5 MHz programmable timer with military temperature range
The CD4536BNSR is a programmable timer from Texas Instruments that generates time delays or frequency-divided outputs from a single RC or crystal oscillator. It covers a count range from 2 to 2^24, giving the designer a wide window of timing intervals without cascading multiple devices. The 5 MHz maximum frequency sets the shortest achievable output period at 200 ns per count step, which is the practical ceiling for precision timing in this family. For longer delays, the 2^24 count ceiling extends the maximum interval to over 3 seconds at the same clock rate.
3 V to 18 V supply — one part for mixed-rail designs
The supply range from 3 V to 18 V lets the CD4536BNSR operate directly on a 3.3 V logic rail, a 5 V microcontroller bus, or a 12 V industrial supply without an intermediate regulator. This eliminates a voltage-conversion stage in the timing path and reduces BOM count. Quiescent supply current is 3 mA typical, which is low enough for battery-backed real-time-clock applications where the timer runs continuously. The current draw does not vary significantly across the supply range — the CMOS construction keeps the bias current stable.
The operating temperature range spans -55°C to 125°C, which is the military-grade envelope. This qualifies the part for avionics engine bays, downhole drilling tools, satellite payloads, and outdoor telecom cabinets where the ambient temperature swings beyond the industrial -40°C to 85°C band.
Active lifecycle — no end-of-life risk on this BOM line
The part is supplied in Tape & Reel (TR) or Cut Tape (CT) options, which matches automated pick-and-place assembly lines. Sourcing is per RFQ — confirm the BOM quantity and preferred packaging with your distributor at quote time.