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LM86 Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LM86 Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 21 page SMBus DIGITAL SWITCHING CHARACTERISTICS Unless otherwise noted, these specifications apply for V DD=+3.0 Vdc to +3.6 Vdc, C L (load capacitance) on output lines = 80 pF. Boldface limits apply for TA =TJ =TMIN to TMAX; all other limits T A =TJ = +25˚C, unless otherwise noted. The switching characteristics of the LM86 fully meet or exceed the published specifi- cations of the SMBus version 2.0. The following parameters are the timing relationships between SMBCLK and SMBData sig- nals related to the LM86. They adhere to but are not necessarily the SMBus bus specifications. Symbol Parameter Conditions Typical Limits Units (Note 6) (Note 7) (Limit) t BUF SMBus Free Time Between Stop and Start Conditions 1.3 µs (min) SMBus Communication 10130340 Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions. Note 2: When the input voltage (VI) at any pin exceeds the power supplies (VI < GND or VI > VDD), the current at that pin should be limited to 5 mA. Parasitic components and or ESD protection circuitry are shown in the figure below for the LM86’s pins. The nominal breakdown voltage of D3 is 6.5 V. Care should be taken not to forward bias the parasitic diode, D1, present on pins: D+, D−. Doing so by more than 50 mV may corrupt a temperature measurements. Pin Name PIN # D1 D2 D3 D4 D5 D6 R1 SNP ESD CLAMP V DD (V+) 1 x x D+ 2 x x xxx x D− 3 x x xxx x T_CRIT_A 4x x x ALERT 6x x x SMBData 7 x x x SMBCLK 8 x Note: An “x” indicates that the diode exists. Note 3: See the URL ”http://www.national.com/packaging/“ for other recommendations and methods of soldering surface mount devices. Note 4: Human body model, 100pF discharged through a 1.5k Ω resistor. Machine model, 200pF discharged directly into each pin. Note 5: Thermal resistance junction-to-ambient when attached to a printed circuit board with 2 oz. foil: – SOIC-8 = 168˚C/W – MSOP-8 = 210˚C/W Note 6: Typicals are at TA = 25˚C and represent most likely parametric norm. Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). 10130313 FIGURE 1. ESD Protection Input Structure www.national.com 6 |
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