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參數(shù)資料
| 型號(hào)： | IDTQS34XST253Q38 |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 編、解碼器及復(fù)用、解復(fù)用 |
| 英文描述： | OCTAL 1 LINE TO 4 LINE MULTIPLEXER AND DEMUX/DECODER, TRUE OUTPUT, PDSO80 |
| 封裝： | 0.150 INCH, MILLIPAK, DIP-80 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 128K |
| 代理商： | IDTQS34XST253Q38 |
1
IDTQS34XST253
HIGH-SPEED CMOS SYNCHROSWITCH 32:8 MUX/DEMUX
INDUSTRIALTEMPERATURERANGE
NOVEMBER 1999
1999
Integrated Device Technology, Inc.
DSC-5531/-
c
IDTQS34XST253
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH PRODUCTS
HIGH-SPEED CMOS
SYNCHROSWITCH 32:8 MUX/DEMUX
WITH ACTIVE TERMINATORS
DESCRIPTION:
The QS34XST253 is a high-speed CMOS 32:8 multiplexer/demultiplexer
with active terminators (bus-hold circuits) on the demux side. It is organized
as four independent dual 4:1 mux/demux blocks. Port selection and
connection, controlled by SEL signals, can be either asynchronous or
synchronous. In the synchronous mode, the A, B, C, or D port to Y port
connection is updated on the rising edge of the input clock CLK. Once the
port-to-port connection is made, data flow can be bi-directional with a typical
250ps propagation delay through the switch. Clock Enable, overriding
Asynchronous Enable, and Asynchronous Select controls provide addi-
tional design flexibility.
The bus-hold circuits latch the last data driven on the demux side,
providing infinite hold time and glitch-free signal transitions. Synchronous
controls and bus-hold ease timing constraints in many high speed data mux/
demux applications, such as bank interleaving. The QS34XST253 is
available in the space-saving, 80-pin dual-in-line MillipaQ package.
The QS34XST253 is characterized for operation at -40°C to +85°C.
Yn0
Yn1
An0
Bn0
Cn0
An1
Cn1
Dn0
Bn1
Dn1
T
=
R
CLKn
CLKENn
OEn0
SY NCn
OEn1
SE Ln0
CO NTR OL
LO GIC
SE Ln1
NOTE: One of four blocks shown.
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
Enhanced N channel FET with no inherent diode to Vcc
Bidirectional signal flow
Flow-through pinout
Zero propagation delay, zero ground bounce
8 banks of 4:1 Mux/Demux
Port select synchronous to the clock
Clock enable and asynchronous enable
“Bus-hold” terminators on the Demux side
Undershoot clamp diodes on all switch and control pins
Asynchronous SEL option
Break-before-make feature
Available in 80-pin MillipaQ (Q3)
Bus-hold eliminates floating bus lines and reduces static power
consumption
APPLICATIONS
Video, audio, graphics switching, muxing
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