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74VHC16245STN/a1005avai16-BIT BUS TRANSCEIVER (3-STATE)


74VHC16245 ,16-BIT BUS TRANSCEIVER (3-STATE)74VHC1624516-BIT BUS TRANSCEIVERWITH 3-STATE OUTPUTS (NON INVERTED)■ HIGH SPEED: t = 4.0 ns (TYP.) ..
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74VHC16245
16-BIT BUS TRANSCEIVER (3-STATE)
1/10July 2003 HIGH SPEED:tPD= 4.0ns (TYP.)atVCC =5V LOW POWER DISSIPATION:
ICC =4 μA (MAX.)at TA=25°C HIGH NOISE IMMUNITY
VNIH=VNIL=28% VCC (MIN.) POWER DOWN PROTECTION ON INPUTS
&OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:OH|=IOL =8 mA (MIN) BALANCED PROPAGATION DELAYS: PLH≅t PHL OPERATING VOLTAGE RANGE:
VCC(OPR)= 2Vto 5.5V IMPROVED LATCH-UP IMMUNITY LOW NOISE: VOLP= 0.9V (MAX.)
DESCRIPTION

The 74VHC16245is an advanced high-speed
CMOS 16-BIT BUS TRANSCEIVER (3-STATE)
fabricated with sub-micron silicon gate and
double-layer metal wiringC2 MOS technology.
This ICis intended for two-way asynchronous
communication between data busses; the
directionof data transmissionis determined by
DIR input. The enable inputG canbe usedto
disable the device so that the busses are
effectively isolated.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
All floating bus terminals during HighZ State must held HIGHor LOW.
74VHC16245

16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS (NON INVERTED)
ORDER CODES
PIN CONNECTION
74VHC16245
2/10
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
: Don‘t Care: High Impedance
IEC LOGIC SYMBOLS
74VHC16245
3/10
ABSOLUTE MAXIMUM RATINGS

AbsoluteMaximum Ratingsare those values beyond which damagetothe device mayoccur.Functional operation under these conditionsis
not implied
RECOMMENDED OPERATING CONDITIONS
VIN from 30%to 70%of VCC
74VHC16245
4/10 SPECIFICATIONS
74VHC16245
5/10 ELECTRICAL CHARACTERISTICS (Inputtr=tf= 3ns)
(*) Voltage rangeis 3.3V± 0.3V
(**) Voltage rangeis 5.0V± 0.5V
Note1: Parameter guaranteedby design. tsoLH =|tpLHm -tpLHn|, tsoHL =|tpHLm -tpHLn|
CAPACITIVE CHARACTERISTICS
CPD isdefinedasthe valueofthe IC’s internal equivalent capacitance whichis calculatedfrom theoperating current consumption without
load.(Referto Test Circuit). Average operatingcurrentcanbe obtainedbythe followingequation. ICC(opr) =CPD xVCCxfIN+ICC/8 (per circuit)
74VHC16245
6/10
DYNAMIC SWITCHING CHARACTERISTICS
Worst case package. Max numberof outputs definedas(n). Data inputsare driven0Vto 5.0V, (n-1) outputs switching andone outputat GND. Max numberof data inputs(n) switching. (n-1) switching0Vto 5.0V. Inputs undertest switching: 5.0Vto threshold (VILD),0Vto threshold
(VIHD), f=1MHz.
TEST CIRCUIT
=15/ 50pFor equivalent (includesjigand probe capacitance) =R1 =1KΩor equivalent =ZOUTof pulse generator (typically 50Ω
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