SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 • • 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC OE B1 B2 B3 B4 B5 B6 B7 B8 RGY PACKAGE (TOP VIEW) A1 A2 A3 A4 A5 A6 A7 A8 DESCRIPTION/ORDERING INFORMATION This octal bus transceiver is designed for 1.65-V to 3.6-V VCC operation. The SN74LVC245A is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses effectively are isolated. VCC • DIR A1 A2 A3 A4 A5 A6 A7 A8 GND 1 20 4 19 OE 18 B1 17 B2 5 6 16 B3 15 B4 7 8 14 B5 13 B6 9 12 B7 2 3 10 11 B8 • DB, DGV, DW, N, NS, OR PW PACKAGE (TOP VIEW) DIR • Operates From 1.65 V to 3.6 V Inputs Accept Voltages to 5.5 V Max tpd of 6.3 ns at 3.3 V Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C Typical VOHV (Output VOH Undershoot) >2 V at VCC = 3.3 V, TA = 25°C Ioff Supports Partial-Power-Down Mode Operation Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC) Latch-Up Performance Exceeds 250 mA Per JESD 17 ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 1000-V Charged-Device Model (C101) GND FEATURES • • • • ORDERING INFORMATION PACKAGE (1) TA Tube of 20 SN74LVC245AN SN74LVC245AN QFN – RGY Reel of 1000 SN74LVC245ARGYR LC245A Tube of 25 SN74LVC245ADW Reel of 2000 SN74LVC245ADWR SOP – NS Reel of 2000 SN74LVC245ANSR LVC245A SSOP – DB Reel of 2000 SN74LVC245ADBR LC245A Tube of 70 SN74LVC245APW Reel of 2000 SN74LVC245APWR Reel of 250 SN74LVC245APWT Reel of 2000 SN74LVC245ADGVR TSSOP – PW TVSOP – DGV VFBGA – GQN VFBGA – ZQN (Pb-Free) (1) TOP-SIDE MARKING PDIP – N SOIC – DW –40°C to 85°C ORDERABLE PART NUMBER Reel of 1000 SN74LVC245AGQNR SN74LVC245AZQNR LVC245A LC245A LC245A LC245A 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 © 1993–2005, Texas Instruments Incorporated SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 DESCRIPTION/ORDERING INFORMATION (CONTINUED) To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in a mixed 3.3-V/5-V system environment. 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. GQN OR ZQN PACKAGE (TOP VIEW) 1 2 3 4 A B C D E TERMINAL ASSIGNMENTS 1 2 3 4 A A1 DIR VCC OE B A3 B2 A2 B1 C A5 A4 B4 B3 D A7 B6 A6 B5 E GND A8 B8 B7 FUNCTION TABLE INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation LOGIC DIAGRAM (POSITIVE LOGIC) DIR 1 19 A1 OE 2 18 B1 To Seven Other Channels Pin numbers shown are for the DB, DGV, DW, N, NS, PW, and RGY packages. 2 SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com Absolute Maximum Ratings SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCC Supply voltage range –0.5 6.5 V VI Input voltage range (2) –0.5 6.5 V –0.5 6.5 V –0.5 VCC + 0.5 state (2) UNIT VO Voltage range applied to any output in the high-impedance or power-off VO Voltage range applied to any output in the high or low state (2) (3) IIK Input clamp current VI < 0 –50 mA IOK Output clamp current VO < 0 –50 mA IO Continuous output current ±50 mA ±100 mA Continuous current through VCC or GND DB package (4) DGV package DW package θJA Package thermal impedance (1) (2) (3) (4) (5) Storage temperature range 92 (4) 58 78 package (4) 69 NS package (4) 60 PW package (4) 83 RGY Tstg 70 (4) GQN/ZQN package (4) N V package (5) °C/W 37 –65 150 °C 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. The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed. The value of VCC is provided in the recommended operating conditions table. The package thermal impedance is calculated in accordance with JESD 51-7. The package thermal impedance is calculated in accordance with JESD 51-5. 3 SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 Recommended Operating Conditions (1) TA = 25°C VCC Supply voltage VIH High-level input voltage Operating Data retention only MIN MAX MIN MAX 1.65 3.6 1.65 3.6 1.5 1.5 0.65 × VCC 0.65 × VCC VCC = 2.3 V to 2.7 V 1.7 1.7 VCC = 2.7 V to 3.6 V 2 2 VCC = 1.65 V to 1.95 V Low-level input voltage VI Input voltage VO Output voltage IOH High-level output current 0.35 × VCC 0.35 × VCC 0.7 0.7 VCC = 2.7 V to 3.6 V 0.8 0.8 IOL Low-level output current ∆t/∆v Input transition rise or fall rate (1) 4 V V 0 5.5 0 5.5 V 0 VCC 0 VCC V VCC = 1.65 V –4 –4 VCC = 2.3 V –8 –8 VCC = 2.7 V –12 –12 VCC = 3 V –24 –24 4 4 VCC = 1.65 V UNIT V VCC = 2.3 V to 2.7 V VCC = 1.65 V to 1.95 V VIL –40°C TO 85°C VCC = 2.3 V 8 8 VCC = 2.7 V 12 12 VCC = 3 V 24 24 10 10 All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. mA mA ns/V SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –100 µA VOH VCC 1.65 V to 3.6 V –40°C TO 85°C TYP MAX MIN MAX VCC – 0.2 VCC – 0.2 IOH = –4 mA 1.65 V 1.29 1.2 IOH = –8 mA 2.3 V 1.9 1.7 2.7 V 2.2 2.2 2.4 IOH = –12 mA VOL TA = 25°C MIN UNIT V 3V 2.4 IOH = –24 mA 3V 2.3 IOL = 100 µA 1.65 V to 3.6 V 0.1 0.2 IOL = 4 mA 1.65 V 0.24 0.45 IOL = 8 mA 2.3 V 0.3 0.7 IOL = 12 mA 2.7 V 0.4 0.4 IOL = 24 mA 3V 0.55 0.55 2.2 V 3.6 V ±1 ±5 µA Ioff VI or VO = 5.5 V 0 ±1 ±10 µA IOZ (1) VO = 0 to 5.5 V 3.6 V ±1 ±10 µA 1 10 1 10 500 500 II Control inputs VI = 0 to 5.5 V VI = VCC or GND ICC IO = 0 3.6 V ≤ VI ≤ 5.5 V (2) One input at VCC – 0.6 V, Other inputs at VCC or GND ∆ICC 3.6 V 2.7 V to 3.6 V µA µA Ci Control inputs VI = VCC or GND 3.3 V 4 pF Cio A or B ports VI = VCC or GND 3.3 V 5.5 pF (1) (2) For I/O ports, the parameter IOZ includes the input leakage current. This applies in the disabled state only. Switching Characteristics over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1) PARAMETER tpd ten tdis FROM (INPUT) A or B OE OE TO (OUTPUT) B or A A or B A or B VCC MIN –40°C TO 85°C TYP MAX MIN MAX 1.8 V ± 0.15 V 1 6 12.2 1 12.7 2.5 V ± 0.2 V 1 3.9 7.8 1 8.3 2.7 V 1 4.2 7.1 1 7.3 3.3 V ± 0.3 V 1.5 3.8 6.1 1.5 6.3 1.8 V ± 0.15 V 1 7 14.8 1 15.3 2.5 V ± 0.2 V 1 4.5 10 1 10.5 2.7 V 1 5.4 9.3 1 9.5 3.3 V ± 0.3 V 1.5 4.4 8.3 1.5 8.5 1.8 V ± 0.15 V 1 7.8 16.5 1 17 2.5 V ± 0.2 V 1 4 9 1 9.5 2.7 V 1 4.4 8.3 1 8.5 1.7 4.1 7.3 1.7 7.5 3.3 V ± 0.3 V tsk(o) TA = 25°C 3.3 V ± 0.3 V 1 UNIT ns ns ns ns 5 SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 Operating Characteristics TA = 25°C TEST CONDITIONS PARAMETER Outputs enabled Cpd Power dissipation capacitance per transceiver f = 10 MHz Outputs disabled 6 VCC TYP 1.8 V 42 2.5 V 43 3.3 V 45 1.8 V 1 2.5 V 1 3.3 V 2 UNIT pF SN74LVC245A OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCAS218T – JANUARY 1993 – REVISED FEBRUARY 2005 PARAMETER MEASUREMENT INFORMATION VLOAD S1 RL From Output Under Test CL (see Note A) Open GND RL TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open VLOAD GND LOAD CIRCUIT INPUTS VCC 1.8 V ± 0.15 V 2.5 V ± 0.2 V 2.7 V 3.3 V ± 0.3 V VI tr/tf VCC VCC 2.7 V 2.7 V ≤2 ns ≤2 ns ≤2.5 ns ≤2.5 ns VM VLOAD CL RL V∆ VCC/2 VCC/2 1.5 V 1.5 V 2 × VCC 2 × VCC 6V 6V 30 pF 30 pF 50 pF 50 pF 1 kΩ 500 Ω 500 Ω 500 Ω 0.15 V 0.15 V 0.3 V 0.3 V VI Timing Input VM 0V tw tsu VI Input VM VM th VI Data Input VM VM 0V 0V VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VI VM Input VM 0V tPLH VOH Output VM VOL tPHL VM VM 0V Output Waveform 1 S1 at VLOAD (see Note B) tPLH tPLZ VLOAD/2 VM tPZH VOH Output VM tPZL tPHL VM VI Output Control VM VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS Output Waveform 2 S1 at GND (see Note B) VOL + V∆ VOL tPHZ VM VOH - V∆ VOH ≈0 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. H. All parameters and waveforms are not applicable to all devices. Figure 1. Load Circuit and Voltage Waveforms 7 PACKAGE OPTION ADDENDUM www.ti.com 28-Feb-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LVC245ADBLE OBSOLETE SSOP DB 20 None Call TI SN74LVC245ADBR ACTIVE SSOP DB 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74LVC245ADGVR ACTIVE TVSOP DGV 20 2000 Pb-Free (RoHS) CU NIPDAU Level-1-250C-UNLIM SN74LVC245ADW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74LVC245ADWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74LVC245AGQNR ACTIVE VFBGA GQN 20 1000 None SNPB SN74LVC245AN ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC SN74LVC245ANSR ACTIVE SO NS 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74LVC245APW ACTIVE TSSOP PW 20 70 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LVC245APWLE OBSOLETE TSSOP PW 20 SN74LVC245APWR ACTIVE TSSOP PW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LVC245APWT ACTIVE TSSOP PW 20 250 CU NIPDAU Level-1-250C-UNLIM SN74LVC245ARGYR ACTIVE QFN RGY 20 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1YEAR SN74LVC245AZQNR ACTIVE VFBGA ZQN 20 1000 SNAGCU Level-1-260C-UNLIM None Pb-Free (RoHS) Pb-Free (RoHS) Lead/Ball Finish Call TI MSL Peak Temp (3) Call TI Level-1-240C-UNLIM Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 28-Feb-2005 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0°–8° 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side. Falls within JEDEC: 24/48 Pins – MO-153 14/16/20/56 Pins – MO-194 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. Falls within JEDEC MO-150 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MECHANICAL DATA MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,30 0,19 0,65 14 0,10 M 8 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 7 0°– 8° A 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 8 14 16 20 24 28 A MAX 3,10 5,10 5,10 6,60 7,90 9,80 A MIN 2,90 4,90 4,90 6,40 7,70 9,60 DIM 4040064/F 01/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. Falls within JEDEC MO-153 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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