74VHCT244 ,Octal Buffer/Line Driver with TRI-STATE Outputs74VHC244 74VHCT244OctalBuffer/LineDriverwithTRI-STATEOutputs#October199574VHC244 74VHCT244#OctalBuf ..
74VHCT244 ,Octal Buffer/Line Driver with TRI-STATE Outputs74VHC244 74VHCT244OctalBuffer/LineDriverwithTRI-STATEOutputs#October199574VHC244 74VHCT244#OctalBuf ..
74VHCT244 ,Octal Buffer/Line Driver with TRI-STATE Outputs74VHC244 74VHCT244OctalBuffer/LineDriverwithTRI-STATEOutputs#October199574VHC244 74VHCT244#OctalBuf ..
74VHCT244A ,Octal Buffer/Line Driver with 3-STATE OutputsGeneral Descriptiondevice can be used to interface 5V to 3V systems and twoThe VHCT244A is an advan ..
74VHCT244AFT ,74VHC CMOS logic IC seriesabsolute maximum ratings, even briefly, lead to deterioration in IC performance or evendestruction. ..
74VHCT244AM ,OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)General Descriptiondevice can be used to interface 5V to 3V systems and twoThe VHCT244A is an advan ..
892NCF-101M , Fixed Inductors for Surface Mounting
74VHCT244
Octal Buffer/Line Driver with TRI-STATE Outputs
TL/F/11522
74VHC244
74VHCT244
Octal
Buffer/Line
Driver
with
TRI-STATE
Outputs
October 1995
74VHC244# 74VHCT244
Octal Buffer/Line Driver with TRI-STATEÉ Outputs
General Description
The ’VHC/’VHCT244isan advanced high speed CMOSoc-
talbus buffer fabricated with silicon gate C2MOS technolo-
gy.It achieves high speed operation similarto equivalent
Bipolar Schottky TTL while maintainingthe CMOSlow pow- dissipation. The ’VHC/’VHCT244isa non-inverting
TRI-STATE buffer having two active-low output enables.
These devicesare designedtobe usedas TRI-STATE
memory address drivers, clock drivers, andbus oriented
transmitter/receivers. input protection circuit ensures that 0V–7Vcanbeap-
pliedtothe input pins without regardtothe supply voltage.
This devicecanbe usedto interface5Vto3V systemsand
two supply systems suchas battery backup. This circuit
prevents device destructiondueto mismatched supplyand
input voltages.
Features High noise immunity:
VHC VNIHe VNILe 28% VCC (min)
VHCTVIHe 2.0V,VILe 0.8V Power down protection:
VHC inputs only
VHCT inputsand outputs Low noise:
VHC VOLPe 0.6V (typ)
VHCT VOLPe 0.7V (typ) Low power dissipation:
ICCe4mA (max)@TAe 25§C Balanced propagation delays: tPLHj tPHLPinand function compatible with 74HC/HCT244
NOTE:ADD EXTERNAL PULLUP RESISTORTO VHCT OUTPUTSTO
DRIVE CMOS INPUTS
Commercial Package Number PackageDescription
74VHC244M M20B 20-LeadMoldedJEDECSOIC
74VHC244SJ M20D 20-LeadMoldedEIAJSOIC
74VHC244MSC MSC20 20-LeadMoldedEIAJType 1SSOP
74VHC244MTC MTC20 20-LeadMoldedJEDECType 1TSSOP
74VHC244N N20A 20-LeadMoldedDIP
74VHCT244M M20B 20-LeadMoldedJEDECSOIC
74VHCT244SJ M20D 20-LeadMoldedEIAJSOIC
74VHCT244MTC MTC20 20-LeadMoldedJEDECType 1TSSOP
74VHCT244N N20A 20-LeadMoldedDIP
Note:Surface mountpackagesare alsoavailableon TapeandReel.Specifybyappendingthesuffixletter ‘‘X’’totheordering code.
EIAJType1 SSOP availableon TapeandReelonly, order MSCX.
Logic Symbol
IEEE/IEC
TL/F/11522–3
Connection Diagram
Pin Assignmentfor DIP,
SSOP, TSSOPand SOIC
TL/F/11522–1
Truth Tables
Inputs Outputs
OE1 In (Pins12,14,16,18) L H Z
Inputs Outputs
OE2 In (Pins3, 5,7,9) L H Z eHIGHVoltageLevelIe Immateriale LOWVoltageLevel ZeHigh
Impedance
PinNames Description
OE1,OE2 TRI-STATE Output EnableInputs
I0–I7 Inputs
O0–O7 TRI-STATE Outputs
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M125/PrintedinU.S.A.
