SN54LS540J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The SN54LS540J is an 8-channel inverting 3-state bus driver from Texas Instruments in a 20-pin ceramic DIP package. It features dual output enable controls with active-low enable inputs for the LS TTL logic family, supporting military and high-reliability applications. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN54LS540J Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN54LS540J?
- 8-channel inverting 3-state bus driver with dual active-low output enable for independent bus segment control and high-impedance isolation
- LS TTL logic family provides low-power Schottky operation with bipolar transistor outputs for reliable bus driving at standard 5V supply
- 20-pin ceramic DIP package with YTEOL rating for long-term availability in military, industrial, and high-reliability system designs
What is SN54LS540J used for?
The SN54LS540J is used in digital bus driving and buffering applications where inverting logic and 3-state outputs are needed, such as data bus isolation, address bus buffering in microprocessor systems, and backplane drivers. Its dual output enable and ceramic package make it suitable for military-grade computing and rugged industrial control equipment.
What are the specifications of SN54LS540J?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | WITH DUAL OUTPUT ENABLE |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | LS |
| JESD-30 Code | R-GDIP-T20 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 45pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 52mA |
| Prop. Delay@Nom-Sup | 15ns |
| Propagation Delay (tpd) | 15ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the SN54LS540J datasheet?
SN54LS540J Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN54LS540J?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output configuration of the SN54LS540J?
The SN54LS540J features 8-channel inverting 3-state outputs, meaning each output inverts the input logic level and can be placed in a high-impedance state when disabled. The 3-state capability allows multiple drivers to share a common bus without conflict when properly sequenced with the dual output enable pins.
What logic family does the SN54LS540J belong to?
The SN54LS540J belongs to the LS (Low-power Schottky) TTL logic family, operating at a 5V supply voltage. LS devices offer a good balance of speed and power consumption, with typical propagation delays and output drive capability suited for standard digital bus interfacing.
What package does the SN54LS540J use and is it suitable for military use?
The SN54LS540J is housed in a 20-pin ceramic dual in-line package (CDIP-20), which provides hermetic sealing for harsh environments. The '54' prefix designation indicates the military temperature range (-55°C to 125°C), making it suitable for defense, aerospace, and high-reliability industrial applications.
How does the dual output enable work on the SN54LS540J?
The SN54LS540J has two active-low output enable pins (OE1 and OE2) that both must be asserted low to enable the outputs. If either enable pin is high, all 8 outputs enter the high-impedance 3-state condition, effectively disconnecting the driver from the bus for safe bus sharing.
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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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