전자부품 데이터시트 검색엔진 |
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SN74VMEH22501A-EP 데이터시트(PDF) 9 Page - Texas Instruments |
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SN74VMEH22501A-EP 데이터시트(HTML) 9 Page - Texas Instruments |
9 / 27 page SN74VMEH22501AEP 8BIT UNIVERSAL BUS TRANSCEIVER AND TWO 1BIT BUS TRANSCEIVERS WITH SPLIT LVTTL PORT, FEEDBACK PATH, AND 3STATE OUTPUTS SCES625 − FEBRUARY 2005 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating conditions for UBT transceiver (unless otherwise noted) (see Figures 1 and 2) MIN MAX UNIT fclock Clock frequency 120 MHz tw Pulse duration LE high 2.5 ns tw Pulse duration CLK high or low 3 ns 3A before CLK ↑ Data high 2.1 3A before CLK ↑ Data low 2.2 3A before LE ↓ CLK high 2 tsu Setup time 3A before LE ↓ CLK low 2 ns tsu Setup time 3B before CLK ↑ Data high 2.5 ns 3B before CLK ↑ Data low 2.7 3B before LE ↓ CLK high 2 3B before LE ↓ CLK low 2 3A after CLK ↑ Data high 0 3A after CLK ↑ Data low 0 3A after LE ↓ CLK high 1 th Hold time 3A after LE ↓ CLK low 1 ns th Hold time 3B after CLK ↑ Data high 0 ns 3B after CLK ↑ Data low 0 3B after LE ↓ CLK high 1 3B after LE ↓ CLK low 1 switching characteristics over recommended operating conditions for bus transceiver function (unless otherwise noted) (see Figures 1 and 2) PARAMETER FROM (INPUT) TO (OUTPUT) MIN TYP MAX UNIT tPLH 1A or 2A 1B or 2B 4.5 9.2 ns tPHL 1A or 2A 1B or 2B 4.2 7.8 ns tPLH 1A or 2A 1Y or 2Y 6.2 14.5 ns tPHL 1A or 2A 1Y or 2Y 6.1 13 ns tPZH OEAB 1B or 2B 3.6 8.1 ns tPZL OEAB 1B or 2B 3.4 7.8 ns tPHZ OEAB 1B or 2B 3.3 9.7 ns tPLZ OEAB 1B or 2B 1.8 4.8 ns tr Transition time, B port (10%−90%) 4.3 ns tf Transition time, B port (90%−10%) 4.3 ns tPLH 1B of 2B 1Y or 2Y 1.6 5.6 ns tPHL 1B of 2B 1Y or 2Y 1.6 5.6 ns tPZH OEBY 1Y or 2Y 1.2 5.6 ns tPZL OEBY 1Y or 2Y 1.8 4.9 ns tPHZ OEBY 1Y or 2Y 0.9 5.4 ns tPLZ OEBY 1Y or 2Y 1.4 4.5 ns |
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