LMC555 CMOS General-Purpose Timer

Specifications

Product Overview

The LMC555 is a Texas Instruments CMOS general-purpose timer classified in the Signal_Chain category. Datasheet-extracted operating data identifies a specified supply operating voltage of 1.5 V, typical power dissipation below 1 mW at VS=5 V, and a maximum astable-frequency capability of 3 MHz. Timing-related values include 1.1 ms typical timing accuracy under the listed switch conditions and a 100 ns trigger-to-output propagation delay at VS=5 V.

Package choices include D (SOIC-8) at 4.9mm x 6mm, DGK (VSSOP-8) at 3mm x 4.9mm, P (PDIP-8) at 9.81mm x 9.43mm, and YBF/YPB (DSBGA-8) at 1.75mm x 1.75mm. Thermal and power ratings vary by package, with maximum allowable power dissipation values specified at TA=25°C for PDIP-8, SOIC-8, VSSOP-8, and 8-bump DSBGA packages.

The extracted parameters support use in timer, astable oscillator, pulse, and delay circuits where supply current, output drive, timing shift, and package thermal behavior must be checked against the design conditions.

Key Features

• CMOS general-purpose timer from Texas Instruments
• Specified 1.5 V supply operating voltage
• Maximum astable frequency rated at 3 MHz
• Typical power dissipation below 1 mW at VS=5 V
• Output current test levels of -10 mA and 50 mA
• Absolute maximum supply voltage is 15 V
• Absolute maximum output current is 100 mA
• Trigger current is 10 pA at VS=5 V
• Timing shift with supply is 0.3 %/V
• Trigger-to-output propagation delay is 100 ns

Typical Applications

• Astable oscillator circuits
• Timing interval generation
• Pulse generation circuits
• Delay timing circuits
• Low-power timer designs
• 1.5 V supply timing circuits
• Compact DSBGA timer layouts

Procurement Notes

When requesting a quote for LMC555, 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.