2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 1 - Rev. 1.3 March 2007
72Mb QDRII SRAM Specification
165 FBGA with Pb & Pb-Free
(RoHS compliant)
* Samsung Electronics reserves the right to change products or specification without notice.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN RELATION TO SAMSUNG PRODUCTS,
AND IS SUBJECT TO CHANGE WITHOUT NOTICE.
NOTHING IN THIS DOCUMENT SHALL BE CONSTRUED AS GRANTING ANY LICENSE,
EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE,
TO ANY INTELLECTUAL PROPERTY RIGHTS IN SAMSUNG PRODUCTS OR TECHNOLOGY.
ALL INFORMATION IN THIS DOCUMENT IS PROVIDED
ON AS "AS IS" BASIS WITHOUT GUARANTEE OR WARRANTY OF ANY KIND.
1. For updates or additional information about Samsung products, contact your nearest Samsung office.
2. Samsung products are not intended for use in life support, critical care, medical, safety equipment, or simi-
lar applications where Product failure could result in loss of life or personal or physical harm, or any military
or defense application, or any governmental procurement to which special terms or provisions may apply.
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 2 - Rev. 1.3 March 2007
Document Title
2Mx36-bit, 4Mx18-bit, 8Mx9-bit QDRTM II b2 SRAM
Revision History
Rev. No.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
1.0
1.1
1.2
1.3
Remark
Advance
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
Final
Final
Final
Final
History
1. Initial document.
1. Update AC timing characteristics.
2. Change the JTAG instruction coding.
1. Change the AC timing characteristics. (-25/-20 parts)
2. Correct the overshoot and undershoot timing diagrams.
3. Change the JTAG Block diagrams.
4. Update the Boundary scan exit order.
1. Correct the JTAG ID register definition
2. Correct the AC timing parameter (delete the tKHKH Max value)
1. Add the Power-on Sequence specification
1. Correct the pin name table
1. Update the power consumption (Icc & Isb)
1. Finalize the datasheet
1. Add Pb-free comment
2. Change the Max. clock cycle time in AC TIMING CHARACTERIS-
TICS
1. Correct the pin name table
1. Add Detail Specification of Power up Sequence
Draft Date
Sep, 14 2002
Oct. 24, 2002
Feb. 18, 2003
Mar. 20, 2003
Aug. 16, 2004
Oct. 18, 2004
May. 17, 2005
Aug. 2, 2005
Jul. 6, 2006
Jan. 23, 2007
Mar. 5, 2007
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 3 - Rev. 1.3 March 2007
2Mx36-bit, 4Mx18-bit, 8Mx9-bit QDRTM II b2 SRAM
FEATURES
FUNCTIONAL BLOCK DIAGRAM
• 1.8V+0.1V/-0.1V Power Supply.
• DLL circuitry for wide output data valid window and future fre-
quency scaling.
• I/O Supply Voltage 1.5V+0.1V/-0.1V for 1.5V I/O, 1.8V+0.1V/
-0.1V for 1.8V I/O.
• Separate independent read and write data ports
with concurrent read and write operation
• HSTL I/O
• Full data coherency, providing most current data.
• Synchronous pipeline read with self timed early write.
• Registered address, control and data input/output.
• DDR (Double Data Rate) Interface on read and write ports.
• Fixed 2-bit burst for both read and write operation.
• Clock-stop supports to reduce current.
• Two input clocks (K and K) for accurate DDR timing at clock
rising edges only.
• Two input clocks for output data (C and C) to minimize
clock-skew and flight-time mismatches.
• Two echo clocks (CQ and CQ) to enhance output data
traceability.
• Single address bus.
• Byte write function.
• Separate read/write control pin (R and W)
• Simple depth expansion with no data contention.
• Programmable output impedance.
• JTAG 1149.1 compatible test access port.
• 165FBGA(11x15 ball array FBGA) with body size of 15x17mm
& Lead Free
R
ADDRESS
W
C
C
D (Data in)
ADD
REG
DATA
REG
CLK
GEN
CTRL
LOGIC
2Mx36
(4Mx18)
MEMORY
ARRAY
WRITE DRIVER
K
K
BWX
36 (or 18, 9)
4(or 2)
* -F(E)C(I)
F(E) [Package type]: E-Pb Free, F-Pb
C(I) [Operating Temperature]: C-Commercial, I-Industrial
Org. Part
Number
Cycle
Time
Access
Time Unit RoHS
Avail.
X36
K7R643682M-F(E)C(I)25 4.0 0.45 ns √
K7R643682M-F(E)C(I)20 5.0 0.45 ns √
K7R643682M-F(E)C(I)16 6.0 0.50 ns •
X18
K7R641882M-F(E)C(I)25 4.0 0.45 ns √
K7R641882M-F(E)C(I)20 5.0 0.45 ns √
K7R641882M-F(E)C(I)16 6.0 0.50 ns •
X9
K7R640982M-F(E)C(I)25 4.0 0.45 ns √
K7R640982M-F(E)C(I)20 5.0 0.45 ns √
K7R640982M-F(E)C(I)16 6.0 0.50 ns •
SELECT OUTPUT CONTROL
SENSE AMPS
WRITE/READ DECODE
OUTPUT REG
OUTPUT SELECT
OUTPUT DRIVER
Notes: 1. Numbers in ( ) are for x18 device, x9 device also the same with appropriate adjustments of depth and width.
72
20
20 (or 21, 22)
36 (or 18, 9)
Q (Data Out)
36 (or 18,9) 36 (or 18, 9)
(Echo Clock out)
CQ, CQ
QDR SRAM and Quad Data Rate comprise a new family of products developed by Cypress, Renesas, IDT, NEC and Samsung technology.
(or 21,22)
(or 36,
18)
72
(or 36,
18)
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 4 - Rev. 1.3 March 2007
PIN CONFIGURATIONS(TOP VIEW) K7R643682M(2Mx36)
Notes: 1. * Checked No Connect (NC) pins are reserved for higher density address, i.e. 10A for 144Mb and 2A for 288Mb.
2. BW0 controls write to D0:D8, BW1 controls write to D9:D17, BW2 controls write to D18:D26 and BW3 controls write to D27:D35.
12345678910 11
ACQ NC/SA* SA W BW2KBW1RSA NC/SA* CQ
BQ27 Q18 D18 SA BW3KBW0SA D17 Q17 Q8
CD27 Q28 D19 VSS SA SA SA VSS D16 Q7 D8
DD28 D20 Q19 VSS VSS VSS VSS VSS Q16 D15 D7
EQ29 D29 Q20 VDDQ VSS VSS VSS VDDQ Q15 D6 Q6
FQ30 Q21 D21 VDDQ VDD VSS VDD VDDQ D14 Q14 Q5
GD30 D22 Q22 VDDQ VDD VSS VDD VDDQ Q13 D13 D5
HDoff VREF VDDQ VDDQ VDD VSS VDD VDDQ VDDQ VREF ZQ
JD31 Q31 D23 VDDQ VDD VSS VDD VDDQ D12 Q4 D4
KQ32 D32 Q23 VDDQ VDD VSS VDD VDDQ Q12 D3 Q3
LQ33 Q24 D24 VDDQ VSS VSS VSS VDDQ D11 Q11 Q2
MD33 Q34 D25 VSS VSS VSS VSS VSS D10 Q1 D2
ND34 D26 Q25 VSS SA SA SA VSS Q10 D9 D1
PQ35 D35 Q26 SA SA C SA SA Q9 D0 Q0
RTDO TCK SA SA SA C SA SA SA TMS TDI
PIN NAME
Notes: 1. C, C, K or K cannot be set to VREF voltage.
2. When ZQ pin is directly connected to VDD output impedance is set to minimum value and it
cannot be connected to ground or left unconnected
.
3. Not connected to chip pad internally.
SYMBOL PIN NUMBERS DESCRIPTION NOTE
K, K 6B, 6A Input Clock
C, C 6P, 6R Input Clock for Output Data 1
CQ, CQ 11A, 1A Output Echo Clock
Doff 1H DLL Disable when low
SA 3A,9A,4B,8B,5C-7C,5N-7N,4P,5P,7P,8P,3R-5R,7R-9R Address Inputs
D0-35
10P,11N,11M,10K,11J,11G,10E,11D,11C,10N,9M,9L
9J,10G,9F,10D,9C,9B,3B,3C,2D,3F,2G,3J,3L,3M,2N
1C,1D,2E,1G,1J,2K,1M,1N,2P
Data Inputs
Q0-35
11P,10M,11L,11K,10J,11F,11E,10C,11B,9P,9N,10L
9K,9G,10F,9E,9D,10B,2B,3D,3E,2F,3G,3K,2L,3N
3P,1B,2C,1E,1F,2J,1K,1L,2M,1P
Data Outputs
W4A Write Control Pin, active when low
R8A Read Control Pin, active when low
BW0, BW1,BW2, BW37B,7A,5A,5B Block Write Control Pin, active when low
VREF 2H,10H Input Reference Voltage
ZQ 11H Output Driver Impedance Control Input 2
VDD 5F,7F,5G,7G,5H,7H,5J,7J,5K,7K Power Supply (1.8 V)
VDDQ 4E,8E,4F,8F,4G,8G,3H,4H,8H,9H,4J,8J,4K,8K,4L,8L Output Power Supply (1.5V or 1.8V)
VSS 4C,8C,4D-8D,5E-7E,6F,6G,6H,6J,6K,5L-7L,4M,8M,4N,8N Ground
TMS 10R JTAG Test Mode Select
TDI 11R JTAG Test Data Input
TCK 2R JTAG Test Clock
TDO 1R JTAG Test Data Output
NC 2A,10A No Connect 3
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 5 - Rev. 1.3 March 2007
PIN CONFIGURATIONS(TOP VIEW) K7R641882M(4Mx18)
Notes: 1. * Checked No Connect (NC) pins are reserved for higher density address, i.e. 2A for 144Mb.
2. BW0 controls write to D0:D8 and BW1 controls write to D9:D17.
12345678910 11
ACQ NC/SA* SA W BW1KNC R SA SA CQ
BNC Q9 D9 SA NC K BW0SA NC NC Q8
CNC NC D10 VSS SA SA SA VSS NC Q7 D8
DNC D11 Q10 VSS VSS VSS VSS VSS NC NC D7
ENC NC Q11 VDDQ VSS VSS VSS VDDQ NC D6 Q6
FNC Q12 D12 VDDQ VDD VSS VDD VDDQ NC NC Q5
GNC D13 Q13 VDDQ VDD VSS VDD VDDQ NC NC D5
HDoff VREF VDDQ VDDQ VDD VSS VDD VDDQ VDDQ VREF ZQ
JNC NC D14 VDDQ VDD VSS VDD VDDQ NC Q4 D4
KNC NC Q14 VDDQ VDD VSS VDD VDDQ NC D3 Q3
LNC Q15 D15 VDDQ VSS VSS VSS VDDQ NC NC Q2
MNC NC D16 VSS VSS VSS VSS VSS NC Q1 D2
NNC D17 Q16 VSS SA SA SA VSS NC NC D1
PNC NC Q17 SA SA C SA SA NC D0 Q0
RTDO TCK SA SA SA C SA SA SA TMS TDI
PIN NAME
Notes: 1. C, C, K or K cannot be set to VREF voltage.
2. When ZQ pin is directly connected to VDD output impedance is set to minimum value and it
cannot be connected to ground or left unconnected
.
3. Not connected to chip pad internally.
SYMBOL PIN NUMBERS DESCRIPTION NOTE
K, K 6B, 6A Input Clock
C, C 6P, 6R Input Clock for Output Data 1
CQ, CQ 11A, 1A Output Echo Clock
Doff 1H DLL Disable when low
SA 3A,9A,10A,4B,8B,5C-7C,5N-7N,4P,5P,7P,8P,3R-5R,7R-9R Address Inputs
D0-17 10P,11N,11M,10K,11J,11G,10E,11D,11C,3B,3C,2D,
3F,2G,3J,3L,3M,2N Data Inputs
Q0-17 11P,10M,11L,11K,10J,11F,11E,10C,11B,2B,3D,3E,
2F,3G,3K,2L,3N,3P Data Outputs
W4A Write Control Pin, active when low
R8A Read Control Pin, active when low
BW0, BW17B, 5A Block Write Control Pin, active when low
VREF 2H,10H Input Reference Voltage
ZQ 11H Output Driver Impedance Control Input 2
VDD 5F,7F,5G,7G,5H,7H,5J,7J,5K,7K Power Supply (1.8 V)
VDDQ 4E,8E,4F,8F,4G,8G,3H,4H,8H,9H,4J,8J,4K,8K,4L,8L Output Power Supply (1.5V or 1.8V)
VSS 4C,8C,4D-8D,5E-7E,6F,6G,6H,6J,6K,5L-7L,4M-8M,4N,8N Ground
TMS 10R JTAG Test Mode Select
TDI 11R JTAG Test Data Input
TCK 2R JTAG Test Clock
TDO 1R JTAG Test Data Output
NC
2A,7A,1B,5B,9B,10B,1C,2C,9C,1D,9D,10D,1E,2E,9E,1F,9F,
10F,1G,9G,10G,1J,2J,9J,1K,2K,9K,1L,9L,10L,1M,2M,
9M,1N,9N,10N,1P,2P,9P
No Connect 3
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 6 - Rev. 1.3 March 2007
PIN CONFIGURATIONS(TOP VIEW) K7R640982M(8Mx9)
Notes: 1. BW controls write to D0:D8.
12345678910 11
ACQ SA SA W NC K NC R SA SA CQ
BNC NC NC SA NC K BW SA NC NC Q3
CNC NC NC VSS SA SA SA VSS NC NC D3
DNC D4 NC VSS VSS VSS VSS VSS NC NC NC
ENC NC Q4 VDDQ VSS VSS VSS VDDQ NC D2 Q2
FNC NC NC VDDQ VDD VSS VDD VDDQ NC NC NC
GNC D5 Q5 VDDQ VDD VSS VDD VDDQ NC NC NC
HDoff VREF VDDQ VDDQ VDD VSS VDD VDDQ VDDQ VREF ZQ
JNC NC NC VDDQ VDD VSS VDD VDDQ NC Q1 D1
KNC NC NC VDDQ VDD VSS VDD VDDQ NC NC NC
LNC Q6 D6 VDDQ VSS VSS VSS VDDQ NC NC Q0
MNC NC NC VSS VSS VSS VSS VSS NC NC D0
NNC D7 NC VSS SA SA SA VSS NC NC NC
PNC NC Q7 SA SA C SA SA NC D8 Q8
RTDO TCK SA SA SA C SA SA SA TMS TDI
PIN NAME
Notes: 1. C, C, K or K cannot be set to VREF voltage.
2. When ZQ pin is directly connected to VDD output impedance is set to minimum value and it
cannot be connected to ground or left unconnected
.
3. Not connected to chip pad internally.
SYMBOL PIN NUMBERS DESCRIPTION NOTE
K, K 6B, 6A Input Clock
C, C 6P, 6R Input Clock for Output Data 1
CQ, CQ 11A, 1A Output Echo Clock
Doff 1H DLL Disable when low
SA 2A,3A,9A,10A,4B,8B,5C-7C,5N-7N,4P,5P,7P,8P,3R-5R,7R-9R Address Inputs
D0-8 11M,11J,10E,11C,2D,2G,3L,2N,10P Data Inputs
Q0-8 11L,10J,11E,11B,3E,3G,2L,3P,11P Data Outputs
W4A Write Control Pin, active when low
R8A Read Control Pin, active when low
BW 7B Nibble Write Control Pin, active when low
VREF 2H,10H Input Reference Voltage
ZQ 11H Output Driver Impedance Control Input 2
VDD 5F,7F,5G,7G,5H,7H,5J,7J,5K,7K Power Supply (1.8 V)
VDDQ 4E,8E,4F,8F,4G,8G,3H,4H,8H,9H,4J,8J,4K,8K,4L,8L Output Power Supply (1.5V or 1.8V)
VSS 4C,8C,4D-8D,5E-7E,6F,6G,6H,6J,6K,5L-7L,4M-8M,4N,8N Ground
TMS 10R JTAG Test Mode Select
TDI 11R JTAG Test Data Input
TCK 2R JTAG Test Clock
TDO 1R JTAG Test Data Output
NC
7A,5A,1B,2B,3B,5B,9B,10B,1C,2C,3C,9C,10C,1D,3D,9D,10D,
11D,1E,2E,9E,1F,2F,3F,9F,10F,11F,1G,9G,10G,11G,1J,2J,3J,9J
1K,2K,3K,10K,11K,9K,1L,9L,10L,1M,2M,3M,9M,10M,1N,3N,9N
10N,11N,1P,2P,9P
No Connect 3
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 7 - Rev. 1.3 March 2007
The K7R643682M,K7R641882M and K7R640982M are 75,497,472-bits QDR (Quad Data Rate)
Synchronous Pipelined Burst SRAMs.
They are organized as 2,097,152 words by 36bits for K7R643682M, 4,194,304 words by 18 bits for K7R641882M and
8,388,608 words by 9bits for K7R640982M.
The QDR operation is possible by supporting DDR read and write operations through separate data output and input ports
with the same cycle. Memory bandwidth is maximized as data can be transferred into SRAM on every rising edge of K and K,
and transferred out of SRAM on every rising edge of C and C.
And totally independent read and write ports eliminate the need for high speed bus turn around.
Address, data inputs, and all control signals are synchronized to the input clock (K or K).
Normally data outputs are synchronized to output clocks (C and C), but when C and C are tied high,
the data outputs are synchronized to the input clocks (K and K).
Read data are referenced to echo clock (CQ or CQ) outputs.
Read address is registered on rising edges of the input K clocks,
and write address is registered on rising edges of the input K clocks.
Common address bus is used to access address both for read and write operations.
The internal burst counter is fixed to 2-bit sequential for both read and write operations.
Synchronous pipeline read and early write enable high speed operations.
Simple depth expansion is accomplished by using R and W for port selection.
Byte write operation is supported with BW0 and BW1(BW2 and BW3) pins for x18 (x36) device and only BW pin for x9 device.
IEEE 1149.1 serial boundary scan (JTAG) simplifies monitoring package pads attachment status with system.
The K7R643682M,K7R641882M and K7R640982M are implemented with SAMSUNG's high performance 6T CMOS technology
and is available in 165pin FBGA packages. Multiple power and ground pins minimize ground bounce.
GENERAL DESCRIPTION
Read Operations
Read cycles are initiated by activating R at the rising edge of the positive input clock K.
Address is presented and stored in the read address register synchronized with K clock.
For 2-bit burst DDR operation, it will access two 36-bit or 18-bit or 9-bit data words with each read command.
The first pipelined data is transferred out of the device triggered by C clock following next K clock rising edge.
Next burst data is triggered by the rising edge of following C clock rising edge.
Continuous read operations are initiated with K clock rising edge.
And pipeline data are transferred out of device on every rising edge of both C and C clocks.
In case C and C tied to high, output data are triggered by K and K instead of C and C.
When the R is disabled after a read operation, the K7R643682M,K7R641882M and K7R640982M will first complete burst read
operation before entering into deselect mode at the next K clock rising edge.
Then output drivers disabled automatically to high impedance state.
Write cycles are initiated by activating W at the rising edge of the positive input clock K.
Address is presented and stored in the write address register synchronized with following K clock.
For 2-bit burst DDR operation, it will write two 36-bit or 18-bit or 9-bit data words with each write command.
The first "early" data is transferred and registered in to the device synchronous with same K clock rising edge with W presented.
Next burst data is transferred and registered synchronous with following K clock rising edge.
Continuous write operations are initiated with K rising edge.
And "early writed" data is presented to the device on every rising edge of both K and K clocks.
When the W is disabled, the K7R643682M, K7R641882M, and K7R640982M will enter into deselect mode.
The device disregards input data presented on the same cycle W disabled.
The K7R643682M, K7R641882M and K7R640982M support byte write operations.
With activating BW0 or BW1 (BW2 or BW3) in write cycle, only one byte of input data is presented.
In K7R641882M, BW0 controls write operation to D0:D8, BW1 controls write operation to D9:D17.
And in K7R643682M BW2 controls write operation to D18:D26, BW3 controls write operation to D27:D35.
And in K7R640982M BW controls write operation to D0:D8.
Write Operations
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 8 - Rev. 1.3 March 2007
Programmable Impedance Output Buffer Operation
Depth Expansion
The designer can program the SRAM's output buffer impedance by terminating the ZQ pin to VSS through a precision resistor (RQ).
The value of RQ (within 15%) is five times the output impedance desired.
For example, 250Ω resistor will give an output impedance of 50Ω.
Impedance updates occur early in cycles that do not activate the outputs, such as deselect cycles.
In all cases impedance updates are transparent to the user and do not produce access time "push-outs" or other anomalous
behavior in the SRAM.
To guarantee optimum output driver impedance after power up, the SRAM needs 1024 non-read cycles.
Separate input and output ports enables easy depth expansion.
Each port can be selected and deselected independently and read and write operation do not affect each other.
Before chip deselected, all read and write pending operations are completed.
Clock Consideration
K7R643682M,K7R641882M and K7R640982M utilizes internal DLL (Delay-Locked Loops) for maximum output data valid window.
It can be placed into a stopped-clock state to minimize power with a modest restart time of 1024 clock cycles.
Circuitry automatically resets the DLL when absence of input clock is detected.
The following power-up supply voltage application is recommended: VSS, VDD, VDDQ, VREF, then VIN. VDD and VDDQ can be applied
simultaneously, as long as VDDQ does not exceed VDD by more than 0.5V during power-up. The following power-down supply voltage
removal sequence is recommended: VIN, VREF, VDDQ, VDD, VSS. VDD and VDDQ can be removed simultaneously, as long as VDDQ
does not exceed VDD by more than 0.5V during power-down.
Power-Up/Power-Down Supply Voltage Sequencing
Echo clock operation
To assure the output traceability, the SRAM provides the output Echo clock, pair of compliment clock CQ and CQ,
which are synchronized with internal data output.
Echo clocks run free during normal operation.
The Echo clock is triggered by internal output clock signal, and transferred to external through same structures as output driver.
Single Clock Mode
K7R643682M,K7R641882M and K7R640982M can be operated with the single clock pair K and K, instead of C or C for output
clocks.
To operate these devices in single clock mode, C and C must be tied high during power up
and must be maintained high during operation.
After power up, this device can’t change to or from single clock mode.
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 9 - Rev. 1.3 March 2007
Detail Specification of Power-Up Sequence in QDRII SRAM
QDRII SRAMs must be powered up and initialized in a predefined manner to prevent undefined operations.
• Power-Up Sequence
1. Apply power and keep Doff at low state (All other inputs may be undefined)
- Apply VDD before VDDQ
- Apply VDDQ before VREF or the same time with VREF
2. Just after the stable power and clock(K,K), take Doff to be high.
3. The additional 2048 cycles of clock input is required to lock the DLL after enabling DLL
* Notes: If you want to tie up the Doff pin to High with unstable clock, then you must stop the clock for a few seconds
(Min. 30ns) to reset the DLL after it become a stable clock status.
• DLL Constraints
1. DLL uses either K clock as its synchronizing input, the input should have low phase jitter which is specified as TK var.
2. The lower end of the frequency at which the DLL can operate is 120MHz.
3. If the incoming clock is unstable and the DLL is enabled, then the DLL may lock onto a wrong frequency
and this may cause the failure in the initial stage.
Status
Power-Up
K,K
* Notes: When the operating frequency is changed, DLL reset should be required again.
After DLL reset again, the minimum 2048 cycles of clock input is needed to lock the DLL.
~
~
Unstable
CLKstage
1024 cycle
~
~
DLL Locking Range Any
Command
Power up & Initialization Sequence (Doff pin Fixed high, Clock controlled)
K,K
~
~
Min 30ns
V
DD
V
DDQ
V
REF
Doff
V
DD
V
DDQ
V
REF
~
~
~
~
1024 cycle
~
~
Status
Power-Up Unstable
CLKstage DLL Locking Range Any
Command
Stop Clock
~
~
Inputs Clock
must be stable
~
~
~
~
~
~
~
~
~
~
~
~
~
~
Power up & Initialization Sequence (Doff pin controlled)
Inputs Clock
must be stable
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 10 - Rev. 1.3 March 2007
WRITE TRUTH TABLE(x18)
Notes: 1. X means "Don′t Care".
2. All inputs in this table must meet setup and hold time around the rising edge of input clock K or K (↑ ).
3. Assumes a WRITE cycle was initiated.
4. This table illustrates operation for x18 devices. x9 device operation is similar except that BW controls D0:D8.
K K BW0BW1OPERATION
↑L L WRITE ALL BYTEs (K↑ )
↑L L WRITE ALL BYTEs (K↑ )
↑L H WRITE BYTE 0 (K↑ )
↑L H WRITE BYTE 0 (K↑ )
↑H L WRITE BYTE 1 (K↑ )
↑H L WRITE BYTE 1 (K↑ )
↑H H WRITE NOTHING (K↑ )
↑H H WRITE NOTHING (K↑ )
WRITE TRUTH TABLE(x36)
Notes: 1. X means "Don′t Care".
2. All inputs in this table must meet setup and hold time around the rising edge of input clock K or K (↑).
3. Assumes a WRITE cycle was initiated.
K K BW0BW1BW2BW3OPERATION
↑LLLL WRITE ALL BYTEs (K↑ )
↑LLLL WRITE ALL BYTEs (K
↑ )
↑L H H H WRITE BYTE 0 (K↑ )
↑L H H H WRITE BYTE 0 (K↑ )
↑H L H H WRITE BYTE 1 (K↑ )
↑H L H H WRITE BYTE 1 (K↑ )
↑H H L L WRITE BYTE 2 and BYTE 3 (K↑ )
↑H H L L WRITE BYTE 2 and BYTE 3 (K↑ )
↑HHHH WRITE NOTHING (K↑ )
↑HHHH WRITE NOTHING (K
↑ )
TRUTH TABLES
SYNCHRONOUS TRUTH TABLE
Notes: 1. X means "Don′t Care".
2. The rising edge of clock is symbolized by (↑ ).
3. Before enter into clock stop status, all pending read and write operations will be completed.
K R W D Q OPERATION
D(A0) D(A1) Q(A0) Q(A1)
Stopped X X Previous state Previous state Previous state Previous state Clock Stop
↑H H X X High-Z High-Z No Operation
↑LX X X D
OUT at C(t+1) DOUT at C(t+2) Read
↑X L Din at K(t) Din at K(t) X X Write
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 11 - Rev. 1.3 March 2007
DC ELECTRICAL CHARACTERISTICS(VDD=1.8V ±0.1V, TA=0°C to +70°C)
Notes: 1. Minimum cycle. IOUT=0mA.
2. |IOH|=(VDDQ/2)/(RQ/5)±15% for 175Ω ≤ RQ ≤ 350Ω. |IOL|=(VDDQ/2)/(RQ/5)±15% for 175Ω ≤ RQ ≤ 350Ω.
3. Minimum Impedance Mode when ZQ pin is connected to VDDQ.
4. Operating current is calculated with 50% read cycles and 50% write cycles.
5. Standby Current is only after all pending read and write burst operations are completed.
6. Programmable Impedance Mode.
7. These are DC test criteria. DC design criteria is VREF±50mV. The AC VIH/VIL levels are defined separately for measuring timing parameters.
8. VIL (Min.) DC=-0.3V, VIL (Min.) AC=-1.5V(pulse width ≤ 3ns).
9. VIH (Max)DC=VDDQ+0.3, VIH (Max)AC=VDDQ+0.85V(pulse width ≤ 3ns).
PARAMETER SYMBOL TEST CONDITIONS MIN MAX UNIT NOTES
Input Leakage Current IIL VDD=Max; VIN=VSS to VDDQ -2 +2 µA
Output Leakage Current IOL Output Disabled, -2 +2 µA
Operating Current (x36):
QDR mode ICC VDD=Max, IOUT=0mA
Cycle Time ≥ tKHKH Min.
-25 - 950
mA 1,4-20 - 850
-16 - 800
Operating Current (x18):
QDR mode ICC VDD=Max, IOUT=0mA
Cycle Time ≥ tKHKH Min.
-25 - 900
mA 1,4-20 - 800
-16 - 750
Operating Current (x9):
QDR mode ICC VDD=Max, IOUT=0mA
Cycle Time ≥ tKHKH Min.
-25 - 850
mA 1,4-20 - 750
-16 - 700
Standby Current (NOP):
QDR mode ISB1
Device deselected, IOUT=0mA,
f=Max,
All Inputs≤0.2V or ≥ VDD-0.2V
-25 - 400
mA 1,5-20 - 380
-16 - 360
Output High Voltage VOH1 VDDQ/2-0.12 VDDQ/2+0.12 V 2,6
Output Low Voltage VOL1 VDDQ/2-0.12 VDDQ/2+0.12 V 2,6
Output High Voltage VOH2 IOH=-1.0mA VDDQ-0.2 VDDQ V3
Output Low Voltage VOL2 IOL=1.0mA VSS 0.2 V 3
Input Low Voltage VIL -0.3 VREF-0.1 V 7,8
Input High Voltage VIH VREF+0.1 VDDQ+0.3 V 7,9
ABSOLUTE MAXIMUM RATINGS*
*Note: 1. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated in the operating sections of this specification
is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
2. VDDQ must not exceed VDD during normal operation.
PARAMETER SYMBOL RATING UNIT
Voltage on VDD Supply Relative to VSS VDD -0.5 to 2.9 V
Voltage on VDDQ Supply Relative to VSS VDDQ -0.5 to VDD V
Voltage on Input Pin Relative to VSS VIN -0.5 to VDD+0.3 V
Storage Temperature TSTG -65 to 150 °C
Operating Temperature (Commercial / Industrial) TOPR 0 to 70 / -40 to 85 °C
Storage Temperature Range Under Bias TBIAS -10 to 85 °C
OPERATING CONDITIONS (0°C ≤ TA ≤ 70°C)
PARAMETER SYMBOL MIN MAX UNIT
Supply Voltage VDD 1.7 1.9 V
VDDQ 1.4 1.9 V
Reference Voltage VREF 0.68 0.95 V
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 12 - Rev. 1.3 March 2007
AC ELECTRICAL CHARACTERISTICS (VDD=1.8V ±0.1V, TA=0°C to +70°C)
Notes: 1. This condition is for AC function test only, not for AC parameter test.
2. To maintain a valid level, the transition edge of the input must:
a) Sustain a constant slew rate from the current AC level through the target AC level, VIL(AC) or VIH(AC)
b) Reach at least the target AC level
c) After the AC target level is reached, continue to maintain at least the target DC level, VIL(DC) or VIH(DC)
PARAMETER SYMBOL MIN MAX UNIT NOTES
Input High Voltage VIH (AC) VREF + 0.2 - V 1,2
Input Low Voltage VIL (AC) - VREF - 0.2 V 1,2
AC TIMING CHARACTERISTICS(VDD=1.8V±0.1V, TA=0°C to +70°C)
Notes: 1. All address inputs must meet the specified setup and hold times for all latching clock edges.
2. Control singles are R, W,BW0,BW1 and BW2, BW3, also for x36
3. If C,C are tied high, K,K become the references for C,C timing parameters.
4. To avoid bus contention, at a given voltage and temperature tCHQX1 is bigger than tCHQZ.
The specs as shown do not imply bus contention because tCHQX1 is a MIN parameter that is worst case at totally different test conditions
(0°C, 1.9V) than tCHQZ, which is a MAX parameter (worst case at 70°C, 1.7V)
It is not possible for two SRAMs on the same board to be at such different voltage and temperature.
5. Clock phase jitter is the variance from clock rising edge to the next expected clock rising edge.
6. Vdd slew rate must be less than 0.1V DC per 50ns for DLL lock retention. DLL lock time begins once Vdd and input clock are stable.
7. Echo clock is very tightly controlled to data valid/data hold. By design, there is a ± 0.1ns variation from echo clock to data.
The data sheet parameters reflect tester guard bands and test setup variations.
PARAMETER SYMBOL -25 -20 -16 UNITS NOTES
MIN MAX MIN MAX MIN MAX
Clock
Clock Cycle Time (K, K, C, C)tKHKH 4.00 8.40 5.00 8.40 6.00 8.40 ns
Clock Phase Jitter (K, K, C, C)tKC var 0.20 0.20 0.20 ns 5
Clock High Time (K, K, C, C)tKHKL 1.60 2.00 2.40 ns
Clock Low Time (K, K, C, C)tKLKH 1.60 2.00 2.40 ns
Clock to Clock (K↑ → K↑, C↑ → C↑)tKHKH1.80 2.20 2.70 ns
Clock to data clock (K↑ → C↑, K↑→ C↑)tKHCH 0.00 1.80 0.00 2.30 0.00 2.80 ns
DLL Lock Time (K, C) tKC lock 1024 1024 1024 cycle 6
K Static to DLL reset tKC reset 30 30 30 ns
Output Times
C, C High to Output Valid tCHQV 0.45 0.45 0.50 ns 3
C, C High to Output Hold tCHQX -0.45 -0.45 -0.50 ns 3
C, C High to Echo Clock Valid tCHCQV 0.45 0.45 0.50 ns
C, C High to Echo Clock Hold tCHCQX -0.45 -0.45 -0.50 ns
CQ, CQ High to Output Valid tCQHQV 0.30 0.35 0.40 ns 7
CQ, CQ High to Output Hold tCQHQX -0.30 -0.35 -0.40 ns 7
C, High to Output High-Z tCHQZ 0.45 0.45 0.50 ns 3
C, High to Output Low-Z tCHQX1 -0.45 -0.45 -0.50 ns 3
Setup Times
Address valid to K rising edge tAVKH 0.35 0.40 0.50 ns
Control inputs valid to K rising edge tIVKH 0.35 0.40 0.50 ns 2
Data-in valid to K, K rising edge tDVKH 0.35 0.40 0.50 ns
Hold Times
K rising edge to address hold tKHAX 0.35 0.40 0.50 ns
K rising edge to control inputs hold tKHIX 0.35 0.40 0.50 ns
K, K rising edge to data-in hold tKHDX 0.35 0.40 0.50 ns
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 13 - Rev. 1.3 March 2007
Note: For power-up, VIH ≤ VDDQ+0.3V and VDD ≤ 1.7V and VDDQ ≤ 1.4V t ≤ 200ms
VIL
VDDQ+0.5V
20% tKHKH(MIN)
VSS
VIH
VSS-0.5V
20% tKHKH
Undershoot TimingOverershoot Timing
VDDQ/2
50Ω
SRAM Zo=50Ω
0.75V
VREF
ZQ
250Ω
AC TEST OUTPUT LOADAC TEST CONDITIONS
Note: Parameters are tested with RQ=250Ω
Parameter Symbol Value Unit
Core Power Supply Voltage VDD 1.7~1.9 V
Output Power Supply Voltage VDDQ 1.4~1.9 V
Input High/Low Level VIH/VIL 1.25/0.25 V
Input Reference Level VREF 0.75 V
Input Rise/Fall Time TR/TF0.3/0.3 ns
Output Timing Reference Level VDDQ/2 V
VDDQ
VDDQ+0.25V
VSS-0.25V
THERMAL RESISTANCE
Note: Junction temperature is a function of on-chip power dissipation, package thermal impedance, mounting site temperature and mounting site
thermal impedance. TJ=TA + PD x θJA
PRMETER SYMBOL TYP Unit NOTES
Junction to Ambient θJA 21 °C/W
Junction to Case θJC 2.48 °C/W
PIN CAPACITANCE
Note: 1. Parameters are tested with RQ=250Ω and VDDQ=1.5V.
2. Periodically sampled and not 100% tested.
PRMETER SYMBOL TESTCONDITION TYP MAX Unit NOTES
Address Control Input Capacitance CIN VIN=0V 3.5 4 pF
Input and Output Capacitance COUT VOUT=0V 4 5 pF
Clock Capacitance CCLK -34pF
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 14 - Rev. 1.3 March 2007
APPLICATION INRORMATION
SRAM#1
D
SA RWBW0
Q
ZQ
KCC
SRAM#4
R
Vt
Vt
Vt
R=50Ω Vt=VREF
Vt
Vt
R
R=250Ω
BW1K
D
SA RW BW0
Q
K
CCBW1K
Data In
Data Out
Address
R
W
BW
Return CLK
Source CLK
Return CLK
Source CLK
MEMORY
CONTROLLER
CQ
CQ
ZQ R=250Ω
CQ
CQ
ZQ
SRAM1 Input CQ
SRAM1 Input CQ
SRAM4 Input CQ
SRAM4 Input CQ
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 15 - Rev. 1.3 March 2007
tKLKH
tKHKH
tKHKH
tKHKL
tAVKH tKHAX
A1 A2 A3
tIVKH tKHIX
tCHQX1
tKHCH
tCHQV
tCHQX tCHQZ
tCQHQV
tCQHQX
tCHCQX
tCHCQV
tCHQV
tCHCQX
tCHCQV
tKLKH
tKHKH
tKHKL tKHKH
Note: 1. Q1-1 refers to output from address A1+0, Q1-2 refers to output from address A1+1 i.e. the next internal burst address following A1+0.
2. Outputs are disabled one cycle after a NOP.
K
SA
R
K
Q (Data Out)
C
C
TIMING WAVE FORMS OF READ AND NOP
Don′t Care Undefined
CQ
CQ
Q1-1 Q1-2 Q2-1 Q2-2 Q3-1
tKLKH
tKHKH
tKHKH
tKHKL
tAVKH tKHAX
A1 A2 A3
D1-1 D1-2 D2-1 D2-2
K
SA
W
K
D (Data In)
TIMING WAVE FORMS OF WRITE AND NOP
D3-1 D3-2
tIVKH
tKHIX
tKHIX
tDVKH tKHDX Don′t Care Undefined
Note: 1.D1-1 refers to input to address A1+0, D1-2 refers to input to address A1+1, i.e the next internal burst address following A1+0.
2. BWx assumed active.
READ NOP NOPREAD READ
WRITE NOP NOPWRITE WRITE
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 16 - Rev. 1.3 March 2007
A1 A3
TIMING WAVE FORMS OF READ, WRITE AND NOP
Don′t Care Undefined
Note: 1. If address A2=A3, data Q3-1=D2-1, data Q3-2=D2-2.
Write data is forwarded immediately as read results.
2.BWx assumed active.
K
SA
W
K
C
C
R
D (Data In)
Q (Data Out)
CQ
CQ
A4 A5 A6A2 A7
D2-2D2-1 D4-1 D4-2 D6-1 D6-2 D7-1 D7-2
Q5-2Q1-1 Q1-2 Q3-1 Q3-2 Q5-1
READ NOPREAD WRITEWRITE WRITE READ WRITE NOP
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 17 - Rev. 1.3 March 2007
IEEE 1149.1 TEST ACCESS PORT AND BOUNDARY SCAN-JTAG
This part contains an IEEE standard 1149.1 Compatible Test Access Port (TAP). The package pads are monitored by the Serial Scan
circuitry when in test mode. This is to support connectivity testing during manufacturing and system diagnostics. Internal data is not
driven out of the SRAM under JTAG control. In conformance with IEEE 1149.1, the SRAM contains a TAP controller, Instruction Reg-
ister, Bypass Register and ID register. The TAP controller has a standard 16-state machine that resets internally upon power-up,
therefore, TRST signal is not required. It is possible to use this device without utilizing the TAP. To disable the TAP controller without
interfacing with normal operation of the SRAM, TCK must be tied to VSS to preclude mid level input. TMS and TDI are designed so an
undriven input will produce a response identical to the application of a logic 1, and may be left unconnected. But they may also be
tied to VDD through a resistor. TDO should be left unconnected.
TAP Controller State Diagram
JTAG Block Diagram
Test Logic Reset
Run Test Idle
011
1
1
0
0
0
1
0
1
1
0
0
0
1
0
1
1
1
0
0
0
0
0
0
0
Select DR
Capture DR
Shift DR
Exit1 DR
Pause DR
Exit2 DR
Update DR
Select IR
Capture IR
Shift IR
Exit1 IR
Pause IR
Exit2 IR
Update IR
1
1
1
1
1
JTAG Instruction Coding
NOTE:
1. Places DQs in Hi-Z in order to sample all input data regardless of other
SRAM inputs. This instruction is not IEEE 1149.1 compliant.
2. Places DQs in Hi-Z in order to sample all input data regardless of other
SRAM inputs.
3. TDI is sampled as an input to the first ID register to allow for the serial shift
of the external TDI data.
4. Bypass register is initiated to VSS when BYPASS instruction is invoked. The
Bypass Register also holds serially loaded TDI when exiting the Shift DR
states.
5. SAMPLE instruction dose not places DQs in Hi-Z.
6. This instruction is reserved for future use.
IR2 IR1 IR0 Instruction TDO Output Notes
0 0 0 EXTEST Boundary Scan Register 1
0 0 1 IDCODE Identification Register 3
0 1 0 SAMPLE-Z Boundary Scan Register 2
0 1 1 RESERVED Do Not Use 6
1 0 0 SAMPLE Boundary Scan Register 5
1 0 1 RESERVED Do Not Use 6
1 1 0 RESERVED Do Not Use 6
1 1 1 BYPASS Bypass Register 4
SRAM
CORE
BYPASS Reg.
Identification Reg.
Instruction Reg.
Control Signals
TAP Controller
TDO
TDI
TMS
TCK
CQ
K,K
C,C
A,D
Q
CQ
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 18 - Rev. 1.3 March 2007
ID REGISTER DEFINITION
Note: Part Configuration
/def=011 for 72Mb, /wx=11 for x36, 10 for x18, 00 for x9.
/t=1 for DLL Ver., 0 for non-DLL Ver. /q=1 for QDR, 0 for DDR /b=1 for 4Bit Burst, 0 for 2Bit Burst /s=1 for Separate I/O, 0 for Common I/O
Part Revision Number
(31:29)
Part Configuration
(28:12)
Samsung JEDEC Code
(11: 1) Start Bit(0)
2Mx36 000 00def0wx0t0q0b0s0 00001001110 1
4Mx18 000 00def0wx0t0q0b0s0 00001001110 1
8Mx9 000 00def0wx0t0q0b0s0 00001001110 1
SCAN REGISTER DEFINITION
Part Instruction Register Bypass Register ID Register Boundary Scan
2Mx36 3 bits 1 bit 32 bits 109 bits
4Mx18 3 bits 1 bit 32 bits 109 bits
8Mx9 3 bits 1 bit 32 bits 109 bits
Note: 1. NC pins are read as "X" (i.e. don′t care.)
ORDER PIN ID
37 10D
38 9E
39 10C
40 11D
41 9C
42 9D
43 11B
44 11C
45 9B
46 10B
47 11A
48 10A
49 9A
50 8B
51 7C
52 6C
53 8A
54 7A
55 7B
56 6B
57 6A
58 5B
59 5A
60 4A
61 5C
62 4B
63 3A
64 2A
65 1A
66 2B
67 3B
68 1C
69 1B
70 3D
71 3C
72 1D
ORDER PIN ID
73 2C
74 3E
75 2D
76 2E
77 1E
78 2F
79 3F
80 1G
81 1F
82 3G
83 2G
84 1H
85 1J
86 2J
87 3K
88 3J
89 2K
90 1K
91 2L
92 3L
93 1M
94 1L
95 3N
96 3M
97 1N
98 2M
99 3P
100 2N
101 2P
102 1P
103 3R
104 4R
105 4P
106 5P
107 5N
108 5R
109 Internal
ORDER PIN ID
16R
26P
36N
47P
57N
67R
78R
88P
99R
10 11P
11 10P
12 10N
13 9P
14 10M
15 11N
16 9M
17 9N
18 11L
19 11M
20 9L
21 10L
22 11K
23 10K
24 9J
25 9K
26 10J
27 11J
28 11H
29 10G
30 9G
31 11F
32 11G
33 9F
34 10F
35 11E
36 10E
BOUNDARY SCAN EXIT ORDER
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 19 - Rev. 1.3 March 2007
JTAG DC OPERATING CONDITIONS
Note: 1. The input level of SRAM pin is to follow the SRAM DC specification.
Parameter Symbol Min Typ Max Unit Note
Power Supply Voltage VDD 1.7 1.8 1.9 V
Input High Level VIH 1.3 - VDD+0.3 V
Input Low Level VIL -0.3 - 0.5 V
Output High Voltage (IOH=-2mA) VOH 1.4 - VDD V
Output Low Voltage(IOL=2mA) VOL VSS -0.4V
JTAG TIMING DIAGRAM
JTAG AC Characteristics
Parameter Symbol Min Max Unit Note
TCK Cycle Time tCHCH 50 - ns
TCK High Pulse Width tCHCL 20 - ns
TCK Low Pulse Width tCLCH 20 - ns
TMS Input Setup Time tMVCH 5-ns
TMS Input Hold Time tCHMX 5-ns
TDI Input Setup Time tDVCH 5-ns
TDI Input Hold Time tCHDX 5-ns
SRAM Input Setup Time tSVCH 5-ns
SRAM Input Hold Time tCHSX 5-ns
Clock Low to Output Valid tCLQV 010ns
JTAG AC TEST CONDITIONS
Note: 1. See SRAM AC test output load on page 12.
Parameter Symbol Min Unit Note
Input High/Low Level VIH/VIL 1.3/0.5 V
Input Rise/Fall Time TR/TF 1.0/1.0 ns
Input and Output Timing Reference Level 0.9 V 1
TCK
TMS
TDI
PI
tCHCH
tMVCH tCHMX
tCHCL tCLCH
tDVCH tCHDX
tCLQV
TDO
(SRAM)
tSVCH tCHSX
2Mx36 & 4Mx18 & 8Mx9 QDRTM II b2 SRAM
K7R643682M
K7R641882M
K7R640982M
- 20 - Rev. 1.3 March 2007
165 FBGA PACKAGE DIMENSIONS
CSide View
15mm x 17mm Body, 1.0mm Bump Pitch, 11x15 Ball Array
FB
∅ H
G
A
Bottom View
Top View
B
A
D
E
E
Symbol Value Units Note Symbol Value Units Note
A15 ± 0.1 mm E1.0 mm
B17 ± 0.1 mm F14.0 mm
C1.3 ± 0.1 mm G10.0 mm
D0.35 ± 0.05 mm H0.5 ± 0.05 mm
