Click to expand full text
NA556, NE556, SA556, SE556
SLFS023H – APRIL 1978 – REVISED DECEMBER 2024
Nx556, Sx556 Dual Precision Timers
1 Features
• Two precision timing circuits per package • Astable or monostable operation • TTL-compatible output can sink or source up to
200mA • Active pullup or pulldown
2 Applications
• Precision timers from microseconds to hours • Pulse-shaping circuits • Missing-pulse detectors • Pulse-width modulators • Pulse-position modulators • Sequential timers • Pulse generators • Frequency dividers • Application timers • Industrial controls
CONT
RESET
VCC
R THRES
R
R1 R1 S
OUT
TRIG
R DISCH
GND
Simplified Schematic (Each Timer)
3 Description
The Nx556 and Sx556 devices provide two independent timing circuits of the NA555, NE555, SA555, or SE555 type in each package.