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ST72682 数据表(PDF) 27 Page - STMicroelectronics |
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ST72682 数据表(HTML) 27 Page - STMicroelectronics |
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27 / 36 page ![]() ST72682 Electrical characteristics 27/36 7.7.2 Output driving current Subject to general operating conditions for VDD33, fOSC, and TA unless otherwise specified. Table 21. Output driving current Symbol Parameter Conditions Min Max Unit VOL (1) 1. The IIO current sunk must always respect the absolute maximum rating specified in Section Table 9. and the sum of IIO (I/O ports and control pins) must not exceed IVSS. Output low level voltage for a D2 I/O pin when 8 pins are sunk at same time (see Figure ) IIO=2mA 300 mV Output low level voltage for a D4 I/O pin when 8 pins are sunk at same time (see Figure 12) IIO=4mA 400 Output low level voltage for a D8 I/O pin when 8 pins are sunk at same time (see Figure 13) IIO=8mA 500 VDD33- VOH (2) 2. The IIO current sourced must always respect the absolute maximum rating specified in Section Table 9. and the sum of IIO (I/O ports and control pins) must not exceed IVDD33. True open drain I/O pins does not have VOH. Output high level voltage for a D2 I/O pin when 8 pins are sourced at same time (see and Figure 14) IIO=2mA 600 mV Output high level voltage for a D4 I/O pin when 8 pins are sourced at same time (see Figure 15) IIO=4mA 600 Output high level voltage for a D8 I/O pin when 8 pins are sourced at same time (see Figure 16) IIO=8mA 600 Figure 11. Typical VOL at VDD33=3.3 V (I/O D2) Figure 12. Typical VOL at VDD33=3.3 V (I/O D4) V O L I/ Os D 2 at V D D =3 .3 V 0 50 100 150 01 2 3 4 IO L (m A ) VOL I/ Os D4 a t VDD=3.3 V 0 50 100 150 0246 IOL ( mA ) |
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