
LMC555
CMOS Timer
General Description
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
Semiconductor’s LMCMOS process extends both the fre-
quency range and low supply capability.
Features
n
Less than 1 mW typical power dissipation at 5V supply
n
3 MHz astable frequency capability
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
Pulse Width Modulator
00866920
00866915
Ordering Information
Package
Temperature Range
Package Marking
Transport Media
NSC Drawing
Industrial
40C to +85C
8-Pin Small Outline (SO)
LMC555CM
Rails
M08A
LMC555CMX
2.5k Units Tape and Reel
8-Pin Mini Small Outline
(MSOP)
LMC555CMM
ZC5
1k Units Tape and Reel
MUA08A
LMC555CMMX
3.5k Units Tape and Reel
8-Pin Molded Dip (MDIP)
LMC555CN
Rails
N08E
8-Bump micro SMD
LMC555CBP
F1
250 Units Tape and Reel
BPA08EFB
LMC555CBPX
3k Units Tape and Reel
8-Bump micro SMD
NOPB
LMC555CTP
F02
250 Units Tape and Reel
TPA08EFA
LMC555CTPX
3k Units Tape and Reel
Note: See Mil-datasheet MNLMC555-X for specifications on the military device LMC555J/883.
LMCMOS is a trademark of National Semiconductor Corp.
May 2006
LMC555
CMOS
T
imer
2006 National Semiconductor Corporation
DS008669
www.national.com