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Overview
Features and Benefits
- Operates with 3.3 V Supply
- Interoperable with 5 V Logic
- EIA RS-422 and RS-485 Compliant over Full CM Range
- Data Rate: 250 kbps
- Half Duplex Transceiver
- Reduced Slew Rates for Low EMI
- 2 nA Supply Current in Shutdown Mode
- Up to 256 Transceivers on a Bus
- −7 V to +12 V Bus Common-mode Range
- Specified over −40°C to +85°C Temperature Range
- 8 ns Skew
- Available in 8-lead SOIC
Product Details
The ADM3493 is a low power, differential line transceiver designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes it ideal for power-sensitive applications. The ADM3493 is suitable for communication on multipoint bus transmission lines.The device contains one driver and one receiver. Designed for half-duplex communication, the ADM3493 features a slew rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250 kbps.
The receiver input impedance is 96 kΩ, allowing up to 256 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. If a significant temperature increase is detected in the internal driver circuitry during fault conditions then the thermal shutdown circuit forces the driver output into a high impedance state. The receiver contains a fail-safe feature that results in a logic high output state, if the inputs are unconnected (floating).
The ADM3493 is fully specified over the commercial and industrial temperature ranges and is available in an 8-lead SOIC.
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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