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AGL1000V2-FGG144I Datasheet(PDF) 19 Page - Actel Corporation |
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AGL1000V2-FGG144I Datasheet(HTML) 19 Page - Actel Corporation |
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19 / 212 page 
IGLOO DC and Switching Characteristics Ad vance v0.5 2-5 Thermal Characteristics Introduction The temperature variable in the Actel Designer software refers to the junction temperature, not the ambient temperature. This is an important distinction because dynamic and static power consumption cause the chip junction to be higher than the ambient temperature. EQ 2-1 can be used to calculate junction temperature. TJ = Junction Temperature = ∆T + TA EQ 2-1 where: TA = Ambient Temperature ∆T = Temperature gradient between junction (silicon) and ambient ∆T = θja * P θja = Junction-to-ambient of the package. θja numbers are located in Table 2-5 on page 2-6. P = Power dissipation Figure 2-2 • V2 Devices – I/O State as a Function of VCCI and VCC Voltage Levels Region 1: I/O buffers are OFF Region 2: I/O buffers are ON. I/Os are functional (except differential inputs) but slower because V CCI /V CC are below specification. For the same reason, input buffers do not meet V IH /V IL levels, and output buffers do not meet V OH /V OL levels. Min V CCI datasheet specification voltage at a selected I/O standard; i.e., 1.14 V,1.425 V, 1.7 V, 2.3 V, or 3.0 V VCC VCC = 1.14 V Region 1: I/O Buffers are OFF Activation trip point: Va = 0.85 V ± 0.2 V Deactivation trip point: Vd = 0.75 V ± 0.2 V Activation trip point: Va = 0.9 V ± 0.15 V Deactivation trip point: Vd = 0.8 V ± 0.15 V VCC = 1.575 V Region 5: I/O buffers are ON and power supplies are within specification. I/Os meet the entire datasheet and timer specifications for speed, V IH /V IL , V OH /V OL , etc. Region 4: I/O buffers are ON. I/Os are functional (except differential but slower because V CCI is below specification. For the same reason, input buffers do not meet V IH /V IL levels, and output buffers do not meet V OH /V OL levels. Region 4: I/O buffers are ON. I/Os are functional (except differential inputs) where VT can be from 0.58 V to 0.9 V (typically 0.75 V) VCCI Region 3: I/O buffers are ON. I/Os are functional; I/O DC specifications are met, but I/Os are slower because the V CC is below specification. V CC = VCCI + VT |
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