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參數(shù)資料
| 型號(hào)： | 74FR25900 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 9-Bit, 3-Port Latchable Datapath Multiplexer with 25W Output Series Resistors |
| 中文描述： | 9位，3端口鎖存數(shù)據(jù)通道多路復(fù)用器系列與25瓦的輸出電阻 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大小： | 49K |
| 代理商： | 74FR25900 |
1999 Fairchild Semiconductor Corporation
DS011500
www.fairchildsemi.com
July 1992
Revised August 1999
7
74FR25900
9-Bit, 3-Port Latchable Datapath Multiplexer
with 25
Output Series Resistors
General Description
The 74FR25900 is a data bus multiplexer routing any of
three 9-bit ports to any other one of the three ports. Read-
back of data latched from any port onto itself is also possi-
ble. The 74FR25900 maintains separate control of all latch-
enable, output enable and select inputs for maximum flexi-
bility. PINV allows inversion of the data from the C
8
to A
8
or
B
8
path. This is useful for control of the parity bit in systems
diagnostics.
This device includes 25
resistors in series with A and B
Port outputs. Resistors minimize undershoot and ringing
which may damage or corrupt sensitive device inputs
driven by these ports.
Features
I
25
series resistors in the port A and B outputs elimi-
nate the need for external resistors when driving MOS
inputs such as DRAM arrays
I
9-bit data ports for systems carrying parity bits
I
Readback capability for system self checks.
I
Independent control lines for maximum flexibility
I
Guaranteed multiple output switching and 250 pF load
delays
I
Outputs optimized for dynamic bus drive capability
I
PINV parity control facilitates system diagnostics
I
74FR900 option available without output series resistors
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Pin Description
Connection Diagram
Order Number
74FR25900SSC
Package Number
MS48A
Package Description
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
Pin Names
Description
LExx
Latch Enable Inputs
OE
x
PINV
S
0
, S
1
A
0
–A
8
B
0
–B
8
C
0
–C
8
Output Enable Inputs
Parity Invert Input
Select Inputs
Port A Inputs or 3-STATE Outputs
Port B Inputs or 3-STATE Outputs
Port C Inputs or 3-STATE Outputs
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| 74FR25900SSC | 20 Characters x 4 Lines, 5x7 Dot Matrix Character and Cursor |
| 74FR543 | Octal Latched Transceiver with 3-STATE Outputs |
| 74FR543SPC | Octal Latched Transceiver with 3-STATE Outputs |
| 74FR543SC | Octal Latched Transceiver with 3-STATE Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74FR25900SSC | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 DISC BY MFG 7/03 RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74FR25900SSCX | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 9-Bit Multiplexer RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74FR543 | 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:Octal Latched Transceiver with 3-STATE Outputs |
| 74FR543 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74FR543SC | 制造商:FAIRCHILD 制造商全稱(chēng):Fairchild Semiconductor 功能描述:Octal Latched Transceiver with 3-STATE Outputs |
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