LMC555 Datasheet, PDF (4/12 Pages) National Semiconductor (TI) – CMOS Timer

Electrical Characteristics (Notes 1, 2)
Test Circuit, T = 25˚C, all switches open, RESET to V_S unless otherwise noted (Continued)
Symbol Parameter
Conditions
t_PD
Trigger Propagation Delay V_S = 5V, Measure Delay
from Trigger to Output
Min Typ Max
Units
(Limits)
100
ns
Note 1: All voltages are measured with respect to the ground 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 func-
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-
antee 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.
Note 3: See AN-450 for other methods of soldering surface mount devices, and also AN-1112 for micro SMD considerations.
Note 4: If the RESET pin is to be used at temperatures of −20˚C and below V_S is required to be 2.0V or greater.
Note 5: For device pinout please refer to table 1
Test Circuit (Note 5)
Maximum Frequency Test Circuit (Note 5)
Pin Function
GND
Trigger
Output
Reset
Control Voltage
Threshold
Discharge
V⁺
DS008669-2
TABLE 1. Package Pinout Names vs. Pin Function
Package Pin numbers
8-Pin SO,MSOP, and MDIP
8-Bump micro SMD
1
7
2
6
3
5
4
4
5
3
6
2
7
1
8
8
DS008669-3
www.national.com
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