MM74HCT244

Octal 3-STATE Buffer

The MM74HCT240 and MM74HCT244 3-STATE buffers utilize advanced silicon-gate CMOS technology and are general purpose high speed inverting and non-inverting buffers. They possess high drive current outputs which enable high speed operation even when driving large bus capacitances. These circuits achieve speeds comparable to low power Schottky devices, while retaining the low power consumption of CMOS. All three devices are TTL input compatible and have a fanout of 15 LS-TTL equivalent inputs.     MM74HCT devices are intended to interface between TTL and NMOS components and standard CMOS devices. These parts are also plug-in replacements for LS-TTL devices and can be used to reduce power consumption in existing designs.     The MM74HCT240 is an inverting buffer and the MM74HCT244 is a non-inverting buffer. Each device has two active low enables (1G and 2G), and each enable independently controls 4 buffers.     All inputs are protected from damage due to static discharge by diodes to VCC and Ground.

Features

  • TTL input compatible
  • Typical propagation delay: 14 ns
  • 3-STATE outputs for connection to system buses
  • Low quiescent current: 80 µA
  • High output drive current: 6 mA (min)
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Index Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
Convention*
Qualification
Support
Compliance
Certificates
0 MM74HCT244MTC Full Production
Green as of Aug 2011
$0.15

TSSOP 20L -  Details
1.2 x 4.4 x 6.5mm,  RAIL

PDF TSSOP 20L  Drawing
Last Update: Jan 2015 PDF MTC20 TSSOP20 Leads, Packing Drawing
Last Update: May 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 MM74HCT244WM Full Production
ROHS Compliant as of 27-Feb-2006
$0.206

SO 20L WB -  Details
2.337 x 7.468 x 15.342mm,  RAIL

PDF SO 20L WB  Drawing
Last Update: Feb 2013 PDF M20B SOW20, Packing Drawing
Last Update: Feb 2015
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2MM74HCT

Line 3244WM

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 MM74HCT244SJ Full Production
ROHS Compliant as of 27-Feb-2006
$0.203

SOP 20L -  Details
1.8 x 5.3 x 12.6mm,  RAIL

PDF SOP 20L  Drawing
Last Update: Jan 2015 PDF M20D SOP EIAJ 20L, Packing Drawing
Last Update: May 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244SJ

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 MM74HCT244MTCX Full Production
Green as of Aug 2011
$0.148

TSSOP 20L -  Details
1.2 x 4.4 x 6.5mm,  TAPE REEL

PDF TSSOP 20L  Drawing
Last Update: Jan 2015 PDF MTC20 TSSOP20 Leads, Packing Drawing
Last Update: May 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 MM74HCT244WMX Full Production
ROHS Compliant as of 27-Feb-2006
$0.26

SO 20L WB -  Details
2.337 x 7.468 x 15.342mm,  TAPE REEL

PDF SO 20L WB  Drawing
Last Update: Feb 2013 PDF M20B SOW20, Packing Drawing
Last Update: Feb 2015
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2MM74HCT

Line 3244WM

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
0 MM74HCT244SJX Full Production
ROHS Compliant as of 27-Feb-2006
$0.239

SOP 20L -  Details
1.8 x 5.3 x 12.6mm,  TAPE REEL

PDF SOP 20L  Drawing
Last Update: Jan 2015 PDF M20D SOP EIAJ 20L, Packing Drawing
Last Update: May 2014
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244SJ

FIT 0.9 @55°C
change temp

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
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This product is general usage and suitable for many different applications.
Application Note Description
AN-310 PDFHigh Speed CMOS (MM74HC) Processing
Last Update : 05-Mar-2011
AN-313 PDFDC Electrical Characteristics of MM74HC High Speed CMOS Logic
Last Update : 05-Mar-2011
AN-368 PDFAn Introduction to and Comparison of 74HCT TTL Compatible CMOS Logic
Last Update : 05-Mar-2011
Package Condition Temperature Range Vcc Range Software Version Revision Date
HSPICE
SO 20L WB Slow 25°C to 150°C 4.5V to 5.5V 97.4 28-Feb-2012
Typical 25°C to 150°C 4.5V to 5.5V 97.4 28-Feb-2012
Fast 25°C to 150°C 4.5V to 5.5V 97.4 28-Feb-2012
IBIS
SO 20L WB Electrical;Fast;Slow;Thermal;Typical -40°C to 85°C 4.5V to 5.5V 2.1 28-Feb-2012
TSSOP 20L Electrical;Fast;Slow;Thermal;Typical -40°C to 85°C 4.5V to 5.5V 2.1 28-Feb-2012

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