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SN74LV244AT Dataheets PDF



Part Number SN74LV244AT
Manufacturers Texas Instruments
Logo Texas Instruments
Description Octal Buffers/Drivers
Datasheet SN74LV244AT DatasheetSN74LV244AT Datasheet (PDF)

www.ti.com FEATURES • Inputs Are TTL-Voltage Compatible • 4.5-V to 5.5-V VCC Operation • Typical tpd = 5.4 ns at 5 V • Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 5 V, TA = 25°C • Typical VOHV (Output VOH Undershoot) >2.3 V at VCC = 5 V, TA = 25°C • Supports Mixed-Mode Voltage Operation on All Ports DB, DGV, DW, NS, OR PW PACKAGE (TOP VIEW) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 2 3 4 5 6 7 8 9 10 20 VCC 19 2OE 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1 SN74LV244AT O.

  SN74LV244AT   SN74LV244AT



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www.ti.com FEATURES • Inputs Are TTL-Voltage Compatible • 4.5-V to 5.5-V VCC Operation • Typical tpd = 5.4 ns at 5 V • Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 5 V, TA = 25°C • Typical VOHV (Output VOH Undershoot) >2.3 V at VCC = 5 V, TA = 25°C • Supports Mixed-Mode Voltage Operation on All Ports DB, DGV, DW, NS, OR PW PACKAGE (TOP VIEW) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 2 3 4 5 6 7 8 9 10 20 VCC 19 2OE 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 2A1 SN74LV244AT OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCES572C – JUNE 2004 – REVISED AUGUST 2005 • Ioff Supports Partial-Power-Down Mode Operation • Latch-Up Performance Exceeds 250 mA Per JESD 17 • ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) RGY PACKAGE (TOP VIEW) 1OE VCC 1A1 2 2Y4 3 1A2 4 2Y3 5 1A3 6 2Y2 7 1A4 8 2Y1 9 1 10 20 19 2OE 18 1Y1 17 2A4 16 1Y2 15 2A3 14 1Y3 13 2A2 12 1Y4 11 GND 2A1 DESCRIPTION/ORDERING INFORMATION This octal buffer/driver is designed specifically to improve both the performance and density of 3-state memory-address drivers, clock drivers, and bus-oriented receivers and transmitters. The SN74LV244AT is organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. TA –40°C to 85°C ORDERING INFORMATION PACKAGE (1) ORDERABLE PART NUMBER QFN – RGY Reel of 1000 SN74LV244ATRGYR SOIC – DW Tube of 25 Reel of 2000 SN74LV244ATDW SN74LV244ATDWR SOP – NS Reel of 2000 SN74LV244ATNSR SSOP – DB Reel of 2000 SN74LV244ATDBR Tube of 70 SN74LV244ATPW TSSOP – PW Reel of 2000 SN74LV244ATPWR Reel of 250 SN74LV244ATPWT TVSOP – DGV Reel of 2000 SN74LV244ATDGVR TOP-SIDE MARKING VV244 LV244AT 74LV244AT LV244AT LV244AT LV244AT (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2004–2005, Texas Instruments Incorporated SN74LV244AT OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCES572C – JUNE 2004 – REVISED AUGUST 2005 www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) To ensure the high-impedance state during power up or power down, OE shall be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. 1 1OE 1A1 2 FUNCTION TABLE (EACH 4-BIT BUFFER/DRIVER) INPUTS OE A LH LL HX OUTPUT Y H L Z LOGIC DIAGRAM (POSITIVE LOGIC) 19 2OE 18 1Y1 2A1 11 9 2Y1 1A2 4 16 1Y2 2A2 13 7 2Y2 1A3 6 14 1Y3 2A3 15 5 2Y3 1A4 8 12 1Y4 2A4 17 3 2Y4 2 www.ti.com Absolute Maximum Ratings(1) over operating free-air temperature range (unless otherwise noted) SN74LV244AT OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCES572C – JUNE 2004 – REVISED AUGUST 2005 VCC Supply voltage range VI Input voltage range(2) VO Voltage range applied to any output in the high-impedance or power-off state(2) VO Output voltage range applied in the high or low state(2)(3) IIK Input clamp current VI < 0 IOK Output clamp current VO < 0 IO Continuous output current VO = 0 to VCC Continuous current through VCC or GND DB package(4) DGV package(4) θJA Package thermal impedance DW package(4) NS package(4) PW package(4) RGY package(5) Tstg Storage temperature range MIN MAX UNIT –0.5 7 V –0.5 7 V –0.5 7 V –0.5 VCC + 0.5 –20 V mA –50 mA ±35 mA ±70 mA 70 92 58 °C/W 60 83 37 –65 150 °C (1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed. (3) This value is limited to 5.5 V maximum. (4) The package thermal impedance is calculated in accordance with JESD 51-7 (5) The package thermal impedance is calculated in.


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