|
1N4728A Datasheet, PDF (1/64 Pages) Motorola, Inc – One Watt Hermetically Sealed Glass Silicon Zener Diodes | |||
|
Austin Semiconductor, Inc.
COTS PEM
SDRAM
AS4DDR32M16
8 Meg x 16 x 4 Banks
Double Data Rate SDRAM
COTS, Plastic Encapsulated
Microcircuit
FEATURES
⢠VDD = +2.5V ±0.2V, VDDQ = +2.5V ±0.2V
⢠Bidirectional data strobe (DQS) transmitted/received with data,
i.e., source-synchronous data capture (has two â one per byte)
⢠Internal, pipelined double-data-rate (DDR) architecture; two data
accesses per clock cycle
⢠Differential clock inputs (CK and CK#)
⢠Commands entered on each positive CK edge
⢠DQS edge-aligned with data for READs; center-aligned with data
for WRITEs
⢠DLL to align DQ and DQS transitions with CK
⢠Four internal banks for concurrent operation
⢠Data mask (DM) for masking write data (has twoâone per byte)
⢠Programmable burst lengths: 2, 4, or 8
⢠Auto Refresh and Self Refresh Modes
⢠Longer lead TSOP for improved reliability (OCPL)
⢠2.5V I/O (SSTL_2 compatible)
⢠Concurrent auto precharge option is supported
⢠tRAS lockout supported (tRAP = tRCD)
PIN ASSIGNMENT
(Top View)
FIGURE 1: 66-Pin TSOP
OPTIONS
⢠Configuration
32 Meg x 16 (8 Meg x 16 x 4 banks)
MARKING
32M16
⢠Packaging
Plastic 66-pin TSOPII
(400 mil width, 0.65mm pin pitch)
DG
⢠Timing â Cycle Time
6ns @ CL = 2.5 (DDR333)
(FBGA only) (Future offering)
-6
7.5ns @ CL = 2.5 (DDR266B)
-75
8ns @ CL = 2.5 (DDR250)
-8
⢠Temperature Rating
Industrial Temperature (-40°C to +85°C)
IT
Enhanced Temperature (-40°C to +105°C)
ET
Military Temperature (-55°C to +125°C)
XT
Configuation
Refresh Count
Row Addressing
Bank Addressing
Column Addressing
8 Meg x 16 x 4 banks
8K
8K (A0 - A12)
4 (BA0, BA1)
1K (A0 - A9)
TABLE 1: Key Timing Parameters
SPEED
GRADE
-6
-75
-8
CLOCKRATE
CL = 2 CL=2.5
133 MHz
100 MHz
100 MHz
167 MHz
133 MHz
125 MHz
DATA-OUT
WINDOW
2.1 ns
2.5 ns
2.7 ns
ACCESS
WINDOW
±0.7 ns
±0.75 ns
±0.8 ns
DQS-DQ
SKEW
+0.40 ns
+0.5 ns
-0.6 ns
NOTES:
* CL = CAS (Read) Latency
For more products and information
please visit our web site at
www.austinsemiconductor.com
AS4DDR32M16
Rev. 1.5 06/06
1
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
|
▷ |