SN74ABT540DB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ABT540DB is an octal bus driver with tri-state outputs from Texas Instruments in the ABT logic family. It features unidirectional 8-bit buffering with active-low output enable and 64 mA sink current capability for driving heavy bus loads. Available in compact SSOP-20 package with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ABT540DB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal unidirectional bus driver in ABT logic family with 64 mA output sink current for driving high-capacitance bus lines up to 50 pF
- Active-low output enable control providing tri-state operation for shared bus architectures and bus isolation
- ABT (Advanced BiCMOS Technology) logic family delivering high-speed, low-noise bus driving performance
- SSOP-20 surface-mount package enabling compact PCB designs for bus interface and buffering applications
Applications
The SN74ABT540DB is used in microprocessor and DSP systems for data bus buffering, address line driving, and high-fan-out signal distribution where strong drive capability is required. It is commonly applied in memory interface circuits, backplane bus drivers, and peripheral interface cards where the ability to drive multiple loads simultaneously is essential. Industrial automation controllers, computing systems, and communication equipment rely on its robust bus driving performance and tri-state output control.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ABT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.064A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| 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 |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 30mA |
| Prop. Delay@Nom-Sup | 4.8ns |
| Propagation Delay (tpd) | 4.8ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| 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 | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the function of the SN74ABT540DB?
The SN74ABT540DB is an octal (8-bit) unidirectional bus driver with tri-state outputs. It buffers and drives data from input to output in one direction, with active-low output enable control that places all outputs in high-impedance state when not driving the bus.
What is the output drive capability of the SN74ABT540DB?
The SN74ABT540DB has a maximum output low current (IOL) of 64 mA per output, with a specified load capacitance of 50 pF. This strong drive capability makes it suitable for driving long bus traces and multiple receiver inputs in backplane and board-level bus architectures.
What logic family does the SN74ABT540DB belong to?
The SN74ABT540DB belongs to the ABT (Advanced BiCMOS Technology) logic family, which combines bipolar and CMOS transistor technologies for fast switching speeds with low power consumption. ABT provides improved drive strength and speed compared to standard CMOS logic families.
What package does the SN74ABT540DB use?
The SN74ABT540DB is available in an SSOP-20 (Shrink Small Outline Package with 20 pins) surface-mount package as indicated by its JESD-30 code R-PDSO-G20. This compact SMD package is commonly used in high-density digital logic and bus interface designs.
How does the output enable function work on the SN74ABT540DB?
The SN74ABT540DB uses an active-low output enable (OE) control input. When OE is low, all eight outputs are enabled and drive the buffered input signals. When OE is high, all outputs enter a high-impedance tri-state condition, allowing multiple SN74ABT540DB devices to share a common bus without signal contention.
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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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