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74LVX257TTR Datasheet(PDF) 4 Page - STMicroelectronics |
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74LVX257TTR Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 10 page 74LVX257 4/10 DYNAMIC SWITCHING CHARACTERISTICS 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns) 1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch- ing in the same direction, either HIGH or LOW 2) Parameter guaranteed by design (*) Voltage range is 3.3V ± 0.3V Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. VOLP Dynamic Low Voltage Quiet Output (note 1, 2) 3.3 CL = 50 pF 0.3 0.5 V VOLV -0.5 -0.3 VIHD Dynamic High Voltage Input (note 1, 3) 3.3 2.0 VILD Dynamic Low Voltage Input (note 1, 3) 3.3 0.8 Symbol Parameter Test Condition Value Unit VCC (V) CL (pF) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. tPLH tPHL Propagation Delay Time A, B, to Y 2.7 15 7.0 13.0 1.0 15.4 1.0 16.4 ns 2.7 50 9.5 18.0 1.0 20.3 1.0 21.3 3.3(*) 15 5.8 9.3 1.0 11.0 1.0 12.0 3.3(*) 50 8.3 12.8 1.0 14.5 1.0 15.5 tPLH tPHL Propagation Delay Time SELECT to Y 2.7 15 8.5 15.4 1.0 18.2 1.0 20.0 ns 2.7 50 10.5 20.3 1.0 23.1 1.0 24.5 3.3(*) 15 7.0 11.0 1.0 13.0 1.0 14.0 3.3(*) 50 9.5 14.5 1.0 16.5 1.0 18.0 tPZL tPZH Output Enable Time 2.7 15 8.0 14.7 1.0 17.5 1.0 18.5 ns 2.7 50 10.5 19.6 1.0 22.4 1.0 24.0 3.3(*) 15 6.7 10.5 1.0 12.5 1.0 13.5 3.3(*) 50 9.2 14.0 1.0 16.0 1.0 17.0 tPLZ tPHZ Output Disable Time 2.7 50 9.5 16.8 1.0 18.9 1.0 20.0 ns 3.3(*) 50 8.6 12.0 1.0 13.5 1.0 15.0 tOSLH tOSHL Output to Output Skew Time (note 1,2) 2.7 50 0.5 1.0 1.5 1.5 ns 3.3(*) 50 0.5 1.0 1.5 1.5 |
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