参数资料
型号: IDT72T18115L5BBI
厂商: IDT, Integrated Device Technology Inc
文件页数: 45/55页
文件大小: 0K
描述: IC FIFO 262KX18 2.5V 5NS 240BGA
标准包装: 1
系列: 72T
功能: 异步
存储容量: 4.7Mb(262k x 18)
数据速率: 10MHz
访问时间: 5ns
电源电压: 2.375 V ~ 2.625 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 240-BGA
供应商设备封装: 240-PBGA(19x19)
包装: 托盘
其它名称: 72T18115L5BBI
5
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72T1845/55/65/75/85/95/105/115/125 2.5V TeraSync 18-BIT/9-BIT FIFO 2Kx18/4Kx9, 4Kx18/
8Kx9, 8Kx18/16Kx9, 16Kx18/32Kx9, 32Kx18/64Kx9, 64Kx18/128Kx9, 128Kx18/256Kx9, 256Kx18/512Kx9, 512Kx18/1Mx9
FEBRUARY 10, 2009
The device can be configured with different input and output bus widths as
shown in Table 1.
A Big-Endian/Little-Endian data word format is provided. This function is
useful when data is written into the FIFO in long word format (x18) and read
out of the FIFO in small word (x9) format. If Big-Endian mode is selected, then
themostsignificantbyte(word)ofthelongwordwrittenintotheFIFOwillberead
outoftheFIFOfirst,followedbytheleastsignificantbyte.IfLittle-Endianformat
is selected, then the least significant byte of the long word written into the FIFO
will be read out first, followed by the most significant byte. The mode desired is
configured during master reset by the state of the Big-Endian (
BE) pin.
The Interspersed/Non-Interspersed Parity (IP) bit function allows the user
to select the parity bit in the word loaded into the parallel port (D0-Dn) when
programming the flag offsets. If Interspersed Parity mode is selected, then the
FIFOwillassumethattheparitybitislocatedinbitpositionsD8duringtheparallel
programming of the flag offsets. If Non-Interspersed Parity mode is selected,
then D8 is assumed to be a valid bit and D16 and D17 are ignored. IP mode
is selected during Master Reset by the state of the IP input pin. This mode is
relevant only when the input width is set to x18 mode.
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.
Both an Asynchronous Output Enable pin (
OE) and Synchronous Read
Chip Select pin (
RCS)areprovidedontheFIFO.TheSynchronousReadChip
SelectissynchronizedtotheRCLK.Boththeoutputenableandreadchipselect
control the output buffer of the FIFO, causing the buffer to be either HIGH
impedance or LOW impedance.
A JTAG test port is provided, here the FIFO has fully functional Boundary
Scan feature, compliant with IEEE 1449.1 Standard Test Access Port and
Boundary Scan Architecture.
The TeraSync FIFO has the capability of operating its ports (write and/or
read) in either LVTTL or HSTL mode, each ports selection independent of the
other. The write port selection is made via WHSTL and the read port selection
via RHSTL. An additional input SHSTL is also provided, this allows the user
to select HSTL operation for other pins on the device (not associated with the
write or read ports).
The IDT72T1845/72T1855/72T1865/72T1875/72T1885/72T1895/
72T18105/72T18115/72T18125 are fabricated using IDT’s high speed sub-
micron CMOS technology.
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