IS43/46LD16640A
IS43/46LD32320A
1Gb (x16, x32) Mꢁbꢂle LpddR2 s4 sdRAM
AUGUst 2014
FꢀAtURꢀs
dꢀscRiption
The IS43/46LD16640A/32320A is 1,073,741,824 bits
CMOS Mobile Double Data Rate Synchronous DRAMs
organized as 8 banks (S4). The deviceis organized as 8
banks of 8Meg words of 16bits or 4Meg words of 32bits.
This product 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 pins. This product offers fully
synchronous operations referenced to both rising and
falling edges of the clock. The data paths are internally
pipelined and 4n bits prefetched to achieve very high
bandwidth.
•ꢀ Low-voltage Core and I/O Power Supplies
VDD2 = 1.14-1.30V, VDDCA/VDDQ = 1.14-1.30V,
VDD1 = 1.70-1.95V
•ꢀ High Speed Un-terminated Logic(HSUL_12) I/O
Interface
•ꢀ Clock Frequency Range : 10MHz to 400MHz
(data rate range : 20Mbps to 800 Mbps per I/O)
•ꢀ Four-bit Pre-fetch DDR Architecture
•ꢀ Multiplexed, double data rate, command/ad-
dress inputs
•ꢀ Eight internal banks for concurrent operation
•ꢀ Bidirectional/differential data strobe per byte of
data (DQS/DQS#)
•ꢀ Programmable Read/Write latencies(RL/WL)
AddRꢀss tABLꢀ
Parameter
and burst lengths(4,8 or 16)
32Mx32
R0-R12
C0-C8
64Mx16
R0-R12
C0-C9
•ꢀ Per-bank refresh for concurrent operation
•ꢀ ZQ Calibration
Row Addresses
Column Addresses
Bank Addresses
Refresh Count
•ꢀ On-chip temperature sensor to control self re-
BA0-BA2 BA0-BA2
fresh rate
4K
4K
•ꢀ Partial –array self refresh(PASR) – Bank & Seg-
ment masking
•ꢀ Deep power-down mode(DPD)
kꢀY tiMinG pARAMꢀtꢀRs
•ꢀ Operation Temperature
Commercial (TC = 0°C to 85°C)
Industrial (TC = -40°C to 85°C)
Speed
Grade
Data
Rate
Write
Read tRCD/
Latency Latency tRP
(Mb/s)
Automotive, A1 (T
Automotive, A2 (T
C
= -40°C to 85°C)
= -40°C to 105°C)
C
-25
-3
800
667
3
2
6
5
Typical
Typical
options
•ꢀ Configuration:
Note: Other clock frequencies/data rates supported; please
refer to AC timing tables.
− 64Mx16 (8M x 16 x 8 banks)
− 32Mx32 (4M x 32 x 8 banks)
Package:
− 134-ball BGA for x16 / x32
− 168-ball PoP BGA for x32
Copyright © 2014 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 latest 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 reasonably be ex-
pected 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
8/6/2014