ST491A STMicroelectronics, ST491A Datasheet
ST491A
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ST491A Summary of contents
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... CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD PROTECTION DESCRIPTION The ST491A 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 ST491A draws 5mA (typ.) of supply current when unloaded and operates from a single 5V supply ...
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... ST491A PIN CONFIGURATION PIN DESCRIPTION PlN N° SYMBOL GND 7 GND TRUTH TABLE (DRIVER) INPUT Don’t Care; Z=High Impedance 2/12 NAME AND FUNCTION Not Connected Receiver Output. ...
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... 100 (RS-422) (Figure 100 (Figure (Figure (Figure =-7V to 12V =-7V to 12V O ST491A Value Unit -7.5 to 12.5 V -7.5 to 12 25°C) A Min. Typ. Max. Unit 1 ...
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... ST491A RECEIVER ELECTRICAL CHARACTERISTICS V = 4.5V to 5.5V -40 to 85°C, unless otherwise specified. Typical values are referred Symbol Parameter I Input Current ( Receiver Differential TH Threshold Voltage V Receiver Input Hysteresis TH V Receiver Output High OH Voltage V Receiver Output Low OL Voltage R Receiver Input Resistance ...
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... TEST CIRCUITS AND TYPICAL CHARACTERISTICS Figure 1 : Driver DC Test Load Figure 2 : Receiver Timing Test Load Figure 3 : Driver/Receiver Timing Test Circuit ST491A 5/12 ...
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... ST491A Figure 4 : Driver Timing Test Load Figure 5 : Driver Propagation Delay 6/12 ...
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... Figure 6 : Receiver Propagation Delay Figure 7 : Receiver Output Current vs Output Voltage (Output Low) Figure 8 : Receiver Output Current vs Output Voltage (Output High) Figure 9 : Driver Diff. Output Voltage vs Common Mode Voltage (Diff. Output Low) Figure 10 : Driver Diff. Output Voltage vs Common Mode Voltage (Diff. Output High) ST491A 7/12 ...
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... ST491A Figure 11 : Driver Short Circuit Current vs Line Voltage (Output High) Figure 12 : Driver Short Circuit Current vs. Line Voltage (Output Low) 8/12 Figure 13 : Receiver Input Current vs Input Voltage ...
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... Plastic DIP-14 MECHANICAL DATA mm. DIM. MIN. a1 0. 15. 1.27 TYP MAX. MIN. 0.020 1.65 0.055 0.5 0.25 20 8.5 2.54 7.1 5.1 3.3 2.54 0.050 ST491A inch TYP. MAX. 0.065 0.020 0.010 0.787 0.335 0.100 0.600 0.280 0.201 0.130 0.100 P001A 9/12 ...
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... ST491A DIM. MIN 0 0. 8. 3.8 G 4 10/12 SO-14 MECHANICAL DATA mm. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.5 45˚ (typ.) 8.75 6.2 1.27 7.62 4.0 5.3 1.27 0.68 ˚ (max.) 8 inch MIN. TYP. MAX. 0.068 0.003 0.007 0.064 0.013 0.018 0.007 0.010 0.019 0.336 0.344 0.228 0.244 0.050 0.300 0.149 0.157 0.181 ...
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... Tape & Reel SO-14 MECHANICAL DATA mm. DIM. MIN 12 2.1 Po 3.9 P 7.9 TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 22.4 6.6 0.252 9.2 0.354 2.3 0.082 4.1 0.153 8.1 0.311 ST491A inch TYP. MAX. 12.992 0.519 0.882 0.260 0.362 0.090 0.161 0.319 11/12 ...
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... ST491A Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...