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Nexperia USA Inc. 74AHCT240PW,118
- Part No.:
- 74AHCT240PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT240PW,118.pdf
- Description:
- IC BUFFER INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
74AHCT240PW,118 from Nexperia is an octal inverting 3-state buffer/line driver with dual independent output enables (1OE, 2OE), operating at 4.5–5.5 V supply, supporting mixed-voltage translation via overvoltage-tolerant inputs, and rated for -40 °C to +125 °C industrial temperature range. It functions as two 4-bit or one 8-bit buffer in bus interface, address/data line driving, and level-shifting applications.
For engineers reviewing the 74AHCT240PW,118 datasheet, 74AHCT240PW,118 pinout, 74AHCT240PW,118 application, or 74AHCT240PW,118 equivalent, key selection criteria include propagation delay (≤8.5 ns @ CL=15 pF), 3-state enable timing (ten ≤14.4 ns), input overvoltage tolerance up to 7.0 V, Schmitt-trigger inputs for noise immunity, and TSSOP20 package thermal performance.
Technical Context
The 74AHCT240PW,118 implements TTL-compatible input thresholds with Schmitt-trigger hysteresis on all eight inputs, enabling robust signal conditioning in noisy digital environments. Its dual active-low output enables (1OE, 2OE) independently control two groups of four 3-state outputs, allowing flexible bus partitioning without external logic.
Input voltage tolerance extends to 7.0 V regardless of VCC, permitting direct interfacing between 3.3 V and 5 V domains without external level shifters. The device complies with IEC 60134 absolute maximum ratings and delivers guaranteed VOH ≥3.70 V and VOL ≤0.55 V under full industrial temperature and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5–5.5 V - Ensures compatibility with standard 5 V TTL and mixed 3.3/5 V systems. |
| Propagation Delay (tpd) | ≤8.5 ns @ CL=15 pF - Enables reliable operation in high-speed bus timing budgets up to ~100 MHz. |
| Enable Time (ten) | ≤14.4 ns @ CL=50 pF - Supports fast bus arbitration and dynamic output gating in multiplexed architectures. |
| Input Overvoltage Tolerance | Up to 7.0 V - Allows direct connection to higher-voltage logic without clamping diodes or resistors. |
| Output Drive Strength | ±8.0 mA - Sustains clean signal integrity across typical PCB trace loads and fan-out of 10+ TTL inputs. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood, industrial control, and extended-temperature embedded systems. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Reduces susceptibility to handling damage during assembly and field operation. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, 0.85 mm max height - optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - each controls four 3-state outputs; tied LOW enables group, HIGH disables to high-Z. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 data inputs - inverted and driven to corresponding 1Yn outputs when 1OE = LOW. |
| 11, 13, 15, 17 | 2A0–2A3 | Group 2 data inputs - inverted and driven to corresponding 2Yn outputs when 2OE = LOW. |
| 12, 14, 16, 18 | 1Y0–1Y3 | Group 1 inverted 3-state outputs - high-Z when 1OE = HIGH; logic HIGH/LOW otherwise. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 inverted 3-state outputs - high-Z when 2OE = HIGH; logic HIGH/LOW otherwise. |
| 10 | GND | Ground reference - must be connected to system 0 V plane for stable noise margin and ESD path. |
| 20 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm for transient current stability. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Provides >0.4 V hysteresis per input - rejects sub-10 ns noise spikes and stabilizes marginal signal edges. |
| Overvoltage-tolerant inputs | Accepts VI up to 7.0 V independent of VCC - eliminates need for external level translators in 3.3 V ↔ 5 V interfaces. |
| Dual independent 3-state control | 1OE and 2OE allow concurrent or staggered bus release - prevents contention during multi-master arbitration. |
| Balanced propagation delays | tpd variation ≤1.5 ns across all channels - ensures deterministic skew in parallel data paths. |
| Industrial temperature grade | Specified from -40 °C to +125 °C - supports deployment in motor drives, power supplies, and factory automation. |
Applications
| Industrial Bus Interface | Memory Address Buffering |
|---|---|
|
Use Scenario: Isolating microcontroller address/data buses from multiple peripheral ICs sharing a common bus segment. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing bidirectional isolation and controlled bus release timing. Use Value: Prevents bus contention during peripheral switching; enables clean address latching with <8.5 ns propagation delay. |
Use Scenario: Driving 8-bit address lines from an FPGA to multiple SRAM chips in a memory expansion subsystem. IC Role / Device Role / Timing Role: Level-translating buffer translating 3.3 V FPGA outputs to 5 V SRAM address inputs while maintaining timing integrity. Use Value: Eliminates external level shifters using native 7.0 V input tolerance; meets SRAM setup/hold margins with ≤14.4 ns enable time. |
| Motor Control Signal Conditioning | Legacy System Interfacing |
|
Use Scenario: Conditioning PWM and direction signals from a 3.3 V MCU to gate drivers in an industrial motor drive board. IC Role / Device Role / Timing Role: Noise-immune inverting buffer with Schmitt-trigger inputs rejecting EMI-coupled transients on long traces. Use Value: Maintains signal fidelity in electrically noisy environments; guarantees clean edge transitions despite >100 mV of coupled noise. |
Use Scenario: Interfacing modern low-voltage controllers to legacy 5 V TTL peripherals in test equipment or instrumentation racks. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator enabling backward compatibility without redesign. Use Value: Supports plug-and-play integration with existing 5 V backplanes; avoids custom PCB revisions or discrete resistor networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT240PWR | TI part in TSSOP20; identical VCC, propagation delay, and pinout; slightly lower IOZ (±0.1 μA vs ±0.25 μA @ 25 °C). | Same functional role but tighter static current specs; validated for TI-based reference designs. | Select if sourcing from TI-authorized channels or aligning with TI ecosystem toolchains. |
| 74LVC240APW,118 | Nexperia LVC variant: 1.65–3.6 V operation, lower drive (±24 mA), no overvoltage tolerance; same TSSOP20 footprint. | Not suitable for 5 V systems or mixed-voltage translation; limited to 3.3 V-only domains. | Choose only for pure 3.3 V applications requiring lower power and smaller voltage swing. |
Compared with SN74AHCT240PWR, the 74AHCT240PW,118 offers broader overvoltage tolerance and higher output drive; versus 74LVC240APW,118, it supports 5 V operation and voltage translation but consumes more quiescent current.
Availability
74AHCT240PW,118 is available at Aetrix Electronics and suitable for industrial bus interface, memory address buffering, and motor control signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for 74AHCT240PW,118 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74AHCT series targets robust, pin-compatible replacements for legacy 74-series logic in industrial and infrastructure applications, emphasizing wide temperature operation and noise immunity.
FAQ
Can 74AHCT240PW,118 operate with a 3.3 V supply?
No. The 74AHCT240PW,118 requires a minimum VCC of 4.5 V and is specified only from 4.5 V to 5.5 V. Its TTL-compatible inputs and output drive characteristics are optimized for 5 V operation; using 3.3 V violates recommended operating conditions and results in undefined logic levels and degraded timing.
What is the maximum capacitive load this device can drive reliably?
The 74AHCT240PW,118 is characterized up to 50 pF load capacitance, with propagation delay increasing from 5.8 ns (CL=15 pF) to 8.4 ns (CL=50 pF). For loads exceeding 50 pF, rise/fall times degrade and may violate setup/hold timing in synchronous systems; external series termination or buffer staging is recommended.
How does the Schmitt-trigger input improve noise immunity?
Each input features ≥0.4 V hysteresis, meaning the threshold for rising-edge detection (~1.7 V) differs from falling-edge detection (~1.3 V). This prevents multiple toggles from slow-rising or noisy signals, ensuring single, clean transitions even with >100 mV of superimposed noise on the input waveform.
Is the thermal pad on the TSSOP20 package electrically connected?
No. The exposed thermal pad on the SOT360-1 (TSSOP20) package is not internally connected to any die node. Per Nexperia's datasheet, it may remain floating or be soldered to GND for thermal improvement, but no electrical function is assigned to it.
74AHCT240PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHCT240PW,118 FAQ
1.How can I place an order for 74AHCT240PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT240PW,118 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 74AHCT240PW,118 reliable?
The price and inventory of 74AHCT240PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT240PW,118 is usually 5 days.
3.What payment methods are accepted for 74AHCT240PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT240PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT240PW,118?
74AHCT240PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT240PW,118 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 74AHCT240PW,118?
For technical support, including 74AHCT240PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT240PW,118 requirements.
6.How does Aetrix verify that 74AHCT240PW,118 is sourced from the original manufacturer or authorized distributors?
All 74AHCT240PW,118 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 74AHCT240PW,118 meets industry standards.
7.What is the process for return or replacement of 74AHCT240PW,118?
All 74AHCT240PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT240PW,118, 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 74AHCT240PW,118 part is unused and in its original packaging.
Return procedure for 74AHCT240PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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