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STMicroelectronics M74HC541RM13TR
- Part No.:
- M74HC541RM13TR
- Manufacturer:
- STMicroelectronics
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
M74HC541RM13TR.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,242
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Product details
Overview
M74HC541RM13TR from STMicroelectronics is a non-inverting octal bus buffer with 3-state outputs, designed for bidirectional data bus isolation in digital systems. It operates from 2V to 6V, delivers symmetrical 6mA drive capability (|IOH| = IOL), exhibits 9ns typical propagation delay at 6V, and supports industrial temperature range (–55°C to +125°C) - used in microcontroller peripheral interfacing and memory address/data bus control.
For engineers reviewing the M74HC541RM13TR datasheet, M74HC541RM13TR pinout, M74HC541RM13TR application, or M74HC541RM13TR equivalent, key selection criteria include 3-state enable logic (dual-input AND gate), TSSOP-20 package compatibility, high noise immunity (28% VCC), low quiescent current (4µA max), and pin-and-function compatibility with legacy 74-series 541 devices.
Technical Context
The device implements dual active-high output enable inputs (G1, G2) configured as an AND gate: both must be low for normal buffer operation; either high forces all eight Yn outputs into high-impedance state. Inputs and outputs are physically segregated on opposite sides of the TSSOP-20 package to simplify PCB routing and reduce crosstalk.
It uses silicon gate C2MOS technology to achieve rail-to-rail output swing, balanced tPLH/tPHL propagation delays, and input protection against ESD and transient overvoltage. DC input thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), ensuring robust logic-level compatibility across the full 2–6V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - supports mixed-voltage system interfacing (e.g., 3.3V MCU to 5V peripherals) |
| tPD (Typ.) | 9ns at VCC = 6V - enables high-speed bus buffering up to ~50 MHz clock domains |
| IOL / IOH | 6mA min - drives standard TTL loads and multiple CMOS inputs without external buffers |
| VNIH / VNIL | 28% VCC min - provides noise margin ≥1.2V at 3.3V and ≥1.7V at 6V supply |
| ICC (Max) | 4µA at TA = 25°C - ultra-low static power for battery-backed or always-on subsystems |
| Operating Temp | –55°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Input Capacitance | 5pF - minimizes capacitive loading on driving logic, preserving signal edge integrity |
Pinout & Package
TSSOP-20 package: 6.5mm × 4.4mm body, 0.65mm pitch, exposed pad not present, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | G1, G2 | Active-high 3-state enable inputs - AND logic: both low required for output pass-through |
| 2–9 | A1–A8 | Non-inverting data inputs - routed to opposite side of package for clean bus layout |
| 11–18 | Y1–Y8 | Buffered non-inverting outputs - high-impedance state when G1 or G2 is high |
| 10 | GND | Ground reference - decoupling capacitor placement critical near this pin |
| 20 | VCC | Positive supply - requires local 100nF ceramic bypass between pins 20 and 10 |
Key Features
| Feature | Design Value |
|---|---|
| Pin-and-function compatibility | Fully compatible with 74LS541 and 74HC541 in SOP/DIP - enables drop-in replacement in legacy designs |
| Input protection | Integrated diode clamps on all inputs - withstands ±20mA transient current per IEC 61000-4-2 Level 3 |
| Symmetrical drive strength | Matched |IOH| and IOL (6mA min) - ensures equal rise/fall times and reduced skew on parallel buses |
| Wide voltage operation | 2V–6V supply range - eliminates level shifters in mixed-voltage 3.3V/5V systems |
| Low power dissipation | CPD = 31pF - enables predictable dynamic power calculation: ICC(opr) = 31pF × VCC × fIN + ICC/8 |
Applications
| Microcontroller Bus Interface | Memory Address Latching |
|---|---|
Use Scenario: Isolating an ARM Cortex-M4 GPIO port from a shared 8-bit data bus connected to multiple peripherals. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer enabling time-multiplexed access to UART, SPI flash, and ADC registers. Use Value: Prevents bus contention during peripheral switching; 9ns tPD ensures timing closure at 25MHz bus clock. | Use Scenario: Driving address lines to SRAM and EPROM in a Z80-based embedded controller. IC Role / Device Role / Timing Role: Address bus driver with controlled enable timing to meet memory setup/hold requirements. Use Value: Dual G1/G2 enables synchronized latching via CPU control signals; 6mA drive sustains signal integrity over 10cm traces. |
| Industrial I/O Expansion | Digital Signal Routing |
Use Scenario: Expanding PLC digital input/output capacity using isolated optocoupler banks. IC Role / Device Role / Timing Role: Bidirectional bus isolator between field-side and controller-side logic domains. Use Value: High noise immunity (28% VCC) rejects 2kV EFT bursts; –55°C to +125°C rating suits cabinet-mounted operation. | Use Scenario: Routing configuration bits from FPGA configuration PROM to multiple ASICs on a backplane. IC Role / Device Role / Timing Role: Fan-out buffer distributing static control words with simultaneous 3-state disable. Use Value: Matched tPLH/tPHL (<±1ns skew) prevents metastability in multi-device enable sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC541PWR | Same logic function, 20-pin TSSOP, but TI's version specifies 7.8mA IOL at 6V vs. ST's 6mA min | Higher drive strength supports longer trace lengths; slightly higher ICC (8µA max) | Select when >6mA load drive is required and TI qualification is mandated |
| 74VHC541FT | Lower CPD (22pF), faster tPD (7.5ns typ), but narrower VCC range (2V–5.5V) | Not suitable for 6V systems; better for high-frequency, low-power portable designs | Select when operating at 3.3V with strict dynamic power budget and <8ns timing margin |
Compared with SN74HC541PWR and 74VHC541FT, M74HC541RM13TR offers broader supply voltage tolerance (up to 6V), superior high-temperature operation (+125°C), and tighter noise immunity spec - making it preferred for industrial and automotive bus isolation where voltage headroom and thermal robustness are critical.
Availability
M74HC541RM13TR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical diagnostic equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for M74HC541RM13TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities.
M74HC541RM13TR belongs to ST's high-speed HC logic family, engineered for reliable bus interface and signal conditioning in harsh-environment embedded systems where interoperability, noise resilience, and long-term supply stability are essential.
FAQ
What is the recommended decoupling strategy for M74HC541RM13TR?
Place a 100nF X7R ceramic capacitor between VCC (pin 20) and GND (pin 10), located ≤3mm from the pins. For systems with >10MHz switching activity, add a 10nF capacitor in parallel. Avoid shared vias between VCC and GND paths to minimize ground bounce during 3-state transitions.
Can M74HC541RM13TR drive a 50pF load at 6V while maintaining 9ns propagation delay?
Yes - the 9ns typical tPD is specified under AC test conditions of CL = 50pF, VCC = 6V, and input tr/tf = 6ns. Measured tPLH/tPHL remain within 14ns max across –55°C to +125°C when driving 50pF, confirming timing predictability in real-world bus loads.
How does the dual-enable (G1/G2) architecture improve system-level reliability?
The AND-gated enable logic prevents accidental bus release: both G1 and G2 must be asserted low to activate outputs. This eliminates spurious enable pulses caused by single-point noise glitches or reset sequencing errors - a key advantage over single-enable buffers in safety-critical control paths.
Is M74HC541RM13TR RoHS-compliant and halogen-free?
Yes - M74HC541RM13TR is manufactured in STMicroelectronics' RoHS-compliant, lead-free, and halogen-free processes. The TSSOP-20 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and carries the "E3" marking per ST's quality documentation.
M74HC541RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SO
M74HC541RM13TR FAQ
1.How can I place an order for M74HC541RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC541RM13TR 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 M74HC541RM13TR reliable?
The price and inventory of M74HC541RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC541RM13TR is usually 5 days.
3.What payment methods are accepted for M74HC541RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC541RM13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC541RM13TR?
M74HC541RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC541RM13TR 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 M74HC541RM13TR?
For technical support, including M74HC541RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC541RM13TR requirements.
6.How does Aetrix verify that M74HC541RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC541RM13TR 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 M74HC541RM13TR meets industry standards.
7.What is the process for return or replacement of M74HC541RM13TR?
All M74HC541RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC541RM13TR, 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 M74HC541RM13TR part is unused and in its original packaging.
Return procedure for M74HC541RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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