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MCM63P818TQ66 bảng dữ liệu(PDF) 1 Page - Motorola, Inc

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Giải thích chi tiết về linh kiện  128K x 36 and 256K x 18 Bit Pipelined BurstRAM Synchronous Fast Static RAM
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nhà sản xuất  MOTOROLA [Motorola, Inc]
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MCM63P736
•MCM63P818
1
MOTOROLA FAST SRAM
Product Preview
128K x 36 and 256K x 18 Bit
Pipelined BurstRAM
Synchronous Fast Static RAM
The MCM63P736 and MCM63P818 are 4M bit synchronous fast static RAMs
designed to provide a burstable, high performance, secondary cache for the
PowerPC
™ and other high performance microprocessors. The MCM63P736 is
organized as 128K words of 36 bits each and the MCM63P818 is organized as
256K words of 18 bits each. These devices integrate input registers, an output
register, a 2–bit address counter, and high speed SRAM onto a single monolithic
circuit for reduced parts count in cache data RAM applications. Synchronous de-
sign 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), sleep mode (ZZ), 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 MCM63P736 and MCM63P818
(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 bytes are designated as “a”, “b”, etc. SBa controls DQa, SBb con-
trols DQb, etc. Individual bytes are written if the selected byte writes SBx are as-
serted with SW. All bytes are written if either SGW is asserted or if all SBx and
SW are asserted.
For read cycles, pipelined SRAMs output data is temporarily stored by an
edge–triggered output register and then released to the output buffers at the next
rising edge of clock (K).
The MCM63P736 and MCM63P818 operate 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 standard JESD8–5 compatible.
• MCM63P736/MCM63P818–133 = 4 ns Access/7.5 ns Cycle (133 MHz)
MCM63P736/MCM63P818–100 = 5 ns Access/10 ns Cycle (100 MHz)
MCM63P736/MCM63P818–66 = 7 ns Access/15 ns Cycle (66 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)
• Two–Cycle Deselect Timing
• Internally Self–Timed Write Cycle
• Byte Write and Global Write Control
• Sleep Mode (ZZ)
• 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.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
Order this document
by MCM63P736/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MCM63P736
MCM63P818
ZP PACKAGE
PBGA
CASE 999–01
TQ PACKAGE
TQFP
CASE 983A–01
10/8/97
© Motorola, Inc. 1997


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