BU92001KN-E2

Overview

The BU92001KN-E2 is a silicon monolithic integrated circuit functioning as an IrDA SIR encoder and decoder. It supports communication rates from 2.4 kbps to 115.2 kbps via a UART interface. The device operates within a supply voltage range of 2.5 V to 3.5 V, with a recommended typical value of 3.0 V. It requires a clock input frequency between 24.0 MHz and 30.0 MHz, typically 27.8 MHz. The IC is housed in a VQFN-20 package and functions within an operating temperature range of -25 °C to +85 °C.

Feature Summary

• Integrates IrDA SIR encoding and decoding capabilities alongside a standard UART interface for serial data transmission.
• Provides selectable baud rate configuration through a dedicated setup pin and supports variable communication speeds.
• Includes internal clock management features with specific output pins for derived clock frequencies.

Applications

• Short-range wireless infrared communication modules
• Serial data link interfaces requiring IrDA compliance
• Consumer electronic devices with infrared connectivity

Procurement Notes

Verify the current lifecycle status before procurement, as this component may be discontinued or subject to limited availability. Confirm that the VQFN-20 package dimensions align with the target PCB footprint. Ensure the design accommodates the specified humidity sensitivity class and storage temperature limits during handling and assembly processes.

Selection Notes

Select this component when a dedicated IrDA SIR codec is required with low power consumption characteristics. Verify that the system clock source can provide the necessary 27.8 MHz input frequency. Ensure the application environment remains within the -25 °C to +85 °C operating range and does not require radiation tolerance.

Part Context

This part belongs to the BU92001KN series of interface ICs manufactured by ROHM Semiconductor. It is specifically designed for infrared data association physical layer implementations. The suffix E2 indicates specific manufacturing or compliance variations within the product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult ROHM sales representatives for potential alternatives if this component is no longer in production.

FAQ

Is the BU92001KN-E2 designed to be radiation tolerant?

No, the datasheet explicitly states that the IC is not designed for endurance of radiation.

What is the maximum supply voltage allowed?

The absolute maximum rating for supply voltage is 4.5 V, though the recommended operating range is 2.5 V to 3.5 V.

How many pins are unused in the VQFN-20 package?

There are seven pins designated as No Connection (N.C.), specifically pins 3, 6, 10, 13, 16, 19, and 20.