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.

maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5 mA to four.

Parasitics and or ESD protection circuitry are shown in the figure below for the LM84’s pins. The nominal breakdown voltage of the zener D3 is 6.5V. Care should

be taken not to forward bias the parasitic diode, D1, present on pins: NC pins 1,5 and 9, D+, ADD1 and ADD0. Doing so by more than 50 mV may corrupt a

temperature or voltage measurement.

Pin Name

D1

D2

D3

D4

Pin Name

D1

D2

D3

D4

NC (pins 1, 5, 9)

x

x

x

T_CRIT_A

x

V

CC

x

SMBData

x

x

D+

x

x

x

NC (pin 13)

x

x

D−

x

x

x

SMBCLK

x

ADD0, ADD1

x

x

x

NC (pin 16)

x

Note: An x indicates that the diode exists.

Note 3: See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” or the section titled “Surface Mount” found in a current National

Semiconductor Linear Data Book for other methods of soldering surface mount devices.

Note 4: Human body model, 100 pF discharged through a 1.5 k

Ω resistor. Machine model, 200 pF discharged directly into each pin.

Note 5: Thermal resistance of the QSOP-16 package is TBD ˚C/W, junction-to-ambient when attached to a printed circuit board with 2 oz. foil.

Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 10: Quiescent current will not increase substantially with an active SMBus.

Note 11: This specification is provided only to indicate how often temperature data is updated. The LM84 can be read at any time without regard to conversion state

(and will yield last conversion result).

Note 12: Default values set at power up.

state of an SMBus communication (SMBCLK and SMBData set High).

DS100961-8

FIGURE 1. ESD Protection Input Structure

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