ST490A STMicroelectronics, ST490A Datasheet
ST490A
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ST490A Summary of contents
Page 1
... CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD PROTECTION DESCRIPTION The ST490A is a low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST490A draws 5mA (typ.) of supply current when unloaded or fully loaded with disabled drivers ...
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... ST490A PIN CONFIGURATION PIN DESCRIPTION PlN N° SYMBOL GND TRUTH TABLE (DRIVER) INPUT OUTPUTS Don’t Care; Z=High Impedance ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage CC V Driver Input Voltage ...
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... (RS-422) (Figure 100 (RS-422) (Figure 100 (Figure (Figure (Figure =-7V to 12V =-7V to 12V O ST490A = 25°C) A Min. Typ. Max. Unit 1.8 pF 1 25°C) a Min. Typ. Max. Unit 1.5 2 ...
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... ST490A RECEIVER ELECTRICAL CHARACTERISTICS V = 4.5V to 5.5V -40 to 85°C, unless otherwise specified. Typical values are referred Symbol Parameter I Logic Input Current IN1 I Input Current (A, B) IN2 V Receiver Differential TH Threshold Voltage V Receiver Input Hysteresis TH V Receiver Output High OH Voltage V Receiver Output Low ...
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... TEST CIRCUITS AND TYPICAL CHARACTERISTICS Figure 1 : Driver DC Test Load Figure 2 : Driver/Receiver Timing Test Circuit ST490A 5/11 ...
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... ST490A Figure 3 : Driver Propagation Delay Figure 4 : Receiver Propagation Delay 6/11 ...
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... Figure 7 : Driver Diff. Output Voltage vs Common Mode Voltage (Diff. Output Low) Figure 8 : Driver Diff. Output Voltage vs Common Mode Voltage (Diff. Output High) Figure 9 : Driver Short Circuit Current vs Line Voltage (Output High) Figure 10 : Driver Short Circuit Current vs. Line Voltage (Output Low) ST490A 7/11 ...
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... ST490A Figure 11 : Receiver Input Current vs Input Voltage 8/11 ...
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... Plastic DIP-8 MECHANICAL DATA mm. DIM. MIN 0.7 B 1. 0.44 TYP MAX. MIN. 3.3 0.028 1.65 0.055 1.04 0.036 0.5 0.5 0.015 9.8 8.8 2.54 7.62 7.62 7.1 4.8 3.3 1.6 0.017 ST490A inch TYP. MAX. 0.130 0.065 0.041 0.020 0.020 0.386 0.346 0.100 0.300 0.300 0.280 0.189 0.130 0.063 P001F 9/11 ...
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... ST490A DIM. MIN 0 0.65 b 0.35 b1 0. 4 3 10/11 SO-8 MECHANICAL DATA mm. TYP MAX. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45˚ (typ.) 5.0 6.2 1.27 3.81 4.0 1.27 0.6 ˚ (max.) 8 inch MIN. TYP. MAX. 0.068 0.003 0.009 0.064 0.025 0.033 0.013 0.018 0.007 0.010 0.010 0.019 0.189 0.196 0.228 0.244 0.050 0.150 ...
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... The ST logo is a registered trademark of STMicroelectronics © 2002 STMicroelectronics - Printed in Italy - All Rights Reserved Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. STMicroelectronics GROUP OF COMPANIES © http://www.st.com ST490A 11/11 ...