Rise Time
:
Fall Time
:
Mounting Style
: SMD/SMT
Product
: Half-Bridge Drivers
Package / Case
: SOIC-8
Packaging
: Tube
Type
: Non-Inverting
Maximum Operating Temperature
: + 85 C
Supply Voltage - Max
: 6 V
Supply Voltage - Min
: 2.5 V
Supply Current
: 0.45 mA
Maximum Power Dissipation
: 471 mW
DescriptionThe MAX253ESA+ is one member of the MAX253 series.The MAX253 is a monolithic oscillator/power-driver, specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. It drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W.The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving atoggle flip-flop to ensure 50% duty cycle to each of the switches.Internal delays are arranged to ensure break-beforemake action between the two switches.
Features of the MAX253ESA+ are:(1)power-supply transformer driver for isolated RS-485/RS-232 data-interface applications; (2)single +5V or +3.3V supply; (3)low-current shutdown mode: 0.4A; (4)pin-selectable frequency: 350kHz or 200kHz; (5)8-Pin DIP, SO, and MAX packages.
The absolute maximum ratings of the MAX253ESA+ can be summarized as:(1)supply voltage:-0.3V to +7V;(2)storage temperature range:-65 to +160;(3)operating temperature range:0 to +70;(4)lead temperature range (soldering 10 sec):300;(5)control input voltages (SD, FS):-0.3V to (VCC + 0.3V);(6)output switch voltage (D1, D2):12V.Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.The secondary winding may or may not be center tapped, depending on the rectifier topology used. The phasing of the secondary winding is not critical. In some applications, multiple secondaries might be required. Half-wave rectification could be used, but is discouraged because it normally adds a DC imbalance to the magnetic flux in the core, reducing the ET product.If the DC load is imbalanced, full-wave rectification is recommended, as shown in Figure 9b.
Parameters: | Technical/Catalog Information | MAX253ESA+ |
| Vendor | Maxim Integrated Products |
| Category | Integrated Circuits (ICs) |
| Number of Drivers/Receivers | 1/0 |
| Type | Driver |
| Voltage - Supply | 4.5 V ~ 5.5 V |
| Package / Case | 8-SOIC (3.9mm Width) |
| Packaging | Tube |
| Protocol | RS232, RS485 |
| Drawing Number | 175; 21-0041; SA; 8 |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | MAX253ESA+
MAX253ESA+
|
MAX253ESA+ Data Sheet
