ISSI ANNOUNCES 64Mb and 32Mb Pseudo SRAMs

By: Allyanz  05-Apr-2012

Integrated Silicon Solution, Inc., a leader in advanced memory solutions, has added 64Mb and 32Mb density devices to their line of Pseudo SRAMs. These new devices add to the previously released 4Mb and 8Mb parts, and give the design engineer a wide range of densities from which to choose to best fit the application's requirements. These PSRAMs are designed to provide the characteristics and ease of use of an SRAM, but with the improved density and cost reduction associated with using a DRAM.

The 64Mb is organized as 4Mx16 and the 32Mb is 2Mx16. The IS66WVE2M16ALL/BLL and the IS66WVE4M16ALL/BLL are the 1.8V and 3.3V options of the asynchronous solution for this product family. The IS66WVC2M16ALL, IS66WVD2M16ALL, IS66WVC4M16ALL and the IS66WVD4M16ALL are the CRAM 1.5 and CRAM 2.0 options of this product family. As such, this product line provides the designer with a variety of high density, cost effective, low power memory solutions.

In these products, refresh of the DRAM cells is handled internally, eliminating the need for an external refresh controller. Partial Array Refresh (PAR), low standby current and Deep Power Down (DPD) modes of these products makes it ideal for low power applications. The CRAM 1.5 option adds the synchronous / burst interface mode, an on-die temperature sensor for temperature compensated refresh (TCR), fixed latency, and drive strength control for the outputs. In addition to the CRAM 1.5 feature set, CRAM 2.0 adds a multiplexed address and data bus for reduced pin count.

This cost effective, low power, high density memory combined with extended temperature, and options that include the Know Good Die (KGD) format make the product line perfect for wireless, industrial, embedded, and automotive applications.

For more details on these new Pseudo SRAMS from ISSI, please


Contact Allyanz

Email - none provided

Print this page

Other news and updates from Allyanz


ZamLock Secure Flash Drive for rugged Industrial and Military Applications

While maintaining the unparallel hardware authentication and encryption standard in all Zamlock drives, the ruggedised Zamlock Pro is designed with the mobile workforce in mind. PIN-pad protection makes drive impervious to computer/Internet based hacking attempts since drive is not mounted until correct PIN is entered. ZamLock Pro the only secure memory storage device that balances security.



MachXO2 ZE devices range from 256 to 7K look-up tables, operate off a nominal 1.2V power supply, and support system performance up to 60MHz. Which offers designers of low-density PLDs an unprecedented mix of low cost, low power and high system integration in a single device. Customers can start designing with MachXO2 devices today using Lattice Diamond.


ISSI adds 256Mb DDR2 SDRAM to portfolio, targeted for Automotive, Networking, Telecom, and Industrial Applications

DDR2 SDRAMs are used in a variety of applications including automotive telematics and infotainment, networking/telecom access nodes, VoIP, switches, routers, and packet optical transport, plus many industrial applications. Samples and volume production support for the 8Mx32, IS43DR32800A and the IS43DR32801A are available now. This expansion of the DDR2 SDRAM product family adds to ISSI's already extensive offering of SDR.



The power management section consists of a programmable threshold, precision differential input comparator block with an accuracy of 0.7%, a 48-macrocell CPLD, programmable hardware timers, a10-bit analog to digital converter and a trim block for the trimming and margining of supplies.



On-chip termination not only eliminates components, simplifies PCB design and reduces system BOM, but also improves overall signal integrity and EMI emissions. The solution is based on Micrel's enhanced mixed-signal design which enables power consumption to be reduced by half compared to the prior generation. These devices provide the MII or RMII interface to transmit and receive data over standard CAT-5 unshielded twisted pair cable or fiber.