IS61VPS102436A IS61LPS102436A
IS61VPS204818A IS61LPS204818A
1Mb x 36, 2Mb x 18
36Mb SYNCHRONOUS PIPELINED,
SINGLE CYCLE DESELECT STATIC RAM
MARCH 2008
DESCRIPTION
FEATURES
The ISSI IS61LPS/VPS102436A and IS61LPS/VPS
204818A are high-speed, low-power synchronous static
RAMsdesignedtoprovideburstable,high-performancememory
for communication and networking applications. The
IS61LPS/VPS102436Aisorganizedas1,048,476words
by 36 bits. The IS61LPS/VPS204818A is organized as
2M-word by 18 bits. Fabricated with ISSI's advanced
CMOS technology, the device integrates a 2-bit burst
counter,high-speedSRAMcore,andhigh-drivecapability
outputs into a single monolithic circuit. All synchronous
inputs pass through registers controlled by a positive-
edge-triggeredsingleclockinput.
• Internal self-timed write cycle
• Individual Byte Write Control and Global Write
• Clock controlled, registered address, data and
control
• Burst sequence control using MODE input
• Three chip enable option for simple depth
expansion and address pipelining
• Common data inputs and data outputs
• Auto Power-down during deselect
• Single cycle deselect
Write cycles are internally self-timed and are initiated by
therisingedgeoftheclockinput. Writecyclescanbeone
tofourbyteswideascontrolledbythewritecontrolinputs.
• Snooze MODE for reduced-power standby
• Power Supply
Separatebyteenablesallowindividualbytestobewritten.
The byte write operation is performed by using the byte
write enable (BWE) input combined with one or more
individual byte write signals (BWx). In addition, Global
Write (GW) is available for writing all bytes at one time,
regardless of the byte write controls.
LPS: VDD 3.3V + 5%, VDDQ 3.3V/2.5V + 5%
VPS: VDD 2.5V + 5%, VDDQ 2.5V + 5%
• JEDEC 100-Pin TQFP and 165-ball PBGA
packages
Bursts can be initiated with either ADSP (Address Status
Processor) or ADSC (Address Status Cache Controller)
inputpins.Subsequentburstaddressescanbegenerated
internally and controlled by the ADV (burst address
advance) input pin.
• Lead-free available
The mode pin is used to select the burst sequence order,
Linear burst is achieved when this pin is tied LOW.
Interleave burst is achieved when this pin is tied HIGH or
left floating.
FAST ACCESS TIME
Symbol
tKQ
Parameter
200
3.1
5
166
3.5
6
Units
ns
Clock Access Time
Cycle Time
tKC
ns
Frequency
200
166
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
arisingoutoftheapplicationoruseofanyinformation, productsorservicesdescribedherein. Customersareadvisedtoobtainthelatestversionofthisdevicespecificationbeforerelyingonany
publishedinformationandbeforeplacingordersforproducts.
Integrated Silicon Solution, Inc.
1
Rev. B
03/27/08