IS43DR83200A
IS43/46DR16160A, IS43DR32160A
32Mx8, 16Mx16, 16Mx32 (stacked die)
DDR2 DRAM
FEATURES
• V
dd
= 1.8V ±0.1V, V
ddq
= 1.8V ±0.1V
• JEDEC standard 1.8V I/O (SSTL_18-compati-
ble)
• 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)
ADVANCED INFORMATION
AUGUST 2009
DESCRIPTION
ISSI's 256Mb/512Mb 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
Configuration
Refresh Count
Row Addressing
Column
Addressing
Bank Addressing
Precharge
Addressing
32M x 8
8M x 8 x 4
banks
8K/64ms
1K (A0-A9)
BA0, BA1
A10
16M x 16
4M x 16 x 4
banks
8K/64ms
512 (A0-A8)
BA0, BA1
A10
16M x 32
4M x 32 x 4
banks
8K/64ms
8K (A0-A12)
512 (A0-A8)
BA0, BA1
A10
8K (A0-A12) 8K (A0-A12)
KEY TIMING PARAMETERS
Speed Grade
tRCD
tRP
tRC
tRAS
tCK @CL=3
tCK @CL=4
tCK @CL=5
tCK @CL=6
-25E
15
15
60
45
5
3.75
3
2.5
-3D
15
15
60
45
5
3.75
3
—
-37C
15
15
60
45
5
3.75
—
—
-5B
15
15
55
40
5
5
—
—
OPTIONS
• Configuration(s):
32Mx8 (8Mx8x4 banks) IS43DR83200A
16Mx16 (4Mx16x4 banks) IS43/46DR16160A
16Mx32 (4Mx32x4 banks) IS43DR32160A
• Package:
x8: 60-ball BGA (8mm x 12mm)
x16: 84-ball WBGA (8mm x 12.5mm)
x32: 128-ball WBGA (10.5mm x 13.5mm)
Timing – Cycle time
2.5ns @CL=6 DDR2-800E
3.0ns @CL=5 DDR2-667D
3.75ns @CL=4 DDR2-533C
5.0ns @CL=4 DDR2-400B
• Temperature Range:
Commercial (0°C
≤
Tc
≤
85°C)
Industrial (-40°C
≤
Tc
≤
95°C; -40°C
≤
T
a
≤
85°C)
Automotive, A1 (-40°C
≤
Tc
≤
95°C; -40°C
≤
T
a
≤
85°C)
Automotive, A2 (-40°C
≤
Tc; T
a
≤
105°C)
Tc = Case Temp, T
a
= Ambient Temp
• Die Revision: A
Copyright © 2006 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. — www.issi.com
Rev. 00B
07/28/09
1
IS43DR83200A, IS43/46DR16160A, IS43DR32160A
GENERAL DESCRIPTION
Read and write accesses to the DDR2 SDRAM are burst oriented; accesses start at a selected location and continue
for a burst length of four or eight in a programmed sequence. Accesses begin with the registration of an Active
command, which is then followed by a Read or Write command. The address bits registered coincident with the active
command are used to select the bank and row to be accessed (BA0-BA1 select the bank; A0-A12 select the row). The
address bits registered coincident with the Read or Write command are used to select the starting column location
(A0-A8 for x16/x32) and (A0-A9 for x8) for the burst access and to determine if the auto precharge A10 command is
to be issued. Prior to normal operation, the DDR2 SDRAM must be initialized. The following sections provide detailed
information covering device initialization, register definition, command descriptions and device operation.
FUNCTIONAL BLOCK DIAGRAM
DMa - DMb
RDQS,
RDQS
Notes:
1. An:n = no. of address pins - 1
2. DQm: m = no. of data pins - 1
3. For x8 devices:
DMa - DMb = DM; DQSa - DQSb = DQS;
DQSa
-
DQSb
=
DQS;
RDQS,
RDQS
available only for x8
4. For x16 devices:
DMa - DMb = UDM, LDM; DQSa - DQSb = UDQS, LDQS;
DQSa
-
DQSb
=
UDQS, LDQS
5. For x32 devices:
DMa - DMb = DM0 - DM3, LDM; DQSa - DQSb = DQS0 - DQS3, LDQS;
DQSa
-
DQSb
=
DQS0, DQS3
2
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00B
07/28/09
IS43DR83200A, IS43/46DR16160A, IS43DR32160A
PIN DESCRIPTION TABLE
Symbol
CK,
CK
Type
Input
Function
Clock: CK and
CK
are differential clock inputs. All address and control input signals
are sampled on the crossing of the positive edge of CK and negative edge of
CK.
Output (read) data is referenced to the crossings of CK and
CK
(both directions of
crossing).
Clock Enable: CKE HIGH activates, and CKE LOW deactivates, internal clock signals
and device input buffers and output drivers. Taking CKE LOW provides Precharge
Power-Down and Self Refresh operation (all banks idle), or Active Power-Down (row
Active in any bank). CKE is synchronous for power down entry and exit, and for self
refresh entry. CKE is asynchronous for self refresh exit. After VREF has become
stable during the power on and initialization sequence, it must be maintained for
proper operation of the CKE receiver. For proper self-refresh entry and exit, VREF
must be maintained to this input. CKE must be maintained HIGH throughout read and
write accesses. Input buffers, excluding CK,
CK,
ODT and CKE are disabled during
power-down. Input buffers, excluding CKE, are disabled during self refresh.
Chip Select: All commands are masked when
CS
is registered HIGH.
CS
provides for
external Rank selection on systems with multiple Ranks.
CS
is considered part of the
command code.
On Die Termination: ODT (registered HIGH) enables termination resistance internal
to the DDR2 SDRAM. When enabled, ODT is applied to each DQ, DQS,
DQS,
DM
signals. The ODT pin will be ignored if the EMR(1) is programmed to disable ODT.
Command Inputs:
RAS,
CAS
and
WE
(along with
CS)
define the command being
entered.
Input Data Mask: DM is an input mask signal for write data. Input data is masked
when DM is sampled HIGH coincident with that input data during a Write access. DM
is sampled on both edges of DQS. Although DM pins are input only, the DM loading
matches the DQ and DQS loading. For x8, the function of DM is enabled by EMRS
command to EMR(1) [A11].
Bank Address Inputs: BA0 - BA1 define to which bank an Active, Read, Write or
Precharge command is being applied. Bank address also determines if the mode
register or one of the extended mode registers is to be accessed during a MRS or
EMRS command cycle.
Address Inputs: Provide the row address for Active commands and the column
address and Auto Precharge bit for Read/Write commands to select one location
out of the memory array in the respective bank. A10 is sampled during a Precharge
command to determine whether the Precharge applies to one bank (A10 LOW) or all
banks (A10 HIGH). If only one bank is to be precharged, the bank is selected by BA0 -
BA1. The address inputs also provide the op-code during MRS or EMRS commands.
CKE
Input
CS
Input
ODT
RAS, CAS, WE
Input
Input
DM (x8) or
UDM, LDM (x16)
or
DM0-DM3 (x32)
Input
BA0 - BA1
Input
A0 - A12
Input
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00B
07/28/09
3
IS43DR83200A, IS43/46DR16160A, IS43DR32160A
Symbol
DQ0-7 x8
DQ0-15 x16
DQ0-31 x32
Type
Input/
Output
Function
Data Input/Output: Bi-directional data bus.
Data Strobe: output with read data, input with write data. Edge-aligned with read data,
centered in write data. The data strobes DQS(n) may be used in single ended mode
or paired with optional complementary signals
DQS(n)
to provide differential pair
signaling to the system during both reads and writes. A control bit at EMR(1)[A10]
enables or disables all complementary data strobe signals.
DQS, (DQS)
RDQS, (RDQS) x8
UDQS, (UDQS),
LDQS, (LDQS) x16
DQS 0-3,
(DQS 0-3) x32
Input/
Output
x8
DQS corresponds to the data on DQ0-DQ7
RDQS corresponds to the Read data on DQ0-DQ7, and is enabled by EMRS
command to EMR(1) [A11].
x16
LDQS corresponds to the data on DQ0-DQ7
UDQS corresponds to the data on DQ8-DQ15
x32
DQS0 corresponds to the data on DQ0-DQ7
DQS1 corresponds to the data on DQ8-DQ15
DQS2 corresponds to the data on DQ16-DQ23
DQS3 corresponds to the data on DQ24-DQ31
NC
VDDQ
VSSQ
VDDL
VSSDL
VDD
VSS
VREF
Supply
Supply
Supply
Supply
Supply
Supply
Supply
No Connect: No internal electrical connection is present.
DQ Power Supply: 1.8 V +/- 0.1 V
DQ Ground
DLL Power Supply: 1.8 V +/- 0.1 V
DLL Ground
Power Supply: 1.8 V +/- 0.1 V
Ground
Reference voltage
4
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00B
07/28/09
IS43DR83200A, IS43/46DR16160A, IS43DR32160A
PIN CONFIGURATION
PACKAGE CODE: B 60 BALL FBGA (Top View) (8.00 mm x 12 mm Body, 0.8 mm Ball Pitch)
1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
K
L
VDD
RDQS
VSS
DQ6
VSSQ
DM/RDQS
VSSQ
DQS
VDDQ
DQS
VSSQ DQ7
VDDQ DQ1 VDDQ
DQ4
VSSQ DQ3
VSS
WE
BA1
A1
A5
A9
NC
VDDQ DQ0 VDDQ
DQ2
VSSQ DQ5
VDDL VREF
CKE
NC
BA0
A10
VSS
A3
A7
VDD
A12
VSSDL
LDQS
VDD
RAS
CAS
A2
A6
A11
NC
CK
CS
A0
A4
A8
NC
VSS
VDD
ODT
Not populated
Pin name
A0 to A12
BA0, BA1
DQ0 to DQ7
DQS, /DQS
/CS
CKE
CK, /CK
DM
RDQS, /RDQS
Function
Address inputs
Bank select
Data input/output
Differential data strobe
Chip select
Clock enable
Differential clock input
Write data mask
Differential Redundant Data Strobe
Pin name
ODT
VDD
VSS
VDDQ
VSSQ
VREF
VDDL
VSSDL
NC
Function
ODT control
Supply voltage for internal circuit
Ground for internal circuit
Supply voltage for DQ circuit
Ground for DQ circuit
Input reference voltage
Supply voltage for DLL circuit
Ground for DLL circuit
No connection
/RAS, /CAS, /WE Command input
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00B
07/28/09
5