MAX3243E:±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown

The MAX3221E/MAX3223E/MAX3243E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model. The MAX3221E/MAX3223E/MAX3243E achieve a 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. They save power without changes to the existing BIOS or operating system by entering low-power shutdown mode when the RS-232 cable is disconnected, or when the transmitters of the connected peripherals are off. The transceivers have a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply. Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels. The MAX3221E contains just one driver and one receiver, making it the smallest single-supply RS-232 transceiver. The MAX3223E has two drivers and two receivers. The MAX3243E is a complete 3-driver/5-receiver serial port ideal for notebook or subnotebook computers. It also includes two noninverting receiver outputs that are always active, allowing external devices to be monitored without forward biasing the protection diodes in circuitry that may be powered down. The MAX3221E, MAX3223E, and MAX3243E are available in space-saving TQFN, SSOP, and TSSOP packages.

Key Features
  • For Space-Constrained Applications:
    • MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V RS-232 Transceivers in UCSP™
    • MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: ±15kV ESD-Protected Down to 10nA, +3.0V to +5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in a UCSP Package)
  • For 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
Applications/Uses
  • Battery-Powered Equipment
  • Cell Phones
  • Handheld Equipment
  • Notebook, Subnotebook, and Palmtop Computers
  • Peripherals
  • Printers
DataSheet
titleDownload file
MAX3221E-MAX3243E Data SheetMAX3221E-MAX3243E.pdf
Parametrics
Part NumberVSUPPLY
(V)
TxRxData Rate
(kbps)
ICC
(mA)
Internal Charge PumpExt. CapsCap. Value
(µF)
ESD Protect.
(±kV)
Rx Active in ShutdnPackage/PinsBudgetary
Price
mintypnomSee Notes
MAX3221E3.3
5
112500.3Yes40.1151SSOP/16
TQFN/16
TSSOP/16
$1.87 @1k
MAX3223E222PDIP(N)/20
SSOP/20
TQFN/20
TSSOP/20
$2.95 @1k
MAX3243E351SOIC(W)/28
SSOP/28
TQFN/28
TQFN/32
TSSOP/28
$2.27 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3243ECAINo Longer AvailableMAX3243ECAI+SSOP,;28 pin;81.6 mm²0°C to +70°CSee data sheet
MAX3243ECAI+ActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3243ECAI+G1ZActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3243ECAI+TActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3243ECAI-TNo Longer AvailableMAX3243ECAI+TSSOP,;28 pin;81.6 mm²0°C to +70°CSee data sheet
MAX3243ECTJNo Longer AvailableTQFN,;32 pin;50.4 mm²0°C to +70°CNo
MAX3243ECTJ-TNo Longer AvailableQFN;0°C to +70°CSee data sheet
MAX3243ECUINo Longer AvailableMAX3243ECUI+TSSOP,;28 pin;64.7 mm²0°C to +70°CNo
MAX3243ECUI+ActiveTSSOP,;28 pin;64.7 mm²0°C to +70°CLead Free
MAX3243ECUI+TActiveTSSOP,;28 pin;64.7 mm²0°C to +70°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3243ECUI-TNo Longer AvailableMAX3243ECUI+TTSSOP;28 pin0°C to +70°CSee data sheet
MAX3243ECWINo Longer AvailableMAX3243ECWI+SOIC(W),;28 pin;192.8 mm²0°C to +70°CNo
MAX3243ECWI+ActiveSOIC(W),;28 pin;192.8 mm²0°C to +70°CLead Free
MAX3243ECWI-TNo Longer AvailableMAX3243ECWI+TW.SO;28 pin0°C to +70°CSee data sheet
MAX3243EEAINo Longer AvailableMAX3243EEAI+SSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
MAX3243EEAI+ActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3243EEAI+G071No Longer AvailableSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3243EEAI+TActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3243EEAI-G071No Longer AvailableSSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
MAX3243EEAI-TNo Longer AvailableMAX3243EEAI+TSSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3243EEAI-TG071No Longer AvailableMAX3243EEAI+TG071SSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
MAX3243EETI+ActiveTQFN,;28 pin;16.8 mm²-40°C to +85°CLead Free
MAX3243EETI+TActiveTQFN,;28 pin;16.8 mm²-40°C to +85°CLead Free
MAX3243EETJNo Longer AvailableMAX3243EETJ+TQFN,;32 pin;50.4 mm²-40°C to +85°CNo
MAX3243EETJ+ActiveTQFN,;32 pin;50.4 mm²-40°C to +85°CLead Free
MAX3243EETJ+TActiveTQFN,;32 pin;50.4 mm²-40°C to +85°CLead Free
MAX3243EETJ-TNo Longer AvailableMAX3243EETJ+TQFN;32 pin-40°C to +85°CSee data sheet
MAX3243EEUINo Longer AvailableMAX3243EEUI+TSSOP,;28 pin;64.7 mm²-40°C to +85°CNo
MAX3243EEUI+ActiveTSSOP,;28 pin;64.7 mm²-40°C to +85°CLead Free
MAX3243EEUI+TActiveTSSOP,;28 pin;64.7 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3243EEUI-TNo Longer AvailableMAX3243EEUI+TTSSOP;28 pin-40°C to +85°CSee data sheet
MAX3243EEWINo Longer AvailableMAX3243EEWI+SOIC(W),;28 pin;192.8 mm²-40°C to +85°CNo
MAX3243EEWI+ActiveSOIC(W),;28 pin;192.8 mm²-40°C to +85°CLead Free
MAX3243EEWI+TActiveSOIC(W),;28 pin;192.8 mm²-40°C to +85°CLead Free
MAX3243EEWI-TNo Longer AvailableMAX3243EEWI+TW.SO;28 pin-40°C to +85°CSee data sheet
MAX3221E-MAX3243E.pdf MAX3243E
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