LM556 Dual 555 Timer Integrated Circuit

Overview: LM556 Dual 555 Timer IC

The LM556 Dual 555 Timer IC combines two precision timing circuits in a single 14-pin DIP package, offering reliable, versatile solutions for both monostable and astable multivibrator applications. Designed for engineers and circuit designers requiring dependable timing performance, the LM556 enables independent use of two timing circuits with shared power and ground connections.

Key Features and Technical Specifications

• Dual timing circuits—two independent 555 timers in one package
• 14-pin through-hole DIP form factor for easy prototyping and soldering
• Wide supply voltage range: 4.5V to 16V
• Low standby current for energy-sensitive applications
• Adjustable duty cycle and timing parameters using external resistors and capacitors
• TTL and CMOS logic compatibility
• Pin-for-pin compatible with industry-standard LM556, NE556, and equivalent dual timer ICs
• NTE Part Number: NTE978

Applications

• Astable multivibrators (oscillators, pulse generators, clock circuits)
• Monostable multivibrators (one-shot pulse generation, timers)
• Sequential timing circuits
• PWM signal generation
• LED and relay drivers
• Industrial timing controls and instrumentation

Usage Information

The LM556 dual timer IC offers flexible configuration for both monostable and astable modes, depending on your external component selection (resistors and capacitors). Both timer sections operate independently, supporting custom time delays and pulse widths. For detailed timing calculations, refer to LM555 standard configurations—each section of the LM556 works identically to a single 555 timer circuit but in a dual configuration, optimizing board space and component count in complex designs.

This part is the equivalent replacement for the following:

1415-164, 1415-306, 1826-0205, 25A-LM-556N, 37-556, 37-556(ATARI), 48-2212, 48-2212(EXIDY), 48-2215(EXIDY), 551-030-00, 556, 556D, 556(IC-TIMER), 556(ICTIMER), 556J, 556L, 5C-9002, 6-893, 901523-03, 935-9966, 9-759-700-82, A1-ICT-MDL-001, C6131P(HEP), ECG978, HEP-C6131P, ICM7556, ICM7556IPD, KA556, KIA556P, LM556, LM556CN, LM556N, LM7815, LS555-2, MC3456P, NE556, NE556A, NE556N, NE556V, NJM556D, NTE978, RC556DB, RC556DC, RS1728, SG556CN, SK3689, SK3689/978, TDB0556A, TM978, UA556PC, X440055560, XR-556, XR556, XR-556CP, XR556V