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74LCX162244TTR
LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS
1/10February 2003 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED:
tPD= 4.4ns (MAX.)at VCC =3V POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|= IOL= 12mA (MIN)at VCC =3V PCI BUS LEVELS GUARANTEED AT12 mA BALANCED PROPAGATION DELAYS:
tPLH≅ tPHL 26Ω SERIE RESISTORSIN OUTPUTS OPERATING VOLTAGE RANGE:
VCC(OPR)= 2.0Vto 3.6V (1.5V Data
Retention) PIN AND FUNCTION COMPATIBLE WITH SERIES 162244 LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17) ESD PERFORMANCE:
HBM> 2000V (MIL STD 883 method 3015);> 200V
DESCRIPTIONThe 74LCX162244isa low voltage CMOS16 BIT
BUS BUFFER (NON-INVERTED) fabricated with
sub-micron silicon gate and double-layer metal
wiringC2 MOS technology.Itis ideal for low power
and high speed 3.3V applications;it can be
interfacedto5V signal environmentfor both inputs
and outputs.
Any nG output control governs four BUS BUFF-
ERS. Output Enable input (nG) tied together gives
full 16-bit operation.
When nGis LOW, the outputs are on. When nGis
HIGH, the output arein high impedance state.
This deviceis designedto be used with3 state
memory address drivers, etc.
The device circuitsis including 26Ω series resis-
tancein the outputs. These resistors permitto re-
duce line noisein high speed applications.
All inputs and outputs are equipped with protec-
tion circuits against static discharge, giving them
2KV ESD immunity and transient excess voltage.
74LCX162244LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE)
WITH 5V TOLERANT INPUTS AND OUTPUTS
ORDER CODES
PIN CONNECTION
74LCX1622442/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE: Don‘t Care: High Impedance
IEC LOGIC SYMBOLS
74LCX1622443/10
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device mayoccur.Functional operation under these conditionsis
not impliedIO absolute maximum rating mustbe observedVO
RECOMMENDED OPERATING CONDITIONS Truth Table guaranteed: 1.5Vto 3.6VVIN from 0.8Vto2Vat VCC =3.0V
74LCX162244
4/10 SPECIFICATIONS
DYNAMIC SWITCHING CHARACTERISTICS Numberof outputs definedas"n". Measured with "n-1" outputs switching from HIGHto LOWor LOWto HIGH. The remaining outputis
measuredinthe LOW state.
74LCX162244
5/10 ELECTRICAL CHARACTERISTICS Skewis defined astheabsolute value ofthedifference betweenthe actual propagation delayfor anytwo outputsofthe samedevice switch-
inginthe same direction, either HIGHor LOW (tOSLH =|tPLHm -tPLHn|, tOSHL =|tPHLm -tPHLn|) Parameter guaranteedby design
CAPACITIVE CHARACTERISTICS CPD isdefinedasthe valueofthe IC’s internal equivalent capacitance whichis calculatedfrom theoperating current consumption without
load. (Referto Test Circuit). Average operating currentcanbe obtainedbythe following equation. ICC(opr) =CPD xVCC xfIN +ICC/16 (per
circuit)
74LCX162244
6/10
TEST CIRCUIT=50pFor equivalent (includesjig and probe capacitance) =R1= 500Ω or equivalent =ZOUTof pulse generator (typically 50Ω)
WAVEFORM1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
