AS4C256M16D3
4Gb (256M x 16 bit) DDR3 Synchronous DRAM (SDRAM)
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Features
(Rev. 3.0 Aug. /2014)
Overview
JEDEC Standard Compliant
The 4Gb Double-Data-Rate-3 DRAMs is double data
rate architecture to achieve high-speed operation. It is
internally configured as an eight bank DRAM.
The 4Gb chip is organized as 32Mbit x 16 I/Os x 8
bank devices. These synchronous devices achieve high
speed double-data-rate transfer rates of up to 1600
Mb/sec/pin for general applications.
The chip is designed to comply with all key DDR3
DRAM key features and 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 differential DQS
pair in a source synchronous fashion.
Power supplies: VDD & VDDQ = +1.5V 0.075V
Operating temperature:
- Commercial (0 ~ 95°C)
- Industrial (-40 ~ 95°C)
Supports JEDEC clock jitter specification
Fully synchronous operation
Fast clock rate: 800MHz
Differential Clock, CK & CK#
Bidirectional differential data strobe
-DQS & DQS#
8 internal banks for concurrent operation
8n-bit prefetch architecture
Internal pipeline architecture
Precharge & active power down
Programmable Mode & Extended Mode registers
Additive Latency (AL): 0, CL-1, CL-2
Programmable Burst lengths: 4, 8
Burst type: Sequential / Interleave
These devices operate with a single 1.5V ± 0.075V
power supply and are available in BGA packages.
Output Driver Impedance Control
8192 refresh cycles / 64ms
- Average refresh period
7.8μs @ -40℃≦TC≦ +85℃
3.9μs @ +85℃<TC≦ +95℃
Write Leveling
OCD Calibration
Dynamic ODT (Rtt_Nom & Rtt_WR)
RoHS compliant
Auto Refresh and Self Refresh
96-ball 9 x 13 x 1.2mm FBGA package
- All parts are ROHS Compliant
Table 1. Speed Grade Information
Speed Grade
Clock Frequency CAS Latency
tRCD
tRP
(ns)
(ns)
DDR3-1600
800 MHz 11
13.75
13.75
Table 2 – Ordering Information for ROHS Compliant Products
Product part No
Org
Temperature
Package
AS4C256M16D3-12BCN
256M x 16
Commercial (Extended) 96-ball FBGA
0°C to 95°C
AS4C256M16D3-12BIN
256M x 16
Industrial
96-ball FBGA
-40°C to 95°C
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2
Rev. 3.0
Aug. /2014