PDF MAX3238 Download

Description

The MAX3238 consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows
applications using the ring indicator to transmit data while the device is powered down. These devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

Features 

RS-232 Bus-Pin ESD Protection Exceeds
±15 kV Using Human-Body Model (HBM)
Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
Operates With 3-V to 5.5-V VCCSupply
Operates Up To 250 kbit/s
Five Drivers and Three Receivers
Low Standby Current...1 µA Typical
External Capacitors...4 ×0.1 µF
Accepts 5-V Logic Input With 3.3-V Supply
Always-Active Noninverting Receiver
Output (ROUT1B)
Alternative High-Speed Pin-Compatible
Device (1 Mbit/s)
− SNx5C3238

Applications

− Battery-Powered Systems, PDAs,Notebooks, Subnotebooks, Laptops,Palmtop PCs, Hand-Held Equipment,Modems, and Printers