参数资料
型号: IDT74SSTU32865BKG
厂商: IDT, Integrated Device Technology Inc
文件页数: 15/15页
文件大小: 0K
描述: IC BUFFER 28BIT 1:2 REG 160TFBGA
产品变化通告: Product Discontinuation 09/Dec/2011
标准包装: 119
逻辑类型: 1:2 寄存缓冲器,带奇偶位
位数: 28
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 160-LFBGA
供应商设备封装: 160-CABGA(9x13)
包装: 托盘
其它名称: 74SSTU32865BKG
9
COMMERCIALTEMPERATURERANGE
IDT74SSTU32865
28-BIT 1:2 REGISTERED BUFFER WITH PARITY
TERMINAL FUNCTIONS
Signal
Terminal
Group
Name
Type
Description
UngatedInputs
DCKE0, DCKE1
SSTL_18
DRAM function pins not associated with Chip Select
DODT0,DODT1
Chip Select
D0:D21
SSTL_18
DRAM inputs, re-driven only when Chip Select is LOW
GatedInputs
ChipSelectInputs
DCS0, DCS1
SSTL_18
DRAM Chip Select signals. These pins initiate DRAM address/command decodes, and as such at
leastonewillbeLOWwhenavalidaddress/commandispresent. Theregistercanbeprogrammed
to re-drive all D-inputs only (CSGateEN HIGH) when at least one Chip Select input is LOW.
Re-DrivenOutputs
Q0A:Q21A
SSTL_18
Outputsoftheregister,validafterthespecifiedclockcountandimmediatelyfollowingarisingedge
Q0B:Q21B
of theclock
QCS0-1A, B
QCKE0-1A, B
QODT0-1A, B
ParityInput
PARIN
SSTL_18
InputparityisreceivedonpinPARIN,andshouldmaintainoddparityacrosstheD0:D21inputs,atthe
risingedgeoftheclock
ParityErrorOutput
PTYERR
OpenDrain
WhenLOW,thisoutputindicatesthataparityerrorwasidentifiedassociatedwiththeaddressand/or
command inputs. PTYERR will be active for two clock cycles, and delayed by an additional clock
cycleforcompatibilitywithfinalparityouttimingontheindustry-standardDDR-IIregisterwithparity(in
JEDECdefinition).
ProgramInputs
CSGateEN
1.8V LVCMOS
ChipSelectGateEnable. WhenHIGH,theD0:D21inputswillbelatchedonlywhenatleastoneChip
SelectinputisLOWduringtherisingedgeoftheclock. WhenLOW,theD0:D21inputswillbelatched
and redriven on every rising edge of the clock.
Clock Inputs
CLK, CLK
SSTL_18
Differentialmasterclockinputpairtotheregister. Theregisteroperationistriggeredbyarisingedgeon
the positive clock input (CLK).
Miscellaneous
MCL, MCH
Must be connected to a Logic LOW or HIGH.
Inputs
RESET
1.8V LVCMOS
AsynchronousResetInput. WhenLOW,itcausesaresetoftheinternallatches,therebyforcingthe
outputs LOW. RESET also resets the PTYERR signal.
VREF
0.9Vnominal
InputreferencevoltageforSSTL_18inputs. Twopins(internallytiedtogether)areusedforincreased
reliability.
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