MAX3241:3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1µF External Capacitors

The MAX3222/MAX3232/MAX3237/MAX3241 transceivers have a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The devices require only four small 0.1µF external charge-pump capacitors. The MAX3222, MAX3232, and MAX3241 are guaranteed to run at data rates of 120kbps while maintaining RS-232 output levels. The MAX3237 is guaranteed to run at data rates of 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232 output levels. The MAX3222/MAX3232 have 2 receivers and 2 drivers. The MAX3222 features a 1µA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1µA supply current. The MAX3222 and MAX3232 are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively. The MAX3241 is a complete serial port (3 drivers/5 receivers) designed for notebook and subnotebook computers. The MAX3237 (5 drivers/3 receivers) is ideal for fast modem applications. Both these devices feature a shutdown mode in which all receivers can remain active while using only 1µA supply current. Receivers R1 (MAX3237/MAX3241) and R2 (MAX3241) have extra outputs in addition to their standard outputs. These extra outputs are always active, allowing external devices such as a modem to be monitored without forward biasing the protection diodes in circuitry that may have VCC completely removed. The MAX3222, MAX3237, and MAX3241 are available in space-saving TSSOP and SSOP packages.

Key Features
  • For Smaller Packaging:
    • MAX3228E/MAX3229E: +2.5V to +5.5V RS-232 Transceivers in UCSP™
  • For Integrated ESD Protection:
    • MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers
  • For Low-Voltage or Data Cable Applications:
    • MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins
MAX3222, MAX3232, MAX3237, MAX3241: Typical Operating Circuits
MAX3222, MAX3232, MAX3237, MAX3241: Typical Operating Circuits
Applications/Uses
  • Battery-Powered Equipment
  • Handheld Equipment
  • High-Speed Modems
  • Notebook, Subnotebook, and Palmtop Computers
  • Peripherals
  • Printers
DataSheet
titleDownload file
MAX3222-MAX3241 Data SheetMAX3222-MAX3241.pdf
Parametrics
Part NumberVSUPPLY
(V)
TxRxData Rate
(kbps)
ICC
(mA)
Internal Charge PumpExt. CapsCap. Value
(µF)
Rx Active in ShutdnPackage/PinsBudgetary
Price
mintypnomSee Notes
MAX32223.3
5
221200.3Yes40.12PDIP(N)/18
SOIC(W)/18
SSOP/20
TSSOP/20
$2.39 @1k
MAX3232221200.3-PDIP(N)/16
SOIC(N)/16
SOIC(W)/16
SSOP/16
TSSOP/16
$2.56 @1k
MAX32375310000.53SSOP/28$2.23 @1k
MAX3241351200.35SOIC(W)/28
SSOP/28
TSSOP/28
$2.23 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3241CAINo Longer AvailableMAX3241CAI+SSOP,;28 pin;81.6 mm²0°C to +70°CSee data sheet
MAX3241CAI+ActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3241CAI+TActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3241CAI-TNo Longer AvailableMAX3241CAI+TSSOP,;28 pin;81.6 mm²0°C to +70°CSee data sheet
MAX3241CUINo Longer AvailableMAX3241CUI+TSSOP,;28 pin;64.7 mm²0°C to +70°CNo
MAX3241CUI+ActiveTSSOP,;28 pin;64.7 mm²0°C to +70°CLead Free
MAX3241CUI+TActiveTSSOP,;28 pin;64.7 mm²0°C to +70°CLead Free
MAX3241CUI-TNo Longer AvailableMAX3241CUI+TTSSOP;28 pin0°C to +70°CSee data sheet
MAX3241CWINo Longer AvailableMAX3241CWI+SOIC(W),;28 pin;192.8 mm²0°C to +70°CNo
MAX3241CWI+ActiveSOIC(W),;28 pin;192.8 mm²0°C to +70°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3241CWI+TActiveSOIC(W),;28 pin;192.8 mm²0°C to +70°CLead Free
MAX3241CWI-TNo Longer AvailableMAX3241CWI+TW.SO;28 pin0°C to +70°CSee data sheet
MAX3241EAINo Longer AvailableMAX3241EAI+SSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
MAX3241EAI+ActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3241EAI+TActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3241EAI-TNo Longer AvailableMAX3241EAI+TSSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
MAX3241EUINo Longer AvailableMAX3241EUI+TSSOP,;28 pin;64.7 mm²-40°C to +85°CNo
MAX3241EUI+ActiveTSSOP,;28 pin;64.7 mm²-40°C to +85°CLead Free
MAX3241EUI+TActiveTSSOP,;28 pin;64.7 mm²-40°C to +85°CLead Free
MAX3241EUI-TNo Longer AvailableMAX3241EUI+TTSSOP,;28 pin;64.7 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3241EWINo Longer AvailableMAX3241EWI+SOIC(W),;28 pin;192.8 mm²-40°C to +85°CNo
MAX3241EWI+ActiveSOIC(W),;28 pin;192.8 mm²-40°C to +85°CLead Free
MAX3241EWI+TActiveSOIC(W),;28 pin;192.8 mm²-40°C to +85°CLead Free
MAX3241EWI-TNo Longer AvailableMAX3241EWI+TW.SO;28 pin-40°C to +85°CSee data sheet
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