lm48555tlx National Semiconductor Corporation, lm48555tlx Datasheet - Page 4

• Manufacturer Part Number: lm48555tlx
• Description: Ceramic Speaker Driver
• Manufacturer: National Semiconductor Corporation

Note 1: All voltages are measured with respect to the GND pin, unless otherwise specified.
Note 2: 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. Electrical Characteristics state DC and AC electrical specifications under particular test conditions
which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters
where no limit is given, however, the typical value is a good indication of device performance.
, θ
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
, and the ambient temperature, T
. The maximum
JMAX
JA
A
) / θ
allowable power dissipation is P
= (T
− T
or the given in Absolute Maximum Ratings, whichever is lower.
DMAX
JMAX
A
JA
Note 4: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 5: Machine Model, 220pF–240pF discharged through all pins.
Note 6: Typicals are measured at 25°C and represent the parametric norm.
Note 7: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9: Shutdown current is measured in a normal room environment. The SD pin should be driven as close as possible to GND for minimum shutdown current.
Note 10: The value for θ
is measured with the LM48555 mounted on a 3” x 1.5” (76.2mm x 3.81mm) four layer board. The copper thickness for all four layers
JA
is 0.5oz (roughly 0.18mm).
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