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Nexperia USA Inc. 74HCT541D,652
- Part No.:
- 74HCT541D,652
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HCT541D,652.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
74HCT541D,652 from Nexperia is an octal non-inverting 3-state buffer/line driver in SO20 (SOT163-1) package, operating from 4.5 V to 5.5 V with TTL-compatible inputs and ±6 mA output drive. It features dual active-low output enables (OE1, OE2), input clamp diodes for overvoltage tolerance, and guaranteed operation from −40 °C to +125 °C. Used in bus interface, memory address latching, and data routing in industrial control backplanes.
For engineers reviewing the 74HCT541D,652 datasheet, 74HCT541D,652 pinout, 74HCT541D,652 application, or 74HCT541D,652 equivalent, key selection criteria include TTL-level input compatibility, dual independent 3-state control, propagation delay ≤28 ns at 4.5 V, high-impedance leakage <±5 μA, and SO20 thermal derating above 109 °C.
Technical Context
The device implements eight identical non-inverting buffer circuits, each with output controlled by the logical AND of OE1 and OE2 - both must be LOW for outputs to drive; either HIGH forces all Yn into high-impedance state. Input clamp diodes allow safe interfacing to signals exceeding VCC when used with current-limiting resistors.
Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure direct connection to legacy 5 V logic families, while CMOS output structure delivers rail-to-rail swing and low static current (ICC ≤ 160 μA over full temperature range).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems without level-shifting. |
| Input Logic Type | TTL-compatible - accepts 0.8 V/2.0 V thresholds, eliminating need for external translation in mixed-logic designs. |
| Output Drive | ±6.0 mA at VCC = 4.5 V - sufficient to drive 50 pF loads with <28 ns propagation delay and <18 ns disable time. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules and industrial PLC I/O stages. |
| 3-State Leakage | ±5.0 μA max at VCC = 5.5 V - minimizes bus contention current when outputs are disabled. |
| Propagation Delay | 15 ns (typ), 42 ns (max) at VCC = 4.5 V, CL = 50 pF - supports 20+ MHz bus clocking with timing margin. |
| Power Dissipation | 39 pF CPD - enables accurate dynamic power estimation (PD = CPD × VCC² × fi × N) for thermal design. |
Pinout & Package
74HCT541D,652 uses the SO20 plastic small outline package (SOT163-1), 7.5 mm body width, 20-pin gull-wing leadform, JEDEC MS-013 compliant, with 1.27 mm pitch and 109 °C thermal derating threshold.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable inputs - both must be LOW for Y0–Y7 to drive; independent control allows partial bus gating. |
| 2–9 | A0–A7 | Data inputs - TTL-compatible, with clamp diodes enabling safe overvoltage (up to VCC + 0.5 V) with series resistors. |
| 10 | GND | Ground reference - decoupling capacitor placement near this pin critical for noise immunity and switching stability. |
| 11–18 | Y0–Y7 | Non-inverting 3-state outputs - high-impedance OFF-state leakage ≤±5 μA ensures minimal bus loading during disable. |
| 20 | VCC | Positive supply - requires local 100 nF ceramic decoupling; total power dissipation derates linearly above 109 °C. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | OE1 and OE2 act as ANDed enable - supports hierarchical bus arbitration and segmented data path isolation. |
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5 V - eliminates level shifters when interfacing with legacy 74LS/74ALS devices. |
| Input clamp diodes | Enable safe interface to signals up to VCC + 0.5 V using external current-limiting resistors - reduces need for external protection. |
| High noise immunity | Typical 40 % VCC noise margin at VCC = 5 V - maintains reliable operation in electrically noisy industrial environments. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events. |
Applications
| Industrial Backplane Bus Interface | Microcontroller GPIO Expansion |
|---|---|
Use Scenario: Isolating and driving parallel address/data buses between CPU and peripheral cards in modular PLC racks. IC Role / Device Role / Timing Role: Non-inverting buffer with dual 3-state control acts as bi-directional bus transceiver enabler, synchronizing with RD/WR strobes. Use Value: ±6 mA drive and <28 ns tpd ensure clean signal integrity across 15 cm PCB traces loaded with 50 pF per slot. | Use Scenario: Extending limited MCU GPIO count to drive LED arrays, relays, and sensors in smart building controllers. IC Role / Device Role / Timing Role: Output expander buffering MCU pins, with OE1/OE2 allowing software-controlled bank enable/disable for power sequencing. Use Value: TTL-compatible inputs eliminate external translators; 125 °C rating supports operation inside sealed enclosures with passive cooling. |
| Legacy System Memory Address Latching | Test Equipment Signal Routing |
Use Scenario: Latching 8-bit address segments from Z80 or 8085 CPUs to static RAM or EPROM chips in retro-computing hardware. IC Role / Device Role / Timing Role: Address buffer isolating CPU address bus from memory load, enabled only during valid address cycles via MREQ or RD. Use Value: Low 0.26 V VOL at 6 mA ensures robust LOW-level recognition by memory chips even with trace resistance. | Use Scenario: Multiplexing stimulus signals from ATE sources to DUT pins in automated test fixtures with shared cabling. IC Role / Device Role / Timing Role: Signal router enabling one instrument channel to drive multiple DUT inputs sequentially via OE control. Use Value: <±5 μA 3-state leakage prevents crosstalk between channels; SO20 footprint simplifies fixture layout and rework. |
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 |
|---|---|---|---|
| SN74HCT541PWRE4 | TSSOP20 package (SOT360-1), 4.4 mm width, 100 °C derating threshold vs. SO20's 109 °C. | Better board density but lower thermal margin; requires tighter layout for same power handling. | Select for space-constrained designs where thermal load is low and reflow profile accommodates fine-pitch leads. |
| 74ACT541SCX | Higher speed (tpd = 9 ns typ), 5 V only, ±24 mA drive, no input clamps, higher ICC (40 μA typ). | Supports faster buses but lacks overvoltage tolerance and consumes more quiescent power. | Select when timing budget is tight and system voltage is strictly regulated 5 V with no risk of input overshoot. |
Compared with SN74HCT541PWRE4 and 74ACT541SCX, the 74HCT541D,652 offers superior thermal robustness in SO20, built-in input protection, and lowest standby current - making it optimal for thermally demanding, mixed-signal industrial interfaces.
Availability
74HCT541D,652 is available at Aetrix Electronics and suitable for industrial backplane bus interface, microcontroller GPIO expansion, and legacy system memory address latching requiring stable component supply across extended temperature ranges.
Supply support for 74HCT541D,652 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
Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The 74HCT series targets industrial and consumer systems needing TTL-compatible logic with CMOS power efficiency and robust ESD/latch-up performance.
FAQ
What is the maximum allowable input voltage relative to VCC?
The absolute maximum input voltage is VCC + 0.5 V, enabled by integrated input clamp diodes. Exceeding this requires external current-limiting resistors to keep IIK within ±20 mA, as specified in Table 4. This feature allows safe interfacing with hot-pluggable or mismatched voltage domains without added protection circuitry.
Can OE1 and OE2 be used independently to control different output groups?
No - OE1 and OE2 are logically ANDed internally; both must be LOW for any output to drive. They cannot independently gate subsets of Y0–Y7. To achieve per-group control, separate 74HCT541D,652 devices or quad buffers like 74HCT125 must be used, as confirmed by the functional table and logic diagram in Figures 3 and 4.
Is the 74HCT541D,652 qualified for automotive applications?
No - this part is not AEC-Q100 qualified and carries no automotive grade designation in its ordering information or datasheet. While rated for −40 °C to +125 °C, it lacks automotive-specific stress testing, failure rate reporting, and PPAP documentation required for under-hood or safety-critical use.
How does the SO20 package affect thermal performance compared to TSSOP20?
The SO20 (SOT163-1) package has a higher thermal derating threshold (109 °C vs. 100 °C for TSSOP20) and dissipates 500 mW before derating begins. Its larger copper area and leadframe provide better heat spreading, making it preferable in high-ambient or high-duty-cycle applications where sustained power dissipation exceeds 300 mW.
74HCT541D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HCT541D,652 FAQ
1.How can I place an order for 74HCT541D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT541D,652 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 74HCT541D,652 reliable?
The price and inventory of 74HCT541D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT541D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT541D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT541D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT541D,652?
74HCT541D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT541D,652 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 74HCT541D,652?
For technical support, including 74HCT541D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT541D,652 requirements.
6.How does Aetrix verify that 74HCT541D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT541D,652 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 74HCT541D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT541D,652?
All 74HCT541D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT541D,652, 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 74HCT541D,652 part is unused and in its original packaging.
Return procedure for 74HCT541D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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