gate array


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gate array

A type of ASIC chip that is partially finished with rows of the transistors and resistors built in but unconnected. The chip is completed by designing and adhering the top metal layers that provide the interconnecting pathways. These final masking stages are less costly than designing a full custom chip from scratch, which requires a new photo-mask for every transistor and interconnection layer.

The gate array is made up of "basic cells," each cell containing some number of transistors and resistors depending on the vendor. Using a cell library (gates, registers, etc.) and a macro library (more complex functions), the customer designs the chip, and the vendor's software generates the interconnection masks. Some cells go wasted on gate array designs, which is the penalty for having fixed locations for everything. See PLD, ASIC, hard macro and soft macro.


Gate Array Cells
These are examples of basic cells used in gate arrays. One uses CMOS logic only (NMOS and PMOS transistors), while the other adds bipolar transistors for higher output power.
References in periodicals archive ?
Dataquest, a San Jose-based market research firm, projects that in 1995 the gate array segment of the worldwide MOS ASIC market will reach $5 billion.
The founder and former CEO of California Devices, he is widely recognized as the inventor of the Sea-of-Gates architecture, which has become a standard for gate array companies worldwide.
This press release contains forward-looking statements including, but not limited to, statements regarding the performance and achievements of Synplicity's Synplify ASIC software designed for NEC Electronics' Gate Array products.
Faster Time to Market for NEC Electronics' Gate Arrays
Extending the life of LSI's CMOS ASIC gate array products can save customers the cost of having to re-design or rely on suspect parts from unauthorized sources," said Paul Gerrish, co-president at Rochester Electronics.
com)-- Rochester Electronics, the world's largest authorized manufacturer and distributor of end-of-life and mature semiconductors, is providing continuing manufacturing services of LSI Corporation's entire HCMOS (high-speed complementary metal-oxide semiconductor) ASIC (application-specific integrated circuits) gate array product offering.
As a leading gate array supplier for 25 years, and the number one supplier since 1993, NEC Electronics can manufacture engineering samples in as few as 9 calendar days from product tape-out, with mask charges starting as low as $10,000 and unit costs starting below $1 in volume quantities.
Original equipment manufacturers (OEMs) across the Globe are increasingly moving away from application-specific integrated circuits towards field programmable gate arrays to reduce the time to market
NEC Electronics' gate array portfolio enhances Avnet's current offering in ASIC technologies," said Rafael Cruz, vice president of Engineering Services for Avnet Electronics Marketing.
Structured ASIC is an exciting evolution that was brought about by the soaring costs of cell-based ASIC and the inability of field programmable gate arrays (FPGA) to match the performance, size, and power dissipation characteristics required by numerous applications," says Frost & Sullivan Research Analyst Swaminathan Srinivasan.
Atmel currently manufactures PAL-type devices, two families of user- programmable arrays, one offering speed and the other offering complexity and two families of gate arrays.
The ViaMask architecture fills the growing gap between field-programmable gate arrays (FPGAs) and increasingly costly and complex standard cell application-specific integrated circuits (ASICs).