Renesas Electronics Corporation Drivers, Receivers, Transceivers ISL4221EIRZ-T

The ISL4221EIRZ-T is a single driver, single receiver RS-232 transceiver designed for low-power applications. It operates within a voltage range of +2.7V to +5.5V and ensures compliance with EIA/TIA-232 and V.28/V.24 specifications even at a supply voltage of 3V. The device features ±15kV ESD protection on its I/O pins, making it suitable for environments where electrical discharge may be a concern. This transceiver is packaged in a compact 5mm x 5mm QFN format, which is 40% smaller than traditional 20-lead TSSOP packages, allowing for space-constrained designs. It supports a minimum data rate of 250kbps and includes on-chip voltage converters that require only four external 0.1µF capacitors for operation. The ISL4221EIRZ-T also incorporates manual and automatic powerdown features, reducing supply current to just 150nA in standby mode, which is advantageous for battery-powered devices. Target applications include handheld products, PDAs, and portable equipment where low power consumption and compact size are critical. The device is RoHS compliant, ensuring it meets environmental regulations.