SN74ALS240ANIn StockTexas Instruments
The SN74ALS240AN is an octal buffer/line driver with 3-state outputs, featuring active-low enable control and 24mA output current capability. Built on Texas Instruments ALS logic family for high-speed, low-power performance. From $0.90 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74ALS240AN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8979(MOQ 10)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal 3-state outputs with active-low enable for easy bus interfacing
- 24mA output sink current (IOL) for robust load driving capability
- ALS (Advanced Low-power Schottky) family delivers high speed with reduced power consumption
- Unidirectional buffer design ideal for address bus buffering and signal isolation
- Standard PDIP-20 package for easy through-hole prototyping and assembly
Applications
The SN74ALS240AN is widely used in microprocessor and microcontroller address/data bus buffering applications where signals must be driven across long PCB traces or multiple loads. It is suitable for memory interface circuits, industrial control systems, and legacy TTL-compatible designs requiring reliable signal isolation and bus management. The 3-state output capability also makes it ideal for shared bus architectures in embedded systems and communication equipment.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ALS |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 4 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 25mA |
| Prop. Delay@Nom-Sup | 9ns |
| Propagation Delay (tpd) | 9ns |
| Qualification Status | Not Qualified |
| Screening Level | MIL-PRF-38535 |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ALS240AN:
Frequently Asked Questions
What is the output current rating of the SN74ALS240AN?
The SN74ALS240AN supports a maximum output sink current (IOL) of 24mA per output, making it capable of driving standard TTL and CMOS loads effectively in bus driving applications.
What logic family does the SN74ALS240AN belong to and what are its key advantages?
The SN74ALS240AN belongs to the ALS (Advanced Low-power Schottky) logic family. This family offers a good balance of high switching speed and reduced power consumption compared to standard LS TTL, making it ideal for performance-sensitive digital systems.
What package type is the SN74ALS240AN available in?
The SN74ALS240AN is available in a 20-pin PDIP (Dual-In-Line Package) through-hole package, which is well-suited for prototyping, through-hole PCB assembly, and applications where socketed ICs are required.
Can the SN74ALS240AN be used as a replacement for other octal buffer ICs?
Yes, the SN74ALS240AN is pin-compatible with other ALS/LS series octal buffers such as the SN74LS240. It can also serve as a drop-in replacement for many standard 3-state octal buffer/driver ICs, provided the logic levels and supply voltage (5V) are compatible.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.2500 | $12.50 |
| 20+ | $1.1600 | $23.20 |
| 100+ | $1.0800 | $108.00 |
| 1000+ | $0.9509 | $950.91 |
| 2500+ | $0.9178 | $2294.55 |
| 5000+ | $0.8979 | $4489.35 |
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