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Description

The Hynix H57V2622GMR Synchronous DRAM (Dual Die) ideally suited for the consumer memory applications which requires large memory density and high bandwidth uses Hinix’s 128Mb SDR monolithic die and has similar functionality.

Synchronous DRAM is a type of DRAM which operates in synchronization with input clock. The Hynix Synchronous DRAM latch each control signal at the rising edge of a basic input clock (CLK) and input/output data in synchronization with the input clock (CLK). The address lines are multiplexed with the Data Input/ Output signals on a multiplexed x32 Input/ Output bus. All the commands are latched in synchronization with the rising edge of CLK.

 

The Synchronous DRAM provides for programmable read or write Burst length of Programmable burst lengths: 1, 2, 4, 8 locations or full page. An AUTO PRECHARGE function may be enabled to provide a self-timed row precharge that is initiated at the end of the burst access. The Synchronous DRAM uses an internal pipelined architecture to achieve high-speed operation.

 

This architecture is compartible with the 2n rule of prefetch architectures, but it also allows the column address to be changed on every clock cycle to achieve a high-speed, fully random access. Precharging one bank while accessing one of the other three banks will hide the precharge cycles and provide seamless, high-speed, randon-access operation.Read and write accesses to the Hynix Synchronous DRAM are burst oriented; accesses start at a selected location and continue for a programmed number of locations in a programmed sequence. Accesses begin with the registration of an ACTIVE command, which is then followed by a READ or WRITE command. The address bits registered coincident with the ACTIVE command are used to select the bank and the row to be accessed. The address bits registered coincident with the READ or WRITE command are used to select the bank and the starting column location for the burst access. A burst of Read or Write cycles in progress can be terminated by a burst terminate command or can be interrupted and replaced by a new burst Read or Write command on any cycle(This pipelined design is not restricted by a 2N rule).All inputs are LVTTL compatible. Devices will have a VDD and VDDQ supply of 3.3V (nominal).

 

Features

    • Standard SDRAM Protocol
    • Uses 2pcs of 128Mb Monolithic Die
    • Power Supply Voltage : VDD = 3.3V, VDDQ = 3.3V
    • All device pins are compatible with LVTTL interface
    • 4096 Refresh cycles / 64ms
    • Programmable CAS latency of 2 or 3
    • Programmable Burst Length and Burst Type
    • Operating Temp.
      - Commercial Temp. : 0oC ~ 70oC
      - Industrial Temp. : -40oC ~ 85oC
    • This product is in compliance with the directive pertaining of RoHS.

Ordering Information

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