Key facts
- Brand
- Maxim
- Model
- MAX325
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2012-05-08
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Maxim MAX3250 RS-232 Transceiver Datasheet
The MAX3250 is a +50 V isolated EIA/TIA‑232 and V.28/V.24 communications interface that operates from a 3.0 V to 5.5 V supply. It provides two transmitters and two receivers, guarantees 250 kbps data rates, and includes a FAULT open‑drain output for over‑voltage protection. The device is supplied in a space‑saving 28‑pin SSOP package and is intended for noisy industrial environments, point‑of‑sale equipment, telecom gear and other applications requiring high common‑mode voltage isolation.
Key features include indeterminate‑/transformer‑less isolation, low‑power shutdown (≈20 µA), high‑impedance outputs in shutdown, and a dual charge‑pump voltage converter that generates ±5.5 V on the isolated side. The datasheet provides detailed electrical characteristics, timing specifications, recommended capacitor values, layout guidelines, and ordering information.
Maxim MAX325 specifications
| Isolation Voltage | +50 V |
|---|---|
| Supply Voltage (logic side) | 3.0 V to 5.5 V |
| Data Rate | 250 kbps (guaranteed) |
| Drivers / Receivers | 2 Tx, 2 Rx |
| Shutdown Supply Current | ≈20 µA |
| Operating Temperature Range | -40 °C to +85 °C (MAX3250EAI) |
| Package | 28‑pin SSOP |
| Isolation Resistance | 60 kΩ |
| Fault Output | Open‑drain, active low |
All Maxim MAX325 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum isolation voltage of the MAX3250?
The device provides up to +50 V isolation between the RS‑232 side and the logic side.
How much supply current does the MAX3250 draw in shutdown mode?
In shutdown the MAX3250 draws about 20 µA of supply current.
What supply voltage range do the MAX323/324/325 operate from?
They operate from +2.7 V to +16 V.
From: Maxim MAX323/MAX324/MAX325 Precision Single‑Supply SPST Analog Switches Datasheet
What is the typical on‑resistance of these switches?
The on‑resistance is 33 Ω typical and up to 60 Ω maximum.
From: Maxim MAX323/MAX324/MAX325 Precision Single‑Supply SPST Analog Switches Datasheet
What isolation voltage does the MAX3250 provide?
It provides up to +50 V of isolation between the RS‑232 side and the logic side.
What package is the MAX3250 offered in?
The part is available in a 28‑pin SSOP package.