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CAMPBELL,
CA -- March 15, 1999 --
Summit
Microelectronics has added a trio of programmable
voltage supervisory circuits to its product
portfolio that offer, for the first time in the
semiconductor industry, quick-turn
customer-specified reset points as well as on-board
memory.
The
three members of the family -- the SMS2902,
SMS2904
and SMS2916
-- monitor the system supply voltage and generate
active-high and active-low reset outputs if that
voltage falls below the specified level. There are
three standard reset, or Vtrip, levels that can be
ordered by the customer. However, if these levels
do not meet the application requirements, the Vtrip
point can be specified by the customer and
programmed by Summit during the final test
phase.
The
range of selectable voltages is 4.0V to 5.0V in
50mV increments and 2.3V to 3.0V in 30mV
increments. The Vtrip level is accurate to
+1% over the industrial operating
temperature range.
All
three parts also incorporate a watchdog timer that
monitors the proper operation of the
microprocessor. If a fault should occur that sends
the microprocessor into an endless loop, the
watchdog will reset the system. The watchdog timer
has a default timeout setting of 1.6
seconds.
"Precision
voltage supervisory circuits are critical elements
in today's embedded controller designs," explained
Richard Palm, Summit's vice president of marketing.
"With multiple microcontrollers and ASICs per
board, each potentially with a different voltage
operating range, it is imperative that the
components are placed in a known reset state at the
optimum Vtrip point," added Palm. "This is mixing
technologies at its best. For example, mixing
micros from Intel and ASICs from Xilinx and each
operating optimally at different
voltages."
The
three different circuits also contain 2K, 4K and
16K bits of EEPROM memory. The interface to the
memory is via an industry standard two-wire serial
interface. The memories have page-write capability,
are designed for a minimum of 1,000,000 write
cycles (per byte) and have a data retention
guarantee of 100 years.
"This
extra memory -- or free E2 -- gives
designers the capability to reduce system component
counts, costs and improve reliability," Palm
said.
The
SMS2902,
SMS2904
and SMS2916
are available for operation over the full
industrial temperature range of -40 to +85 degrees
Centigrade. The circuits are available in
surface-mount SO-8 and 8-pin PDIP packages. Prices
start at $1.73 in 1,000-unit quantities for the
SMS2902,
$1.93 for the SMS2904
and $2.07 for the SMS2916.
Summit
specializes in programmable analog circuits using
electrically erasable programmable read-only memory
(EEPROM) technologies to provide cost-effective
solutions to a variety of applications in the
telecommunications markets. These EEPROM memory
bits are used for product configuration and
trimming of the analog circuits. The Company is
currently marketing four different families that
use the programmable analog circuits;
microprocessor supervisors, Nonvolatile DACs, hot
swap Controllers and Nonvolatile Data Acquisition
Systems. Several of these circuits offer extra
EEPROM cells that can be used for any system memory
function.
Press
Contacts:
Rick Orlando, President & CEO: (408)
378-6461,
Rich
Palm, Vice President of Marketing: (408) 378-6461,
###
Summit
Microelectronics, Inc.
1717 Fox Drive
San Jose, CA 95131-2312
Tel: +1.408-436-9890
Email:
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