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P4C198-25PM Datasheet(PDF) 8 Page - Pyramid Semiconductor Corporation |
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P4C198-25PM Datasheet(HTML) 8 Page - Pyramid Semiconductor Corporation |
8 / 13 page P4C198/198L, P4C198A/198AL Page 8 of 13 Document # SRAM113 REV A TRUTH TABLES P4C198/L P4C198A/L CE CE CE CE CE 1 CE CE CE CE CE 2 WE WE WE WE WE OE OE OE OE OE Mode Output H X X X Standby High Z X H X X Standby High Z L L H H Output Inhibit High Z L L H L READ D OUT L L L X WRITE D IN CE CE CE CE CE WE WE WE WE WE OE OE OE OE OE Mode Output H X X Standby High Z L H H Output Inhibit High Z L H L READ D OUT L L X WRITE D IN Input Pulse Levels GND to 3.0V Input Rise and Fall Times 3ns Input Timing Reference Level 1.5V Output Timing Reference Level 1.5V Output Load See Figures 1 and 2 * including scope and test fixture. Note: Because of the ultra-high speed of the P4C198/L and P4C198A/L, care must be taken when testing this device; an inadequate setup can cause a normal functioning part to be rejected as faulty. Long high-inductance leads that cause supply bounce must be avoided by bringing the V CC and ground planes directly up to the contactor fingers. A 0.01 µF high Figure 1. Output Load Figure 2. Thevenin Equivalent frequency capacitor is also required between V CC and ground. To avoid signal reflections, proper termination must be used; for example, a 50 Ω test environment should be terminated into a 50 Ω load with 1.73V (Thevenin Voltage) at the comparator input, and a 116 Ω resistor must be used in series with D OUT to match 166Ω (Thevenin Resistance). AC TEST CONDITIONS |
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