MAX3243E is a 3-V to 5.5-V multichannel RS-232 line driver/receiver with ±15-kV IEC ESD protection. It is a single-chip and single-supply interface for IBM™ PC/AT™ serial port. The device meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards, and operates with a 3-V to 5.5-V VCC supply. MAX3243E features an always-active noninverting receiver output (ROUT2B) and is designed to transmit at a data rate up to 500 kbit/s. Additionally, the device features low standby current (1 µA typical) and external capacitors (4 × 0.1 µF). MAX3243E accepts 5-V logic input and is compatible with a 3.3-V supply. The device is interchangeable with Maxim MAX3243E and features an auto-powerdown feature to disable driver outputs when no valid RS-232 signal is sensed. MAX3243E can be used for battery-powered systems, PDAs, POS terminals, telephone terminals, industrial and medical equipment, and other applications.
The MAX3243E device provides three line drivers, five line receivers, and a dual charge‑pump circuit for RS‑232 communication. It operates from a single 3‑V to 5.5‑V supply and meets TIA/EIA‑232‑F requirements, making it suitable for IBM PC/AT‑compatible serial ports and handheld equipment.
Key features include an always‑active non‑inverting output, auto‑powerdown mode that disables drivers when no valid RS‑232 signal is present, and multiple package options (DB, DW, PW). The device is rated for +15‑kV HBM and +8‑kV IEC61000‑4‑2 ESD protection and functions over a temperature range of –40 °C to 85 °C (MAX3243EL).
| Supply voltage range | 3 V to 5.5 V |
|---|---|
| ESD protection (HBM) | +15 kV |
| Number of line drivers | 3 |
| Number of line receivers | 5 |
| Operating temperature range (MAX3243EL) | -40 °C to 85 °C |
| Package options | DB, DW, PW (plastic small‑outline, shrink small‑outline, thin shrink small‑outline) |
The MAX3243E contains three line drivers and five line receivers.
The device operates from 3 V up to 5.5 V supply voltage.