SNJ54BCT541J

Overview

The SNJ54BCT541J is an octal buffer and line driver featuring three-state outputs, manufactured using state-of-the-art BiCMOS technology. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -55°C to 125°C. The device utilizes a 20-pin Ceramic Dual In-Line Package (CDIP). Key electrical characteristics include a low-level output current capability of 48 mA and a high-level output current of -12 mA at 4.5 V. Propagation delays are specified with maximum values of 6.3 ns for tPLH and 8.7 ns for tPHL under standard test conditions.

Feature Summary

• Features inputs and outputs on opposite sides of the package to facilitate printed-circuit-board layout.
• Incorporates P-N-P inputs to reduce DC loading on driving circuits.
• Includes dual active-low output-enable inputs that force all outputs to a high-impedance state when asserted.

Applications

• Driving bus lines in digital systems.
• Buffering memory address registers.
• High-performance register applications requiring wide operating temperatures.

Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the CDIP package variant. Confirm military-grade qualification requirements if applicable, as indicated by the SNJ prefix. Check for RoHS compliance status, noting that this specific ceramic package may not adhere to standard lead-free directives compared to commercial plastic packages. Ensure design compatibility with the -55°C to 125°C temperature rating.

Selection Notes

Select this component for designs requiring robust drive strength and wide thermal tolerance. The BiCMOS technology offers significantly reduced quiescent current compared to older logic families. Consider the physical dimensions of the 20-CDIP package for board space constraints. Verify that the input voltage levels align with the system's logic standards, as the device accepts TTL-compatible inputs.

Part Context

This part belongs to the SN54BCT541 family, which includes commercial variants like the SN74BCT541A. The SNJ designation typically indicates a military or aerospace-grade version produced under specific quality controls. It shares functional similarities with other octal buffers but distinguishes itself through its packaging and extended temperature specifications suitable for harsh environments.

Replacement Considerations

SNJ54BCT541W

FAQ

How does the device handle power-up states?

To ensure the high-impedance state during power up or power down, the OE inputs should be tied to VCC through a pullup resistor.

What is the function of the two output-enable pins?

The 3-state control gate consists of two active-low inputs; if either OE1 or OE2 is high, all eight outputs enter the high-impedance state.