MAX221：+5V, 1µA, Single RS-232 Transceiver with AutoShutdown
Industry's Smallest, Low-Power Single RS-232 Transceiver
The MAX221 is a +5V-powered, single transmit/receive RS-232 and V.28 communications interface with automatic shutdown/wake-up features and high data rate capabilities. The MAX221 achieves a low 1µA supply current with Maxim's revolutionary AutoShutdown™ feature. AutoShutdown saves 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 transmitter of the connected peripheral is off. The MAX221 wakes up and drives the active-low INVALID pin high when an active RS-232 cable is connected, signaling the host that a peripheral is connected to the communications port. The MAX221 is available in a 16-pin SSOP package as well as a 16-pin TSSOP that uses 50% less board space than a 16-pin SO. For an equivalent RS-232 transceiver with enhanced ±15kV ESD protection, refer to the MAX221E data sheet.
Key Features
| MAX221: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX221 Data Sheet | MAX221.pdf |
Parametrics
| Part Number | VSUPPLY (V) | Tx | Rx | Data Rate (kbps) | ICC (mA) | Internal Charge Pump | Ext. Caps | Cap. Value (µF) | Rx Active in Shutdn | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|
| min | typ | nom | See Notes | ||||||||
| MAX221 | 5 | 1 | 1 | 250 | 5 | Yes | 4 | 0.1 | 1 | SSOP/16 TSSOP/16 | $1.56 @1k |
Quality and Environmental Data
Related Products
- MAX221E：±15kV ESD-Protected, +5V, 1µA, Single RS-232 Transceiver with AutoShutdown
- MAX3226：1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
- MAX3227：1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
- MAX3226E：±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
- MAX3221E：±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown
- MAX3227E：±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus
- MAX3221：+3V to +5.5V RS-232 Transceivers with AutoShutdown
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX221CAE | No Longer Available | MAX221CAE+ | SSOP,;16 pin;50 mm² | 0°C to +70°C | No |
| MAX221CAE+ | Active | SSOP,;16 pin;50 mm² | 0°C to +70°C | Lead Free | |
| MAX221CAE+T | Active | SSOP,;16 pin;50 mm² | 0°C to +70°C | Lead Free | |
| MAX221CAE-T | No Longer Available | MAX221CAE+T | SSOP,;16 pin;50 mm² | 0°C to +70°C | No |
| MAX221CUE | No Longer Available | MAX221CUE+ | TSSOP,;16 pin;33.4 mm² | 0°C to +70°C | No |
| MAX221CUE+ | Active | TSSOP,;16 pin;33.4 mm² | 0°C to +70°C | Lead Free | |
| MAX221CUE+T | Active | TSSOP,;16 pin;33.4 mm² | 0°C to +70°C | Lead Free | |
| MAX221CUE-T | No Longer Available | MAX221CUE+T | TSSOP,;16 pin;33.4 mm² | 0°C to +70°C | No |
| MAX221EAE | No Longer Available | MAX221EAE+ | SSOP,;16 pin;50 mm² | -40°C to +85°C | No |
| MAX221EAE+ | Active | SSOP,;16 pin;50 mm² | -40°C to +85°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX221EAE+T | Active | SSOP,;16 pin;50 mm² | -40°C to +85°C | Lead Free | |
| MAX221EAE-T | No Longer Available | MAX221EAE+T | SSOP;16 pin | -40°C to +85°C | See data sheet |
| MAX221EUE | No Longer Available | MAX221EUE+ | TSSOP,;16 pin;33.4 mm² | -40°C to +85°C | No |
| MAX221EUE+ | Active | TSSOP,;16 pin;33.4 mm² | -40°C to +85°C | Lead Free | |
| MAX221EUE+T | Active | TSSOP,;16 pin;33.4 mm² | -40°C to +85°C | Lead Free | |
| MAX221EUE-T | No Longer Available | MAX221EUE+T | TSSOP,;16 pin;33.4 mm² | -40°C to +85°C | No |
- MAX221.pdf MAX221
- MAX221.pdf MAX221
- MAX221.pdf MAX221
- Determining Clock Accuracy Requirements for UART Communications MAX3206E
- MAX221.pdf MAX221
- MAX221.pdf MAX221
