BD3381EKV-CE2

Specialized Overview

The BD3381EKV-CE2 is a multi-input switch LSI designed for automotive applications, featuring 33 channels of SPST switch inputs. It operates within a supply voltage range of 6 V to 28 V and supports an SPI interface with a maximum clock frequency of 4.4 MHz. The device includes selectable wetting currents (1 mA to 15 mA) and offers intermittent monitoring modes to reduce power consumption. It is qualified under AEC-Q100 Grade 1 standards and functions reliably across an operating temperature range of -40°C to +125°C.

Specialized Feature Summary

• Integrates 33 switch input channels with configurable pull-up/pull-down wetting currents to ensure reliable contact detection.
• Supports intermittent monitoring modes that sample switch states at fixed intervals to minimize active power consumption.
• Includes built-in thermal shutdown protection and power-on reset circuits to maintain system integrity during abnormal conditions.

Specialized Applications

• Monitoring mechanical switch states in automotive body control modules
• Detecting door, window, or seat position changes via MCU interrupt generation
• Low-power sensor interface systems requiring periodic state verification

Specialized Procurement Notes

Verify the specific suffix CE2 matches the required tape-and-reel packaging configuration. Confirm AEC-Q100 Grade 1 qualification aligns with target automotive reliability standards. Check RoHS compliance documentation for environmental regulatory adherence. Ensure HTQFPBV-64 package dimensions fit the designated PCB footprint constraints.

Specialized Selection Notes

Select this component when a high-channel-count switch matrix is required for automotive environments. Evaluate the 6 V to 28 V input range against the vehicle's battery voltage profile. Consider the 4.4 MHz SPI speed if rapid state polling is necessary. Verify that the 12x12 mm package size accommodates the available board space without thermal interference.

Specialized Part Context

This part belongs to ROHM’s automotive-grade switch LSI family, specifically engineered for body electronics and interior control applications. It replaces discrete switch scanning solutions by integrating multiple channels into a single serially accessible unit. The design emphasizes noise immunity and low standby current for modern vehicle energy management strategies.

Specialized Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model. Engineering teams should evaluate other ROHM switch LSIs with compatible channel counts and SPI interfaces if availability is constrained.