TS555CN
TS555CN - 2.7MHz Low-Power CMOS Timer | STMicroelectronics
The STMicroelectronics TS555CN is a low-power, single CMOS timer with a maximum astable frequency of 2.7 MHz, a typical supply current of 100 µA at 5 V, and an operating supply range up to 18 V, housed in an 8-pin DIP package. It provides the familiar 555 timer functions in astable and monostable configurations while offering pin-to-pin and functional compatibility with the bipolar NE555.
A 555 timer is a programmable timing IC that combines a resistor, capacitor, and internal threshold comparator into a compact oscillator or one-shot pulse generator. The TS555CN belongs to the CMOS timer, oscillator, and clock-and-timing hierarchy: it can generate continuous periodic waveforms in astable mode or produce a timed output pulse in monostable mode. Its CMOS implementation is especially useful in low-power and higher-frequency circuits where lower supply current than a conventional bipolar NE555 is valuable.
Key features include very low typical supply current, a maximum astable frequency of 2.7 MHz, wide operating voltage support to 18 V, high input impedance, and output compatibility with TTL, CMOS, and logic families. According to the STMicroelectronics manufacturer datasheet, typical supply current is 110 µA at 5 V and 90 µA at 3 V, with reduced current spikes during output transitions. These characteristics make the device practical for portable timing, pulse generation, debouncing, and periodic-control applications.
Internally, the TS555CN uses CMOS circuitry to implement the comparator, flip-flop, discharge transistor, and timing-control functions of a standard 555 timer. In astable operation, two external resistors and one capacitor establish the oscillation period; in monostable operation, one resistor and one capacitor set the pulse width. The external timing elements determine practical accuracy, while the timer provides repeatable thresholding and state control.
Typical uses include low-power delay circuits, oscillator clocks, LED flashers, pulse generators, debounce networks, and control timing in embedded equipment. The TS555CN can also replace a standard NE555 where the circuit permits CMOS supply current and operating-voltage differences. Before substitution, verify trigger-level, output-drive, timing-tolerance, and maximum-frequency requirements against the actual design.
For PCB layout, keep the timing capacitor and resistor leads short, connect the decoupling capacitor close to VCC and GND, and avoid long traces around high-impedance threshold and control pins. Because the DIP package has exposed through-hole leads, mechanical spacing and soldering cleanliness should also be considered. This page combines manufacturer specifications, verified distributor information, replacement guidance, and practical design notes for engineering selection.
견적 요청
재고 있음
