SNJ54BCT240J

Overview

The SNJ54BCT240J is a military-grade octal buffer and line driver featuring 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 provides eight three-state outputs with symmetrical active-low output-enable inputs. Key electrical characteristics include a high-level output current of -12 mA and a low-level output current of 48 mA at 5 V. Propagation delays are specified as 6.4 ns maximum for tPLH/tPHL and 9.2 ns maximum for tPZH/tPZL under standard test conditions.

Feature Summary

• State-of-the-art BiCMOS design significantly reduces quiescent current consumption compared to standard bipolar logic families.
• Three-state outputs are specifically designed to drive bus lines or buffer memory address registers without external termination.
• ESD protection capabilities exceed JESD 22 standards, offering robustness against 2000-V human-body model discharges.

Applications

• Memory address drivers in high-density storage systems
• Clock distribution networks requiring precise timing control
• Bus-oriented receivers and transmitters in military communication equipment

Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the CDIP-20 package configuration required for your application. Confirm that the military grade qualification aligns with project specifications. Ensure compatibility with existing board layouts regarding pin assignments and thermal management requirements for ceramic packages.

Selection Notes

Select this component when high fan-out and improved fan-in capabilities are necessary for signal integrity. The symmetrical OE inputs simplify control logic design compared to complementary enable schemes. Consider the BiCMOS technology benefits for applications demanding lower power dissipation while maintaining high-speed performance levels.

Part Context

This part belongs to the SN54BCT240 family, which includes noninverting variants like the SN54BCT241 and SN54BCT244. These devices offer complementary output configurations to support diverse digital interface architectures. The SNJ54BCT240J specifically denotes the military version housed in a ceramic dual in-line package suitable for harsh environments.

Replacement Considerations

SNJ54BCT240FK (LCCC package)

FAQ

How should unused inputs be handled to ensure proper operation?

All unused inputs must be held at VCC or GND to prevent floating states that could affect device reliability.

What is the recommended method to ensure high-impedance state during power-up?

The OE pin should be tied to VCC through a pullup resistor to ensure the high-impedance state during power-up or power-down sequences.