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Summit Introduces New Precision Supply-Voltage Monitor and Reset Controller Family with Watchdog Timer |
Summit
Introduces
New Precision Supply-Voltage Monitor and Reset Controller
Family with Watchdog Timer
FOR
IMMEDIATE RELEASE
SARATOGA,
CA -- Monday, October 13, 1997 Includes
4K of Corruption-Free E2PROM Memory with
Microwire Plus Interface Semiconductor
manufacturer Summit Microelectronics today
introduced a six-device family of mixed-technology
analog and non-volatile memory circuits that
provide stability in un-stable power situations and
prevent the corruption of data in
microcontroller-based systems that use a microwire
bus interface. The
six circuits new circuits from Summit integrate a
precision reset controller and 4K- bits of
electrically erasable programmable read-only memory
(EEPROM). This is the third group of
mixed-technology memories , all improved with
on-board analog circuitry, that Summit has
introduced in the past five months. The first
device set was EEPROMs with a limited on-board
precision reset controller, while the second family
featured a more highly integrated reset controller
function with an industry standard 2K and 4K 2-wire
serial EPROM. The
three pairs of new Summit memory devices all
provide disabling and precision reset control for
embedded microcontroller systems, which is a
critical factor during power-up, power-down or
supply voltage brown-out situations. "Even when
this function is provided as an external circuit it
will generally only impact the microcontroller and
may even produce a failure situation," explained
Rich Palm, Summit's Vice President of Marketing.
All three of the new Summit circuits can be
programmed to shutdown or disable the memory or the
memory and microcontroller at either 2.7 volts,
4.25 volts or 4.5 volts. "On-chip
system disabling and appropriate precision reset
control prevents unreliable operation, lock-up
problems, the execution of unintended routines or
data corruption," Palm said. "Precision reset
controllers are critical elements for embedded
control design, and when they are included on the
chip with the memory they reduce system component
counts, costs and improve reliability," Palm
added. The
newly introduced combination memory and analog
circuits feature an industry-standard, microwire
interface operating up to 400KHz clock frequency
for the 5-volt device and 100KHz for the 3-volt
device. The devices in this new group
are: Device Memory Feature
Description Format Reset
Options S93VP662 Voltage
Protection Circuit S93VP663 Voltage
Protection Circuit S93662 Precision
Reset Controller S93663 Precision
Reset Controller S93WD662 Precision
Reset Controller with watchdog
timer S93WD663 Precision
Reset Controller with watchdog
timer The
4K EEPROM memory element within each of the devices
is perfectly compatible with either 8-bit or 16-bit
system implementations. The memory is accessible
via the industry-standard microwire bus. The
memories have page-write capability, are designed
for a minimum of 100,000 program/erase cycles and
have a data retention guarantee of 100
years. The
S93VP662/3
is the simplest of the three new pairs of circuits.
These devices can disable a system's write
operations as voltage falls below one of the three
pre-selected levels, thus making sure that
additional data that could be corrupted is not
forwarded to the system's memory. The Vcc lockout
feature guarantees a higher level of data integrity
than can be expected from industry-standard devices
that have either a very loose specification or no
Vcc lockout feature at all. The
S933662/3 pair provides the same memory cutoff
functions as the S93VP662/3,
and in addition provides cutoff and precision reset
capability for the microcontroller. This device can
provide reset for either active high or active low
reset microcontrollers, adding great flexibility
for those systems where more than one type of
microcontroller is used. The
third device pair, the S93WD662/3,
adds a watchdog timer to the S933662/3 devices. The
watchdog, or microcontroller supervisory circuit,
adds another level of security to
microcontroller-based systems making sure that the
system is properly executing its code. The watchdog
timer in each of the devices has a nominal time-out
value of 1.6 seconds. All
six devices are available in 8-lead PDIP or 8-lead
SOIC packages. Prices for devices specified for
5-volt operation in quantities of 10,000
are: S93VP662/3 S93662/3 S93WD662/3 Summit
Microelectronics, Inc. focuses on the integration
of analog and EEPROM technologies to provide
cost-effective solutions to a variety of
applications in the telecommunications, consumer
and automotive markets. Its website is
www.summitmicro.com.
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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