LM80CIMT-3 National Semiconductor, LM80CIMT-3 Datasheet - Page 6

• Manufacturer Part Number: LM80CIMT-3
• Manufacturer: National Semiconductor

Specifications of LM80CIMT-3

• Watchdog Timer: Yes
• Chip Enable Signals: No
• Package Type: TSSOP
• Operating Supply Voltage (min): 2.8V
• Operating Supply Voltage (max): 5.75V
• Operating Temp Range: -25C to 125C
• Operating Temperature Classification: Commercial
• Power Fail Detection: No
• Mounting: Surface Mount
• Pin Count: 24
• Battery Backup Switching: No
• Manual Reset: No
• Lead Free Status / RoHS Status: Not Compliant

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SERIAL BUS TIMING CHARACTERISTICS
t
t
t
t
t
1
2
3
4
5
AC Electrical Characteristics
The following specifications apply for +2.8 V
unless otherwise specified. Boldface limits apply for T
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: All voltages are measured with respect to GND, unless otherwise specified
Note 3: When the input voltage (V
The 20 mA 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.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation at any temperature is P
Note 5: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 6: See the section titled “Surface Mount” found in any post 1986 National Semiconductor Linear Data Book for other methods of soldering surface mount
devices.
Note 7: Each input and output is protected by a nominal 6.5V breakdown voltage zener diode to GND; as shown below, input voltage magnitude up to 0.3V above
V
can occur if these diodes are forward biased by more than 50 mV. As an example, if V
conversions.
An x indicates that the diode exists.
+
or 0.3V below GND will not damage the LM80. There are parasitic diodes that exist between the inputs and the power supply rails. Errors in the ADC conversion
Symbol
SCL (Clock) Period
Data In Setup Time to SCL High
Data Out Stable After SCL Low
SDA Low Setup Time to SCL Low (start)
SDA High Hold Time After SCL High (stop)
IN
) at any pin exceeds the power supplies (V
Parameter
D
= (T
FIGURE 1. Serial Bus Timing Diagram
DC
J
≤
max−T
V
+
≤
A
+3.8 V
)/θ
A
JA
.
= T
DC
J
= T
IN
for LM80CIMT-3, +4.25 V
6
< (GND or GNDA) or V
MIN
+
to T
is 4.50 V
Conditions
MAX
; all other limits T
DC
10004005
, input voltage must be
J
max, θ
IN
>V
+
JA
), the current at that pin should be limited to 5 mA.
DC
(Note
Typical
and the ambient temperature, T
≤
V
A
+
8)
= T
≤
≤
+5.75 V
J
4.55 V
= 25°C.
(Note
Limits
DC
DC
100
100
100
2.5
, to ensure accurate
0
(Note
for LM80CIMT-5,
9)
10004004
A
13)
. The maximum
(Limits)
μs (min)
ns (min)
ns (min)
ns (min)
ns (min)
Units