direct 5 V operation; –55℃ to 125℃ rating ensures reliability in under-dash environments. |
| Military Data Acquisition System | Test Equipment Signal Routing |
Use Scenario: Multiplexing analog sensor readings through an FPGA-controlled digital bus in ruggedized field equipment. IC Role / Device Role / Timing Role: Three-state bus driver enabling time-division multiplexing of 8-channel ADC outputs onto shared data lines. Use Value: 9 ns propagation delay supports >50 MHz sampling clock synchronization; military-grade temp range ensures field deployment stability. | Use Scenario: Reconfigurable signal path selection in automated test fixtures handling mixed-voltage DUTs. IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent OE control for dynamic signal routing between instruments and devices. Use Value: Dual OE architecture permits glitch-free path switching; 15 LSTTL drive handles legacy instrument interfaces without added components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC244N | Same HC logic, identical 20-pin PDIP/SOIC footprint, but uses single OE (active-low) controlling all 8 outputs | Lacks dual-OE flexibility; suitable only where unified enable suffices | Select when board layout rework is constrained and grouped enable behavior is acceptable |
| CD74HCT541M | HCT variant: 4.5–5.5 V only, TTL-compatible inputs (VIH = 2 V min), same pinout and function | Required only when interfacing with legacy 5 V TTL logic families needing guaranteed VIH/VIL thresholds | Choose for strict LSTTL input compatibility; not drop-in if system operates below 4.5 V |
Compared with SN74HC244N and CD74HCT541M, CD74HC541M uniquely supports dual independent output enables and 2–6 V universal supply operation - making it optimal for flexible bus arbitration and mixed-voltage designs where per-group control and wide VCC tolerance are essential.
Availability
CD74HC541M is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, military data acquisition, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC541M 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The CD74HC541M belongs to TI's legacy high-speed CMOS logic family, engineered specifically for robust bus interfacing, level translation, and noise-immune signal routing in mission-critical systems operating across extreme temperatures.
FAQ
What is the maximum clock frequency supported by CD74HC541M?
The CD74HC541M is not a clocked device but a combinational buffer; its usable data rate depends on propagation delay and system timing margins. With 9 ns typical tPD at 5 V/15 pF, it supports clean signal edges up to ~50 MHz in well-terminated buses. For precise setup/hold analysis, refer to the CD74HC541M truth table and switching characteristics in Section 5.5 of the official datasheet.
Does CD74HC541M require external pull-up resistors on its outputs?
No, CD74HC541M does not require external pull-ups on its outputs. Its three-state outputs present high impedance (Z) when disabled and actively drive high or low when enabled. Pull-ups are unnecessary unless interfacing with open-drain systems - which CD74HC541M does not support natively.
Can CD74HC541M operate reliably at 3.3 V supply?
Yes, CD74HC541M operates reliably at 3.3 V. As an HC-family device, it is fully specified from 2 V to 6 V. At 3.3 V, VOH ≥ 3.15 V and VOL ≤ 0.1 V under CMOS loads, ensuring solid noise margins and compatibility with 3.3 V logic families without level shifting.
What is the thermal resistance (RθJA) of CD74HC541M in SOIC package?
The junction-to-ambient thermal resistance RθJA for CD74HC541M in SOIC (DW) package is 109.1°C/W, per TI's SCHS189E datasheet revision October 2022. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with PCB copper area and airflow.
Is CD74HC541M pin-compatible with CD74HCT541M?
Yes, CD74HC541M and CD74HCT541M share identical pinout, package dimensions, and functional block diagram. They differ only in input threshold specifications (HC: VIH = 3.15 V @ 4.5 V; HCT: VIH = 2 V min) and supply range (HC: 2–6 V; HCT: 4.5–5.5 V), making them mechanically interchangeable with electrical validation required per application.
CD74HC541M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74HC541M FAQ
1.How can I place an order for CD74HC541M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC541M 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 CD74HC541M reliable?
The price and inventory of CD74HC541M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC541M is usually 5 days.
3.What payment methods are accepted for CD74HC541M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC541M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC541M?
CD74HC541M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC541M 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 CD74HC541M?
For technical support, including CD74HC541M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC541M requirements.
6.How does Aetrix verify that CD74HC541M is sourced from the original manufacturer or authorized distributors?
All CD74HC541M 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 CD74HC541M meets industry standards.
7.What is the process for return or replacement of CD74HC541M?
All CD74HC541M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC541M, 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 CD74HC541M part is unused and in its original packaging.
Return procedure for CD74HC541M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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