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STMicroelectronics 74VHCT541AMTR
- Part No.:
- 74VHCT541AMTR
- Manufacturer:
- STMicroelectronics
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74VHCT541AMTR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,693
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Product details
Overview
74VHCT541AMTR from STMicroelectronics is an octal non-inverting bus buffer with 3-state outputs, designed for bidirectional data bus interfacing in 5V TTL-compatible digital systems. It features 4.1 ns typical propagation delay, ±8 mA symmetrical output drive, 4 µA max quiescent current at 25°C, and operates across 4.5–5.5 V supply range. Used in memory address/data buffering and microcontroller peripheral expansion.
For engineers reviewing the 74VHCT541AMTR datasheet, 74VHCT541AMTR pinout, 74VHCT541AMTR application, or 74VHCT541AMTR equivalent, key selection criteria include TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V), power-down protection on all I/Os, high-impedance leakage < ±2.5 µA, and SO-20 package compatibility with legacy 74-series layouts.
Technical Context
This device implements dual active-low enable logic (G1 and G2) controlling eight independent non-inverting buffers; both enables must be low for output assertion. Its C2MOS process delivers latch-up immunity and ESD robustness (2 kV HBM) without external protection.
The pinout separates inputs (pins 2–9) and outputs (pins 11–18) on opposite sides of the SO-20 package to minimize PCB crosstalk. All I/Os tolerate 0–7 V regardless of VCC, enabling safe hot-insertion and mixed-voltage domain interfacing (e.g., 5V-to-3V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation under industrial-grade 5V rail tolerances. |
| tPD (Typ.) | 4.1 ns at VCC = 5 V, CL = 15 pF - Enables high-speed data transfer in 25 MHz+ bus systems. |
| IOL / IOH | ±8 mA min - Drives standard TTL loads and multiple CMOS inputs without external buffers. |
| ICC (Max) | 4 µA at TA = 25°C - Supports ultra-low static power in battery-backed or standby-critical designs. |
| VIH / VIL | 2.0 V min / 0.8 V max - Guarantees reliable recognition of TTL-level signals across temperature. |
| VOLP (Max) | 0.9 V at CL = 50 pF - Limits ground bounce during simultaneous switching, improving signal integrity. |
| IOZ (Max) | ±2.5 µA over -55°C to +125°C - Maintains high-impedance state integrity in extended-temperature environments. |
Pinout & Package
74VHCT541AMTR is housed in a 20-pin Small Outline Package (SO-20), 7.6 mm × 13.0 mm body, 1.27 mm pitch, JEDEC MS-013 compliant. Pin layout supports optimized PCB routing with inputs on left side (pins 2–9) and outputs on right side (pins 11–18).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | G1, G2 | Active-low 3-state enable inputs; both must be LOW for output drive - enables dual-control safety logic. |
| 2–9 | A1–A8 | Non-inverting data inputs - accept TTL/CMOS logic levels and tolerate 0–7 V independent of VCC. |
| 10 | GND | Ground reference - shared return path for all internal circuitry and I/Os. |
| 11–18 | Y1–Y8 | Buffered non-inverting outputs - provide symmetrical sourcing/sinking and high-Z state when enabled off. |
| 20 | VCC | Positive supply - powers internal logic and output drivers; decoupling required per high-speed CMOS practice. |
Key Features
| Feature | Design Value |
|---|---|
| Power-down protection | All inputs/outputs withstand 0–7 V regardless of VCC state - prevents damage during power sequencing or hot-swap. |
| TTL-compatible thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures interoperability with legacy 74LS/74ALS logic without level shifters. |
| Low-noise output | VOLP ≤ 0.9 V at CL = 50 pF - reduces simultaneous switching noise in dense bus architectures. |
| ESD immunity | 2 kV HBM on all pins - eliminates need for external ESD protection in most industrial control applications. |
| Pin/function compatibility | Fully compatible with 74LS541 and 74HC541 footprints and logic behavior - enables drop-in replacement. |
Applications
| Memory Address Buffering | Microcontroller Peripheral Interface |
|---|---|
Use Scenario: Isolating CPU address bus from multiple memory devices (SRAM, ROM, flash) to prevent loading and timing skew. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing controlled bus access with 4.1 ns propagation delay and ±8 mA drive. Use Value: Enables deterministic address setup/hold timing and supports up to 8 memory chips on a shared 16-bit bus. |
Use Scenario: Interfacing an 8-bit microcontroller's parallel port to external peripherals (LCD, keypad, ADC) requiring isolation and drive strength. IC Role / Device Role / Timing Role: Bidirectional bus driver with TTL-compatible inputs and low-noise outputs for clean control signaling. Use Value: Eliminates need for discrete transistors or additional logic while maintaining <10 ns timing margins at 20 MHz system clock. |
| Industrial PLC I/O Expansion | Legacy System Bus Repeater |
Use Scenario: Extending parallel I/O capacity in programmable logic controllers where long trace runs induce capacitive loading and signal degradation. IC Role / Device Role / Timing Role: High-drive buffer with 0.9 V max ground bounce, supporting 15 cm trace lengths at 10 MHz. Use Value: Reduces bit errors and improves noise margin in electrically noisy factory-floor environments. |
Use Scenario: Repeating signals between two 74-series subsystems separated by >10 cm PCB traces or backplane connectors. IC Role / Device Role / Timing Role: Low-skew repeater with matched tPLH/tPHL delays and symmetrical impedance for signal integrity preservation. Use Value: Restores signal amplitude and edge rate without introducing duty-cycle distortion or added jitter. |
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 |
|---|---|---|---|
| 74LCX541MTCX | Lower VCC range (2.0–3.6 V), higher speed (tPD = 3.5 ns typ.), but no 5V tolerance on inputs. | Suitable only for pure 3.3V systems; requires level translation when interfacing to 5V peripherals. | Select when operating exclusively at 3.3V and maximum speed is prioritized over voltage flexibility. |
| SN74HCT541PWR | Identical logic function and 5V operation, but rated for –40°C to +85°C only (vs. –55°C to +125°C for VHCT541A). | Limited suitability for extended-temperature industrial or automotive under-hood use cases. | Select for commercial-temperature cost-sensitive designs where full military-grade temp range is unnecessary. |
Compared with 74LCX541MTCX and SN74HCT541PWR, the 74VHCT541AMTR uniquely combines 5V TTL compatibility, extended temperature support (–55°C to +125°C), and 0–7 V I/O tolerance - making it optimal for ruggedized, mixed-voltage, and legacy-system upgrade applications.
Availability
74VHCT541AMTR is available at Aetrix Electronics and suitable for memory subsystem design, microcontroller peripheral interfacing, industrial PLC I/O expansion, and legacy bus repeater applications requiring stable component supply and long-term lifecycle assurance.
Supply support for 74VHCT541AMTR 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 broad analog, digital, and mixed-signal portfolios.
The 74VHCT series targets high-speed, low-power 5V logic interface applications, emphasizing robustness, TTL compatibility, and extended temperature operation for industrial and infrastructure equipment.
FAQ
Is 74VHCT541AMTR compatible with 5V TTL logic families?
Yes - it meets TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and provides ±8 mA output drive, ensuring direct interoperability with 74LS, 74ALS, and other 5V TTL families without level-shifting circuitry.
What is the maximum operating temperature range for this device?
The 74VHCT541AMTR is fully specified from –55°C to +125°C, validated across all AC/DC parameters including propagation delay, output drive, and leakage current - suitable for under-hood automotive and industrial control environments.
Can inputs be driven above VCC without damage?
Yes - all inputs tolerate 0–7 V regardless of VCC state due to integrated power-down protection diodes, enabling safe hot-plug operation and mixed-voltage domain interfacing without external clamping components.
Does this part support bidirectional data flow?
No - the 74VHCT541AMTR is a unidirectional non-inverting buffer (A→Y). For bidirectional bus transceivers, consider the 74VHCT245AMTR or similar octal transceiver variants with direction control.
74VHCT541AMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74VHCT
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74VHCT541AMTR FAQ
1.How can I place an order for 74VHCT541AMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT541AMTR 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 74VHCT541AMTR reliable?
The price and inventory of 74VHCT541AMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT541AMTR is usually 5 days.
3.What payment methods are accepted for 74VHCT541AMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT541AMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT541AMTR?
74VHCT541AMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT541AMTR 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 74VHCT541AMTR?
For technical support, including 74VHCT541AMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT541AMTR requirements.
6.How does Aetrix verify that 74VHCT541AMTR is sourced from the original manufacturer or authorized distributors?
All 74VHCT541AMTR 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 74VHCT541AMTR meets industry standards.
7.What is the process for return or replacement of 74VHCT541AMTR?
All 74VHCT541AMTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT541AMTR, 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 74VHCT541AMTR part is unused and in its original packaging.
Return procedure for 74VHCT541AMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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