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74ALVCH16244-74ALVCH16244TTR
LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE) WITH 3.6V TOLERANT INPUTS AND OUTPUTS
1/10February 2003 3.6V TOLERANT INPUTS AND OUTPUTS HIGH SPEED:
tPD= 3.0ns (MAX.)at VCC =3.0to 3.6VPD= 3.7ns (MAX.)atVCC =2.3to 2.7V
tPD= 5.1ns (MAX.)at VCC =1.65V POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:OH|=IOL= 24mA (MIN)atVCC =3.0VOH|=IOL= 12mA (MIN)atVCC =2.3VOH|=IOL =4mA (MIN)atVCC= 1.65V OPERATING VOLTAGE RANGE:CC (OPR)= 1.65Vto 3.6V BUS HOLD PROVIDED ON DATA INPUTS PIN AND FUNCTION COMPATIBLE WITH SERIES 16244 LATCH-UP PERFORMANCE EXCEEDS
300mA (JESD 17) ESD PERFORMANCE:
HBM> 2000V (MIL STD 883 method 3015);> 200V
DESCRIPTIONThe 74ALVCH16244isa low voltage CMOS 16
BIT BUS BUFFER (NON INVERTED) fabricated
with sub-micron silicon gate and five-layer metal
wiringC2 MOS technology.Itis ideal for low power
and very high speed 1.65to 3.6V applications;it
can be interfacedto 3.6V signal environment for
both inputs and outputs.
Any nG output control governs four BUS
BUFFERS. Output Enable input (nG) tied together
gives full 16-bit operation.
When nGis LOW, the outputs are enabled. Whenis HIGH, the output arein high impedance
state.
Active bus-hold circuitry is provided to hold
unusedor floating data inputsata valid logic level.
This deviceis designedto be used with3 state
memory address drivers, etc.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74ALVCH16244LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE)
WITH 3.6V TOLERANT INPUTS AND OUTPUTS
ORDER CODES
PIN CONNECTION
74ALVCH162442/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE: Don‘t Care: High Impedance
IEC LOGIC SYMBOLS
74ALVCH162443/10
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device mayoccur.Functional operation under these conditionsis
not impliedIO absolute maximum rating mustbe observedVO
VCC
RECOMMENDED OPERATING CONDITIONSVIN from 0.8Vto2Vat VCC =3.0V
74ALVCH16244
4/10 SPECIFICATIONS
74ALVCH16244
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)
74ALVCH16244
6/10
TEST CIRCUIT =ZOUTof pulse generator (typically 50Ω)
TEST CIRCUIT AND WAVEFORM SYMBOL VALUE
