参数资料
型号: IDT723666L15PF
厂商: IDT, Integrated Device Technology Inc
文件页数: 34/39页
文件大小: 0K
描述: IC FIFO SYNC 8192X36 128QFP
标准包装: 36
系列: 7200
功能: 同步
存储容量: 288K(8K x 36)
数据速率: 67MHz
访问时间: 15ns
电源电压: 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 128-LQFP
供应商设备封装: 128-TQFP(14x20)
包装: 托盘
其它名称: 723666L15PF
4
IDT723656/723666/723676 CMOS TRIPLE BUS SyncFIFOTM 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
Symbol
Name
I/O
Description
A0-A35
Port A Data
I/O
36-bit bidirectional data port for side A.
AEA
Port A Almost-
O
Programmable Almost-Empty flag synchronized to CLKA. It is LOW when the number of words in FIFO2
Empty Flag
is less than or equal to the value in the Almost-Empty A Offset register, X2.
AEB
Port B Almost-
O
Programmable Almost-Empty flag synchronized to CLKB. It is LOW when the number of words in FIFO1
Empty Flag
is less than or equal to the value in the Almost-Empty B Offset register, X1.
AFA
Port A Almost-
O
Programmable Almost-Full flag synchronized to CLKA. It is LOW when the number of empty locations
Full Flag
in FIFO1 is less than or equal to the value in the Almost-Full A Offset register, Y1.
AFC
Port C Almost-
O
Programmable Almost-Full flag synchronized to CLKC. It is LOW when the number of empty locations
Full Flag
in FIFO2 is less than or equal to the value in the Almost-Full C Offset register, Y2.
B0-B17
Port B Data
O
18-bit output data port for side B.
BE/
FWFT
Big-Endian/
I
This is a dual purpose pin. During Master Reset, a HIGH on BE will select Big-Endian operation.
First Word Fall
In this case, depending on the bus size, the most significant byte or word on Port A is read from
Through Select
Port B first (A-to-B data flow) or is written to Port C first (C-to-A data flow). A LOW on BE will select
Little-Endian operation. In this case, the least significant byte or word on Port A is read from Port B first
(A-to-B data flow) or is written to Port C first (C-to-A data flow).
After Master Reset, this pin selects the timing mode. A HIGH on
FWFT selects IDT Standard mode, a
LOW selects First Word Fall Through mode. Once the timing mode has been selected, the level on
FWFT mustbestaticthroughoutdeviceoperation.
C0-C17
Port C Data
I
18-bit input data port for side C.
CLKA
Port A Clock
I
CLKA is a continuous clock that synchronizes all data transfers through Port A and can be
asynchronous or coincident to CLKB.
FFA/IRA, EFA/ORA, AFA, and AEA are all synchronized to
the LOW-to-HIGH transition of CLKA.
CLKB
Port B Clock
I
CLKB is a continuous clock that synchronizes all data transfers through Port B and can be asynchronous
or coincident to CLKA.
EFB/ORB and AEB are synchronized to the LOW-to-HIGH transition of CLKB.
CLKC
Port C Clock
I
CLKC is a continuous clock that synchronizes all data transfers through Port C and can be asynchronous
or coincident to CLKA.
FFC/IRC and AFC are synchronized to the LOW-to-HIGH transition of CLKC.
CSA
Port A Chip
I
CSA must be LOW to enable to LOW-to-HIGH transition of CLKA to read or write on Port A. The A0-A35
Select
outputs are in the high-impedance state when
CSA is HIGH.
CSB
Port B Chip
I
CSB must be LOW to enable a LOW-to-HIGH transition of CLKB to read data on Port B. The B0-B17
Select
outputs are in the high-impedance state when
CSB is HIGH.
EFA/ORA
Port A Empty/
O
This is a dual function pin. In the IDT Standard mode, the
EFA function is selected. EFA indicates
Output Ready
whether or not the FIFO2 memory is empty. In the FWFT mode, the ORA function is selected. ORA
Flag
indicates the presence of valid data on the A0-A35 outputs, available for reading.
EFA/ORA is
synchronized to the LOW-to-HIGH transition of CLKA.
EFB/ORB
Port B Empty/
O
This is a dual function pin. In the IDT Standard mode, the
EFB function is selected. EFB indicates
Output Ready Flag
whether or not the FIFO1 memory is empty. In the FWFT mode, the ORB function is selected. ORB
indicates the presence of valid data on the B0-B17 outputs, available for reading.
EFB/ORBissynchronized
to the LOW-to-HIGH transition of CLKB.
ENA
Port A Enable
I
ENA must be HIGH to enable a LOW-to-HIGH transition of CLKA to read or write data on Port A.
FFA/IRA
Port A Full/
O
This is a dual function pin. In the IDT Standard mode, the
FFA function is selected. FFA indicates
Input Ready Flag
whether or not the FIFO1 memory is full. In the FWFT mode, the IRA function is selected. IRA
indicates whether or not there is space available for writing to the FIFO1 memory.
FFA/IRA is
synchronized to the LOW-to-HIGH transition of CLKA.
FFC/IRC
Port C Full/
O
This is a dual function pin. In the IDT Standard mode, the
FFC function is selected. FFC indicates
Input Ready Flag
whether or not the FIFO2 memory is full. In the FWFT mode, the IRC function is selected. IRC
indicates whether or not there is space available for writing to the FIFO2 memory.
FFC/IRC is
synchronized to the LOW-to-HIGH transition of CLKC.
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