Key facts
- Brand
- Maxim
- Model
- MAX322
- Category
- Other Electronics
- Documents
- 24
- Languages
- EN
- Last added
- 2012-05-08
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Maxim MAX3221E/MAX3223E/MAX3243E RS-232 Transceiver User Manual
The MAX3221E, MAX3223E, and MAX3243E are 3‑V‑powered RS‑232 transceivers with automatic shutdown/wakeup, high‑data‑rate capability, and +15 kV ESD protection. They are intended for notebook, handheld, and peripheral applications such as printers and cellular phones.
Key features include Maxim’s AutoShutdown technology that reduces supply current to about 1 µA when no valid RS‑232 signals are present, dual charge‑pump voltage conversion for true RS‑232 levels, and a variety of package options (TQFN, SSOP, TSSOP). The manual provides pin descriptions, electrical and timing specifications, and wiring diagrams for proper integration.
Maxim MAX322 specifications
| Supply Current (ForceOn) | ≈1 µA |
|---|---|
| Maximum Data Rate (MAX3224/3226/3244) | 250 kbps |
| Maximum Data Rate (MAX3225/3227/3245) | 1 Mbps |
| Operating Temperature Range (RoHS packages) | −40 °C to +85 °C |
| Package Types | TQFN, TSSOP, SSOP |
| Charge‑Pump Capacitors Required | Four 0.1 µF capacitors |
Source: Maxim MAX3224/MAX3225/MAX3226/MAX3227/MAX3244/MAX3245 RS-232 Transceiver Datasheet
All Maxim MAX322 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- Maxim MAX3224/MAX3225/MAX3226/MAX3227/MAX3244/MAX3245 RS-232 Transceiver Datasheet 19 p
- Maxim MAX3222/MAX3232/MAX3237/MAX3241 Datasheet 16 p
- Maxim MAX3221E/MAX3223E/MAX3243E RS-232 Transceiver Datasheet 19 p
- Maxim MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E Datasheet 21 p
- Maxim MAX3228/MAX3229 RS-232 Transceiver Datasheet 14 p
- MAXIM MAX3228E/322EAE/3229E/MAX3229AE Manual 16 p
- Maxim MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E Datasheet 22 p
- Maxim MAX3221/MAX3223/MAX3243 RS-232 Transceiver Datasheet 16 p
- MAXIM INTEGRATED PRODUCTS MAX3222E/MAX3232E/MAX3237E/MAX3241E† /MAX3246E ±15kV ESD-Protected Down to 10nA 3.0V to 5.5V Up to 1Mbps True RS-232 Transceivers handbook 29 p
- Maxim MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E Datasheet 21 p
- Maxim MAX3222/MAX3232/MAX3237/MAX3241 Datasheet 16 p
- MAXIM INTEGRATED PRODUCTS MAX3222/MAX3232/MAX3237/MAX3241* 3.0V to 5.5V Low-Power up to 1Mbps True RS-232 Transceivers Using Four 0.1 F External Capacitors handbook 17 p
- Maxim MAX320/MAX321/MAX322 Precision Dual‑Supply SPST Analog Switches Datasheet 8 p
- Maxim MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E Datasheet 26 p
- Maxim MAX3221/MAX3223/MAX3243 RS-232 Transceiver Datasheet 16 p
- Maxim MAX3224/MAX3227/MAX3244/MAX3245 RS-232 Transceiver Datasheet 22 p
- Maxim MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E Datasheet 26 p
- Maxim MAX3222E/MAX3232E/MAX3237E/MAX3241E Datasheet 20 p
- Maxim MAX3221E/MAX3223E/MAX3243E Datasheet 16 p
- Maxim MAX3222/MAX3232/MAX3237/MAX3241 Datasheet 16 p
- Maxim MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E Datasheet 26 p
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What does the AutoShutdown Plus feature do?
AutoShutdown Plus puts the transceiver into a low‑power shutdown mode when the RS‑232 cable is disconnected or all inputs are idle for more than 30 seconds, and it wakes the device when a valid transition is detected.
From: Maxim MAX3224/MAX3225/MAX3226/MAX3227/MAX3244/MAX3245 RS-232 Transceiver Datasheet
What is the maximum data rate for the MAX3224 device?
The MAX3224 supports a maximum data rate of 250 kbps.
From: Maxim MAX3224/MAX3225/MAX3226/MAX3227/MAX3244/MAX3245 RS-232 Transceiver Datasheet
What is the guaranteed data rate for the MAX3222?
The MAX3222 is guaranteed to run at a data rate of 120 kbps.
How many receivers does the MAX3222 have?
The MAX3222 has two receivers and two drivers.
What is the supply current when the device is in shutdown mode?
The device draws only 1 µA in shutdown mode thanks to the AutoShutdown feature.
From: Maxim MAX3221E/MAX3223E/MAX3243E RS-232 Transceiver Datasheet
What is the maximum data rate supported by the transceivers?
They support a maximum data rate of 250 kbps.
From: Maxim MAX3221E/MAX3223E/MAX3243E RS-232 Transceiver Datasheet