STMicroelectronics Introduces Devices in Silicon Oscillator Family
July 3, 2008 // Published as a news service by IHS
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STMicroelectronics (ST) introduced 10 MHz, 12 MHz and 16 MHz devices in its STCL1120 family of silicon oscillators.
Specified for operation from –20 to +85 degrees Celsius, the STCL1120 serves motor-control applications, home appliances, building controllers, display drivers, advanced battery chargers and low-speed universal serial bus (USB) peripherals such as computer keyboards or mice.
According to ST, the devices combine fast startup and immunity to shock, vibration and electromagnetic interference (EMI) with lower operating current and a chip-select control for more efficient power management compared with other silicon-based devices.
The startup time of 50 ms and 0.65 mA operating current for the 12 MHz version combine with the chip-select capability to enable power savings for engineers seeking an alternative to ceramic or quartz-based oscillators, ST said.
No external components are required, allowing designers to eliminate the capacitance matching typically necessary with ceramic resonators.
The STCL1120 oscillators also operate directly from a 5 volt (V) supply.
By implementing an external chip-select pin, the STCL1120 provides a way for engineers to stop the clock when the application is in standby mode. ST said this gains extra power savings by reducing the oscillator current to less than 3 microamps.
The push-pull complementary metal-oxide semiconductor (CMOS) compatible output produces a square wave for direct interfacing with on-board components including logic devices, microcontrollers, field-programmable gate arrays (FPGAs) and application-specific integrated circuits (ASICs).
The fixed operating frequency is accurate to within ±1.5% throughout all operating conditions, ST said.
A 32 kHz silicon oscillator is also offered, and further variants of the oscillators will be introduced.
Packaged in a five-lead small-outline transistor 23 (SOT23) package, the STCL1120 family is available immediately in production quantities.
Source: STMicroelectronics (ST).