ISL43L121IU

The ISL43L121IU is a low-voltage, low-power logic device which belongs to the family of analog switches, multiplexers, and demultiplexers. It is a dual, single-pole-double-throw (SPDT) switch featuring “soft” break-before-make switching to eliminate ground Bounce. This device uses CMOS logic to operate at data rates up to 2kHz, and can be configured with one or two single-pole-double-throw switches by the combination of control signal inputs (EN and OE).

The ISL43L121IU is designed and manufactured to perform best in applications such as signal switching, signal routing, connection switching and analog signal groupings. With its low power consumption and low voltage operation, it can easily replace electromechanical switches in many applications. It can also be used for controlling switchable loads. Similarly, it finds application in signal routing and routing networks, in many communication and telecom, automotive, audio and portable devices.

Features and Advantages

The ISL43L121IU is capable of operating from a supply voltage of 1.65 V to 5.5 V, making it suitable for many applications. Some of the features and advantages of this device include:

• Low-voltage & Low-power Supply: supply voltage range of 1.65 V to 5.5 V and low power consumption of 20-µA idle current
• Low Switching Blank Time: short switching blank time of 40-ns for single switch
• Soft Break-before-Make Switching: eliminates ground bounce and prevents crosstalk.
• 1800 V minimum BMC: HBM, provided by 35 and 35 N

Working Principle

The ISL43L121IU is a dual SPDT switch actuated by logic signal EN and OE on-the-fly. The EN signal provides soft break-before-make switching. When EN is "low", the switch remains in the last poistion, and the OE signal has no effect, regardless of the logic level. When the EN signal is "high", the switch position is determined by the logic level of the OE signal. The EN signal must remain high for a minimum of 15ns before the switch position can be changed.

Selection Guide

The following parameters should be considered when selecting the ISL43L121IU for a specific application:

• Supply Voltage Range
• Switching Blank Time
• Input Reach-In Voltage
• Output Rise & Fall Times
• Package Option

Applications

As a single-pole double-throw (SPDT) switch, the ISL43L121IU can be used in a variety of applications. These applications include:

• Mobile Devices
• Cable & Satellite Set-top Boxes
• Screen Displays
• Switchable Loads
• Audio Amplifiers
• Automotive & Avionics
• Telecommunications
• Routing Networks
• RF Signal Switching & Routing

Conclusion

The ISL43L121IU is an ideal choice for applications that require low-voltage and low-power operation, soft break-before-make switching, and low-current/low-voltage switching. With its small on-chip area and wide supply voltage range, this device can be used for a variety of applications.