®
IS61NVP51236 IS61NVP10018
ISSI
PRELIMINARY INFORMATION
SEPTEMBER 2002
512K x 36 and 1M x 18
PIPELINE 'NO WAIT' STATE BUS SRAM
FEATURES
DESCRIPTION
The 18 Meg 'NVP' product family feature high-speed,
low-power synchronous static RAMs designed to provide
a burstable, high-performance, 'no wait' state, device for
network and communications customers. They are
organized as 524, 288 words by 36 bits and 1M words by
18 bits, fabricated with ISSI's advanced CMOS
technology.
• 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
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.
• Interleaved or linear burst sequence control
using MODE input
• Three chip enables for simple depth expansion
and address pipelining for TQFP
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.
• Power Down mode
• Common data inputs and data outputs
• CKE pin to enable clock and suspend operation
• JEDEC 100-pin TQFP, 119 PBGA package
• VDD +2.5V power supply (± 5%)
• VDDQ: 2.5V I/O Supply Voltage
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.
• Industrial temperature available
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
tKQ
Parameter
-133
4.2
-166
3.6
6
Units
ns
Clock Access Time
CycleTime
tKC
7.5
ns
Frequency
133
166
MHz
Copyright © 2002 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. — www.issi.com — 1-800-379-47744
Rev.00A
1
09/06/02