Colorado Springs, Colo. EM Microelectronic has introduced the EM7604, a low-power CMOS crystal oscillator circuit for network servers, computers, mobile phones, digital systems and portable field communications applications. The EM7604 is intended for use with a 32.768 kHz tuning fork crystal as a low frequency clock oscillator with no other external components required. The IC is also available as the EM1564, which combines the oscillator circuit with a tuning fork crystal in a single, low-profile footprint ceramic package.
The EM7604 is suitable for precision time references in real time clocks, timekeeping in network servers, computers, and mobile phones and as an improved alternative to embedded quartz oscillators, said the company. The IC also works well for metering electricity, gas and water. The small size and efficiency of the EM7604 makes it suitable as a general-purpose clock oscillator circuit for digital systems and in portable field communication applications.
"The EM7604 uses up to ten times less power than similar circuits from the competition," said Mougahed Darwish, president of the management board of EM Microelectronic, in a statement. "This ultra-low power circuit can be operated with a supply voltage ranging from 1.2 V to 5.5 V and power consumption as low as 250 nA. Additionally, the on-chip integrated oscillation capacitor provides excellent oscillator stability and tight frequency tolerance at an extended temperature range of up to 125°C."
The circuit is available in a small SOT23-6 package and is matched with low-cost SMD quartz available from Micro Crystal. It is also compatible with high series resistance crystals. Click the links for the EM7604 datasheet and fact sheet. The EM1564, which combines the EM7604 with a 32.768 kHz tuning fork crystal in a specially designed package, was developed through a joint effort between Micro Crystal and EM Microelectronic, two companies of the Swatch Group Electronic Systems (SGES). The EM1564 package can replace standard quartz or on-chip embedded oscillators.
Pricing for the EM7604 starts at $1.00 each in quantities of 1,000.
EM Microelectronic, 1-719-593-2883, www.emmicroelectronic.com