DALLAS -- Dallas Semiconductor Corp. here today expanded its line of digital control devices for gigabit optical transceivers with the launch of the DS1846 NV device, which integrates three linear taper potentiometers, nonvolatile memory, and a central-processor supervisor in reduced TSSOP packaging.
By combining the potentiometers, EEPROM memory and micromonitor on a single chip, the new device can save board space and quicken the product development cycle by minimizing procurement delays, according to the company.
"As designers push to increase signal speed, precision control over the laser becomes critical," said Patrick Fedele, product manager for the digital potentiometer product line.
Fedele noted the new devices add a third potentiometer to an EEPROM-based dual-potentiometer function originally introduced by Dallas Semiconductor. The third potentiometer that can either provide a coarse trim to one of the other potentiometers or control a separate system parameter, he said.
In addition, the integrated micromonitor provides added sensor and control circuitry directly inside the transceiver module, which can enable designers to replace an external component in applications incorporating a central processing units.
The on-chip micromonitor tracks parameters critical to the CPU function. When a sense input detects an out-of-tolerance voltage level, the micromonitor initiates and holds a system reset until safe operating conditions return. The monitor is programmable for various voltage levels and includes a manual reset.
The DS1846 communicates via a standard 2-wire interface and operates from 3- or 5-V power supplies. It functions throughout the industrial temperature range (-40 degrees C to +85 degrees C) and is available in 20-pin TSSOP package. Pricing is set at $2.43 each in quantities of 1,000.