What the 100 kHz ceiling means for your timing circuit
The NE555PSR is a single 555-type timer/oscillator from Texas Instruments, rated for a maximum oscillation frequency of 100 kHz. That 100 kHz ceiling is the astable toggle limit — above it the output pulse width compresses until the comparator thresholds inside the chip can't reliably trigger. For most RC-timed delays, one-shots, and PWM generation below 100 kHz, this part covers the classic 555 application space without the higher-frequency trade-offs of the CMOS variants.
Package, footprint, and temperature grade
The 1.27 mm pitch SOIC footprint is a standard layout — the same land pattern serves the LM555CM or the SA555D without a board respin. Surface-mount only; no through-hole variant in this order code.