Description

The H2A408G1666C is a high speed Double Date Rate 3 (DDR3) low voltage Synchronous DRAM fabricated with ultra high performance CMOS process which organized as 64Mbits x 8 banks by 16 bits.
This synchronous device achieves high speed double-data-rate transfer rates of up to 1866 Mb/sec/pin (DDR3-1866) for general applications.
The chip is designed to comply with the following key DDR3 SDRAM features:

• posted CAS with additive latency,
• write latency = read latency -1,
• On Die Termination,
• programmable driver strength data,
• seamless BL4 access with bank-grouping.

All of the control and address inputs
are synchronized with a pair of externally supplied differential clocks. Inputs are latched at the cross point of differential clocks (CK rising and /CK falling).
All I/Os are synchronized with a pair of bidirectional differential data strobes (DQS and /DQS) in a source synchronous fashion. The address bus is used to
convey row, column and bank address information in a /RAS and /CAS multiplexing style.