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Lattice adds precision power manager

Posted: 28 Feb 2005 ?? ?Print Version ?Bookmark and Share

Keywords:lattice semiconductor? software? power1208p1? precision power manager ic? ic?

Lattice Semiconductor's software configurable Power1208P1 Precision Power Manager IC, an extension of the company's isppac Power Manager programmable mixed-signal product family, is designed to provide power sequencing of up to 8 supplies and monitoring of up to 12 supplies through an optimized set of programmable analog and digital functions.

"Managing today's power supply voltages with greater precision can only be achieved by using mixed-signal devices with higher accuracy," said Stan Kopec, VP of corporate marketing. "With the addition of the Power1208P1 device, designers can now employ our standardized power management approach that includes PCBs that use power supplies of 1.2V or less."

The Power1208P1 features 12 analog power monitor inputs. Each analog input has programmable threshold (384 steps) synchronous comparators with a fault detection precision of 0.5 percent. The chip also includes an 80mV near-ground threshold for detecting power-off conditions. The device can monitor a supply's output down to 0.7V. Input comparator thresholds and digital functions such as supply control sequences are programmed into non-volatile E?CMOS elements on the devices using an IEEE1149.1 boundary scan protocol.

The 1208P1 has on-chip programmable voltage references for supply monitoring, four noise-immune digital inputs and four open-drain digital outputs for system control interfacing, four programmable timers with an on-chip 1 MHz oscillator for delay control, and a 16 macrocell Complex PLD (CPLD) to implement sequencing and control functions. The Power1208P1 is ruggedized to operate reliably in noisy power supply environments from 2.7V to 5.5V.

The power manager chip is supported by the latest version PAC-Designer software, an intuitive schematic design entry and simulation tool. Complex sequencing and monitoring functionality can be efficiently designed through easy-to-use pull-down menus in PAC-Designer's LogiBuilder module. The latest version of the tool features a new and improved instruction set that enables the user to implement complex functionality more efficiently. Designs can be completely verified using the tool's built-in waveform simulator. The PAC-Designer software is available for download from the company's website.

The Power1208P1 device, in a 44-pin TQFP (industrial temperature grade, -40C to 85C) that's pin-compatible with the company's existing Power1208, is priced beginning at $9.95 in 10,000 quantities. An evaluation kit, the PACsysPOWR1208P1 (includes board, cable and PAC-Designer v. 3.3 software), is available through authorized company distributors or from the company's website at a price of $149.

- Vincent Biancomano


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