Products

Integrated Circuits

Flash devices require single 2.7V supply. Three flash-memory devices operate from a 2.7 to 3.6V power supply, allowing portable systems to operate longer between battery recharging cycles. The Am29LV008 stores 8 Mbits, configured as 1M38 bits. The Am29-LV004, a 4-Mbit device, is configured as 512k38 bits. Another 4-Mbit device, the Am29LV400 offers either 256k316- or 512k38-bit organization. Power-management functions include low-power standby and an automatic sleep-mode current of <1 mA. The 120-nsec TSOP versions of the Am29LV008, Am29-LV004, and Am29LV400 cost $19.30, $11.90, and $11.90, respectively (10,000). Ad-vanced Micro Devices Inc, Sunnyvale, CA. (408) 749-5703.

Power-supply controller delivers triple output. The L4992 triple power-supply-controller IC integrates the peripheral functions for power management in notebook computers and other portable equipment. The 32-pin TQFP includes PWM switch-mode power-supply controllers rated for 3.3 and 5.1V, along with a 12V linear regulator. The switching regulators operate at 200 or 300 kHz using an internal oscillator or, at higher frequencies, with an external synchronization source. Synch- ronous rectification and a selectable pulse-skipping mode enable efficient operation over a wide load range, including very light loads. The part costs $4.20 (25,000). SGS-Thomson Microelectronics, Lincoln, MA. (617) 259-0300.

32-bit-wide SRAMs ac-cess in 12 nsec. The SYS32256 and SYS32128 32-bit-wide SRAM modules, configured respectively as 256k332 and 128k332 bits, offer access times from 12 to 45 nsec in both ZIP and SIMM formats. Both modules comply with JEDEC pinout and physical standards. Low-power versions feature a low-voltage data-retention mode. The devices have output enable, write enable, and four chip-select pins. The 12-nsec SYS32128 costs $130; the SYS32256 in the same speed costs $235 (1000). Syntaq Technology Inc, San Diego, CA. (619) 271-4947.

Speech-recognition IC is 99% accurate. Responding to sets of one to 60 words, the Voice Direct speaker-dependent speech chip recognizes spoken words with >99% accuracy. You can train the chip to recognize words and phrases by repeating each word twice. Internal programming is unnecessary. Input pins or instructions from an external mC control the ASIC device. Off-chip SRAM or EEPROM store speech templates. Voice Direct costs $5 (100,000). Sensory Circuits Inc, San Jose, CA. (408) 452-1000.

16-Mbit SRAMs operate over military temperature range. Organized as 512k332 bits, the high-speed EDI8M32512CA and low-power EDI8M32512C SRAM modules come in 66-pin PGAs that measure 1.3831.38 in. Each module contains four 512k38-bit ceramic SOJs on a ceramic PGA substrate. The ceramic SOJs comply with MIL-PRF-38535 standards, and module specifications are guaranteed over the military operating-temperature range of –55 to +1258C. The high-speed part has access times of 20 to 55 nsec, and the low-power module offers access times of 70 to 100 nsec. The 20-nsec EDI8M32512CA costs $1250; the 70-nsec EDI8M32512C costs $980 (100). Electronic Designs Inc, Westborough, MA. (508) 366-5151.

Reference report spotlights memory ICs. "Memory 1996," an in-depth reference publication on dynamic RAM, static RAM, EPROM, and flash-memory ICs, covers technology and market research trends through 2001. The report provides an appendix of memory-IC products, profiling >50 vendors, and presents dollar, unit, and average-selling-price forecasts. The 300-pg document costs $1350. A CD-ROM version is also available for the same price. Integrated Circuit Engineering Corp, Scottsdale, AZ. (602) 368-8260.

Buck-converter ICs suit P55C motherboards. Two synchronous, half-bridge buck converters for Pentium P55C motherboards each provide two 7A n-type MOSFETs, a half-bridge driver, and synchronous control logic on a die. The HIP5015, with noninverting PWM input for multiple-controller support, and the HIP5016, with inverting PWM input, allow rapid development of 1-MHz step-down converters to maintain regulation during rapid current swings of >4A that occur during power-management-mode switches. The HIP5015 and HIP5016 come in seven-pin SIPs and cost $2.25 (OEM). Harris Semiconductor, Melbourne, FL. (800) 442-7747, ext 7584.

8-Mbit SGRAM family has high bandwidth. A trio of synchronous graphic-memory devices targets applications that require very large memory bandwidth. The 8-Mbit MB81G83222 contains dual 128k332-bit memory banks and runs on a single 3.3V power supply. The device comes in three versions, with different clock speeds and access times. Operating as fast as 100 MHz, the 010 version has an access time of 9 nsec. The 84-MHz 012 version accesses in 11 nsec, and the 67-MHz 015 version accesses in 12 nsec. Samples of the MB81G83222 come in 100-pin PQFPs and cost $25 (1000). Fujitsu Microelectronics Inc, San Jose, CA. (408) 922-9000.

5V flash SIMMs store as much as 32 Mbytes. Flash-memory modules in 8-, 16-, and 32-Mbyte densities need a single 5V supply for both read and write functions. The 80-pin SIMMs have a 32-bit-wide organization and JEDEC-standard pinouts. Maximum access time is 90 nsec. The plug-in modules, which measure 1.20-in. high, 4.7-in. long, and 0.10-in. thick, guarantee a minimum of 100,000 write/ erase cycles. Prices start at <$200 for the 8-Mbyte device, $400 for the 16-Mbyte version, and $800 for the 32-Mbyte part (100). White Microelectronics, Phoenix, AZ. (602) 437-1520.

3A linear regulator boasts low dropout, fast recovery. Intended for bus regulation, the UC382's fast transient response allows a 12-mV output voltage change with a 3A/msec output current transient. Additionally, the linear regulator's low dropout voltage of 450-mV maximum at an output current of 3A reduces power dissipation and system-cooling requirements under high load-current conditions. The UC382 comes in four output-voltage versions: adjustable and 2.5, 2.1, and 1.5V. In TO-220 or TO-263 packages, the regulator costs $3.40 (1000). Unitrode Corp, Merrimack, NH. (603) 424-2410.

ASICs' 3V I/Os are 5V-tolerant. This second-generation family of 0.5-mm ASICs offers higher densities than the first-generation devices, along with 5V-tolerant 3V buffers, providing a flexible alternative to the mixed 3 and 5V capabilities. The MSM30R/32R/92R series furnishes as many as 724,000 usable gates, plus PECL and GTL+ I/O interfaces. Both two- and three-layer metal options are available. Devices come in plastic QFPs and BGAs, costing approximately $0.015/gate in the QFP. Oki Semiconductor, Sunnyvale, CA. (800) 654-6388.

ATM SAR chip handles ABR instructions. Built with a 33-MHz, 32-bit PCI- bus interface, the ATMizer II ATM segmentation and reassembly (SAR) engine provides available bit rate (ABR) management, as well as full-duplex operation at 155 Mbps. The IC addresses the latest ATM Forum traffic management requirements through its flexible software management, custom ABR floating-point instructions, and ample processing power. You can accommodate future changes to the ATM Forum specifications with software upgrades. The ATMizer II costs $99 (OEM). LSI Logic Corp, Milpitas, CA. (408) 433-7700.