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Fairchild Semiconductor Electronic Components Datasheet

74LCXH16244 Datasheet

Low Voltage 16-Bit Buffer/Line Driver

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September 2000
Revised September 2000
74LCXH16244
Low Voltage 16-Bit Buffer/Line Driver with Bushold
General Description
The LCXH16244 contains sixteen non-inverting buffers
with 3-STATE outputs designed to be employed as a mem-
ory and address driver, clock driver, or bus oriented trans-
mitter/receiver. The device is nibble controlled. Each nibble
has separate 3-STATE control inputs which can be shorted
together for full 16-bit operation.
The LCXH16244 data inputs include active bushold cir-
cuitry, eliminating the need for external pull-up resistors to
hold unused or floating data inputs at a valid logic level.
The LCXH16244 is designed for low voltage (2.5V or 3.3V)
VCC applications with capability of interfacing to a 5V signal
environment.
The LCXH16244 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
s 5V tolerant control inputs and outputs
s 2.3V–3.6V VCC specifications provided
s 4.5 ns tPD max (VCC = 3.0V), 20 µA ICC max
s Bushold on inputs eliminates the need for external
pull-up/pull-down resistors
s Power down high impedance inputs and outputs
s ±24 mA output drive (VCC = 3.0V)
s Implements patented noise/EMI reduction circuitry
s Latch-up performance exceeds 500 mA
s ESD performance:
Human body model > 2000V
Machine model > 200V
Ordering Code:
Order Number Package Number
Package Description
74LCXH16244MEA
MS48A
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
74LCXH16244MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter Xto the ordering code.
Connection Diagram
Logic Symbol
Pin Descriptions
Pin Names
OEn
I0I15
O0O15
Description
Output Enable Input (Active LOW)
Bushold Inputs
Outputs
© 2000 Fairchild Semiconductor Corporation DS500248
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

74LCXH16244 Datasheet

Low Voltage 16-Bit Buffer/Line Driver

No Preview Available !

Truth Tables
Inputs
OE1
L
L
H
I0–I3
L
H
X
Outputs
O0–O3
L
H
Z
Inputs
OE3
L
L
H
I8–I11
L
H
X
Outputs
O8–O11
L
H
Z
Inputs
Outputs
OE2
L
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
I4–I7
L
H
X
O4–O7
L
H
Z
Functional Description
The LCXH16244 contains sixteen non-inverting buffers
with 3-STATE standard outputs. The device is nibble
(4 bits) controlled with each nibble functioning identically,
but independent of the other. The control pins can be
shorted together to obtain full 16-bit operation. The
Logic Diagram
Inputs
OE4
L
L
H
X = Immaterial
Z = High Impedance
I12–I15
L
H
X
Outputs
O12–O15
L
H
Z
3-STATE outputs are controlled by an Output Enable (OEn)
input for each nibble. When OEn is LOW, the outputs are in
2-state mode. When OEn is HIGH, the outputs are in the
high impedance mode, but this does not interfere with
entering new data into the inputs.
www.fairchildsemi.com
2


Part Number 74LCXH16244
Description Low Voltage 16-Bit Buffer/Line Driver
Maker Fairchild Semiconductor
Total Page 9 Pages
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