SN74LS240DBRIn StockTexas Instruments
SN74LS240DBR is an octal bus driver IC with inverting outputs and active-low enable control, featuring 45pF load capacitance and 24mA output current. From $0.66 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS240DBR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6658(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal inverting bus driver with active-low enable for unidirectional data flow control
- Supports 45pF load capacitance with 24mA output current for robust bus driving
- LS-family TTL logic in compact 20-pin SOIC package for space-efficient PCB layouts
- Pb-free (e4) compliant with 15-year YTEOL for long-term supply reliability
Applications
The SN74LS240DBR is widely used in data bus buffering and signal isolation applications in industrial control systems, embedded computing boards, and memory address/data bus expansion. Its inverting octal driver architecture makes it ideal for backplane bus interfaces, microprocessor peripheral interfacing, and driving capacitive loads in communications equipment. The active-low enable inputs allow easy daisy-chaining and bus arbitration in multi-master system designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 45pF |
| 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 | SSOP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR, 13 INCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 50mA |
| Prop. Delay@Nom-Sup | 18ns |
| Propagation Delay (tpd) | 18ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output current and load capacitance of the SN74LS240DBR?
The SN74LS240DBR provides a maximum output low current (I_OL) of 24mA and supports a load capacitance (CL) of up to 45pF, making it suitable for driving moderate capacitive bus loads in TTL-compatible systems.
What package does the SN74LS240DBR come in and what are its dimensions?
The SN74LS240DBR is packaged in a 20-pin Small Outline IC (SOIC) package, designated JESD-30 code R-PDSO-G20. This surface-mount package is compact and well-suited for high-density PCB designs in space-constrained applications.
What are common applications for the SN74LS240DBR?
The SN74LS240DBR is commonly used as an octal inverting bus driver in microprocessor data and address bus buffering, memory interface expansion, industrial control logic boards, and backplane signal driving where active-low enable control and TTL logic compatibility are required.
Is the SN74LS240DBR RoHS compliant and what is its longevity outlook?
Yes, the SN74LS240DBR is Pb-free (JESD-609 code e4) and RoHS compliant. It has a YTEOL (Years To End Of Life) rating of 15 years, indicating strong supply chain longevity for long-lifecycle industrial and embedded system designs.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.1400 | $1.14 |
| 1000+ | $0.8000 | $800.00 |
| 2000+ | $0.7000 | $1400.00 |
| 4000+ | $0.6800 | $2720.00 |
| 6000+ | $0.6752 | $4051.26 |
| 10000+ | $0.6658 | $6658.30 |
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