Specifications
| Type | Description |
|---|---|
| Part Number | LM555 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | SOIC-8 4.90 mm x 3.91 mm; PDIP-8 9.81 mm x 6.35 mm; VSSOP-8 3.00 mm x 3.00 mm |
| Timer Function | Generates accurate time delays or oscillation; general device description; source page 1 |
| Operating Modes | Astable and monostable; general operation; source page 1 |
| Output Source/Sink Current | Up to 200 mA; output circuit capability; source page 1 |
| Timing Range | Microseconds through hours; feature listing; source page 1 |
| Temperature Stability | Better than 0.005%/°C; feature listing; source page 1 |
| Supply Voltage Recommended | 18 V max; recommended operating conditions; source page 4 |
| Supply Voltage Electrical | 4.5 V min, 16 V max; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 5 |
| Operating Free-Air Temperature | 0°C min, 70°C max; recommended operating conditions; source page 4 |
| Operating Junction Temperature | 70°C max; recommended operating conditions; source page 4 |
| Storage Temperature | -65°C min, 150°C max; absolute maximum ratings; source page 4 |
| Power Dissipation | 1180 mW max; LM555CM, LM555CN; absolute maximum ratings; source page 4 |
| Power Dissipation | 613 mW max; LM555CMM; absolute maximum ratings; source page 4 |
| ESD Rating HBM | ±500 V; human-body model per ANSI/ESDA/JEDEC JS-001; SOIC package; source page 4 |
| Thermal Resistance Junction-to-Ambient | 106°C/W; PDIP-8 package; source page 4 |
| Thermal Resistance Junction-to-Ambient | 170°C/W; SOIC-8 package; source page 4 |
| Thermal Resistance Junction-to-Ambient | 204°C/W; VSSOP-8 package; source page 4 |
| Supply Current | 3 mA typ, 6 mA max; VCC=5 V, RL=∞, low state; source page 5 |
| Supply Current | 10 mA typ, 15 mA max; VCC=15 V, RL=∞, low state; source page 5 |
| Timing Error Monostable Initial Accuracy | 1%; RA=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Monostable Drift With Temperature | 50 ppm/°C; RA=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Monostable Accuracy Over Temperature | 1.5%; RA=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Monostable Drift With Supply | 0.1%/V; RA=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Astable Initial Accuracy | 2.25%; RA, RB=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Astable Drift With Temperature | 150 ppm/°C; RA, RB=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Astable Accuracy Over Temperature | 3.0%; RA, RB=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Timing Error Astable Drift With Supply | 0.30%/V; RA, RB=1 kΩ to 100 kΩ, C=0.1 µF; source page 5 |
| Threshold Voltage | 0.667 x VCC; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 5 |
| Trigger Voltage | 5 V; VCC=15 V; source page 5 |
| Trigger Voltage | 1.67 V; VCC=5 V; source page 5 |
| Trigger Current | 0.5 µA typ, 0.9 µA max; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 5 |
| Reset Voltage | 0.4 V min, 0.5 V typ, 1 V max; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 5 |
| Reset Current | 0.1 mA typ, 0.4 mA max; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 5 |
| Threshold Current | 0.1 µA typ, 0.25 µA max; determines maximum RA+RB for 15 V operation; source page 5 |
| Control Voltage Level | 9 V min, 10 V typ, 11 V max; VCC=15 V; source page 5 |
| Control Voltage Level | 2.6 V min, 3.33 V typ, 4 V max; VCC=5 V; source page 5 |
| Pin 7 Leakage Output High | 1 nA typ, 100 nA max; discharge pin output high; source page 5 |
| Pin 7 Saturation Output Low | 180 mV typ; VCC=15 V, I7=15 mA; source page 5 |
| Pin 7 Saturation Output Low | 80 mV typ, 200 mV max; VCC=4.5 V, I7=4.5 mA; source page 5 |
| Output Voltage Drop Low | 0.1 V typ, 0.25 V max; VCC=15 V, ISINK=10 mA; source page 5 |
| Output Voltage Drop Low | 0.4 V typ, 0.75 V max; VCC=15 V, ISINK=50 mA; source page 5 |
| Output Voltage Drop Low | 2 V typ, 2.5 V max; VCC=15 V, ISINK=100 mA; source page 5 |
| Output Voltage Drop Low | 2.5 V max; VCC=15 V, ISINK=200 mA; source page 5 |
| Output Voltage Drop Low | 0.25 V typ, 0.35 V max; VCC=5 V, ISINK=5 mA; source page 5 |
| Output Voltage High | 12.5 V typ; ISOURCE=200 mA, VCC=15 V; source page 6 |
| Output Voltage High | 12.75 V min, 13.3 V typ; ISOURCE=100 mA, VCC=15 V; source page 6 |
| Output Voltage High | 2.75 V min, 3.3 V typ; VCC=5 V; source page 6 |
| Output Rise Time | 100 ns; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 6 |
| Output Fall Time | 100 ns; TA=25°C, VCC=5 V to 15 V unless otherwise specified; source page 6 |
| Monostable Timing Formula | t = 1.1 x RA x C; monostable operation; source page 9 |
| Trigger Threshold | Less than 1/3 VCC; negative trigger pulse on pin 2 sets flip-flop in monostable operation; source page 9 |
| Timing End Threshold | 2/3 VCC; capacitor voltage resets flip-flop in monostable operation; source page 9 |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments LM555 is a 555 precision timer IC in the Signal_Chain category. It generates accurate time delays or oscillation and operates in astable or monostable modes. The listed timing range extends from microseconds through hours, with temperature stability better than 0.005%/°C.
Electrical operation includes a 4.5 V minimum to 16 V maximum supply range under electrical-characteristics conditions, with 18 V maximum listed in recommended operating conditions. Supply current is specified as 3 mA typical and 6 mA maximum at VCC = 5 V, and 10 mA typical and 15 mA maximum at VCC = 15 V, both with RL = infinity in the low state.
Output capability reaches up to 200 mA source or sink current. Threshold behavior includes 0.667 x VCC threshold voltage, trigger levels of 5 V at VCC = 15 V and 1.67 V at VCC = 5 V, and monostable switching at less than 1/3 VCC trigger threshold and 2/3 VCC timing-end threshold. Package options include SOIC-8, PDIP-8, and VSSOP-8.
Key Features
- Generates accurate time delays or oscillation
- Astable and monostable operating modes
- Output sources or sinks up to 200 mA
- Timing range spans microseconds through hours
- Temperature stability better than 0.005%/°C
- Electrical supply range from 4.5 V to 16 V
- Recommended free-air operation from 0°C to 70°C
- Monostable timing follows t = 1.1 x RA x C
- Output rise and fall times are 100 ns
- SOIC-8, PDIP-8, and VSSOP-8 package options
Typical Applications
- Accurate time-delay generation
- Astable oscillator circuits
- Monostable pulse timing
- Microsecond-to-hour timing circuits
- Output drive timing stages
- Reset-controlled timing functions
- Control-voltage adjusted timing
Procurement Notes
When requesting a quote for LM555, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What does the LM555 timer IC generate?
The LM555 generates accurate time delays or oscillation. The extracted operating modes are astable and monostable, supporting timing functions from microseconds through hours.
What supply range is specified for the LM555?
The electrical supply range is 4.5 V minimum to 16 V maximum under the stated electrical-characteristics conditions. The recommended operating conditions list supply voltage up to 18 V maximum.
How much output current can the LM555 handle?
The LM555 output circuit capability is specified at up to 200 mA source or sink current. Output voltage values are also specified at source and sink conditions including 200 mA.
What packages are listed for the LM555?
The listed package options are SOIC-8 at 4.90 mm x 3.91 mm, PDIP-8 at 9.81 mm x 6.35 mm, and VSSOP-8 at 3.00 mm x 3.00 mm.
What is the LM555 monostable timing equation?
For monostable operation, the extracted timing formula is t = 1.1 x RA x C. Related monostable behavior includes triggering below 1/3 VCC and timing completion at 2/3 VCC.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 21, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.