
M54HC245K1 ,RAD-HARD OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (NON INVERTED)M54HC245RAD-HARD OCTAL BUS TRANSCEIVERWITH 3 STATE OUTPUTS (NON INVERTED)
M54HC245K1
RAD-HARD OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (NON INVERTED)
1/10April 2004 HIGH SPEED:
tPD= 10ns (TYP.)at VCC =6V LOW POWER DISSIPATION:
ICC =4μA(MAX.)at TA=25°C HIGH NOISE IMMUNITY:NIH =VNIL= 28%VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE:OH|=IOL =6mA (MIN) BALANCED PROPAGATION DELAYS:
tPLH≅ tPHL WIDE OPERATING VOLTAGE RANGE:CC (OPR)= 2Vto 6V PIN AND FUNCTION COMPATIBLE WITH SERIES 245 SPACE GRADE-1: ESA SCC QUALIFIED 50 krad QUALIFIED, 100 krad AVAILABLE ON
REQUEST NO SEL UNDER HIGH LET HEAVY IONS
IRRADIATION DEVICE FULLY COMPLIANT WITH
SCC-9405-013
DESCRIPTIONThe M54HC245 is an advanced high-speed
CMOS OCTAL BUS TRANSCEIVER (3-STATE)
fabricated with silicon gateC2 MOS technology.
This ICis intended for two-way asynchronous
communication between data buses, and the
directionof data transmissionis determined by
DIR input. The enable inputG can beusedto
disable the deviceso that the buses are effectively
isolated.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
All floating bus terminals during HighZ State must held HIGHor LOW.
M54HC245RAD-HARD OCTAL BUS TRANSCEIVER
WITH3 STATE OUTPUTS (NON INVERTED)
PIN CONNECTION
ORDER CODES
M54HC2452/10
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE: Don’t Care: High Impedance
M54HC2453/10
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device mayoccur.Functional operation under these conditionsis
not implied
RECOMMENDED OPERATING CONDITIONS
M54HC2454/10
SPECIFICATIONS
M54HC245
5/10 ELECTRICAL CHARACTERISTICS(CL=50 pF, Inputtr=tf =6ns)
CAPACITIVE CHARACTERISTICS CPD isdefinedasthe valueofthe IC’s internal equivalent capacitance whichis calculatedfrom theoperating current consumption without
load.(Refer toTestCircuit). Averageoperating current canbeobtainedbythe followingequation. ICC(opr) =CPD xVCCxfIN+ICC/8(percircuit)
M54HC245
6/10
TEST CIRCUIT= 50pF/150pFor equivalent (includesjigand probe capacitance) =1KΩor equivalent =ZOUTof pulse generator (typically 50Ω)
WAVEFORM1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)