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PALCE16V8 Datasheet(PDF) 12 Page - Lattice Semiconductor |
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PALCE16V8 Datasheet(HTML) 12 Page - Lattice Semiconductor |
12 / 32 page 12 PALCE16V8H-5/7 (Com’l) CAPACITANCE1 Note: 1. These parameters are not 100% tested, but are evaluated at initial characterization and at any time the design is modified where capacitance may be affected. SWITCHING CHARACTERISTICS OVER COMMERCIAL OPERATING RANGES1 Notes: 1. See “Switching Test Circuit” for test conditions. 2. Output delay minimums for tPD, tCO, tPZX, tPXZ, tEA, and tER are defined under best case conditions. Future process improvements may alter these values; therefore, minimum values are recommended for simulation purposes only. 3. Skew testing takes into account pattern and switching direction differences between outputs that have equal loading. 4. These parameters are not 100% tested, but are calculated at initial characterization and at any time the design is modified where frequency may be affected. 5. tCF is a calculated value and is not guaranteed. tCF can be found using the following equation: tCF = 1/fMAX (internal feedback) – tS. Parameter Symbol Parameter Description Test Conditions Typ Unit CIN Input Capacitance VIN = 2.0 V VCC = 5.0 V, TA = 25 °C, 5 pF COUT Output Capacitance VOUT = 2.0 V f = 1 MHz 8 pF Parameter Symbol Parameter Description -5 -7 Unit Min 2 Max Min 2 Max tPD Input or Feedback to Combinatorial Output 1 5 3 7.5 ns tS Setup Time from Input or Feedback to Clock 3 5 ns tH Hold Time 0 0 ns tCO Clock to Output 1415 ns tSKEWR Skew Between Registered Outputs (Note 3) 1 1 ns tWL Clock Width LOW 3 4 ns tWH HIGH 3 4 ns fMAX Maximum Frequency (Note 4) External Feedback 1/(tS+tCO) 142.8 100 MHz Internal Feedback (fCNT) 1/(tS+tCF) (Note 5) 166 125 MHz No Feedback 1/(tWH+tWL) 166 125 MHz tPZX OE to Output Enable 1616 ns tPXZ OE to Output Disable 1516 ns tEA Input to Output Enable Using Product Term Control 2639 ns tER Input to Output Disable Using Product Term Control 2539 ns |
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