IS61NLP12832A
IS61NLP12836A/IS61NVP12836A
IS61NLP25618A/IS61NVP25618A
128K x 32, 128K x 36, and 256K x 18
4Mb, PIPELINE 'NO WAIT' STATE BUS SRAM
ISSI
OCTOBER 2006
®
FEATURES
• 100 percent bus utilization
• No wait cycles between Read and Write
• Internal self-timed write cycle
• Individual Byte Write Control
• Single R/W (Read/Write) control pin
• Clock controlled, registered address,
data and control
• Interleaved or linear burst sequence control using
MODE input
• Three chip enables for simple depth expansion
and address pipelining
• Power Down mode
• Common data inputs and data outputs
•
CKE
pin to enable clock and suspend operation
• JEDEC 100-pin TQFP, 165-ball PBGA and 119-
ball PBGA packages
• Power supply:
NVP: V
DD
2.5V (± 5%), V
DDQ
2.5V (± 5%)
NLP: V
DD
3.3V (± 5%), V
DDQ
3.3V/2.5V (± 5%)
• Industrial temperature available
• Lead-free available
DESCRIPTION
The 4 Meg 'NLP/NVP' product family feature high-speed,
low-power synchronous static RAMs designed to provide
a burstable, high-performance, 'no wait' state, device for
networking and communications applications. They are
organized as 128K words by 32 bits, 128K words by 36 bits,
and 256K words by 18 bits, fabricated with
ISSI
's advanced
CMOS technology.
Incorporating a 'no wait' state feature, wait cycles are
eliminated when the bus switches from read to write, or
write to read. This device integrates a 2-bit burst counter,
high-speed SRAM core, and high-drive capability outputs
into a single monolithic circuit.
All synchronous inputs pass through registers are controlled
by a positive-edge-triggered single clock input. Operations
may be suspended and all synchronous inputs ignored
when Clock Enable,
CKE
is HIGH. In this state the internal
device will hold their previous values.
All Read, Write and Deselect cycles are initiated by the
ADV input. When the ADV is HIGH the internal burst
counter is incremented. New external addresses can be
loaded when ADV is LOW.
Write cycles are internally self-timed and are initiated by
the rising edge of the clock inputs and when
WE
is LOW.
Separate byte enables allow individual bytes to be written.
A burst mode pin (MODE) defines the order of the burst
sequence. When tied HIGH, the interleaved burst sequence
is selected. When tied LOW, the linear burst sequence is
selected.
FAST ACCESS TIME
Symbol
t
KQ
t
KC
Parameter
Clock Access Time
Cycle Time
Frequency
-250
2.6
4
250
-200
3.1
5
200
Units
ns
ns
MHz
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 latest version of this device specification before relying on any
published information and before placing orders for products.
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. A
10/03/06
1
IS61NLP12832A
IS61NLP12836A/IS61NVP12836A
IS61NLP25618A/IS61NVP25618A
PIN CONFIGURATION — 128K
X
36, 165-Ball PBGA (TOP VIEW)
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
NC
NC
DQPc
DQc
DQc
DQc
DQc
NC
DQd
DQd
DQd
DQd
DQPd
NC
MODE
2
A
A
NC
DQc
DQc
DQc
DQc
NC
DQd
DQd
DQd
DQd
NC
NC
NC
3
CE
CE2
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
NC
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
A
A
4
BWc
BWd
V
SS
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
SS
A
A
5
BWb
BWa
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
NC
NC
NC
6
CE2
CLK
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
NC
A1*
A0*
7
CKE
WE
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
V
SS
NC
NC
NC
8
ADV
OE
V
SS
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
SS
A
A
9
NC
NC
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
NC
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
A
A
ISSI
10
A
A
NC
DQb
DQb
DQb
DQb
NC
DQa
DQa
DQa
DQa
NC
A
A
11
NC
NC
DQPb
DQb
DQb
DQb
DQb
ZZ
DQa
DQa
DQa
DQa
DQPa
NC
A
®
Note:
A0 and A1 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
WE
CLK
CKE
BWx
(x=a-d)
OE
ZZ
Pin Name
Address Inputs
Synchronous Burst Address Inputs
Synchronous Burst Address Advance/
Load
Synchronous Read/Write Control
Input
Synchronous Clock
Clock Enable
Synchronous Byte Write Inputs
Output Enable
Power Sleep Mode
MODE
V
DD
NC
DQx
DQPx
V
DDQ
V
SS
Burst Sequence Selection
3.3V/2.5V Power Supply
No Connect
Data Inputs/Outputs
Parity Data I/O
Isolated output Power Supply
3.3V/2.5V
Ground
CE, CE2,
CE2 Synchronous Chip Enable
4
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. A
10/03/06
PCB Design
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