Operation Inputs Accept Voltages SN54AC244 PACKAGE SN74AC244 PACK

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Operation Inputs Accept Voltages SN54AC244 PACKAGE SN74AC244 PACK

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SN54AC244, SN74AC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
Operation Inputs Accept Voltages
SN54AC244 PACKAGE SN74AC244 PACKAGE (TOP VIEW)
description/ordering information
These octal buffers line drivers designed specifically improve performance density 3-state memory address drivers, clock drivers, bus-oriented receivers transmitters. 'AC244 devices organized 4-bit buffers/drivers with separate output-enable (OE) inputs. When low, device passes noninverted data from inputs outputs. When high, outputs high-impedance state. ensure high-impedance state during power power down, should tied through pullup resistor; minimum value resistor determined current-sinking capability driver.
SN54AC244 PACKAGE (TOP VIEW)
ORDERING INFORMATION
PDIP SOIC -40°C 85°C 40°C SSOP TSSOP CDIP -55°C 125°C LCCC PACKAGE Tube Tube Tape reel Tape reel Tape reel Tape reel Tube Tube Tube ORDERABLE PART NUMBER SN74AC244N SN74AC244DW SN74AC244DWR SN74AC244NSR SN74AC244DBR SN74AC244PWR SNJ54AC244J SNJ54AC244W SNJ54AC244FK TOP-SIDE MARKING SN74AC244N AC244 AC244 AC244 AC244 SNJ54AC244J SNJ54AC244W
SNJ54AC244FK Package drawings, standard packing quantities, thermal data, symbolization, design guidelines available www.ti.com/sc/package.
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet.
Copyright 2002, Texas Instruments Incorporated
products compliant MIL-PRF-38535, parameters tested unless otherwise noted. other products, production processing does necessarily include testing parameters.
PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC244, SN74AC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
FUNCTION TABLE (each buffer) INPUTS OUTPUT
logic diagram (positive logic)
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, -0.5 Input voltage range, (see Note -0.5 Output voltage range, (see Note -0.5 Input clamp current, VCC) Output clamp current, VCC) Continuous output current, VCC) Continuous current through ±200 Package thermal impedance, (see Note package 70°C/W package 58°C/W package 69°C/W package 60°C/W package 83°C/W Storage temperature range, Tstg -65°C 150°C
Stresses beyond those listed under "absolute maximum ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "recommended operating conditions" implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability. NOTES: input output voltage ratings exceeded input output current ratings observed. package thermal impedance calculated accordance with JESD 51-7.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC244, SN74AC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
recommended operating conditions (see Note
SN54AC244 Supply voltage High-level input voltage Low-level input voltage Input voltage Output voltage High-level output current Low-level output current Input transition rise fall rate 3.15 3.85 1.35 1.65 SN74AC244 3.15 3.85 1.35 1.65 ns/V UNIT
Operating free-air temperature NOTE unused inputs device must held ensure proper device operation. Refer application report, Implications Slow Floating CMOS Inputs, literature number SCBA004.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC244, SN74AC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS Data inputs Control inputs GND, VI(OE) GND, 0.25 0.36 0.36 0.36 1.65 1.65 2.56 3.86 4.86 25°C SN54AC244 3.85 3.85 0.44 0.44 0.44 SN74AC244 2.46 3.76 4.76 UNIT
more than output should tested time, duration test should exceed
switching characteristics over recommended operating (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) (OUTPUT)
free-air
temperature
SN74AC244 10.5 11.5
range,
UNIT
25°C 10.5 10.5
SN54AC244 12.5 11.5 12.5
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC244, SN74AC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
switching characteristics over recommended operating (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) (OUTPUT)
free-air
temperature
SN74AC244
range,
UNIT
25°C
SN54AC244 10.5 10.5
operating characteristics, 25°C
PARAMETER Power dissipation capacitance buffer/driver TEST CONDITIONS UNIT
PARAMETER MEASUREMENT INFORMATION
From Output Under Test (see Note Open TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Open
LOAD CIRCUIT
Output Control (low-level enabling) tPZL Output Waveform (see Note tPZH Output Waveform Open (see Note
tPLZ tPHZ
Input tPLH
tPHL
[VCC
Output
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
NOTES: includes probe capacitance. Waveform output with internal conditions such that output except when disabled output control. Waveform output with internal conditions such that output high except when disabled output control. input pulses supplied generators having following characteristics: MHz, outputs measured time with input transition measurement.
Figure Load Circuit Voltage Waveforms
POST OFFICE 655303
DALLAS, TEXAS 75265
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Copyright 2002, Texas Instruments Incorporated

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