Renesas Technology Announces Industry's First Reset IC That Sequences Power Turn-On for Dual-Power-Supply (3.3V/1.8V) Microcontrollers.SAN JOSE San Jose, city, United States San Jose (sănəzā`, săn hōzā`), city (1990 pop. 782,248), seat of Santa Clara co., W central Calif.; founded 1777, inc. 1850. , Calif. -- Device Prevents System Runaway Caused by Improper Power Sequencing and Helps Shorten (audio, compression) Shorten - A form of lossless audio compression. System Development Time by Eliminating Need for Power-On Timing Design Renesas Technology Renesas Technology Corporation (ルネサス テクノロジ| America, Inc. today announced the RNA RNA: see nucleic acid. RNA in full ribonucleic acid One of the two main types of nucleic acid (the other being DNA), which functions in cellular protein synthesis in all living cells and replaces DNA as the carrier of genetic 50C27AUS AUS abbr. Army of the United States , the industry's first reset IC that incorporates a core power-on control function for microcontrollers that operate core logic circuits from a 1.8V power supply and input/output (I/O (Input/Output) The transfer of data between the CPU and a peripheral device. Every transfer is an output from one device and an input to another. See PC input/output. I/O - Input/Output ) peripheral circuits from a 3.3V supply. The new reset IC eliminates the complicated power-on timing aspect of power-supply system design needed to prevent these dual-power-supply microcontrollers from going into a runaway (fault) condition. It simplifies the electronics by eliminating the external transistor switch and timing circuit that would be necessary if a traditional reset IC was used. Also, the RNA50C27AUS helps ensure reliable system operation by monitoring both supply voltages and generating a reset if either one falls below a critical level. Finally, the device eases system design by providing a control function for turning the core power supply on or off. To ensure proper operation, the 1.8V and 3.3V supplies of dual-power-supply microcontrollers must be turned on in the proper sequence -- first the 1.8V supply, then the 3.3V supply -- and then only when those supply voltages are above critical thresholds Critical threshold, a notion derived from the percolation theory, refers to a threshold, that summons up to a critical mass. Under the threshold the phenomenon tends to abort, above the threshold, it tends to grow exponentially. . Further, after a system reset is initiated, the release time of that signal must be at least a certain minimum length, a time delay that is determined by the application. The new RNA50C27AUS reset IC delivers all these capabilities and more. The device's external resistor resistor, two-terminal electric circuit component that offers opposition to an electric current. Resistors are normally designed and operated so that, with varying levels of current, variations of their resistance values are negligible (see resistance). and capacitor capacitor or condenser, device for the storage of electric charge. Simple capacitors consist of two plates made of an electrically conducting material (e.g., a metal) and separated by a nonconducting material or dielectric (e.g. determine the reset signal release time. The reset output signal has fast (10ns) rise and fall times. To accommodate different applications, an open-drain output or CMOS (Complementary Metal Oxide Semiconductor) Pronounced "c-moss." The most widely used integrated circuit design. It is found in almost every electronic product from handheld devices to mainframes. output can be selected for the reset output signal. Using the CMOS output allows a direct connection to a microcontroller's reset pin. The precision with which the dual-voltage reset IC detects abnormalities in the voltages of the core and I/O power supplies is +/-1 percent (maximum) -- the same high degree of precision provided by conventional reset ICs. Package for the RNA50C27AUS is an 8-pin SSOP-8 with a small body size (2.2mm x 2.4mm, excluding pins) and lead-free specifications. Pricing and Availability ---------------------------------------------------------------------- Product Name Package Sample Price/Availability ---------------------------------------------------------------------- RNA50C27AUS 8-pin SSOP (2.2mm x 2.4mm) $0.7/Now ---------------------------------------------------------------------- Reader Contact Readers can find additional product and contact information on the Renesas Technology Web site at www.renesas.com. About Renesas Technology Corp. Renesas Technology Corp. is one of the world's leading semiconductor system solutions providers for mobile, automotive and PC/AV (Audio Visual) markets and the world's No.1 supplier of microcontrollers. It is also a leading provider of LCD (Liquid Crystal Display) A display technology that uses rod-shaped molecules (liquid crystals) that flow like liquid and bend light. Unenergized, the crystals direct light through two polarizing filters, allowing a natural background color to show. Driver ICs, Smart Card microcontrollers, RF-ICs, High Power Amplifiers Power amplifier The final stage in multistage amplifiers, such as audio amplifiers and radio transmitters, designed to deliver appreciable power to the load. , Mixed Signal ICs, System-on-Chip (SoC), System-in-Package (SiP) and more. Established in 2003 as a joint venture between Hitachi, Ltd. (TOKYO:6501)(NYSE NYSE See: New York Stock Exchange :HIT) and Mitsubishi Electric Mitsubishi Electric Corporation (三菱電機株式会社 Corporation (TOKYO:6503), Renesas Technology achieved consolidated revenue of 906 billion JPY JPY In currencies, this is the abbreviation for the Japanese Yen. Notes: The currency market, also known as the Foreign Exchange market, is the largest financial market in the world, with a daily average volume of over US $1 trillion. in FY2005 (end of March 2006). Renesas Technology is based in Tokyo, Japan and has a global network of manufacturing, design and sales operations in around 20 countries with about 26,200 employees worldwide. For further information, please visit http://www.renesas.com. Note to Editors: A specification summary is included in this release. Product names, company names, or brands mentioned are the property of their respective owners.
Specifications: Renesas Technology RNA50C27AUS Dual-voltage Reset IC
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Item RNA50C27AUS
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Detection voltage 2.7V (I/O power supply side), 0.85V
(core power supply side)
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Detection voltage precision +/-1% (max.) (I/O power supply side)
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Detection voltage temperature +/-100 ppm/degrees C (typ.) (I/O power
coefficient supply side)
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Detection voltage hysteresis 5% (typ.) (I/O power supply side)
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Current dissipation 3.5uA (typ.)
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Output form Open-drain output or CMOS output,
selectable
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On-chip functions -- Core power supply side power on/off
control function
-- Reset release timing delay function:
Freely settable with external
capacitance and resistance
-- Manual reset function: Externally
controllable
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Operating temperature range -40 to +85 degrees C
(Topr)
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Production process 0.8um CMOS
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Package SSOP-8
-- Body size: 2.2mm x 2.4mm x 0.8mm
(max.)
-- Lead-free
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