CAMPBELL, CA -- December 04, 2000 -- Summit Microelectronics Inc. has introduced three compact environmental monitors that autonomously oversee and measure voltages, currents, temperature and airflow in as many as three analog input channels on telecommunications line cards. Once programmed at start-up, the SMD1102, SMD1103 and the SMD1113 notify the host microprocessor if any input signal moves beyond its user-specified limits.

The three devices each contain a 2- or 3-channel, 10-bit data acquisition system to monitor and measure programmable limits (under, over, and window) at specified sampling intervals. The SMD1102 has a 2-channel analog input, and the SMD1103 and SMD1113 each have 3-channel inputs. Operating autonomously, the devices select, convert and compare the pre-set limits to ensure conformance to the pre-determined limits. Featuring an on-board EEPROM, the devices can also be programmed to provide separate alerts and limits. In this way, the SMD1102, SMD1103 and SMD1113 can predict possible faults before they occur, thereby extending telecommunications system performance into carrier-class levels known as "five nine's", or 99.999% reliability.

The SMD1102 has an external voltage reference input provided for absolute measurements, and the SMD1113 has additional address pins for device selection, which in a rack enclosure would allow multiple devices to be distributed on individual cards, but only require two pins on the backplane for the serial data bus.

Operating over an industry-standard I2C two-wire interface, the SMD1102, SMD1103 and SMD1113 can be programmed into auto-monitor mode. The devices can then successively monitor each of their two or three channels against associated values logged in two non-volatile registers. In the event of an input signal moving into one of the alert regions, the device will generate an interrupt on its SMB Alert pin. Using the two-wire interface, the host processor can interrogate the bus to determine which device generated the alert.

Using a supply voltage range of 2.7V to 5V, the devices also feature a very low quiescent current of 25m A, making the devices appropriate non telecom line card for battery-powered applications. Between analog-to-digital conversions, quiescent current falls to around 25m A and, when operating from a 2.7V supply, active current draw is 1.2mA at 40ksps.


Availability and Pricing

All three devices are available today in volume-production quantities. By integrating functionality, both these devices feature a small footprint that increases space on the line card for other additional features. The SMD1102 and the SMD1103, which is are both available as an 8-pin SOIC or as an 8-pin PDIP. Both devices are priced at $7.00 each in quantities of 1,000 units or more. The SMD1113 is available as a 14-pin SOIC and is priced at $7.20 each in quantities of 1000 devices.


A complete design tool kit containing GUI software to create what Summit calls a "30-second ASIC", a programming interface cable kit, and other software can also be downloaded directly from Summit's website, www.summitmicro.com


About Summit -- Power Management for Communications

Summit Microelectronics Inc. develops semiconductors that manage the power functions in communications system equipment. Using Summit's proprietary technology, customers can achieve carrier-class availability, the highest standard of reliability available today for telecommunications, data communications and Internet applications.

Founded in 1997, Summit is headquartered in Campbell, California. The Company is ISO 9001 certified and is in the process of gaining ISO 14000 and STACK certification. Summit's website is www.summitmicro.com.

Summit Microelectronics, Inc.
1717 Fox Drive
San Jose, CA 95131-2312
Tel: +1.408-436-9890
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