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参数资料
| 型号： | 72225LB25TFG |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | FIFO |
| 英文描述： | 1K X 18 OTHER FIFO, 15 ns, PQFP64 |
| 封装： | GREEN, PLASTIC, STQFP-64 |
| 文件页数： | 6/16页 |
| 文件大小： | 178K |
| 代理商： | 72225LB25TFG |
14
IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFOTM
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
OCTOBER 22, 2008
OPERATINGCONFIGURATIONS
SINGLE DEVICE CONFIGURATION
AsingleIDT72205LB/72215LB/72225LB/72235LB/72245LBmaybeused
when the application requirements are for 256/512/1,024/2,048/4,096 words
or less. These FIFOs are in a single Device Configuration when the First Load
(
FL), Write Expansion In (WXI) and Read Expansion In (RXI) control inputs
are grounded (Figure 19).
Figure 19. Block Diagram of Single 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18, 4,096 x 18 Synchronous FIFO
NOTE:
1. Do not connect any output control signals directly together.
Figure 20. Block Diagram of 256 x 36, 512 x 36, 1,024 x 36, 2,048 x 36, 4,096 x 36
Synchronous FIFO Memory Used in a Width Expansion Configuration
WIDTH EXPANSION CONFIGURATION
Word width may be increased simply by connecting together the control
signals of multiple devices. Status flags can be detected from any one device.
TheexceptionsaretheEmptyFlagandFullFlag. Becauseofvariationsinskew
between RCLK and WCLK, it is possible for flag assertion and deassertion to
vary by one cycle between FIFOs. To avoid problems the user must create
composite flags by ANDing the Empty Flags of every FIFO, and separately
ANDing all Full Flags. Figure 20 demonstrates a 36-word width by using two
IDT72205LB/72215LB/72225LB/72235LB/72245LBs. Any word width can
be attained by adding additional IDT72205LB/72215LB/72225LB/72235LB/
72245LBs. Please see the Application Note AN-83.
WRITE CLOCK (WCLK)
WRITE ENABLE (
)
READ CLOCK (RCLK)
READ ENABLE (
)
LOAD (
)
OUTPUT ENABLE (
)
DATA IN (D)
DATA OUT (Q)
FULL FLAG (
)
PROGRAMMABLE (
)
HALF FULL FLAG (
)
EMPTY FLAG (
)
PROGRAMMABLE (
)
RESET (
)
72205LB
72215LB
72225LB
72235LB
72245LB
72205LB
72215LB
72225LB
72235LB
72245LB
RESET (
)
36
18
2766 drw 22
FIRST LOAD (
)
READ EXPANSION IN (
)
WRITE EXPANSION IN (
)
WRITE CLOCK (WCLK)
WRITE ENABLE (
)
READ CLOCK (RCLK)
READ ENABLE (
)
LOAD (
)
OUTPUT ENABLE (
)
DATA IN (D0 - D17)
DATA OUT (Q0 - Q17)
FULL FLAG (
)
PROGRAMMABLE (
)
HALF-FULL FLAG (
)
EMPTY FLAG (
)
PROGRAMMABLE (
)
RESET (
)
IDT
72205LB
72215LB
72225LB
72235LB
72245LB
2766 drw 21
FIRST LOAD (
)
READ EXPANSION IN (
)
WRITE EXPANSION IN (
)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 72225LB25TFI | 制造商:Integrated Device Technology Inc 功能描述:FIFO Mem Sync Dual Depth/Width Uni-Dir 1K x 18 64-Pin STQFP 制造商:Integrated Device Technology Inc 功能描述:FIFO SYNC DUAL DEPTH/WIDTH UNI-DIR 1KX18 64TQFP - Rail/Tube |
| 72225LB25TFI8 | 制造商:Integrated Device Technology Inc 功能描述:FIFO Mem Sync Dual Depth/Width Uni-Dir 1K x 18 64-Pin STQFP T/R 制造商:Integrated Device Technology Inc 功能描述:FIFO SYNC DUAL DEPTH/WIDTH UNI-DIR 1KX18 64TQFP - Tape and Reel |
| 72226 | 制造商:Molex 功能描述: |
| 722-26 | 功能描述:高频/射频继电器 26V DC-1GHz .15W RoHS:否 制造商:Omron Electronics 触点形式:2 Form C (DPDT-BM) 触点电流额定值: 线圈电压:5 VDC 线圈类型:Non-Latching 频率: 功耗:100 mW 端接类型:Solder Terminal 绝缘:20 dB to 30 dB at 1 GHz 介入损耗:0.2 dB at 1 GHz |
| 722-26/G | 制造商:Teledyne Relays 功能描述:EM RLY DPDT 1ADC/0.25AAC 26.5VDC 2KOHM TH - Bulk |
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