看一下DATASHEET不就很清楚了:
IOH(max) = ?1.5 mA, VCC = 3 V, See Note 14 VOH = VCC?0.25 to VCC
IOH(max) = ?6 mA, VCC = 3 V, See Note 15 VOH = VCC?0.6 to VCC
IOL(max) = 1.5 mA, VCC = 3 V, See Note 14 VOL = VSS to VSS+0.25
IOL(max) = 6 mA, VCC = 3 V, See Note 15 VOL = VSS to VSS+0.6
NOTES: 14. The maximum total current, IOH(max) and IOL(max), for all outputs combined, should not exceed ±12 mA to satisfy the maximum
specified voltage drop.
15. The maximum total current, IOH(max) and IOL(max), for all outputs combined, should not exceed ±24 mA to satisfy the maximum
specified voltage drop.
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发表于 2003-5-14 17:09
看一下DATASHEET不就很清楚了:
IOH(max) = ?1.5 mA, VCC = 3 V, See Note 14 VOH = VCC?0.25 to VCC
IOH(max) = ?6 mA, VCC = 3 V, See Note 15 VOH = VCC?0.6 to VCC
IOL(max) = 1.5 mA, VCC = 3 V, See Note 14 VOL = VSS to VSS+0.25
IOL(max) = 6 mA, VCC = 3 V, See Note 15 VOL = VSS to VSS+0.6
NOTES: 14. The maximum total current, IOH(max) and IOL(max), for all outputs combined, should not exceed ±12 mA to satisfy the maximum
specified voltage drop.
15. The maximum total current, IOH(max) and IOL(max), for all outputs combined, should not exceed ±24 mA to satisfy the maximum
specified voltage drop.