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參數(shù)資料
| 型號： | HD74ALVCHR162269A |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 12-bit to 24-bit Registered Bus Exchanger with 3-state Outputs(三態(tài)輸出的12位至24位寄存總線交換器) |
| 中文描述： | 12位至24位注冊總線交換器與三態(tài)輸出（三態(tài)輸出的12位至24位寄存總線交換器） |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 67K |
| 代理商： | HD74ALVCHR162269A |
HD74ALVCHR162269A
12-bit to 24-bit Registered Bus Exchanger with 3-state Outputs
ADE-205-125 (Z)
Preliminary
1st. Edition
January 1998
Description
The HD74ALVCHR162269A is a 12-bit to 24-bit registered bus exchanger, which is intended for
applications where two separate ports must be multiplexed onto, or de-multiplexed from, a single port. It is
particularly suitable as an interface between synchronous DRAMs and high speed microprocessors. The
HD74ALVCHR162269A is designed specifically for low voltage (from 2.5 V to 3.3 V) V
CC
operation.
Data is stored in the internal B-port registers on the low to high transition of the CLK input, provided that
the appropriate
CLKENA
inputs are low. Proper control of these inputs allows two sequential 12-bit words
to be presented as a 24-bit word on the B-port. For data transfer in the B to A direction, a single storage
register is provided. The
SEL
line selects 1B or 2B data for the A outputs.
The register on the A output permits the fastest possible data transfer, thus extending the period that the
data will be valid on the bus. The control pins are registered so that all transactions are synchronous with
the clock. Data flows is controlled by the active low output enables (
OEA
,
OEB1
,
OEB2
).
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
All outputs, which are designed to sink up to 12 mA, include 26
resistors to reduce overshoot and
undershoot.
Features
All outputs have equivalent 26
series resistors, so no external resistors are required.
Bus hold on data inputs eliminates the need for external pullup / pulldown resistors.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD74ALVCHS162830 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:1-bit to 2-bit Address Driver with 3-state Outputs |
| HD74ALVCHS162830TE | 制造商:Renesas Electronics Corporation 功能描述:FANOUT DRVR 18BIT NON-INV 3-ST CMOS 80TVSOP - Tape and Reel |
| HD74BC240A | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Octal Buffers/Line Drivers With 3 State Outputs |
| HD74BC240AFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Buffer/Driver |
| HD74BC240AFPEL | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Octal Buffers/Line Drivers With 3 State Outputs |
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