Control Chip

N/AS1846 NV Tri-Potentiometer, Memory and MicroMonitor, a highly integrated chip that enhances laser control and design flexibility in optical transceiver modules. The chip combines three linear taper potentiometers with nonvolatile memory and a CPU supervisor in reduced TSSOP packaging.

Digital potentiometers are used to control bias voltages and current to laser diodes in optical transceiver modules. Nonvolatile memory is required to configure and store application-specific calibration data and to control wiper settings for each potentiometer, with space available for user-specific data. The device's on-chip micromonitor tracks parameters critical to processor 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.

Optical transceivers are typically located in the electrical backplane of routers or networking hubs or on a server's motherboard. The chip is designed as a control device for optical transceivers in gigabit Ethernet, fiber channel and SONET applications.

The chip communicates via a standard 2-wire interface and operates from 3V or 5V power supplies. It functions throughout the industrial temperature range (-40°C to +85°C).

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