SN54AHC244 PACKAGE SN74AHC244 DGV, PACKAGE (TOP VIEW) description

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SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SN54AHC244 PACKAGE SN74AHC244 DGV, PACKAGE (TOP VIEW)
description
These octal buffers/drivers designed specifically improve performance density 3-state memory-address drivers, clock drivers, bus-oriented receivers transmitters. 'AHC244 devices organized 4-bit buffers/line drivers with separate output-enable (OE) inputs. When low, device passes 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.
SN54AHC244 PACKAGE (TOP VIEW)
ORDERING INFORMATION
PDIP SOIC -40°C 85°C SSOP TSSOP- TVSOP CDIP -55°C 125°C LCCC PACKAGE Tube Tube Tape reel Tape reel Tape reel Tape reel Tape reel Tube Tube Tube ORDERABLE PART NUMBER SN74AHC244N SN74AHC244DW SN74AHC244DWR SN74AHC244NSR SN74AHC244DBR SN74AHC244PWR SN74AHC244DGVR SNJ54AHC244J SNJ54AHC244W SNJ54AHC244FK TOP-SIDE MARKING SN74AHC244N AHC244 AHC244 HA244 HA244 HA244 SNJ54AHC244J SNJ54AHC244W SNJ54AHC244FK
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.
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DALLAS, TEXAS 75265
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
FUNCTION TABLE (each 4-bit buffer/driver) 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, Output clamp current, VCC) Continuous output current, VCC) Continuous current through Package thermal impedance, (see Note package 70°C/W package 92°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
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
recommended operating conditions (see Note
SN54AHC244 Supply voltage High-level input voltage Low-level input voltage Input voltage Output voltage High-level output current Low-level output current 3.85 1.65 SN74AHC244 3.85 1.65 UNIT
ns/V
Input transition rise fall rate
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.
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS GND, (OE) GND, 2.58 3.94 0.36 0.36 ±0.1 ±0.25 25°C SN54AHC244 2.48 ±2.5 SN74AHC244 2.48 0.44 0.44 ±2.5 UNIT
products compliant MIL-PRF-38535, this parameter production tested
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
switching characteristics over recommended operating free-air temperature range, (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) (OUTPUT) LOAD CAPACITANCE 25°C 5.8* 5.8* 6.6* 6.6* 10.3 10.3 8.4* 8.4* 10.6* 10.6* 9.7* 9.7* 11.9 11.9 14.1 14.1 1.5** SN54AHC244 12.5* 12.5* 13.5 13.5 SN74AHC244 12.5 12.5 13.5 13.5 UNIT
tsk(o) products compliant MIL-PRF-38535, this parameter production tested. products compliant MIL-PRF-38535, this parameter does apply.
switching characteristics over recommended operating free-air temperature range, (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) (OUTPUT) LOAD CAPACITANCE 25°C 3.9* 3.9* 4.7* 4.7* 5.5* 5.5* 7.3* 7.3* 7.2* 7.2* SN54AHC244 6.5* 6.5* 8.5* 8.5* 8.5* 8.5* 10.5 10.5 10.5 10.5 SN74AHC244 10.5 10.5 10.5 10.5 UNIT
tsk(o) products compliant MIL-PRF-38535, this parameter production tested. products compliant MIL-PRF-38535, this parameter does apply.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
noise characteristics, 25°C (see Note
PARAMETER VOL(P) VOL(V) VOH(V) VIH(D) Quiet output, maximum dynamic Quiet output, minimum dynamic Quiet output, minimum dynamic High-level dynamic input voltage SN74AHC244 -0.2 UNIT
VIL(D) Low-level dynamic input voltage NOTE Characteristics surface-mount packages only.
operating characteristics, 25°C
PARAMETER Power dissipation capacitance TEST CONDITIONS load, UNIT
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
PARAMETER MEASUREMENT INFORMATION
Open
From Output Under Test (see Note
Test Point
From Output Under Test (see Note
TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain
Open
LOAD CIRCUIT TOTEM-POLE OUTPUTS
LOAD CIRCUIT 3-STATE OPEN-DRAIN OUTPUTS Timing Input Data Input VOLTAGE WAVEFORMS SETUP HOLD TIMES tPZL tPZH Output Waveform (see Note tPLZ tPHZ
Input
VOLTAGE WAVEFORMS PULSE DURATION
Input tPLH In-Phase Output tPHL Out-of-Phase Output
tPHL
Output Control
tPLH
Output Waveform (see Note
VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS ENABLE DISABLE TIMES LOW- HIGH-LEVEL ENABLING
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
IMPORTANT NOTICE Texas Instruments Incorporated subsidiaries (TI) reserve right make corrections, modifications, enhancements, improvements, other changes products services time discontinue product service without notice. Customers should obtain latest relevant information before placing orders should verify that such information current complete. products sold subject TI's terms conditions sale supplied time order acknowledgment. warrants performance hardware products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques used extent deems necessary support this warranty. Except where mandated government requirements, testing parameters each product necessarily performed. assumes liability applications assistance customer product design. Customers responsible their products applications using components. minimize risks associated with customer products applications, customers should provide adequate design operating safeguards. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right relating combination, machine, process which products services used. Information published regarding third-party products services does constitute license from such products services warranty endorsement thereof. such information require license from third party under patents other intellectual property third party, license from under patents other intellectual property Reproduction information data books data sheets permissible only reproduction without alteration accompanied associated warranties, conditions, limitations, notices. Reproduction this information with alteration unfair deceptive business practice. responsible liable such altered documentation. Resale products services with statements different from beyond parameters stated that product service voids express implied warranties associated product service unfair deceptive business practice. responsible liable such statements.
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Copyright 2002, Texas Instruments Incorporated

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