PDM34089SA10QTR 데이터 시트보기 (PDF) - Paradigm Technology

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PDM34089SA10QTR

3.3V 64K x 32 Fast CMOS Synchronous Static RAM with Burst Counter

Paradigm Technology 

PRELIMINARY

PDM34089

3.3V 64K x 32 Fast CMOS

Synchronous Static RAM

1 with Burst Counter

Features

n Interfaces directly with the x86, Pentium™, 680X0

and PowerPC™ processors

n Single 3.3V power supply

n Mode selectable for interleaved or linear burst:

Interleaved for x86 and Pentium

Linear for 680x0 and PowerPC

n Fast access times:

9, 10, 12 and 15 ns

n High-density 64K x 32 architecture with burst

address counter

n Fully registered inputs

n High-output drive: 30 pF at rated TA

n Asynchronous output enable

n Self-timed write cycle

n Separate byte write enables and one global write

enable

n Internal burst read/write address counter

n Internal registers for address, data, controls

n Burst mode selectable

n Sleep mode

n Packages:

100-pin QFP - (Q)

100-pin TQFP - (TQ)

Description

2

The PDM34089 is a 2,097,152 bit synchronous ran-

dom access memory organized as 65,536 x 32 bits. It

3 is designed with burst mode capability and interface

controls to provide high-performance in second

level cache designs for x86, Pentium, 680x0, and

PowerPC microprocessors. Addresses, write data

4 and all control signals except output enable are con-

trolled through positive edge-triggered registers.

Write cycles are self-timed and are also initiated by

the rising edge of the clock. Controls are provided to

5 allow burst reads and writes of up to four words in

length. A 2-bit burst address counter controls the

two least-significant bits of the address during burst

reads and writes. The burst address counter selec-

6 tively uses the 2-bit counting scheme required by the

x86 and Pentium or 680x0 and PowerPC micropro-

cessors as controlled by the mode pin. Individual

write strobes provide byte write for the four 8-bit

bytes of data. An asynchronous output enable sim-

plifies interface to high-speed buses.

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TM i486, Pentium are trademarks of Intel Corp. PowerPC is a trademark of the International Business Machines Corporation.

Rev 1.1 - 5/01/98

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