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NXP Semiconductors 74HCT7541N,112
- Part No.:
- 74HCT7541N,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HCT7541N,112.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,131
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Product details
Overview
74HCT7541N,112 from Nexperia is an octal Schmitt-trigger buffer/line driver with 3-state outputs, TTL-compatible inputs, and dual output enables (OE1, OE2). It operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at VCC = 4.5 V, and features 0.23 V hysteresis for noise-immune signal conditioning in industrial bus interfaces.
For engineers reviewing the 74HCT7541N,112 datasheet, 74HCT7541N,112 pinout, 74HCT7541N,112 application, or 74HCT7541N,112 equivalent, this device serves as a robust level-shifting and waveform-shaping buffer for legacy TTL-driven control buses, microcontroller I/O expansion, and noisy sensor interface subsystems where input signal integrity is critical.
Technical Context
The 74HCT7541N,112 implements eight independent non-inverting Schmitt-trigger input buffers feeding 3-state CMOS outputs, each controlled by two active-low output enable inputs (OE1 and OE2). Its TTL-level input thresholds (VT+ = 2.0 V, VT− = 0.64 V at VCC = 4.5 V) ensure compatibility with standard 5 V TTL logic families while maintaining CMOS power efficiency.
Propagation delay is 19 ns typical (max 48 ns) from input to output at VCC = 4.5 V and CL = 50 pF, with enable/disable times of 18 ns/20 ns respectively. Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports direct interface with 5 V TTL and mixed-voltage systems without level shifters |
| Input Thresholds | VT+ = 2.0 V, VT− = 0.64 V at VCC = 4.5 V - provides 1.36 V hysteresis for reliable noise rejection on slow-rising signals |
| Output Drive | ±6.0 mA at VCC = 4.5 V - sufficient to drive 50 pF loads and standard TTL fan-out (10) with margin |
| Propagation Delay | 19 ns typical (48 ns max) - enables use in 10–20 MHz digital control paths with deterministic timing |
| Operating Temperature | −40 °C to +125 °C - qualified for extended industrial and under-hood embedded applications |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets JEDEC JS-001/JS-002 for robust handling in automated assembly |
| Power Dissipation | ICC ≤ 160 μA at VCC = 5.5 V - ultra-low static current enables battery-backed or always-on monitoring circuits |
Pinout & Package
74HCT7541N,112 is supplied in a plastic DIP-20 package (SOT146-1), 24.2 mm × 6.35 mm body, 2.54 mm lead pitch. Pin 1 is index-marked; leads are through-hole compatible with standard 0.6 mm PCB holes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low dual output enables - both must be LOW for output drivers to activate; HIGH places all Yn in high-impedance state |
| 2–9 | A0–A7 | Schmitt-trigger input pins - accept slow or noisy TTL-level signals and produce clean, jitter-free CMOS outputs |
| 10 | GND | Ground reference - decoupling capacitor (100 nF) required within 10 mm of pin for stable operation |
| 11–18 | Y0–Y7 | Non-inverting 3-state outputs - sink/source up to ±6 mA; high-Z state isolates downstream loads during bus arbitration |
| 20 | VCC | Positive supply - must be bypassed locally; voltage tolerance excludes transient overshoot beyond 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts standard 5 V TTL logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while operating on CMOS supply rails |
| Dual 3-state enables | Independent OE1/OE2 control allows flexible bus partitioning or cascaded enable sequencing in multi-driver systems |
| Schmitt-trigger hysteresis | 0.23 V minimum hysteresis at VCC = 4.5 V ensures immunity to <100 mV of input noise on slow edges |
| Clamp diode protection | Integrated input diodes permit safe connection to signals up to VCC + 0.5 V using external series resistors |
| Wide temperature range | Specified from −40 °C to +125 °C - validated for use in motor control, power supply monitoring, and factory automation |
Applications
| Industrial Bus Interface | Microcontroller I/O Expansion |
|---|---|
Use Scenario: Isolating and conditioning signals between a PLC main controller and noisy fieldbus transceivers operating in electrically harsh environments. IC Role / Device Role / Timing Role: 74HCT7541N,112 acts as a noise-filtering buffer stage, converting marginal TTL-level bus signals into clean, rail-to-rail CMOS outputs for FPGA or MCU sampling. Use Value: Eliminates false triggering caused by EMI-induced input glitches, reducing communication errors by >95% in 4–20 mA loop-coupled systems. |
Use Scenario: Extending GPIO count on an ARM Cortex-M4 MCU to drive eight discrete LED indicators and status relays in a programmable logic controller. IC Role / Device Role / Timing Role: 74HCT7541N,112 functions as a parallel output expander with 3-state capability, enabling dynamic reconfiguration of shared control lines. Use Value: Allows time-multiplexed control of eight outputs using only two enable lines, cutting PCB routing complexity and eliminating need for additional address decoding logic. |
| Sensor Signal Conditioning | Legacy System Interfacing |
Use Scenario: Converting slow-rising analog comparator outputs (e.g., from thermistor-based overtemperature detection) into sharp digital transitions for interrupt-driven MCU response. IC Role / Device Role / Timing Role: 74HCT7541N,112 serves as a Schmitt-trigger front-end, transforming millisecond-scale input ramps into sub-20 ns output edges. Use Value: Reduces interrupt latency uncertainty from ±5 ms to ±25 ns, enabling precise thermal event timestamping in safety-critical shutdown sequences. |
Use Scenario: Bridging a modern 3.3 V microcontroller to legacy 5 V TTL peripherals such as EPROM programmers, vintage display controllers, or test equipment interfaces. IC Role / Device Role / Timing Role: 74HCT7541N,112 performs bidirectional level translation and signal sharpening, accepting 3.3 V logic highs while driving full 5 V TTL-compliant outputs. Use Value: Enables drop-in replacement of obsolete 74LS244 without redesigning power domains or adding discrete level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal Schmitt-trigger buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT244PW,118 | No Schmitt-trigger inputs; standard TTL-compatible inputs only; TSSOP20 package | Lacks hysteresis - unsuitable for noisy or slow-rising signals; better for clean, fast digital buses | Select when signal integrity is guaranteed and cost-per-pin is prioritized over noise immunity |
| SN74LVTH244APW | Lower VCC range (2.7–3.6 V); LVCMOS input thresholds; higher drive (±24 mA) | Not 5 V tolerant; requires level shifting for 5 V systems; optimized for low-voltage portable designs | Choose only for 3.3 V-only systems requiring higher drive strength and lower propagation delay (3.5 ns typical) |
Compared with 74HCT7541N,112, the 74HCT244PW,118 offers lower cost but no noise immunity, while the SN74LVTH244APW delivers faster switching and stronger drive yet cannot operate directly from 5 V supplies - making 74HCT7541N,112 the sole choice for robust 5 V industrial signal conditioning with Schmitt-trigger functionality.
Availability
74HCT7541N,112 is available at Aetrix Electronics and suitable for industrial bus interface, microcontroller I/O expansion, sensor signal conditioning, and legacy system interfacing requiring stable component supply across extended temperature ranges.
Supply support for 74HCT7541N,112 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 logic, discrete, and MOSFET solutions with focus on efficiency, miniaturization, and automotive-grade reliability.
The 74HCT7541N,112 belongs to Nexperia's 74HCT logic family, engineered for seamless interoperability with legacy TTL systems while delivering CMOS power efficiency and industrial temperature resilience.
FAQ
What is the maximum supply voltage rating for the 74HCT7541N,112?
The absolute maximum supply voltage for the 74HCT7541N,112 is +7.0 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operation above 5.5 V violates JEDEC JESD7A compliance and risks accelerated parametric drift or latch-up under transient conditions. The 74HCT7541N,112 must be powered within its specified 4.5–5.5 V window for guaranteed timing, drive strength, and logic threshold behavior.
Does the 74HCT7541N,112 support true 5 V TTL input compatibility?
Yes - the 74HCT7541N,112 features TTL-compatible input thresholds: VIH(min) = 2.0 V and VIL(max) = 0.8 V at VCC = 4.5 V, fully satisfying standard 5 V TTL logic levels. Unlike generic CMOS inputs, these thresholds ensure reliable recognition of TTL outputs without external biasing, and the integrated Schmitt-trigger action adds noise margin beyond basic TTL specs.
Can both OE1 and OE2 be used independently on the 74HCT7541N,112?
No - the 74HCT7541N,112 requires both OE1 and OE2 to be LOW simultaneously to enable outputs; if either is HIGH, all eight outputs enter high-impedance state. This dual-enable architecture prevents partial bus activation and ensures atomic control of the entire octal buffer group, which is essential for glitch-free bus arbitration in industrial backplanes.
What is the typical propagation delay of the 74HCT7541N,112 at 5 V supply?
The typical propagation delay (tpd) of the 74HCT7541N,112 is 19 ns from input (An) to output (Yn) at VCC = 4.5 V, CL = 50 pF, and Tamb = 25 °C. At nominal 5.0 V and CL = 15 pF, delay drops to 16 ns. These values are measured under defined test conditions per Figure 3 and Table 7, and remain within 48 ns maximum across −40 °C to +125 °C.
Is the 74HCT7541N,112 pin-compatible with the 74HC7541N,112?
Yes - the 74HCT7541N,112 and 74HC7541N,112 share identical DIP-20 (SOT146-1) pinout, package dimensions, and functional pin assignments. The only difference is input threshold specification: 74HC7541N,112 uses CMOS-level inputs (VIH ≈ 0.7×VCC), while 74HCT7541N,112 uses fixed TTL thresholds. Electrical substitution is possible only if the driving source meets the respective input voltage requirements.
74HCT7541N,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- Schmitt Trigger
- 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:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HCT7541N,112 FAQ
1.How can I place an order for 74HCT7541N,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT7541N,112 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 74HCT7541N,112 reliable?
The price and inventory of 74HCT7541N,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT7541N,112 is usually 5 days.
3.What payment methods are accepted for 74HCT7541N,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT7541N,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT7541N,112?
74HCT7541N,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT7541N,112 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 74HCT7541N,112?
For technical support, including 74HCT7541N,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT7541N,112 requirements.
6.How does Aetrix verify that 74HCT7541N,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT7541N,112 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 74HCT7541N,112 meets industry standards.
7.What is the process for return or replacement of 74HCT7541N,112?
All 74HCT7541N,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT7541N,112, 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 74HCT7541N,112 part is unused and in its original packaging.
Return procedure for 74HCT7541N,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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