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Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs



Fairchild Semiconductor 로고
Fairchild Semiconductor
74LCXZ16244MTD 데이터시트, 핀배열, 회로
September 2000
Revised September 2000
74LCXZ16244
Low Voltage 16-Bit Buffer/Line Driver
with 5V Tolerant Inputs and Outputs
General Description
The LCXZ16244 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.
When VCC is between 0 and 1.5V, the LCXZ12644 is in the
high impedance state during power up or power down. This
places the outputs in high impedance (Z) state preventing
intermittent low impedance loading or glitching in bus ori-
ented applications.
The LCXZ16244 is designed for low voltage (2.7V or 3.3V)
VCC applications with capability of interfacing to a 5V signal
environment.
The LCXZ16244 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s Guaranteed power up/down high impedance
s Supports live insertion/withdrawal
s 2.7V–3.6V VCC specifications provided
s 4.5 ns tPD max (VCC = 3.0V), 20 µA ICC max
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
74LCXZ16244MEA
MS48A
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
74LCXZ16244MTD
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)
Inputs
Outputs
© 2000 Fairchild Semiconductor Corporation DS500252
www.fairchildsemi.com


74LCXZ16244MTD 데이터시트, 핀배열, 회로
Truth Tables
Inputs
OE1
I0–I3
LL
LH
HX
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 LCXZ16244 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




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74LCXZ16244MTD driver

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Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs - Fairchild Semiconductor