Integrated Silicon Solution, Inc. — www.issi.com

1

Rev. F

11/09/09

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.

IS42S16400F

IS45S16400F

FEATURES

• Clock frequency: 200, 166, 143, 133 MHz

• Fullysynchronous;allsignalsreferencedtoa

positive clock edge

• Internalbankforhidingrowaccess/precharge

• Single3.3Vpowersupply

• LVTTLinterface

• Programmableburstlength

– (1, 2, 4, 8, full page)

• Programmableburstsequence:

Sequential/Interleave

• Selfrefreshmodes

• Autorefresh(CBR)

• 4096refreshcyclesevery64ms(Com,Ind,A1

grade) or 16ms (A2 grade)

• Randomcolumnaddresseveryclockcycle

• ProgrammableCAS latency (2, 3 clocks)

• Burstread/writeandburstread/singlewrite

operations capability

• Burstterminationbyburststopandprecharge

command

OPTIONS

• Package:

54-pinTSOPII

54-ballFBGA(8mmx8mm)

• OperatingTemperatureRange

OVERVIEW

bits x 16-bit x 4-bank for improved performance. The

synchronous DRAMs achieve high-speed data transfer

using pipeline architecture. All inputs and outputs signals

refer to the rising edge of the clock input.

1 Meg Bits x 16 Bits x 4 Banks (64-MBIT)

SYNCHRONOUS DYNAMIC RAM

NOVEMBER 2009

KEY TIMING PARAMETERS

Parameter

-5

-6

-7

Unit

ClkCycleTime

CAS

Latency=3

5

6

7

ns

CAS

Latency=2

7.5

7.5

7.5

ns

ClkFrequency

CAS

Latency=3

200

166

143

Mhz

CAS

Latency=2

133

133

133

Mhz

AccessTimefromClock

CAS

Latency=3

5

5.4

5.4

ns

CAS

Latency=2

6

6

6

ns

Parameter

4M x 16

Configuration

1M x 16 x 4

banks

Refresh Count

Com./Ind.

A1

A2

4K/64ms

4K/64ms

4K/16ms

Row Addresses

A0-A11

Column Addresses

A0-A7

Bank Address Pins

BA0, BA1

Auto Precharge Pins

A10/AP

ADDRESS TABLE