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What is IS46DR32801B?

This electronic component, produced by the manufacturer "ISSI", performs the same function as "8Mx32 256Mb DDR2 DRAM".


IS46DR32801B Datasheet PDF - ISSI

Part Number IS46DR32801B
Description 8Mx32 256Mb DDR2 DRAM
Manufacturers ISSI 
Logo ISSI Logo 


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IS43/46DR32801B
8Mx32
256Mb 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, and 6
supported
• Posted CAS and programmable additive latency
(AL) 0, 1, 2, 3, 4, and 5 supported
• WRITE latency = READ latency - 1 tCK
• Programmable burst lengths: 4 or 8
• Adjustable data-output drive strength, full and
reduced strength options
• On-die termination (ODT)
OPTIONS
• Configuration:
8M x 32 (IS43/46DR32801B - 8K refresh)
• Package: x32: 126-ball WBGA
• Timing – Cycle time
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; 0°C Ta 70°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 105°C; –40°C Ta 105°C)
Tc = Case Temp, Ta = Ambient Temp
ADVANCED INFORMATION
JUNE 2012
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.
The 256Mb DDR2 SDRAM is provided in a wide bus
x32 format, designed to offer a smaller footprint and
support compact designs.
ADDRESS TABLE
Parameter
Configuration
Refresh Count
Row Addressing
Column
Addressing
Bank Addressing
Precharge
Addressing
8M x 32
4M x 32 x 4 banks
8K/64ms
A0-A12
A0-A7
BA0, BA1
A10/AP
KEY TIMING PARAMETERS
Speed Grade -25E -3D -37C
tRCD
15 15 15
tRP 15 15 15
tRC 60 60 60
tRAS
45 45 45
tCK @CL=3
555
tCK @CL=4
3.75 3.75 3.75
tCK @CL=5
3 3 3.75
tCK @CL=6
2.5 3 3.75
-5B
15
15
55
40
5
5
5
5
Copyright © 2012 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
Rev.  00B
06/07/2012
1

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IS46DR32801B equivalent
IS43/46DR32801B
PIN CONFIGURATION
126-ball BGA for x32 (Top View) (10.5mm x 13.5mm Body, 0.8mm Ball Pitch)
PACKAGE CODE: B
1 2 3 4 5 6 7 8 9 10 11 12
A
VDD DQ0 VSSQ VSS
B
DQ1 VDDQ DQ2 VDDQ
C
D VSSQ DQ3 VSSQ DQS0
DQ4 VDDQ DQS0 VDDQ
E
VSSQ DQ5 VSSQ DQ6
F
G DQ7 VDDQ DM0 VSS
WE RAS CKE ODT
H
J CAS CS VDD VDDL
K A3 A10 A1 A7
A9 A5 A12
L
M DQ23 VDDQ DM2 VSS
N VSSQ DQ21 VSSQ DQ22
P DQ20 VDDQ DQS2 VDDQ
R VSSQ DQ19 VSSQ DQS2
S DQ17 VDDQ DQ18 VDDQ
VDD DQ16 VSSQ VSS
VSS VSSQ DQ8 VDD
VDDQ DQ10 VDDQ DQ9
DQS1 VSSQ DQ11 VSSQ
VDDQ DQS1 VDDQ DQ12
DQ14 VSSQ DQ13 VSSQ
VDD DM1 VDDQ DQ15
VREF NC BA0 CK
VSSDL VSS BA1 CK
A2 A0 A6 A4
NC A11 A8
VDD DM3 VDDQ DQ31
DQ30 VSSQ DQ29 VSSQ
VDDQ DQS3 VDDQ DQ28
DQS3 VSSQ DQ27 VSSQ
VDDQ DQ26 VDDQ DQ25
VSS VSSQ DQ24 VDD
Not populated
Pin name
A0 to A12
BA0, BA1
DQ0 to DQ31
DQS0 to DQS3
/DQS0 to /DQS3
/CS
/RAS, /CAS, /WE
CKE
CK, /CK
DM0 to DM3
Function
Address inputs
Bank select
Data input/output
Differential data strobe
Chip select
Command input
Clock enable
Differential clock input
Write data mask
Pin name
ODT
VDD
VSS
VDDQ
Function
ODT control
Supply voltage for internal circuit
Ground for internal circuit
Supply voltage for DQ circuit
VSSQ
VREF
VDDL
VSSDL
NC
Ground for DQ circuit
Input reference voltage
Supply voltage for DLL circuit
Ground for DLL circuit
No connection
Integrated Silicon Solution, Inc. — www.issi.com
Rev.  00B
06/07/2012
5


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Featured Datasheets

Part NumberDescriptionMFRS
IS46DR32801AThe function is 8Mx32 256Mb DDR2 DRAM. ISSIISSI
IS46DR32801BThe function is 8Mx32 256Mb DDR2 DRAM. ISSIISSI

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