CD40109BF

Translators, Level Shifters Overview

The CD40109BF is a CMOS quad low-to-high voltage level shifter manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 18 V and supports an operating temperature range from -55 °C to +125 °C. The device features four independent channels in a 16-lead ceramic dual-in-line package (CDIP). It allows flexible sequencing of power application, functioning as either a low-to-high or high-to-low level shifter depending on the relative magnitudes of the VCC and VDD supplies.

Translators, Level Shifters Feature Summary

• Flexible power-up sequence without restrictions on the order of applying VDD, VCC, or input signals
• Bidirectional shifting capability that adapts based on whether VCC exceeds VDD or vice versa
• Input signal tolerance allowing voltages to exceed both VCC and VDD limits

Translators, Level Shifters Applications

• Military and defense applications requiring QML certification
• Systems interfacing between different logic families with varying voltage levels
• High-reliability electronic circuits where flexible power sequencing is required

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'F' indicates the ceramic dual-in-line package (CDIP) configuration. Confirm RoHS exemption status as indicated in the packaging data. Ensure the procurement channel provides documentation for military-grade qualification if required for the intended application environment.

Translators, Level Shifters Selection Notes

Select this component when a robust ceramic package is necessary for harsh environments. Consider the bidirectional shifting feature if the design requires adapting to changing voltage hierarchy conditions. Verify that the input signal swing meets the minimum requirement relative to VCC for proper operation.

Translators, Level Shifters Part Context

This part belongs to the CD40109B series of voltage level shifters. It is distinct from plastic variants like the CD40109BE due to its ceramic construction. The device is designed to bridge voltage gaps between digital logic systems without requiring strict power-on sequencing protocols.

Translators, Level Shifters Replacement Considerations

CD40109BE.A

Translators, Level Shifters FAQ

Does the CD40109BF require VDD to be applied before VCC?

No, there are no restrictions on the sequence of application of VDD, VCC, or the input signals.

Can the CD40109BF operate as a high-to-low level shifter?

Yes, when operated in the mode where VCC > VDD, the device functions as a high-to-low level shifter.