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Touchstone Intros Four New Timer ICs
Milpitas, CA — Touchstone Semiconductor has added four new, high-accuracy, micropower timer ICs to its rapidly expanding family of "NanoWatt Analog
" timer integrated circuits. In addition to all other Touchstone Semiconductor ICs, these new analog timers are all in stock and ready to ship from Digi-Key, the company's authorized distributor.
These new, higher-single-supply voltage, second-generation timer ICs, like the company's very popular TS3001 and TS3002, operate over a wider supply voltage range (1.55 to 5.25V) and consume very little supply current (<2µA). To set the output frequency (or period) in these new timers, only a single resistor is needed. For the TS3003 and TS3006, the output frequency can be set from 9kHz to 300kHz. For the TS3004 and TS3005, an internal 3-bit counter was added that can program the output period from 3.3µs to 233s (TS3004) or from 1.7ms to 33hrs (TS3005).
Three of the timers include a DC-voltage-controlled pulse-width modulation (PWM) output (the TS3003, the TS3004, and the TS3005). All four timers are available in space-saving, low-profile, exposed-backside-paddle TDFN packaging.
The TS3003 is a higher supply voltage version of the very successful TS3001, consuming 1.9µA supply current and provides an output frequency that is single-resistor-tunable from 9kHz to 300kHz. It is available in a 10-pin TDFN-EP package.
The TS3004 includes an internal 3-bit counter, also operates on 1.9µA supply current. With a single external resistor, the user can set the output frequency to one of eight settings from 0.0043Hz to 300kHz. The device is available in a 10-pin TDFN-EP package. The TS3005 provides functionally similar to the TS3004 while consuming less than 1.35µA. It is an extended range timer where the user can set the output frequency from 0.0084mHz (the reciprocal of 33hrs) to 588Hz (the reciprocal of 1.7ms). This is three times longer than the next closest solution. The IC is available in a 10-pin TDFN package.
The TS3006 is functionally similar to the TS3003, but is designed for cost-sensitive applications where a fixed frequency output is all that is needed. The IC is available in an 8-pin TDFN package. These new micropower timer ICs are described as being easy-to-use and versatile. They are optimized for ultra-long life, low-frequency battery-powered/portable applications, including micropower PWM control, pulse-position modulation control, clock generation and sequential timing. They can also be used as a low parts count micropower oscillators and compact replacements for crystal and ceramic oscillators.
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