May 2006
LMC555
CMOS Timer
General Description
Features
n Less than 1 mW typical power dissipation at 5V supply
n 3 MHz astable frequency capability
The LMC555 is a CMOS version of the industry standard
555 series general purpose timers. In addition to the stan-
dard package (SOIC, MSOP, and MDIP) the LMC555 is also
available in a chip sized package (8 Bump micro SMD) using
National’s micro SMD package technology. The LMC555
offers the same capability of generating accurate time delays
and frequencies as the LM555 but with much lower power
dissipation and supply current spikes. When operated as a
one-shot, the time delay is precisely controlled by a single
external resistor and capacitor. In the stable mode the oscil-
lation frequency and duty cycle are accurately set by two
external resistors and one capacitor. The use of National
n 1.5V supply operating voltage guaranteed
n Output fully compatible with TTL and CMOS logic at 5V
supply
n Tested to −10 mA, +50 mA output current levels
n Reduced supply current spikes during output transitions
n Extremely low reset, trigger, and threshold currents
n Excellent temperature stability
n Pin-for-pin compatible with 555 series of timers
n Available in 8-pin MSOP Package and 8-Bump micro
SMD package
™
Semiconductor’s LMCMOS process extends both the fre-
quency range and low supply capability.
Pulse Width Modulator
00866915
00866920
Ordering Information
Package
Temperature Range
Industrial
Package Marking
Transport Media
NSC Drawing
−40˚C to +85˚C
LMC555CM
8-Pin Small Outline (SO)
Rails
LMC555CM
M08A
LMC555CMX
LMC555CMM
LMC555CMMX
LMC555CN
2.5k Units Tape and Reel
1k Units Tape and Reel
3.5k Units Tape and Reel
Rails
8-Pin Mini Small Outline
(MSOP)
ZC5
LMC555CN
F1
MUA08A
N08E
8-Pin Molded Dip (MDIP)
8-Bump micro SMD
LMC555CBP
LMC555CBPX
LMC555CTP
LMC555CTPX
250 Units Tape and Reel
3k Units Tape and Reel
250 Units Tape and Reel
3k Units Tape and Reel
BPA08EFB
8-Bump micro SMD
NOPB
F02
TPA08EFA
Note: See Mil-datasheet MNLMC555-X for specifications on the military device LMC555J/883.
™
LMCMOS is a trademark of National Semiconductor Corp.
© 2006 National Semiconductor Corporation
DS008669
www.national.com