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MCM69F819ZP7.5 数据表(PDF) 1 Page - Motorola, Inc

部件名 MCM69F819ZP7.5
功能描述  256K x 18 Bit Flow-Through BurstRAM Synchronous Fast Static RAM
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制造商  MOTOROLA [Motorola, Inc]
网页  http://www.freescale.com
标志 MOTOROLA - Motorola, Inc

MCM69F819ZP7.5 数据表(HTML) 1 Page - Motorola, Inc

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MCM69F819
1
MOTOROLA FAST SRAM
256K x 18 Bit Flow–Through
BurstRAM Synchronous
Fast Static RAM
The MCM69F819 is a 4M bit synchronous fast static RAM designed to provide
a burstable, high performance, secondary cache for the PowerPC
™ and other
high performance microprocessors. It is organized as 256K words of 18 bits
each. This device integrates input registers, a 2–bit address counter, and high
speed SRAM onto a single monolithic circuit for reduced parts count in cache
data RAM applications. Synchronous design allows precise cycle control with the
use of an external clock (K).
Addresses (SA), data inputs (DQx), and all control signals except output
enable (G) and linear burst order (LBO) are clock (K) controlled through positive–
edge–triggered noninverting registers.
Bursts can be initiated with either ADSP or ADSC input pins. Subsequent burst
addresses can be generated internally by the MCM69F819 (burst sequence
operates in linear or interleaved mode dependent upon the state of LBO) and
controlled by the burst address advance (ADV) input pin.
Write cycles are internally self–timed and are initiated by the rising edge of the
clock (K) input. This feature eliminates complex off–chip write pulse generation
and provides increased timing flexibility for incoming signals.
Synchronous byte write (SBx), synchronous global write (SGW), and synchro-
nous write enable (SW) are provided to allow writes to either individual bytes or
to all bytes. The two bytes are designated as “a” and “b”. SBa controls DQa and
SBb controls DQb. Individual bytes are written if the selected byte writes SBx are
asserted with SW. All bytes are written if either SGW is asserted or if all SBx and
SW are asserted.
For read cycles, a flow–through SRAM allows output data to simply flow freely
from the memory array.
The MCM69F819 operates from a 3.3 V core power supply and all outputs
operate on a 2.5 V or 3.3 V power supply. All inputs and outputs are JEDEC stan-
dard JESD8–5 compatible.
• MCM69F819–7.5: 7.5 ns Access/ 8.5 ns Cycle (117 MHz)
MCM69F819–8: 8 ns Access/10 ns Cycle (100 MHz)
MCM69F819–8.5: 8.5 ns Access/11 ns Cycle 90 MHz)
MCM69F819–11: 11 ns Access/20 ns Cycle (50 MHz)
• 3.3 V + 10%, – 5% Core Power Supply, 2.5 V or 3.3 V I/O Supply
• ADSP, ADSC, and ADV Burst Control Pins
• Selectable Burst Sequencing Order (Linear/Interleaved)
• Single–Cycle Deselect Timing
• Internally Self–Timed Write Cycle
• Byte Write and Global Write Control
• PB1 Version 2.0 Compatible
• JEDEC Standard 119–Pin PBGA and 100–Pin TQFP Packages
The PowerPC name is a trademark of IBM Corp., used under license therefrom.
Order this document
by MCM69F819/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MCM69F819
ZP PACKAGE
PBGA
CASE 999–02
TQ PACKAGE
TQFP
CASE 983A–01
REV 7
1/22/98
© Motorola, Inc. 1998


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