ICL3237IA-T

Overview

The ICL3237IA-T is a single-channel RS-232 transceiver manufactured by Renesas Electronics Corporation, housed in a 28-pin SSOP package. It operates within a supply voltage range of +3V to +5.5V and supports data rates up to 1Mbps. The device integrates five drivers and three receivers, along with a noninverting monitor receiver for wake-up functionality. It features manual powerdown control, reducing standby current to 1µA. The component meets EIA/TIA-232 specifications at 3V and includes ±15kV ESD protection on RS-232 pins.

Feature Summary

• Integrated charge pumps generate internal ±5.5V supplies using only four external capacitors
• Manual shutdown pin controls power consumption, achieving 1µA standby current
• Noninverting monitor receiver remains active during shutdown for ring indicator monitoring
• Pin-selectable data rate via MBAUD input for 250kbps or 1Mbps operation

Applications

• Battery-powered handheld devices such as PDAs and Palmtops
• Portable computers including notebooks and laptops
• Cellular and mobile phones requiring low-power serial communication
• Peripherals like modems and printers in space-constrained designs

Procurement Notes

Verify the specific ordering suffix to confirm packaging format. The base part number ICL3237IA denotes an industrial temperature range of -40°C to +85°C. The '-T' suffix indicates tape and reel packaging. Confirm RoHS compliance status if required for assembly processes. Ensure moisture sensitivity level handling procedures are followed during storage and soldering.

Selection Notes

Select this component when system design requires compatibility with both 3.3V and 5V logic families. The manual powerdown feature is suitable for applications needing extended battery life without automatic wake-up detection. Verify that the external capacitor values match the operating voltage requirements specified in the datasheet tables. Consider the 28-lead SSOP package dimensions for board layout constraints.

Part Context

This device belongs to the Intersil ICL32XX family of 3V RS-232 transceivers. It serves as a drop-in replacement for the MAX3237. The ICL3237 variant specifically provides five drivers and three receivers. The IA suffix identifies the industrial temperature grade version of this interface controller.

Replacement Considerations

The datasheet explicitly lists the MAX3237 as a compatible drop-in replacement. Verify pinout compatibility and electrical parameters before substitution. Other members of the ICL32XX family may offer different driver/receiver counts or automatic powerdown features.