The MAX3325 integrates a two-transmitter, two-receiver RS-232 transceiver with an LCD supply plus tempera- ture-compensated contrast control
The MAX3325 is a 3 V dual‑transmitter, dual‑receiver RS‑232 transceiver that also provides a regulated 5 V LCD supply and a temperature‑compensated contrast controller. It is designed for small battery‑powered instruments that need both serial communication and an LCD display, offering single‑supply operation from 3.0 V to 3.6 V.
Key features include a 6‑bit DAC with 64 contrast levels, an internal temperature sensor for LCD contrast compensation, independent shutdown of the RS‑232 and LCD sections, and availability in 28‑pin SSOP or narrow‑DIP packages. The datasheet lists absolute maximum ratings, electrical and timing characteristics, pin descriptions, typical application circuits and package dimensions.
| Supply voltage range | 3.0 V to 3.6 V |
|---|---|
| DAC resolution | 6 bits (64 levels) |
| LCD supply output current | 11 mA at 5 V |
| Package options | 28‑pin SSOP or narrow DIP |
It operates from a single supply of 3.0 V to 3.6 V.
The internal 6‑bit DAC provides 64 contrast levels.