仅对英特尔可见 — GUID: mcn1441694995986
Ixiasoft
单端I/O标准规范
I/O标准 | VCCIO (V) | VIL(V) | VIH(V) | VOL (V) | VOH (V) | IOL (mA) | IOH 34 (mA) | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
Min | Typ | Max | Min | Max | Min | Max | Max | Min | |||
3.0-V LVTTL | 2.85 | 3 | 3.15 | –0.3 | 0.8 | 1.7 | 3.6 | 0.4 | 2.4 | 2 | –2 |
3.0-V LVCMOS | 2.85 | 3 | 3.15 | –0.3 | 0.8 | 1.7 | 3.6 | 0.2 | VCCIO – 0.2 | 0.1 | –0.1 |
2.5 V | 2.375 | 2.5 | 2.625 | –0.3 | 0.7 | 1.7 | 3.3 | 0.4 | 2 | 1 | –1 |
1.8 V | 1.71 | 1.8 | 1.89 | -0.3 | 0.35 × VCCIO | 0.65 × VCCIO | VCCIO + 0.3 | 0.45 | VCCIO – 0.45 | 2 | –2 |
1.5 V | 1.425 | 1.5 | 1.575 | –0.3 | 0.35 × VCCIO | 0.65 × VCCIO | VCCIO + 0.3 | 0.25 × VCCIO | 0.75 × VCCIO | 2 | –2 |
1.2 V | 1.14 | 1.2 | 1.26 | –0.3 | 0.35 × VCCIO | 0.65 × VCCIO | VCCIO + 0.3 | 0.25 × VCCIO | 0.75 × VCCIO | 2 | –2 |
Schmitt Trigger Input | 1.71 | 1.8 | 1.89 | — | 0.35 × VCCIO | 0.65 × VCCIO | — | — | — | — | — |
34 要满足IOL和IOH规范,您必须相应地设置电流强度。例如,要满足1.8- V LVCMOS规范(4 mA),您应该将电流强度设为4 mA。设成较低的电流强度可能不会满足数据表中的IOL和IOH规范。