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SN74ALVCH16269-SN74ALVCH16269DGGR
12-Bit To 24-Bit Registered Bus Exchanger With 3-State Outputs
DESCRIPTION/ORDERING INFORMATION
DGG OR DL PACKAGE
(TOP VIEW)OEA
OEB1
2B3
GND
GND
A10
A11
A12
VCC
1B1
1B2
GND
1B3
SEL
OEB2
CLKENA2
2B4
GND
2B10
2B11
2B12
1B12
1B11
1B10
GND
1B9
1B8
1B7
VCC
1B6
1B5
GND
1B4
CLKENA1
CLK
NC − No internal connection
SN74ALVCH16269
12-BIT TO 24-BIT REGISTERED BUS EXCHANGER Memberof Texas Instruments Widebus™
Family Operates 1.65Vto 3.6V Maxtpdofat 3.3V 200-V Machine Model (A115-A)This 12-bit to registered bus exchangeris
designed for 1.65-Vto 3.6-V VCC operation.
The SN74ALVCH16269is used in applicationsin
which two separate ports must be multiplexed onto, demultiplexed from,a single port. The deviceis
particularly suitable as an interface between
synchronous DRAMs and high-speed
microprocessors.
Datais stored the internal B-port on the
low-to-high transitionof the clock (CLK) input when
the appropriate (CLKENA) inputs are
low. Proper of these inputs allows two
sequential 12-bit wordsto be presented asa 24-bit
word on theB For data transferin the B-to-A
direction,a single storage registeris provided. The
select (SEL) line selects 1B or 2B data for theA
outputs. The on theA output permits the
fastest possible transfer, extending the period
during which theis valid on the bus. The control
terminals are so that all transactions are
synchronous with CLK. Data flowis controlledby the
active-low output (OEA, OEB1, OEB2).
ORDERING INFORMATION PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKINGTube SN74ALVCH16269DLSSOP-DL ALVCH16269Tape and reel SN74ALVCH16269DLR 85°C TSSOP- DGG Tape and reel SN74ALVCH16269DGGR ALVCH16269
VFBGA- GQL SN74ALVCH16269KRTape and reel VH269- ZQL (Pb-free) 74ALVCH16269ZQLR
(1) Package drawings, packing quantities, symbolization, and PCB design guidelinesare availableat