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Nexperia USA Inc. 74HC240PW,118
- Part No.:
- 74HC240PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC240PW,118.pdf
- Description:
- IC BUFFER INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,845
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Product details
Overview
74HC240PW,118 from Nexperia is an octal inverting 3-state buffer/line driver in TSSOP20 package, operating from 2.0 V to 6.0 V supply, delivering 7.8 mA output drive at 4.5 V, with propagation delay as low as 9 ns (VCC = 5.0 V, CL = 15 pF), used for bidirectional bus isolation and address/data line buffering in industrial control logic systems.
For engineers reviewing the 74HC240PW,118 datasheet, 74HC240PW,118 pinout, 74HC240PW,118 application, or 74HC240PW,118 equivalent, this page provides verified functional identity, validated TSSOP20 pin mapping, confirmed -40 °C to +125 °C temperature rating, real-world timing parameters under load, and direct substitution guidance against industry-standard alternatives.
Technical Context
The device implements two independent 4-bit inverting buffer sections, each controlled by a dedicated active-low output enable (1OE, 2OE), enabling selective bus driving without contention. Each section drives four high-impedance outputs that invert input signals when enabled.
Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Static characteristics include VIH = 3.15 V (min, VCC = 4.5 V) and VOL = 0.26 V (max, IO = 6.0 mA), ensuring robust TTL-compatible switching margins for 74HCT240 variants and CMOS-level compatibility for 74HC240.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal inverting 3-state buffer with dual OE control (1OE/2OE) |
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation |
| Output Drive | ±7.8 mA (VCC = 4.5 V) - sufficient to drive 50-pF loads with <30 ns propagation delay |
| Propagation Delay | 9 ns typ. (VCC = 5.0 V, CL = 15 pF) - enables reliable operation in 33 MHz bus systems |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial and under-hood applications |
| Input Clamp Diodes | Integrated - permits safe overvoltage input handling up to VCC + 0.5 V with external resistor |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets JEDEC JS-001/JS-002 Class 2/C3 for board-level robustness |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable inputs - independently disable Group 1 (pins 12–18) or Group 2 (pins 3–9) outputs |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 data inputs - inverted and driven to 1Y0–1Y3 when 1OE = LOW |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 outputs - inverted mirror of 2A0–2A3 when 2OE = LOW |
| 10 | GND | Ground reference - all voltage levels and current paths referenced to this node |
| 11, 13, 15, 17 | 2A0–2A3 | Group 2 data inputs - inverted and driven to 2Y0–2Y3 when 2OE = LOW |
| 12, 14, 16, 18 | 1Y0–1Y3 | Group 1 outputs - inverted mirror of 1A0–1A3 when 1OE = LOW |
| 20 | VCC | Positive supply - powers internal logic and output stages; decoupling required within 10 mm |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2.0 V to 6.0 V operation - eliminates level-shifter need in multi-rail 3.3 V/5 V systems |
| Independent group control | Dual OE pins (1OE/2OE) - enables time-multiplexed bus sharing between two peripheral subsystems |
| Overvoltage-tolerant inputs | Clamp diodes on all inputs - allows safe connection to 12 V control signals using 10 kΩ series resistors |
| High noise immunity | Typical VIH/VIL margin >1.3 V at VCC = 4.5 V - rejects >400 mV of coupled digital noise on PCB traces |
| Thermal reliability | Ptot = 500 mW with 10.0 mW/K derating above 100 °C - supports sustained operation in enclosed enclosures |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
Use Scenario: Isolating microcontroller GPIO banks from noisy 24 V field I/O modules in programmable logic controllers. IC Role / Device Role: Inverting 3-state buffer providing direction-controlled signal translation between 3.3 V MCU and 5 V backplane. Use Value: Dual OE control allows dynamic bus arbitration during hot-swap module insertion without signal contention. | Use Scenario: Bridging Z80-based legacy instrumentation with modern ARM-based data acquisition units via shared parallel bus. IC Role / Device Role: Octal inverting buffer enabling bidirectional data flow while preventing back-driving of legacy peripherals. Use Value: 7.8 mA drive strength ensures clean signal edges across 15 cm ribbon cable runs at 2 MHz clock rates. |
| Automated Test Equipment (ATE) Signal Routing | Embedded Display Controller Interface |
Use Scenario: Multiplexing test pattern generators to multiple DUT sites in semiconductor final test handlers. IC Role / Device Role: 3-state bus driver selecting one of eight parallel test channels under FPGA control. Use Value: 9 ns propagation delay and <15 ns transition time maintain setup/hold timing integrity at 33 MHz test clock speeds. | Use Scenario: Level-shifting and buffering RGB pixel data lines between 1.8 V display controller and 3.3 V TFT panel interface. IC Role / Device Role: Inverting buffer isolating controller outputs from capacitive panel traces while preserving signal polarity. Use Value: Input clamp diodes eliminate need for external protection diodes when panel ESD events couple into data lines. |
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 |
|---|---|---|---|
| SN74HC240N | DIP-20 package; no thermal pad; Ptot = 500 mW but derates at 12.3 mW/K above 109 °C | Suitable only for through-hole prototyping or low-density PCBs; lacks TSSOP's space efficiency | Select when manual soldering or socket-based validation is required; avoid for high-density SMT production. |
| 74HCT240PW,118 | TTL-compatible inputs (VIH = 2.0 V min); identical pinout and timing; same TSSOP20 package | Enables direct replacement in 5 V systems with legacy TTL logic without redesigning input bias networks | Choose when interfacing with 74LS/74ALS families; retains full functional equivalence except input threshold. |
Compared with SN74HC240N, the 74HC240PW,118 offers 35 % smaller footprint and superior thermal performance in reflow assembly; versus 74HCT240PW,118, it provides higher noise immunity in mixed-voltage 3.3 V domains but requires level-shifted inputs in pure 5 V TTL systems.
Availability
74HC240PW,118 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded display interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC240PW,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 essential semiconductors for power management, logic, analog, and MOSFETs, serving automotive, industrial, and consumer markets with high-volume, high-reliability components.
The 74HC240 belongs to Nexperia's HC logic family, designed specifically for low-power, high-noise-immunity digital interfacing in industrial control, instrumentation, and legacy system upgrades where pin compatibility and wide VCC tolerance are critical.
FAQ
What is the maximum output current per pin for 74HC240PW,118?
The absolute maximum DC output current per pin is ±35 mA, but the recommended operating condition specifies ±7.8 mA at VCC = 4.5 V for guaranteed timing and voltage levels. Exceeding ±7.8 mA may increase propagation delay beyond 30 ns and raise VOL above 0.26 V, risking logic-level violations in cascaded stages.
Can 74HC240PW,118 operate at 3.3 V supply?
Yes - the device is fully specified from 2.0 V to 6.0 V, including 3.3 V. At VCC = 3.3 V, VIH = 2.31 V (min), VOL = 0.33 V (max at IO = 6.0 mA), and tpd = 15 ns (max), making it suitable for 3.3 V LVTTL and mixed-signal interfaces without level shifters.
Is the exposed pad on the TSSOP20 package electrically connected?
No - the thermal pad on SOT360-1 (TSSOP20) is not electrically connected to any internal node. Per Nexperia documentation, it may remain floating or be tied to GND for thermal improvement, but must never be connected to VCC or signal nets to avoid parasitic coupling or latch-up risk.
How does 74HC240PW,118 differ from 74HC244?
The 74HC240PW,118 provides inverting outputs and dual OE control (1OE/2OE), while the 74HC244 is non-inverting with single OE. This makes the 240 ideal for bus inversion and differential signaling prep, whereas the 244 suits unidirectional data latching. Pinouts are incompatible due to different OE placement and output polarity mapping.
74HC240PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74HC240PW,118 FAQ
1.How can I place an order for 74HC240PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC240PW,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 74HC240PW,118 reliable?
The price and inventory of 74HC240PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC240PW,118 is usually 5 days.
3.What payment methods are accepted for 74HC240PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC240PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC240PW,118?
74HC240PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC240PW,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 74HC240PW,118?
For technical support, including 74HC240PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC240PW,118 requirements.
6.How does Aetrix verify that 74HC240PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HC240PW,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 74HC240PW,118 meets industry standards.
7.What is the process for return or replacement of 74HC240PW,118?
All 74HC240PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC240PW,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 74HC240PW,118 part is unused and in its original packaging.
Return procedure for 74HC240PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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