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參數(shù)資料
| 型號(hào)： | 74FR900 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 9-Bit, 3-Port Latchable Datapath Multiplexer |
| 中文描述： | 9位，3端口鎖存數(shù)據(jù)通路復(fù)用器 |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大?。?/td> | 46K |
| 代理商： | 74FR900 |
1999 Fairchild Semiconductor Corporation
DS010990
www.fairchildsemi.com
May 1992
Revised August 1999
7
74FR900
9-Bit, 3-Port Latchable Datapath Multiplexer
General Description
The 74FR900 is a data bus multiplexer routing any of three
9-bit ports to any other one of the three ports. Readback of
data latched from any port onto itself is also possible. The
74FR900 maintains separate control of all latch-enable,
output enable and select inputs for maximum flexibility.
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.
Fairchild’s 74FR25900 includes 25
resistors in series with
port A and B outputs. Resistors minimize undershoot and
ringing which may damage or corrupt sensitive device
inputs driven by these ports.
Features
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
FR25900 resistor option for driving MOS inputs such as
DRAM arrays
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
74FR900SSC
Package Number
MS48A
Package Description
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
Pin Names
Description
LExx
OE
x
PINV
S
0
, S
1
A
0
–A
8
B
0
–B
8
C
0
–C
8
Latch Enable Inputs
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74FR900SSCX | SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits |
| 74FR9240 | 9-Bit Buffer/Line Driver with 3-STATE Outputs |
| 74FR9240SC | 9-Bit Buffer/Line Driver with 3-STATE Outputs |
| 74FR9240SPC | 20 Characters x 4 Lines, 5x7 Dot Matrix Character and Cursor |
| 74FR9244 | 9-Bit Buffer/Line Driver with 3-STATE Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74FR900SSC | 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 |
| 74FR900SSCX | 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 |
| 74FR9240 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:9-Bit Buffer/Line Driver with 3-STATE Outputs |
| 74FR9240SC | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:9-Bit Buffer/Line Driver with 3-STATE Outputs |
| 74FR9240SCQR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:9-Bit Buffer/Driver |
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