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 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 —
1-800-379-4774
Rev. B2
03/04/2020
1
IS61(64)LF25636B, IS61VF/VVF25636B
IS61(64)LF51218B, IS61VF/VVF51218B
BLOCK DIAGRAM
MODE
CLK
/CKE
/ADV
/ADSC
/ADSP
A0-x
x18: x=18
x36: x=17
BINARY
COUNTER
/CE
/CLR
D
ADDRESS
REGISTER
/CE
CLK
/GW
/BWE
/BW(a-x)
x18:x=b,
x32,x36:x=d
/CE
CE2
/CE2
D
Q
DQ(a-d)
BYTE WRITE
REGISTERS
CLK
D
ENABLE
REGISTERS
Q
Q
256Kx36;
512Kx18
Memory Array
Q1
Q0
A0
A0`
A1
A1`
INPUT
REGISTER
CLK
OUTPUT
REGISTER
DQ(a-x)
x18:x=b,
x32,x36:x=d
ZZ
Power
Down
CLK
CLK
/OE
2
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. B2
03/04/2020
IS61(64)LF25636B, IS61VF/VVF25636B
IS61(64)LF51218B, IS61VF/VVF51218B
165-PIN BGA
119-PIN BGA
165-Ball, 13x15 mm BGA
119-Ball, 14x22 mm BGA
BOTTOM VIEW
BOTTOM VIEW
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. B2
03/04/2020
3
IS61(64)LF25636B, IS61VF/VVF25636B
IS61(64)LF51218B, IS61VF/VVF51218B
119 BGA PACKAGE PIN CONFIGURATION-
256K x 36 (TOP VIEW)
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
DDQ
NC
NC
DQc
DQc
V
DDQ
DQc
DQc
V
DDQ
DQd
DQd
V
DDQ
DQd
DQd
NC
NC
V
DDQ
2
A
CE2
A
DQPc
DQc
DQc
DQc
DQc
V
DD
DQd
DQd
DQd
DQd
DQPd
A
NC
TMS
3
A
A
A
Vss
Vss
Vss
BWc
Vss
NC
Vss
BWd
Vss
Vss
Vss
MODE
A
TDI
4
ADSP
ADSC
V
DD
NC
CE
OE
ADV
GW
V
DD
CLK
NC
BWE
A
1
*
A
0
*
V
DD
A
TCK
5
A
A
A
Vss
Vss
Vss
BWb
Vss
NC
Vss
BWa
Vss
Vss
Vss
NC
A
TDO
6
A
A
A
DQPb
DQb
DQb
DQb
DQb
V
DD
DQa
DQa
DQa
DQa
DQPa
A
NC
NC
7
V
DDQ
NC
NC
DQb
DQb
V
DDQ
DQb
DQb
V
DDQ
DQa
DQa
V
DDQ
DQa
DQa
NC
ZZ
V
DDQ
Note:
* A
0
and A
1
are the two least significant bits (LSB) of the address field and set the internal burst counter if burst is desired.
PIN DESCRIPTIONS
Symbol
A
A0, A1
ADV
ADSP
ADSC
GW
CLK
CE,
CE2
BWx
(x=a-d)
BWE
Pin Name
Address Inputs
Synchronous Burst Address Inputs
Synchronous Burst Address
Advance
Address Status Processor
Address Status Controller
Global Write Enable
Synchronous Clock
Synchronous Chip Select
Synchronous Byte Write Controls
Byte Write Enable
Symbol
OE
ZZ
MODE
TCK, TDO
TMS, TDI
NC
DQa-DQd
DQPa-Pd
Vdd
Vddq
Vss
No Connect
Data Inputs/Outputs
Parity Data Inputs/Outputs
Power Supply
I/O Power Supply
Ground
Pin Name
Output Enable
Power Sleep Mode
Burst Sequence Selection
JTAG Pins
4
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. B2
03/04/2020
IS61(64)LF25636B, IS61VF/VVF25636B
IS61(64)LF51218B, IS61VF/VVF51218B
119 BGA PACKAGE PIN CONFIGURATION
512Kx18 (TOP VIEW)
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
DDQ
NC
NC
DQb
NC
V
DDQ
NC
DQb
V
DDQ
NC
DQb
V
DDQ
DQb
NC
NC
NC
V
DDQ
2
A
CE2
A
NC
DQb
NC
DQb
NC
V
DD
DQb
NC
DQb
NC
DQPb
A
A
TMS
3
A
A
A
Vss
Vss
Vss
BWb
Vss
NC
Vss
Vss
Vss
Vss
Vss
MODE
A
TDI
4
ADSP
ADSC
V
DD
NC
CE
OE
ADV
GW
V
DD
CLK
NC
BWE
A
1
*
A
0
*
V
DD
NC
TCK
5
A
A
A
Vss
Vss
Vss
Vss
Vss
NC
Vss
BWa
Vss
Vss
Vss
NC
A
TDO
6
A
A
A
DQPa
NC
DQa
NC
DQa
V
DD
NC
DQa
NC
DQa
NC
A
A
NC
7
V
DDQ
NC
NC
NC
DQa
V
DDQ
DQa
NC
V
DDQ
DQa
NC
V
DDQ
NC
DQa
NC
ZZ
V
DDQ
Note:
* A
0
and A
1
are the two least significant bits (LSB) of the address field and set the internal burst counter if burst is desired.
PIN DESCRIPTIONS
Symbol
A
A0, A1
ADV
ADSP
ADSC
GW
CLK
CE,
CE2
BWx
(x=a,b)
BWE
Pin Name
Address Inputs
Synchronous Burst Address Inputs
Synchronous Burst Address
Advance
Address Status Processor
Address Status Controller
Global Write Enable
Synchronous Clock
Synchronous Chip Select
Synchronous Byte Write Controls
Byte Write Enable
Symbol
OE
ZZ
MODE
TCK, TDO
TMS, TDI
NC
DQa-DQb
DQPa-Pb
Vdd
Vddq
Vss
No Connect
Data Inputs/Outputs
Parity Data Inputs/Outputs
Power Supply
I/O Power Supply
Ground
Pin Name
Output Enable
Power Sleep Mode
Burst Sequence Selection
JTAG Pins
Integrated Silicon Solution, Inc. — www.issi.com —
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