lm84cimqax National Semiconductor Corporation, lm84cimqax Datasheet - Page 8

• Manufacturer Part Number: lm84cimqax
• Description: Diode Input Digital Temperature Sensor With Two-wire Interface
• Manufacturer: National Semiconductor Corporation

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NC (pins 1, 5, 9)
V
D+
D−
ADD0, ADD1
Logic Electrical Characteristics
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 (V
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.
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
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 6: Typicals are at T
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: The Temperature Error specification does not include an additional error of
Note 9: The Temperature Error will vary less than
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.
Note 13: Holding the SMBData and/or SMBCLK lines Low for a time interval greater than t
state of an SMBus communication (SMBCLK and SMBData set High).
CC
Pin Name
A
= 25˚C and represent most likely parametric norm.
D1
x
x
x
I
) at any pin exceeds the power supplies (V
D2
x
x
x
x
D3
x
x
x
x
x
FIGURE 1. ESD Protection Input Structure
±
1.0˚C for a variation in V
D4
x
resistor. Machine model, 200 pF discharged directly into each pin.
(Continued)
I
CC
<
8
of 3V to 3.6V from the nominal of 3.3V.
GND or V
±
1˚C, caused by the quantization error.
TIMEOUT
I
>
V
CC
T_CRIT_A
SMBData
NC (pin 13)
SMBCLK
NC (pin 16)
will cause the LM84 to reset SMBData and SMBCLK to the IDLE
), the current at that pin should be limited to 5 mA. The 20 mA
Pin Name
DS100961-8
D1
D2
x
x
x
x
D3
x
x
x
D4