SN74BCT2245 OCTAL TRANSCEIVER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS SCBS102C – FEBRUARY 1992 – REVISED MARCH 2003 D D D D DB, DW, N, OR NS PACKAGE (TOP VIEW) Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ B Port Has Equivalent 33-Ω Series Resistors, So No External Resistors Are Required ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) DIR A1 A2 A3 A4 A5 A6 A7 A8 GND description/ordering information 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 The SN74BCT2245 octal transceiver and line/ MOS driver is designed for asynchronous communication between data buses. The device allows data transmission 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 disable the devices so that both buses are effectively isolated. 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. The B-port outputs, which are designed to source or sink up to 12 mA, include 33-Ω series resistors to reduce overshoot and undershoot. ORDERING INFORMATION PDIP – N 0°C to 70°C ORDERABLE PART NUMBER PACKAGE† TA Tube SN74BCT2245N Tube SN74BCT2245DW Tape and reel SN74BCT2245DWR SOP – NS Tape and reel SN74BCT2245NSR SSOP – DB Tape and reel SN74BCT2245DBR SOIC – DW TOP-SIDE MARKING SN74BCT2245N BCT2245 BCT2245 BA245 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation 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. Copyright 2003, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SN74BCT2245 OCTAL TRANSCEIVER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS SCBS102C – FEBRUARY 1992 – REVISED MARCH 2003 logic diagram (positive logic) DIR 1 19 A1 OE 2 18 B1 To Seven Other Channels schematic of A-port outputs schematic of B-port outputs VCC VCC 33 Ω Output Output 33 Ω GND GND All resistor values shown are nominal. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN74BCT2245 OCTAL TRANSCEIVER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS SCBS102C – FEBRUARY 1992 – REVISED MARCH 2003 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . . –0.5 V to 5.5 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC Input clamp current, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA Current into any output in the low state, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 mA Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions (see Note 3) VCC VIH Supply voltage VIL IIK Low-level input voltage High-level input voltage High level output current High-level IOL Low level output current Low-level NOM MAX 4.5 5 5.5 2 Input clamp current IOH MIN UNIT V V 0.8 V –18 mA A port –3 B port –12 A port 24 B port 12 mA mA TA Operating free-air temperature 0 70 °C NOTE 3: 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN74BCT2245 OCTAL TRANSCEIVER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS SCBS102C – FEBRUARY 1992 – REVISED MARCH 2003 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK TEST CONDITIONS VCC = 4.5 V, A port II = –18 mA IOH = –1 mA VCC = 4 4.5 5V IOH = –3 mA IOH = –1 mA VOH VOL B port 5V VCC = 4 4.5 A port VCC = 4.5 V, B port II A or B port IIH‡ Control input IIL‡ A port IOS§ B port A to B ICCL B to A ICCH ICCZ Ci Ciio A to B B to A A to B B to A Control input A to B B to A MIN IOH = –12 mA IOL = 24 mA TYP† 2.5 3.4 2.4 3.3 2.4 3.3 2 MAX UNIT –1.2 V V 3.2 0.35 0.5 VCC = 4 4.5 5V IOL = 1 mA IOL = 12 mA 0.5 VCC = 5.5 V, VI = 5.5 V 0.1 5V VCC = 5 5.5 V, 7V VI = 2 2.7 VCC = 5.5 V, VI = 0.5 V VCC = 5 5.5 5V V, VO = 0 5V VCC = 5 5.5 V, Outputs open VCC = 5 5.5 5V V, Outputs open VCC = 5 5.5 5V V, Outputs open VCC = 5 V, VI = 2.5 V or 0.5 V VCC = 5 V V, V 0.8 70 20 –0.65 –60 –150 –100 –225 63 100 40 64 37 59 29 46 9 15 8 14 7 µA mA mA mA mA mA pF 9 VO = 2 2.5 5 V or 0.5 05V mA pF 12 † All typical values are at VCC = 5 V, TA = 25°C. ‡ For I/O ports, the parameters IIH and IIL include the off-state output current. § Not more than one output should be tested at a time, and the duration of the test should not exceed one second. switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER tPLH tPHL 4 FROM (INPUT) TO (OUTPUT) A B VCC = 5 V, TA = 25°C MIN MAX 4.9 1 5.8 6.1 1.7 7 5.1 6.9 2.5 7.8 4.7 7.1 2.2 7.7 3.2 6.2 8.6 3.2 9.9 A 3.8 7.2 9.5 3.8 11.1 B 5.6 8.3 10.9 5.6 12.2 A 4.2 7.6 10.1 4.2 11.4 B 2.6 5.2 7.1 2.6 8.2 A 3.1 5.7 8 3.1 9.4 B 3.5 6 7.9 3.5 9.2 A 2.3 4.7 6.5 2.3 7.6 MIN TYP MAX B 1 3.3 A 1.7 4.2 A B 2.5 B A 2.2 B tPZH OE tPZL OE tPHZ OE tPLZ OE POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT ns ns ns ns ns ns SN74BCT2245 OCTAL TRANSCEIVER AND LINE/MOS DRIVER WITH 3-STATE OUTPUTS SCBS102C – FEBRUARY 1992 – REVISED MARCH 2003 PARAMETER MEASUREMENT INFORMATION 7 V (tPZL, tPLZ, O.C.) S1 Open (all others) From Output Under Test Test Point CL (see Note A) R1 From Output Under Test R1 Test Point CL (see Note A) R2 LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS RL = R1 = R2 LOAD CIRCUIT FOR 3-STATE AND OPEN-COLLECTOR OUTPUTS High-Level Pulse (see Note B) 3V Timing Input (see Note B) 3V 1.5 V 1.5 V 0V 1.5 V tw 0V Data Input (see Note B) 3V th tsu Low-Level Pulse 3V 1.5 V 1.5 V 0V 1.5 V 1.5 V VOLTAGE WAVEFORMS PULSE DURATION 0V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3V 3V Input (see Note B) 1.5 V 1.5 V 0V tPLH In-Phase Output (see Note D) VOH 1.5 V 1.5 V VOL VOH 1.5 V 1.5 V 0V tPLZ 1.5 V Waveform 1 (see Notes C and D) 3.5 V VOL tPHZ tPLH 1.5 V 1.5 V tPZL tPHL tPHL Out-of-Phase Output (see Note D) Output Control (low-level enable) 0.3 V tPZH Waveform 2 (see Notes C and D) VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (see Note D) VOH 1.5 V 0.3 V 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, tr = tf ≤ 2.5 ns, duty cycle = 50%. C. 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. D. The outputs are measured one at a time with one transition per measurement. E. When measuring propagation delay times of 3-state outputs, switch S1 is open. F. All parameters and waveforms are not applicable to all devices. Figure 1. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 PACKAGE OPTION ADDENDUM www.ti.com 6-Dec-2006 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74BCT2245DBLE OBSOLETE SSOP DB 20 SN74BCT2245DBR ACTIVE SSOP DB 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245DBRE4 ACTIVE SSOP DB 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245DW ACTIVE SOIC DW 20 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245DWE4 ACTIVE SOIC DW 20 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245DWR ACTIVE SOIC DW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245DWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245N ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74BCT2245NE4 ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74BCT2245NSR ACTIVE SO NS 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74BCT2245NSRE4 ACTIVE SO NS 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TBD Lead/Ball Finish Call TI MSL Peak Temp (3) 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 - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. 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. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry 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. 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 1 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 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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