IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFOTM 32,768 x 18 " />
參數(shù)資料
型號(hào)： IDT72V285L20PF
廠商： IDT, Integrated Device Technology Inc
文件頁(yè)數(shù)： 19/25頁(yè)
文件大?。?/td> 0K
描述： IC FIFO SS 65536X18 20NS 64-TQFP
標(biāo)準(zhǔn)包裝： 90
系列： 72V
功能： 異步
存儲(chǔ)容量： 1.1M（65K x 18）
數(shù)據(jù)速率： 50MHz
訪問(wèn)時(shí)間： 20ns
電源電壓： 3 V ~ 3.6 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 64-LQFP
供應(yīng)商設(shè)備封裝： 64-TQFP（14x14）
包裝： 托盤(pán)
其它名稱： 72V285L20PF
3
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFOTM
32,768 x 18 and 65,536 x 18
DESCRIPTION (Continued)
Figure 1. Block Diagram of Single 32,768 x 18 and 65,536 x 18 Synchronous FIFO
DATA OUT (Q0 - Qn)
DATA IN (D0 - Dn)
MASTER RESET (
MRS)
READ CLOCK (RCLK)
READ ENABLE (
REN)
OUTPUT ENABLE (
OE)
EMPTY FLAG/OUTPUT READY (
EF/OR)
PROGRAMMABLE ALMOST-EMPTY (
PAE)
WRITE CLOCK (WCLK)
WRITE ENABLE (
WEN)
LOAD (
LD)
FULL FLAG/INPUT READY (
FF/IR)
PROGRAMMABLE ALMOST-FULL (
PAF)
IDT
72V275
72V285
PARTIAL RESET (
PRS)
FIRST WORD FALL THROUGH/SERIAL INPUT
(FWFT/SI)
RETRANSMIT (
RT)
4512 drw 03
HALF-FULL FLAG (
HF)
SERIAL ENABLE(
SEN)
These FIFOs have five flag pins,
EF/OR (EmptyFlagorOutputReady),
FF/IR (Full Flag or Input Ready), HF (Half-full Flag), PAE (Programmable
Almost-Empty flag) and
PAF(ProgrammableAlmost-Fullflag). TheEFand
FF functions are selected in IDT Standard mode. The IR and OR functions
are selected in FWFT mode.
HF, PAE and PAF are always available for
use, irrespective of timing mode.
PAE and PAF canbeprogrammedindependentlytoswitchatanypoint
in memory. (See Table 1 and Table 2.) Programmable offsets determine the
flag switching threshold and can be loaded by two methods: parallel or serial.
Two default offset settings are also provided, so that
PAEcanbesettoswitch
at 127 or 1,023 locations from the empty boundary and the
PAFthresholdcan
besetat127or1,023locationsfromthefullboundary. Thesechoicesaremade
with the
LD pin during Master Reset.
For serial programming,
SEN together with LD on each rising edge of
WCLK,areusedtoloadtheoffsetregistersviatheSerialInput(SI). Forparallel
programming,
WENtogetherwithLDoneachrisingedgeofWCLK,areused
to load the offset registers via Dn.
RENtogetherwithLDoneachrisingedge
ofRCLKcanbeusedtoreadtheoffsetsinparallelfromQnregardlessofwhether
serial or parallel offset loading has been selected.
DuringMasterReset(
MRS)thefollowingeventsoccur:Thereadandwrite
pointers are set to the first location of the FIFO. The FWFT pin selects IDT
Standard mode or FWFT mode. The
LDpinselectseitherapartialflagdefault
setting of 127 with parallel programming or a partial flag default setting of 1,023
with serial programming. The flags are updated according to the timing mode
anddefaultoffsetsselected.
The Partial Reset (
PRS) also sets the read and write pointers to the first
location of the memory. However, the timing mode, partial flag programming
method,anddefaultorprogrammedoffsetsettingsexistingbeforePartialReset
remain unchanged. The flags are updated according to the timing mode and
offsets in effect.
PRSis useful for resetting a device in mid-operation, when
reprogramming partial flags would be undesirable.
The Retransmit function allows data to be reread from the FIFO more than
once. A LOW on the
RTinputduringarisingRCLKedgeinitiatesaretransmit
operation by setting the read pointer to the first location of the memory array.
If, at any time, the FIFO is not actively performing an operation, the chip will
automatically power down. Once in the power down state, the standby supply
currentconsumptionisminimized. Initiatinganyoperation(byactivatingcontrol
inputs) will immediately take the device out of the power down state.
The IDT72V275/72V285 are fabricated using IDT’s high speed submicron
CMOS technology.
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IDT72V285L20PF8 功能描述:IC FIFO SS 65536X18 20NS 64-TQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72V 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72V285L20TF 功能描述:IC FIFO SS 65536X18 20NS 64STQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72V 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72V285L20TF8 功能描述:IC FIFO SS 65536X18 20NS 64STQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72V 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72V291L10PF 功能描述:IC FIFO SS 32768X36 10NS 64QFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72V 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
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