MAX3223 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver | TI.com

MAX3223 (ACTIVE)

3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver

3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver - MAX3223
Datasheet
 

Recommended alternative parts

  • TRS3223E  -  The device has the SAME FUNCTIONALITY/PINOUT as the compared device but includes enhanced IEC61000-4-2 ESD Protection.
  • MAX3223E  -  TI recommends the MAX3223E in new designs. The MAX3223E is an improved direct drop-in replacement for the MAX3223

Description

The MAX3223 consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD 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 an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF\ is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF\ is set low and EN\ is high, both drivers and receivers are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes auto-powerdown to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF\ are high. With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to any receiver input. The INVALID\ output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID\ is high (valid data) if any receiver input voltage is greater than 2.7 V or less than –2.7 V or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID\ is low (invalid data) if the receiver input voltage is between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 4 for receiver input levels.

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 VCC Supply
  • Operates up to 250 kbit/s
  • Two Drivers and Two Receivers
  • Low Standby Current ...1 µA Typical
  • External Capacitors ...4 × 0.1 µF
  • Accepts 5-V Logic Input With 3.3-V Supply
  • Alternative High-Speed Pin-Compatible Device (1 Mbit/s)
    • SNx5C3223
  • Applications
    • Battery-Powered Systems, PDAs, Notebooks, Laptops, Palmtop PCs, and Hand-Held Equipment

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Parametrics Compare all products in RS-232

 
Drivers Per Package
Receivers Per Package
Logic Voltage (Min) (V)
Data Rate (Max) (kbps)
Main Supply Voltage (Nom) (V)
Features
ESD HBM (kV)
Rating
Operating Temperature Range (C)
Package Group
Pin/Package
MAX3223 MAX3227 TRS3221 TRS3227E
2     1     1     1    
2     1     1     1    
3.3     3.3     3.3     3.3    
250     1000     250     1000    
3.3
5    
3.3
5    
3.3
5    
3.3
5    
Auto-Powerdown     Auto-Powerdown Plus     Auto-Powerdown     Auto-Powerdown Plus    
15     15     15     15    
Catalog     Catalog     Catalog     Catalog    
-40 to 85
0 to 70    
-40 to 85
0 to 70    
-40 to 85
0 to 70    
0 to 70
-40 to 85    
SOIC | 20
SSOP | 20
TSSOP | 20    
SSOP | 16     SSOP | 16
TSSOP | 16    
SSOP | 16    
20SOIC
20SSOP
20TSSOP    
16SSOP     16SSOP
16TSSOP    
16SSOP