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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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
Convention*
Qualification
Support
Compliance
Certificates
MM74HCT244MTC Full Production
Green as of Aug 2011
 China RoHS
$0.1946

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: Jan 2016
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244

FIT [Calculate] 0.92 @55°C
MTBF 1.09E9

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
PDF China RoHS
MM74HCT244WM Full Production
Green as of Dec 2015
 China RoHS
$0.266

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: Jan 2016 PDF SOIC Tape And Reel Packing Drawing
Last Update: Jun 2016
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2MM74HCT

Line 3244WM

FIT [Calculate] 0.92 @55°C
MTBF 1.09E9

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
PDF China RoHS
MM74HCT244SJ Full Production
ROHS Compliant as of 27-Feb-2006
 China RoHS
$0.4641

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

PDF SOP 20L  Drawing
Last Update: Nov 2015 PDF M20D SOP EIAJ 20L, Packing Drawing
Last Update: Jan 2016 PDF SOIC TUBE Packing Drawing
Last Update: Sep 2015
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244SJ

FIT [Calculate] 0.92 @55°C
MTBF 1.09E9

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
PDF China RoHS
MM74HCT244MTCX Full Production
Green as of Aug 2011
 China RoHS
$0.1946

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: Jan 2016
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244

FIT [Calculate] 0.92 @55°C
MTBF 1.09E9

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
PDF China RoHS
MM74HCT244WMX Full Production
Green as of Dec 2015
 China RoHS
$0.2695

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: Jan 2016 PDF SOIC Tape And Reel Packing Drawing
Last Update: Jun 2016
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2MM74HCT

Line 3244WM

FIT [Calculate] 0.92 @55°C
MTBF 1.09E9

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
PDF China RoHS
MM74HCT244SJX Full Production
ROHS Compliant as of 27-Feb-2006
 China RoHS
$0.4641

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

PDF SOP 20L  Drawing
Last Update: Nov 2015 PDF M20D SOP EIAJ 20L, Packing Drawing
Last Update: Jan 2016 PDF SOIC TUBE Packing Drawing
Last Update: Sep 2015
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)
&K

Line 2HCT244SJ

FIT [Calculate] 0.92 @55°C
MTBF 1.09E9

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF RoHS IPC1752
XML RoHS IPC1752
PDF RoHS/REACH/JIG
PDF China RoHS
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If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
* Click here for further top mark packaging information for MM74HCT244

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 Typical 25°C to 150°C 4.5V to 5.5V 97.4 28-Feb-2012
Slow 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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Product
Ea
(0.3 - 1.4)
Confidence
(0.6-0.9)
T use (°C)
T Stress (°C)
Kt (eV/K)
Device Hours
@ T Stress
(devices*hours)
Rejects
(devices)
Chi
Square
Acceleration
Factor
FIT @ T use
MTBF @ T
use (hours)
MM74HCT244MTC 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9
MM74HCT244WM 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9
MM74HCT244SJ 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9
MM74HCT244N 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9
MM74HCT244MTCX 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9
MM74HCT244WMX 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9
MM74HCT244SJX 0.7 0.6 55 150 8.62E-05 3850000 0 1.83 259.24 0.92
Run new FIT calculation
1.09E9