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NXP Semiconductors 74HCT9115N,112
- Part No.:
- 74HCT9115N,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HCT9115N,112.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
74HCT9115N,112 from Nexperia is a 9-bit Schmitt trigger buffer IC with open-drain outputs and clamp diodes on all inputs, operating from 4.5 V to 5.5 V. It provides noise-immune signal conditioning for slow-rising or noisy digital lines in industrial control and sensor interface circuits, with propagation delay as low as 13 ns at 4.5 V and hysteresis of 0.68 V typical.
For engineers reviewing the 74HCT9115N,112 datasheet, 74HCT9115N,112 pinout, 74HCT9115N,112 application, or 74HCT9115N,112 equivalent, key selection considerations include its TTL-compatible input thresholds (VT+ = 2.37 V, VT− = 1.80 V at VCC = 4.5 V), open-drain output drive capability (IO = ±25 mA), −40 °C to +125 °C temperature range, and SO20 (SOT163-1) package compatibility.
Technical Context
The 74HCT9115N,112 implements nine independent Schmitt-trigger input buffers feeding open-drain NMOS outputs, enabling wired-AND logic and level translation. Its input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Each channel operates with hysteresis (VH = 0.68 V typ. at 4.5 V), ensuring clean edge generation from slow or noisy signals. The device complies with JEDEC JESD7A (2.0 V–6.0 V) and JESD8C (2.7 V–3.6 V), and supports static operation across −40 °C to +125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - TTL-compatible VCC range ensures direct integration into 5 V logic systems without level shifters. |
| Propagation Delay | 13 ns typ. at VCC = 4.5 V - enables reliable timing in high-speed bus conditioning and sensor signal cleanup up to ~30 MHz. |
| Input Hysteresis | 0.68 V typ. at VCC = 4.5 V - rejects noise up to ±340 mV on input signals, critical for industrial analog-to-digital front-ends. |
| Output Drive | ±25 mA max. clamping current - supports robust pull-down into loads such as LEDs, relays, or I²C buses with external pull-ups. |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood automotive modules, motor drives, and industrial PLC I/O stages. |
| ESD Rating | HBM > 2000 V - withstands handling and board-level transients without protection circuitry overhead. |
| Input Thresholds | VT+ = 2.37 V, VT− = 1.80 V at VCC = 4.5 V - guarantees TTL-level recognition and eliminates metastability in mixed-voltage interfaces. |
Pinout & Package
74HCT9115N,112 is housed in a plastic small outline package (SO20) with 20 leads and 7.5 mm body width (SOT163-1). Pin 1 is index-marked; pins are arranged in dual rows with GND at pin 10 and VCC at pin 20.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A8 | Data inputs (pins 1–9) | Schmitt-triggered inputs with clamp diodes - accept slow or overvoltage signals up to VCC + 0.5 V with series resistor. |
| GND | Ground reference (pin 10) | Common return path for all internal logic and output sinks - must be low-impedance for noise immunity. |
| Y0–Y8 | Open-drain outputs (pins 11–19) | Active-low outputs requiring external pull-up - enable wired-AND, I²C-style bus sharing, and voltage-level translation. |
| VCC | Supply voltage (pin 20) | Primary power rail - decoupling capacitor (100 nF) required within 10 mm for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VT+ = 2.37 V and VT− = 1.80 V at 4.5 V - ensures reliable recognition of standard 5 V TTL logic levels without ambiguity. |
| Open-drain output architecture | Supports multi-drop bus configurations and level translation - allows Yn outputs to interface with 3.3 V, 5 V, or 12 V pull-up domains. |
| Unlimited input rise/fall times | Eliminates need for external RC filtering - accepts arbitrarily slow edges (e.g., thermistor or potentiometer wiper signals) without glitches. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events in harsh environments. |
| Wide temperature qualification | Specified from −40 °C to +125 °C - validated for use in engine control units, solar inverters, and factory automation hardware. |
Applications
| Industrial Sensor Interface | Legacy Bus Signal Conditioning |
|---|---|
Use Scenario: Converting slow-moving analog sensor outputs (e.g., RTD bridges or potentiometers) into clean digital logic levels for microcontroller ADC trigger inputs. IC Role / Device Role / Timing Role: Schmitt-trigger buffer that cleans up noisy or slew-limited analog-derived signals before digitization. Use Value: Eliminates false triggering caused by EMI or thermal drift, improving measurement repeatability in PLC analog input modules. | Use Scenario: Interfacing legacy 5 V TTL encoder signals to modern 3.3 V FPGA I/O banks via shared open-drain bus. IC Role / Device Role / Timing Role: Level-translating buffer with hysteresis, enabling robust signal integrity across voltage domains. Use Value: Prevents metastability and reduces external component count by replacing discrete resistor-divider + Schmitt circuits. |
| Motor Control Feedback | Wired-AND Safety Logic |
Use Scenario: Conditioning hall-effect sensor outputs in BLDC motor controllers where supply ripple and EMI degrade edge fidelity. IC Role / Device Role / Timing Role: Noise-immune signal conditioner converting analog hall waveforms into jitter-free square waves for commutation timing. Use Value: Reduces torque ripple and improves efficiency by delivering precise zero-crossing detection despite 100 mV pk-pk noise. | Use Scenario: Implementing hardware safety interlocks where multiple fault conditions (e.g., overtemp, overcurrent, door open) must AND together to disable power stage. IC Role / Device Role / Timing Role: Wired-AND gate using open-drain outputs tied to common pull-up - any active-low fault pulls bus low. Use Value: Provides fail-safe, cycle-accurate shutdown response without software dependency or single-point failure risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schmitt-trigger buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT14D,653 | 6-channel inverter vs. 9-channel non-inverting buffer; same SO14 package and 4.5–5.5 V range. | Requires inversion logic rework; lacks open-drain outputs and input clamp diodes. | Select only if inverting function and lower channel count suffice, and external pull-ups are acceptable for output drive. |
| SN74LVTH162244DGGR | 16-bit non-inverting buffer with TTL inputs but push-pull (not open-drain) outputs; operates down to 2.7 V. | Cannot perform wired-AND or level translation; requires separate bus arbitration design. | Choose when higher channel density and lower VCC are needed, but open-drain functionality is not required. |
Compared with 74HCT9115N,112, the 74HCT14D offers fewer channels and no open-drain flexibility, while SN74LVTH162244DGGR provides more bits but sacrifices bus-sharing capability - making 74HCT9115N,112 uniquely suited for noise-prone, multi-signal wired-AND applications in 5 V industrial systems.
Availability
74HCT9115N,112 is available at Aetrix Electronics and suitable for industrial sensor interface, motor control feedback, wired-AND safety logic, and legacy bus signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for 74HCT9115N,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 specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.
The 74HCT9115N,112 belongs to Nexperia's 74HCT logic family, engineered for TTL-compatible operation in noise-sensitive, high-reliability applications demanding robust signal integrity and wide temperature resilience.
FAQ
What is the maximum supply voltage rating for the 74HCT9115N,112?
The absolute maximum supply voltage for the 74HCT9115N,112 is +7.0 V, though recommended operation is limited to 4.5 V to 5.5 V. Exceeding 5.5 V risks violating TTL input compatibility and may reduce long-term reliability, even if within absolute limits. Always refer to the 74HCT9115N,112 datasheet Section 7 (Limiting Values) for derating guidance above 109 °C.
Does the 74HCT9115N,112 support wired-AND bus configurations?
Yes, the 74HCT9115N,112 supports wired-AND configurations via its nine open-drain outputs (Y0–Y8), each requiring an external pull-up resistor. When multiple 74HCT9115N,112 outputs share a common bus line, the line remains HIGH only if all drivers are inactive (high-impedance); any active LOW output pulls the entire bus LOW - a fundamental requirement for I²C-style arbitration and hardware safety interlocks.
Can the 74HCT9115N,112 interface directly with 3.3 V logic inputs?
No, the 74HCT9115N,112 does not directly drive 3.3 V logic inputs because its open-drain outputs require an external pull-up to a compatible voltage rail. To interface with 3.3 V systems, connect the pull-up resistor to 3.3 V - the 74HCT9115N,112 output will then swing between 0 V and 3.3 V, satisfying VIH and VIL thresholds of 3.3 V CMOS devices. Ensure the 74HCT9115N,112's VCC remains at 4.5–5.5 V for proper input recognition.
What is the typical hysteresis voltage of the 74HCT9115N,112 at 5 V supply?
The typical hysteresis voltage (VH) of the 74HCT9115N,112 is 0.68 V at VCC = 4.5 V and 0.68 V at VCC = 5.0 V (interpolated from datasheet Table 10). This value represents the difference between positive-going (VT+) and negative-going (VT−) input thresholds, providing noise margin against signal bounce or EMI-induced false transitions in industrial environments.
Is the 74HCT9115N,112 qualified for automotive applications?
No, the 74HCT9115N,112 is not automotive-qualified. While it operates from −40 °C to +125 °C, Nexperia explicitly states in Section 15 of the datasheet that non-automotive qualified products like the 74HCT9115N,112 are neither tested nor warranted for automotive use. For AEC-Q100 compliance, select Nexperia's automotive-grade equivalents such as the 74HCT9115PWJ, which undergoes additional stress testing and screening.
74HCT9115N,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:
- 9
- Number of Bits per Element:
- 1
- Input Type:
- Schmitt Trigger
- Output Type:
- Open Drain
- Current - Output High, Low:
- -, 4mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HCT9115N,112 FAQ
1.How can I place an order for 74HCT9115N,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT9115N,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 74HCT9115N,112 reliable?
The price and inventory of 74HCT9115N,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT9115N,112 is usually 5 days.
3.What payment methods are accepted for 74HCT9115N,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT9115N,112 transactions.
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4.How is shipping managed for 74HCT9115N,112?
74HCT9115N,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT9115N,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 74HCT9115N,112?
For technical support, including 74HCT9115N,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT9115N,112 requirements.
6.How does Aetrix verify that 74HCT9115N,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT9115N,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 74HCT9115N,112 meets industry standards.
7.What is the process for return or replacement of 74HCT9115N,112?
All 74HCT9115N,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT9115N,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 74HCT9115N,112 part is unused and in its original packaging.
Return procedure for 74HCT9115N,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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