HY57V56420C(L)T
4 Banks x 16M x 4Bit Synchronous DRAM
This document is a gene ral product description and is subject to change without notice. Hynix Semiconductor Inc. does not assume any responsibility for
use of circuits described. No patent licenses are implied.
Rev. 0.4 / July 2003 1
DESCRIPTION
The HY57V56420C is a 268,435,456bit CMOS Synchronous DRAM, ideally suited for the main memory applications which require large
memory density and high bandwidth. HY57V56420C is organized as 4banks of 16,777,216x4.
HY57V56420C is offering fully synchronous operation referenced to a positive edge of the clock. All inputs and outputs are synchronized
with the rising edge of the clock input. The data paths are internally pipelined to achieve very high bandwidth. All input and output voltage
levels are compatible with LVTTL.
Programmable options include the length of pipeline (Read latency of 2 or 3), the number of consecutive read or write cycles initiated by
a single control command (Burst length of 1,2,4,8 or full page), and the burst count sequence(sequential or interleave). 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.)
FEATURES
• Single 3. 3±0.3V power supply
• All device pins are compat i b l e w it h LVTT L interface
• JEDEC standard 400mil 54pin TSOP-II with 0.8mm of pin
pitch
• All inputs and outputs referenced to positive edge of system
clock
• Data mask function by DQM
• Internal four banks opera ti on
• Auto refresh and self refresh
• 8192 refresh cycles / 64ms
• Programmable Burst Length and Burst Type
- 1, 2, 4, 8 or Full page for Sequential Burst
- 1, 2, 4 or 8 for Interleave Burst
• Programmable CAS Latency ; 2, 3 Clocks
ORDERING INFORMATION
Part No. Clock Frequency Power Organization Interface Package
HY57V56420CT-6 166MHz
Normal
4Banks x 16Mbits x 4 LVTTL 400mil 54pin TSOP II
HY57V56420CT-K 133MHz
HY57V56420CT-H 133MHz
HY57V56420CT-8 125MHz
HY57V56420CT-P 100MHz
HY57V56420CT-S 100MHz
HY57V56420CLT-6 166MHz
Low power
HY57V56420CLT-K 133MHz
HY57V56420CLT-H 133MHz
HY57V56420CLT-8 125MHz
HY57V56420CLT-P 100MHz
HY57V56420CLT-S 100MHz