MAX253EUA+

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Analog Devices Inc./Maxim Integrated

1W PRIMARY-SIDE TRANSFORMER H-BRIDGE DRIVER FOR ISOLATED SUPPLIES

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MAX253EUA+

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Analog Devices Inc./Maxim Integrated

1W PRIMARY-SIDE TRANSFORMER H-BRIDGE DRIVER FOR ISOLATED SUPPLIES

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Description Specifications Series Pricing CAD Documents

Description

General part information

MAX253 Series

The MAX253 monolithic oscillator/power-driver is specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The device 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 a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches.The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.ApplicationsBridge Ground DifferentialsHigh Noise-Immunity Communications InterfaceIsolated and/or High-Voltage Power SuppliesIsolated RS-485/RS-232 Power SupplyMedical EquipmentProcess ControlTransformer Driver

Technical Specifications

Parameters and characteristics for this part

Specification	MAX253EUA+

Applications	Transformer Driver
Current - Supply	450 µA
Mounting Type	Surface Mount
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Package Length	0.118 in
Package Name	8-uMAX/uSOP, 8-TSSOP, 8-MSOP
Package Width	3 mm
Voltage - Supply	5 VDC, 3.3 V
Voltage - Supply	5V, 3.3V

MAX253 Series

1W Primary-Side Transformer H-Bridge Driver for Isolated Supplies

Part	Applications	Current - Supply	Mounting Type	Package Length	Package Name	Package Width	Voltage - Supply	Voltage - Supply	Operating Temperature (Max)	Operating Temperature (Min)	Noise Figure	Number of Mixers	Gain	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	RF Type	Package / Case
Analog Devices Inc./Maxim Integrated MAX253MJA	Transformer Driver	450 µA	Through Hole	0.3 in	8-CDIP 8-CERDIP	7.62 mm	3.3 V 5 VDC	3.3V 5V	125 °C	-55 °C
Analog Devices Inc./Maxim Integrated MAX253CPA	Transformer Driver	450 µA	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	3.3 V 5 VDC	3.3V 5V	70 °C	0 °C
Analog Devices Inc./Maxim Integrated MAX253EPA+	Transformer Driver	450 µA	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	3.3 V 5 VDC	3.3V 5V	85 °C	-40 °C
Analog Devices Inc./Maxim Integrated MAX253CUA-T
Analog Devices Inc./Maxim Integrated MAX253CSA+T	Transformer Driver	450 µA	Surface Mount	0.154 in	8-SOIC	3.9 mm	3.3 V 5 VDC	3.3V 5V	70 °C	0 °C
Analog Devices Inc./Maxim Integrated MAX253ESA+T	Transformer Driver	450 µA	Surface Mount	0.154 in	8-SOIC	3.9 mm	3.3 V 5 VDC	3.3V 5V	85 °C	-40 °C
Analog Devices Inc./Maxim Integrated MAX253C/D
Analog Devices Inc./Maxim Integrated MAX2538ETI+		32 mA	Surface Mount	5 mm	28-TQFN	5 mm					9 dB	3	16 dB	3.3 V	2.7 V	Cellular GPS PCS	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated MAX253CUA+	Transformer Driver	450 µA	Surface Mount	0.118 in	8-TSSOP 8-MSOP 8-uMAX/uSOP	3 mm	3.3 V 5 VDC	3.3V 5V	70 °C	0 °C
Analog Devices Inc./Maxim Integrated MAX253MSA/PR+	Transformer Driver	450 µA	Surface Mount	0.154 in	8-SOIC	3.9 mm			125 °C	-55 °C				5.5 V	4.5 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Package Drawing - Micro-MAX, Thin Shrink Small-Outline

MAX253: 1W Primary-Side Transformer H-Bridge Driver for Isolated Supplies Data Sheet (Rev.3)

MAX253 Reliability Data