IS61NF25618-10B datasheet, PDF

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IS61NF25618-10B: DescriptionZBT SRAM, 256KX18, 10ns, CMOS, PBGA119, PLASTIC, BGA-119; Categorystorage storage; File Size151KB，20 Pages; ManufacturerIntegrated Silicon Solution ( ISSI )

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IS61NF25618-10B Overview

ZBT SRAM, 256KX18, 10ns, CMOS, PBGA119, PLASTIC, BGA-119

IS61NF25618-10B Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Integrated Silicon Solution ( ISSI )
Parts packaging code	BGA
package instruction	PLASTIC, BGA-119
Contacts	119
Reach Compliance Code	compliant
ECCN code	3A991.B.2.A
Maximum access time	10 ns
Other features	FLOW-THROUGH ARCHITECTURE
Maximum clock frequency (fCLK)	83 MHz
I/O type	COMMON
JESD-30 code	R-PBGA-B119
JESD-609 code	e0
length	22 mm
memory density	4718592 bit
Memory IC Type	ZBT SRAM
memory width	18
Number of functions	1
Number of terminals	119
word count	262144 words
character code	256000
Operating mode	SYNCHRONOUS
Maximum operating temperature	70 °C
Minimum operating temperature
organize	256KX18
Output characteristics	3-STATE
Package body material	PLASTIC/EPOXY
encapsulated code	BGA
Encapsulate equivalent code	BGA119,7X17,50
Package shape	RECTANGULAR
Package form	GRID ARRAY
Parallel/Serial	PARALLEL
Peak Reflow Temperature (Celsius)	240
power supply	2.5/3.3,3.3 V
Certification status	Not Qualified
Maximum seat height	2.41 mm
Maximum standby current	0.02 A
Minimum standby current	3.14 V
Maximum slew rate	0.3 mA
Maximum supply voltage (Vsup)	3.465 V
Minimum supply voltage (Vsup)	3.135 V
Nominal supply voltage (Vsup)	3.3 V
surface mount	YES
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	BALL
Terminal pitch	1.27 mm
Terminal location	BOTTOM
Maximum time at peak reflow temperature	30
width	14 mm

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IS61NF12832 IS61NF12836 IS61NF25618

IS61NLF12832 IS61NLF12836 IS61NLF25618

128K x 32, 128K x 36 and 256K x 18

FLOW-THROUGH 'NO WAIT' STATE BUS

SRAM

ISSI

PRELIMINARY INFORMATION

OCTOBER 2000

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 for TQFP

Power Down mode

Common data inputs and data outputs

CKE

pin to enable clock and suspend operation

JEDEC 100-pin TQFP, 119 PBGA package

Single +3.3V power supply (± 5%)

NF Version: 3.3V I/O Supply Voltage

NLF Version: 2.5V I/O Supply Voltage

Industrial temperature available

DESCRIPTION

The 4 Meg 'NF' 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 131,072 words by 32 bits, 131,072 words

by 36 bits and 262,144 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

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

Parameter

Clock Access Time

Cycle Time

Frequency

-8.5*

8.5

100

-9

-10

Units

MHz

*This speed available only in NF version

This document contains PRELIMINARY INFORMATION data. ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the

Integrated Silicon Solution, Inc. — 1-800-379-4774

PRELIMINARY INFORMATION

11/30/00

Rev. 00C

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