SN74HC240N-NG Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
SN74HC240N-NG is a high-speed CMOS octal buffer and line driver with 3-state outputs and inverted logic. It features 8 inputs, 5V operation, and active-low output enable. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC240N-NG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HC240N-NG?
- Octal 3-state inverting buffers with active-low output enables for flexible bus control
- High-speed CMOS technology with typical propagation delay of 8 ns at 5V supply
- Wide supply voltage range from 2V to 6V for multi-rail system compatibility
- 20-pin DIP package enabling straightforward through-hole PCB assembly
What is SN74HC240N-NG used for?
The SN74HC240N-NG is widely used in microprocessor bus buffering, memory address line driving, and data bus isolation in digital systems. Its inverted 3-state outputs make it ideal for bidirectional bus expansion and signal conditioning in industrial control and computing equipment. The device is commonly deployed in address decoders, line drivers, and clock distribution circuits operating at 5V logic levels.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SN74HC240N-NG datasheet?
SN74HC240N-NG Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HC240N-NG?
Compatible alternatives and drop-in replacements for SN74HC240N-NG:
Bus Driver, HC/UH Series, 2-Func, 4-Bit, Inverted Output, CMOS, PDSO20
Bus Driver, HC/UH Series, 2-Func, 4-Bit, Inverted Output, CMOS, PDSO20
Bus Driver, HC/UH Series, 2-Func, 4-Bit, Inverted Output, CMOS, PDSO20
Frequently Asked Questions
How fast is the SN74HC240N-NG and what supply voltage does it require?
The SN74HC240N-NG operates on a supply voltage from 2V to 6V and achieves typical propagation delays of 8 ns at 5V, making it suitable for high-speed digital bus applications up to tens of MHz. Its CMOS technology keeps quiescent current very low.
Which bus architectures can the SN74HC240N-NG drive in embedded system designs?
The device's 8 inverting 3-state buffers with active-low output enables allow it to drive 8-bit address or data buses in microcontroller and FPGA designs. Each output can source and sink 6 mA, supporting standard CMOS and TTL loads across the 2V to 6V supply range.
When is the SN74HC240N-NG preferred over a non-inverting buffer such as SN74HC244N?
Designers choose the SN74HC240N-NG when inverted logic is required in address decoding or active-low enable chains, eliminating an external inverter stage. It offers the same 20-pin DIP footprint and 8 channels as SN74HC244N, but with complementary polarity, reducing component count in many 5V bus designs.
What thermal and operating temperature limits apply to the SN74HC240N-NG?
The SN74HC240N-NG is rated for commercial operation from 0°C to 70°C ambient temperature. Its 20-pin plastic DIP package has a typical thermal resistance of approximately 67°C/W, and power dissipation is negligible at CMOS quiescent currents below 80 µA at 6V.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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