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DS89C21 Fiches technique(PDF) 3 Page - National Semiconductor (TI) |
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DS89C21 Fiches technique(HTML) 3 Page - National Semiconductor (TI) |
3 / 6 page Electrical Characteristics (Notes 2, 3) (Continued) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Pin Min Typ Max Units DRIVER AND RECEIVER CHARACTERISTICS I CC Supply Current No Load DI = V CC or GND V CC 3.0 6 mA DI = 2.4V or 0.5V 3.8 12 mA Switching Characteristics (Note 3) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units DIFFERENTIAL DRIVER CHARACTERISTICS t PLHD Propagation Delay LOW to HIGH R L = 100Ω ( Figures 2, 3) 2 4.9 10 ns t PHLD Propagation Delay HIGH to LOW C L = 50 pF 2 4.5 10 ns t SKD Skew, |t PLHD–t PHLD| 0.4 2.0 ns t TLH Transition Time LOW to HIGH ( Figures 2, 4) 2.2 9 ns t THL Transition Time HIGH to LOW 2.1 9 ns RECEIVER CHARACTERISTICS t PLH Propagation Delay LOW to HIGH C L = 50 pF ( Figures 5, 6) 6 18 30 ns t PHL Propagation Delay HIGH to LOW V DIFF = 2.5V 6 17.5 30 ns t SK Skew, |t PLH–t PHL|VCM = 0V 0.5 4.0 ns t r Rise Time ( Figure 7) 2.5 9 ns t f Fall Time 2.1 9 ns Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The tables of “Electrical Characteristics” specify conditions for device operation. Note 2: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise specified. Note 3: All typicals are given for VCC = 5.0V and T A = 25˚C. Note 4: f = 1 MHz, tr and tf ≤ 6 ns. Note 5: ESD Rating: HBM (1.5 k Ω, 100 pF) all pins ≥ 2000V. EIAJ (0 Ω, 200 pF) ≥ 250V Parameter Measurement Information DS011753-2 FIGURE 1. V OD and VOC Test Circuit www.national.com 3 |
Numéro de pièce similaire - DS89C21 |
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Description similaire - DS89C21 |
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