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DT72V3674L15PF の電気的特性と機能

DT72V3674L15PFのメーカーはIntegrated Device Technologyです、この部品の機能は「3.3 VOLT CMOS SyncBiFIFOTM WITH BUS-MATCHING 2/048 x 36 x 2 4/096 x 36 x 2 8/192 x 36 x 2」です。


製品の詳細 ( Datasheet PDF )

部品番号 DT72V3674L15PF
部品説明 3.3 VOLT CMOS SyncBiFIFOTM WITH BUS-MATCHING 2/048 x 36 x 2 4/096 x 36 x 2 8/192 x 36 x 2
メーカ Integrated Device Technology
ロゴ Integrated Device Technology ロゴ 




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DT72V3674L15PF Datasheet, DT72V3674L15PF PDF,ピン配置, 機能
3.3 VOLT CMOS SyncBiFIFOTM WITH BUS-MATCHING
2,048 x 36 x 2
4,096 x 36 x 2
8,192 x 36 x 2
IDT72V3654
IDT72V3664
IDT72V3674
FEATURES
Memory storage capacity:
IDT72V3654 – 2,048 x 36 x 2
IDT72V3664 – 4,096 x 36 x 2
IDT72V3674 – 8,192 x 36 x 2
Clock frequencies up to 100 MHz (6.5ns access time)
Two independent clocked FIFOs buffering data in opposite
directions
Select IDT Standard timing (using EFA, EFB, FFA, and FFB flags
functions) or First Word Fall Through Timing (using ORA, ORB,
IRA, and IRB flag functions)
Programmable Almost-Empty and Almost-Full flags; each has five
default offsets (8, 16, 64, 256 and 1,024 )
Serial or parallel programming of partial flags
Port B bus sizing of 36 bits (long word), 18 bits (word) and 9 bits
(byte)
Big- or Little-Endian format for word and byte bus sizes
Retransmit Capability
Master Reset clears data and configures FIFO, Partial Reset
clears data but retains configuration settings
Mailbox bypass registers for each FIFO
Free-running CLKA and CLKB may be asynchronous or coincident
(simultaneous reading and writing of data on a single clock edge
is permitted)
Auto power down minimizes power dissipation
Available in space saving 128-pin Thin Quad Flatpack (TQFP)
Pin and functionally compatible version of the 5V operating
IDT723654/723664/723674
Pin compatible to the lower density parts, IDT72V3624/72V3634/
72V3644
Industrial temperature range (–40°C to +85°C) is available
FUNCTIONAL BLOCK DIAGRAM
CLKA
CSA
W/RA
ENA
MBA
MRS1
PRS1
FFA/IRA
AFA
Port-A
Control
Logic
FIFO1,
Mail1
Reset
Logic
36
Mail 1
Register
36
RAM ARRAY
2,048 x 36
36
4,096 x 36
8,192 x 36
FIFO1
Write
Pointer
Read
Pointer
Status Flag
Logic
MBF1
36
EFB/ORB
AEB
FS2
FS0/SD
FS1/SEN
A0-A35
EFA/ORA
AEA
Programmable Flag
Offset Registers
Timing
Mode
13
FIFO2
Status Flag
Logic
FWFT
B0-B35
FFB/IRB
AFB
RT1
RTM
RT2
36
FIFO1 and
FIFO2
Retransmit
Logic
MBF2
Read
Pointer
Write
Pointer
RAM ARRAY
36 2,048 x 36
4,096 x 36
8,192 x 36
Mail 2
Register
36
36
FIFO2,
Mail2
Reset
Logic
MRS2
PRS2
Port-B
Control
Logic
CLKB
CSB
W/RB
ENB
MBB
BE
BM
SIZE
4664 drw01
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The SyncFIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
1
2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
NOVEMBER 2003
DSC-4664/4

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DT72V3674L15PF pdf, ピン配列
IDT72V3654/72V3664/72V3674 3.3V CMOS SyncBiFIFOTM WITH BUS-MATCHING
2,048 x 36 x 2, 4,096 x 36 x 2 and 8,192 x 36 x 2
COMMERCIALTEMPERATURERANGE
coincident. The enables for each port are arranged to provide a simple
bidirectional interface between microprocessors and/or buses with synchro-
nous control.
Communication between each port may bypass the FIFOs via two mailbox
registers. The mailbox registers’width matchesthe selected Port B buswidth.
Each Mailbox register has a flag (MBF1 and MBF2) to signal when new mail
has been stored.
Two kinds of reset are available on these FIFOs: Master Reset and Partial
Reset. Master Reset initializes the read and write pointers to the first location
of the memory array, configures the FIFO for Big- or Little-Endian byte
arrangement and selects serial flag programming, parallel flag programming,
or one of five possible default flag offset settings, 8, 16, 64, 256 or 1,024. There
are two Master Reset pins, MRS1 and MRS2.
Partial Reset also sets the read and write pointers to the first location of the
memory. Unlike Master Reset, any settings existing prior to Partial Reset (i.e.,
programming method and partial flag default offsets) are retained. Partial Reset
is useful since it permits flushing of the FIFO memory without changing any
configuration settings. Each FIFO has its own, independent Partial Reset pin,
PRS1 and PRS2.
Both FIFO's have Retramsmit capability, when a Retransmit is performed
onarespective FIFO only the read pointer isreset to the first memory location.
ARetransmitisperformedbyusingtheRetransmitMode,RTMpininconjunction
with the Retransmit pins RT1 or RT2, for each respective FIFO. Note that the
two Retransmit pins RT1 and RT2 are muxed with the Partial Reset pins.
These devices have two modes of operation: In theIDT Standard mode,
the first word written to an empty FIFO is deposited into the memory array. A
read operation is required to access that word (along with all other words
residing in memory). In the First Word Fall Through mode (FWFT), the first
word written to an empty FIFO appears automatically on the outputs, no read
operation required (Nevertheless, accessing subsequent words does neces-
sitate a formal read request). The state of the BE/FWFT pin during Master
Reset determines the mode in use.
These devices have two modes of operation: In theIDT Standard mode,
the first word written to an empty FIFO is deposited into the memory array. A
read operation is required to access that word (along with all other words
residing in memory). In the First Word Fall Through mode (FWFT), the first long-
word (36-bit wide) written to an empty FIFO appears automatically on the
outputs, no read operation is required (Nevertheless, accessing subsequent
wordsdoesnecessitateaformalreadrequest).ThestateoftheBE/FWFT pin
during FIFO operation determines the mode in use.
Each FIFO has a combined Empty/Output Ready Flag (EFA/ORA and
EFB/ORB) and a combined Full/Input Ready Flag (FFA/IRA and FFB/
IRB). The EF and FF functions are selected in the IDT Standard mode. EF
indicates whether or not the FIFO memory is empty. FF shows whether the
memory is full or not. The IR and OR functions are selected in the First Word
Fall Through mode. IR indicates whether or not the FIFO has available memory
locations. OR shows whether the FIFO has data available for reading or not.
It marks the presence of valid data on the outputs.
Each FIFO has a programmable Almost-Empty flag (AEA and AEB)
and a programmable Almost-Full flag (AFA and AFB). AEA and AEB
indicate when a selected number of words remain in the FIFO memory. AFA
and AFB indicate when the FIFO contains more than a selected number of
words.
FFA/IRA, FFB/IRB, AFA and AFB are two-stage synchronized to the
port clock that writes data into its array. EFA/ORA, EFB/ORB, AEA and
AEB are two-stage synchronized to the port clock that reads data from its array.
Programmable offsets for AEA, AEB, AFA and AFB are loaded in parallel
using Port A or in serial via the SD input. Five default offset settings are also
provided. The AEA and AEB threshold can be set at 8, 16, 64, 256 or 1,024
locations from the empty boundary and the AFA and AFB threshold can be
set at 8, 16, 64, 256 or 1,024 locations from the full boundary. All these choices
are made using the FS0, FS1 and FS2 inputs during Master Reset.
Interspersed Parity can also be selected during a Master Reset of the
FIFO. If Interspersed Parity is selected then during parallel programming of the
flag offset values, the device will ignore data line A8. If Non-Interspersed Parity
is selected then data line A8 will become a valid bit.
Two or more devices may be used in parallel to create wider data paths.
If, at any time, the FIFO is not actively performing a function, the chip will
automatically power down. During the power down state, supply current
consumption (ICC) is at a minimum. Initiating any operation (by activating control
inputs) will immediately take the device out of the power down state.
The IDT72V3654/72V3664/72V3674 are characterized for operation from
0°C to 70°C. Industrial temperature range (-40°C to +85°C) is available. They
are fabricated using IDT’s high speed, submicron CMOS technology.
3


3Pages


DT72V3674L15PF 電子部品, 半導体
IDT72V3654/72V3664/72V3674 3.3V CMOS SyncBiFIFOTM WITH BUS-MATCHING
2,048 x 36 x 2, 4,096 x 36 x 2 and 8,192 x 36 x 2
COMMERCIALTEMPERATURERANGE
PIN DESCRIPTIONS (CONTINUED)
Symbol
W/RA
W/RB
Name
Port-A Write/
Read Select
Port-B Write/
Read Select
I/O Description
I A HIGH selects a write operation and a LOW selects a read operation on Port A for a LOW-to-HIGH
transition of CLKA. The A0-A35 outputs are in the HIGH impedance state when W/RA is HIGH.
I A LOW selects a write operation and a HIGH selects a read operation on Port B for a LOW-to-HIGH
transition of CLKB. The B0-B35 outputs are in the HIGH impedance state when W/RB is LOW.
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ページ 合計 : 37 ページ
 
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部品番号部品説明メーカ
DT72V3674L15PF

3.3 VOLT CMOS SyncBiFIFOTM WITH BUS-MATCHING 2/048 x 36 x 2 4/096 x 36 x 2 8/192 x 36 x 2

Integrated Device Technology
Integrated Device Technology


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