IS4346DR16160B Datasheet, PDF (1/46 Pages) Integrated Silicon Solution, Inc – Differential data strobe

IS43/46DR16160B
16Mx16 DDR2 DRAM
FEATURES
• Vdd = 1.8V ±0.1V, Vddq = 1.8V ±0.1V
• JEDEC standard 1.8V I/O (SSTL_18-compatible)
• Double data rate interface: two data transfers per
clock cycle
• Differential data strobe (DQS, DQS)
• 4-bit prefetch architecture
• On chip DLL to align DQ and DQS transitions with
CK
• 4 internal banks for concurrent operation
• Programmable CAS latency (CL) 3, 4, 5, 6 and 7 sup-
ported
• Posted CAS and programmable additive latency (AL)
0, 1, 2, 3, 4, 5 and 6 supported
• WRITE latency = READ latency - 1 tCK
• Programmable burst lengths: 4 or 8
• Adjustable data-output drive strength, full and re-
duced strength options
• On-die termination (ODT)
OPTIONS
• Configuration:
16Mx16 (4Mx16x4 banks) IS43/46DR16160B
• Package:
84-ball TW-BGA (8mm x 12.5mm)
Timing – Cycle time
2.5ns @CL=5 DDR2-800D
2.5ns @CL=6 DDR2-800E
3.0ns @CL=5 DDR2-667D
3.75ns @CL=4 DDR2-533C
5.0ns @CL=3 DDR2-400B
• Temperature Range:
Commercial (0°C ≤ Tc ≤ 85°C)
Industrial (-40°C ≤ Tc ≤ 95°C; -40°C ≤ Ta ≤ 85°C)
Automotive, A1 (-40°C ≤ Tc ≤ 95°C; -40°C ≤ Ta ≤ 85°C)
Automotive, A2 (-40°C ≤ Tc; Ta ≤ 105°C)
Tc = Case Temp, Ta = Ambient Temp
SEPTEMBER 2013
DESCRIPTION
ISSI's 256Mb DDR2 SDRAM uses a double-data-rate
architecture to achieve high-speed operation. The
double-data rate architecture is essentially a 4n-prefetch
architecture, with an interface designed to transfer two
data words per clock cycle at the I/O balls.
ADDRESS TABLE
Parameter
16M x 16
Configuration
4M x 16 x 4
banks
Refresh Count 8K/64ms
Row Addressing 8K (A0-A12)
Column
Addressing
512 (A0-A8)
Bank Addressing BA0, BA1
Precharge
A10
Addressing
KEY TIMING PARAMETERS
Speed Grade -25D -3D -37C
tRCD
12.5 15 15
tRP
12.5 15 15
tRC
55 55 55
tRAS
40 40 40
tCK @CL=3
5
5
5
tCK @CL=4
3.75 3.75 3.75
tCK @CL=5
2.5 3 —
tCK @CL=6
2.5 — —
Copyright © 2013 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without
notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the lat-
est version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reason-
ably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications
unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. — www.issi.com
1
Rev. A
9/6/2013