Description:The ISL83220E is a 3. 0V to 5. 5V powered RS-232 transmitter/receiver that meets ElA/TIA-232 and V. 28/V. 24 specifications, even at VCC = 3. 0V. It provides ±15kV ESD protection (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are PDAs, Palmtops, and notebook and laptop computers in which the low operational power consumption and even lower standby power consumption is critical. Efficient on-chip charge pumps, coupled with a manual
Renesas provides a recommended PCB layout guide in their application note AN1995, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize noise.
The selection of input and output capacitors depends on the specific requirements of your application, such as ripple current, voltage rating, and ESR. Renesas recommends using low-ESR capacitors with a voltage rating of at least 1.5 times the maximum input voltage, and following the guidelines in the datasheet for capacitor selection.
The ISL83220EIVZ is rated for operation from -40°C to +85°C ambient temperature, but it's recommended to derate the device's performance and consider thermal management for high-temperature applications.
Renesas recommends following good EMC design practices, such as using a solid ground plane, minimizing loop areas, and using shielding and filtering components as needed. Additionally, the ISL83220EIVZ has built-in EMI filtering and is designed to meet CISPR 22 Class B emissions standards.
The recommended startup sequence is to apply the input voltage (VIN) first, followed by the enable signal (EN). This ensures that the device is properly biased and configured before enabling the output.
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ISL83220EIVZ Overview
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