MAX3245:1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus

The MAX3224–MAX3227/MAX3244/MAX3245 are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features and high data-rate capabilities. All devices achieve a 1µA supply current using Maxim's revolutionary AutoShutdown Plus™ feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiver input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system. The MAX3225/MAX3227/MAX3245 also feature MegaBaud™ operation, guaranteeing 1Mbps for highspeed applications such as communicating with ISDN modems. The MAX3224/MAX3226/MAX3244 guarantee 250kbps operation. The 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 charge pump requires only four small 0.1µF capacitors for operation from a 3.3V supply. The MAX3224-MAX3227 feature a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. All devices are available in a space-saving TSSOP and SSOP packages.

Key Features
  • For Smaller Packaging:
    • MAX3228/MAX3229: +2.5V to +5.5V RS-232 Transceivers in UCSP™
  • For Low-Voltage or Data Cable Applications:
    • MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins
  • 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 (MAX3246E Available in UCSP)
MAX3224, MAX3225, MAX3226, MAX3227, MAX3244, MAX3245: Typical Operating Circuits
MAX3224, MAX3225, MAX3226, MAX3227, MAX3244, MAX3245: Typical Operating Circuits
Applications/Uses
  • Battery-Powered Equipment
  • Cell Phones
  • Handheld Equipment
  • Notebook, Subnotebook, and Palmtop Computers
  • Peripherals
  • Printers
DataSheet
titleDownload file
MAX3224-MAX3245 Data SheetMAX3224-MAX3245.pdf
Parametrics
Part NumberVSUPPLY
(V)
TxRxData Rate
(kbps)
ICC
(mA)
Internal Charge PumpExt. CapsCap. Value
(µF)
Rx Active in ShutdnPackage/PinsBudgetary
Price
mintypnomSee Notes
MAX32243.3
5
222500.3Yes40.12SSOP/20
TQFN/20
TSSOP/20
$2.56 @1k
MAX32252210002PDIP(N)/20
SSOP/20
TQFN/20
TSSOP/20
$2.56 @1k
MAX3226112502SSOP/16$1.67 @1k
MAX32271110002SSOP/16$1.67 @1k
MAX3244352505SOIC(W)/28
SSOP/28
$1.83 @1k
MAX32453510005SOIC(W)/28
SSOP/28
$1.83 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3245CAINo Longer AvailableMAX3245CAI+SSOP,;28 pin;81.6 mm²0°C to +70°CSee data sheet
MAX3245CAI+ActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3245CAI+TActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3245CAI+TG1ZActiveSSOP,;28 pin;81.6 mm²0°C to +70°CLead Free
MAX3245CAI-TNo Longer AvailableMAX3245CAI+TSSOP,;28 pin;81.6 mm²0°C to +70°CSee data sheet
MAX3245CWINo Longer AvailableMAX3245CWI+SOIC(W),;28 pin;192.8 mm²0°C to +70°CNo
MAX3245CWI+ActiveSOIC(W),;28 pin;192.8 mm²0°C to +70°CLead Free
MAX3245CWI+TActiveSOIC(W),;28 pin;192.8 mm²0°C to +70°CLead Free
MAX3245CWI-TNo Longer AvailableMAX3245CWI+TW.SO;28 pin0°C to +70°CSee data sheet
MAX3245EAINo Longer AvailableMAX3245EAI+SSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3245EAI+ActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3245EAI+TActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX3245EAI-TNo Longer AvailableMAX3245EAI+TSSOP;28 pin-40°C to +85°CSee data sheet
MAX3245EWINo Longer AvailableSOIC(W),;28 pin;192.8 mm²-40°C to +85°CNo
MAX3245EWI-TNo Longer AvailableW.SO;28 pin-40°C to +85°CSee data sheet
MAX3224-MAX3245.pdf MAX3245
Determining Clock Accuracy Requirements for UART Communications MAX3206E
MAX3224-MAX3245.pdf MAX3245