ICL3232EIAZ-T

ICL3232EIAZ-T is a dual RS-232 line transceiver from Intersil (Renesas). It provides two independent drivers and two receivers to bridge microcontroller/TTL logic with RS-232 serial lines.
Key points:
- Functions: TTL/CMOS to RS-232 level translation (drivers) and RS-232 to TTL/CMOS (receivers).
- Supply: single-supply operation, typically 3.0 to 5.5 V.
- Built-in charge pump: generates the necessary RS-232 voltage swings from a single supply.
- Interfaces: TTL/CMOS inputs and outputs on the logic side; RS-232 voltage levels on the line side.
- Speed: supports standard RS-232 communication (typical speeds up to several Mbps, depending on load and supply).
- Package: EIAZ-T variant (a specific small/lead-free package).
Common uses: embedded serial interfaces, microcontroller direct-to-RS-232 connections, modems, and serial peripherals. It’s a drop-in choice when you need a dual RS-232 transceiver with minimal external components.

Equivalent products are other dual RS-232 transceivers with 2 drivers/2 receivers (3.0–5.5V), often pin-compatible with ICL3232. Examples:
- MAX3232 (Maxim Integrated / now Analog Devices)
- ADM3232 (Analog Devices)
- ST3232 / ST3232E (STMicroelectronics)
- SP3232 (Sipex/Exar lineage)
Note: verify exact pinout and voltage requirements for your PCB.

Concise features of ICL3232EIAZ-T:
- Dual RS-232 driver/receiver (2 TX, 2 RX)
- Single-supply operation from 3.0 V to 5.5 V (suitable for 3.3V MCUs)
- Internal charge pump with external capacitors to generate RS‑232 levels
- Data rates up to about 1 Mbps
- Generates RS‑232 ± voltages (typical output swing ~±6 V)
- TTL/CMOS-compatible inputs and RS‑232-compatible outputs
- Robust RS‑232 voltage tolerance on lines
- Industrial temperature range (-40°C to +85°C)
- Pb-free/RoHS compliant; packaging: Pb-free, Tape & Reel (−T)
- Small 8-pin package (and standard EIAZ packaging indication)

- Pin count: 16 pins (16-pin package).
- Function: Dual RS-232 transceiver (two line drivers and two line receivers). Converts TTL/CMOS logic to RS-232 voltage levels and RS-232 signals back to TTL/CMOS. Uses an internal charge pump to generate RS-232 voltages from a single supply (3.3V or 5V); requires external capacitors. The -T suffix denotes Tape & Reel packaging.

Manufacturer: Renesas Electronics Corporation (Intersil lineage; ICL3232EIAZ-T is from the Intersil “ICL3232” family and is now sold under Renesas after their 2017 acquisition).
What kind of company: A Japanese multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management ICs (including RS-232 transceivers) and microcontrollers.

ICL3232EIAZ-T is a dual RS-232 transceiver. Typical application areas:
- Embedded/ MCU systems needing a RS-232 to logic level interface (serial console, PC/terminal connections)
- Data communication equipment (modems, serial routers, serial interfaces)
- Industrial automation and instrumentation (PLCs, data loggers, sensors, CNC equipment)
- Point-of-sale terminals, printers, and other serial peripherals
- Telecommunications and networking gear and general test/measurement equipment
Used wherever a robust RS-232 front-end is required between a microcontroller and RS-232 devices.

16-pin Small Outline (SO-16) package; the -T suffix indicates Tape & Reel packaging.