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参数资料
| 型号： | IDT723651L20PF |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 4/21页 |
| 文件大小： | 0K |
| 描述： | IC FIFO SYNC 2048X36 120QFP |
| 标准包装： | 45 |
| 系列： | 7200 |
| 功能： | 同步 |
| 存储容量： | 72K（2K x 36） |
| 数据速率： | 50MHz |
| 访问时间： | 20ns |
| 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： | 120-LQFP |
| 供应商设备封装： | 120-TQFP（14x14） |
| 包装： | 托盘 |
| 其它名称： | 723651L20PF |
12
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT723631/723641/723651 CMOS SyncFIFO
512 x 36, 1,024 x 36 and 2,048 x 36
When the FIFO is in retransmit mode and RFM is HIGH, a rising CLKB
edge loads the current read pointer with the shadow read-pointer value
and the OR flag reflects the new level of fill immediately. If the retransmit
changes the FIFO status out of the almost-empty range, up to two CLKB
rising edges after the retransmit cycle are needed to switch
AE high (see
Figure 12). The rising CLKB edge that takes the FIFO out of retransmit
mode shifts the read pointer used by the IR and
AF flags from the shadow
to the current read pointer. If the change of read pointer used by IR and
AF should cause one or both flags to transmit HIGH, at least two CLKA
synchronizing cycles are needed before the flags reflect the change. A
rising CLKA edge after the FIFO is taken out of retransmit mode is the first
synchronizing cycle of IR if it occurs at time tSKEW1 or greater after the
rising CLKB edge (see Figure 13). A rising CLKA edge after the FIFO is
taken out of retransmit mode is the first synchronizing cycle of
AF if it occurs
at time tSKEW2 or greater after the rising CLKB edge (see Figure 14).
MAILBOX REGISTERS
Two 36-bit bypass registers are on the IDT723631/723641/723651 to
pass command and control information between port A and port B. The
Mailbox select (MBA, MBB) inputs choose between a mail register and a
FIFO for a port data transfer operation. A LOW-to-HIGH transition on
CLKA writes A0-A35 data to the mail1 register when a port-A Write is
selected by
CSA, W/RA, and ENA with MBA HIGH. A LOW-to-HIGH
transition on CLKB writes B0-B35 data to the mail2 register when a port-B
Write is selected by
CSB, W/RB, and ENB with MBB HIGH. Writing data to
a mail register sets its corresponding flag (
MBF1 or MBF2) LOW.
Attempted writes to a mail register are ignored while its mail flag is LOW.
When the port-B data (B0-B35) outputs are active, the data on the bus
comes from the FIFO output register when the port-B Mailbox select (MBB)
input is LOW and from the Mail1 register when MBB is HIGH. Mail2 data is
always present on the port-A data (A0-A35) outputs when they are active.
The Mail1 register Flag (
MBF1) is set HIGH by a LOW-to-HIGH transition
on CLKB when a port-B Read is selected by
CSB, W/RB, and ENB with
MBB HIGH. The Mail2 register Flag (MBF2) is set HIGH by a LOW-to-
HIGH transition on CLKA when a port-A Read is selected by
CSA, W/RA,
and ENA with MBA HIGH. The data in a mail register remains intact after it
is read and changes only when new data is written to the register. Mail
Register and Mail Register Flag timing can be found in Figure 15
and 16.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IDT723651L20PF8 | 功能描述:IC FIFO SYNC 2048X36 120QFP RoHS:否 类别:集成电路 (IC) >> 逻辑 - FIFO 系列:7200 标准包装:90 系列:7200 功能:同步 存储容量:288K（16K x 18） 数据速率:100MHz 访问时间:10ns 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:64-LQFP 供应商设备封装:64-TQFP（14x14） 包装:托盘 其它名称:72271LA10PF |
| IDT723651L20PFGI | 制造商:Integrated Device Technology Inc 功能描述:IC FIFO SYNC 2048X36 120QFP |
| IDT723651L20PFGI8 | 制造商:Integrated Device Technology Inc 功能描述:IC FIFO SYNC 2048X36 120QFP |
| IDT723651L20PFI | 功能描述:IC FIFO SYNC 2048X36 120QFP RoHS:否 类别:集成电路 (IC) >> 逻辑 - FIFO 系列:7200 标准包装:15 系列:74F 功能:异步 存储容量:256（64 x 4） 数据速率:- 访问时间:- 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:24-DIP（0.300"，7.62mm） 供应商设备封装:24-PDIP 包装:管件 其它名称:74F433 |
| IDT723651L20PFI8 | 功能描述:IC FIFO SYNC 2048X36 120QFP RoHS:否 类别:集成电路 (IC) >> 逻辑 - FIFO 系列:7200 标准包装:90 系列:7200 功能:同步 存储容量:288K（16K x 18） 数据速率:100MHz 访问时间:10ns 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:64-LQFP 供应商设备封装:64-TQFP（14x14） 包装:托盘 其它名称:72271LA10PF |
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