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| SN54ALS240A, SN54AS240, SN74ALS240A, SN74AS240 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS214 - D2661, DECEMBER 1982 - REVISED XXXXX 1988 * * * * 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers PNP Inputs Reduce DC Loading Package Options include Plastic Small Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs Dependable Texas instruments Quality and Reliability SN54ALS240A, SN54AS240 . . . J PACKAGE SN74ALS240A, SN74AS240 . . . DW OR N PACKAGE (TOP VIEW) description These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. Taken together with the 'ALS241 and 'AS241, the designer has a choice of selected combinations of inverting and noninverting outputs, symmetrically G (active-low output control) inputs, and complementary G and G inputs. These devices feature high fan-out and improved fan-in. The SN54' family is characterized for operation over the full military temperature range of - 55C to 125C. The SN74' family is characterized for operation from 0C to 70C. 1G 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC 2G 1Y1 A24 1Y2 2A3 1Y3 2A2 1Y4 2A1 SN54ALS240A, SN54AS240 . . . FK PACKAGE (TOP VIEW) 1A2 2Y3 1A3 2Y2 1A4 4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13 2Y4 1A1 1G VCC 2G 1Y1 2A4 1Y2 2A3 1Y3 logic symbol 1G 1A1 1A2 1A3 1A4 1 2 4 6 8 EN 18 16 14 12 1Y1 1Y2 1Y3 1Y4 logic diagram (positive logic) 1G 1A1 1A2 1A3 1A4 1 2 4 6 8 19 11 13 15 17 9 7 5 3 1Y1 1Y2 1Y3 1Y4 18 16 14 12 1Y1 1Y2 1Y3 1Y4 2G 2A1 2A2 2A3 2A4 19 11 13 15 17 EN 2G 9 7 5 3 2Y1 2Y2 2Y3 2Y4 2A3 2A2 2A1 This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2A4 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. Copyright (c) 1988, Texas Instruments Incorporated POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 2Y1 GND 2A1 1Y4 2A2 1 SN54ALS240A, SN74ALS240A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS214 - D2661, DECEMBER 1982 - REVISED XXXXX 1988 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range: SN54ALS240A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74ALS240A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C recommended operating conditions SN54ALS240A MIN VCC VIH VIL IOH IOL TA Supply Voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature -55 4.5 2 0.7 -12 12 125 0 NOM 5 MAX 5.5 SN74ALS240A MIN 4.5 2 0.8 -15 24 70 NOM 5 MAX 5.5 UNIT V V V mA mA C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VOH VCC = 4.5 V, VCC = 4.5 V, VCC = 4.5 V, VOL IOZH IOZL II IIH IIL IO ICC VCC = 4.5 V, VCC = 4.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V TEST CONDITIONS II = - 18 mA IOH = - 0.4 mA IOH = - 3mA IOH = - 12mA IOH = - 15mA IOL = 12 mA IOL = 24 mA VO = 2.7 V VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0.4 V VO = 2.25 V Outputs high Outputs low Outputs disabled - 30 4 13 14 20 - 20 0.1 20 - 0.1 - 112 11 23 25 - 30 4 13 14 0.25 0.4 VCC - 2 2.4 2 2 0.25 0.35 0.4 0.5 20 - 20 0.1 20 - 0.1 - 112 11 23 25 mA mA A mA mA A V 3.2 SN54ALS240A MIN TYP MAX -1.2 VCC - 2 2.4 3.2 V SN74ALS240A MIN TYP MAX -1.2 V UNIT All typical values are at VCC = 5 V, TA = 25C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54ALS240A, SN74ALS240A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS214 - D2661, DECEMBER 1982 - REVISED XXXXX 1988 switching characteristics (see Figure 1) VCC = 5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = 25C 'ALS240A TYP tPLH tPHL tPZH tPZL tPHZ tPLZ A Y Y Y 6 5 9 10 6 7 MIN 2 2 4 5 1 3 VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX SN54ALS240A MAX 22 11 34 26 15 24 SN74ALS240A MIN 2 2 5 5 2 3 MAX 9 9 13 18 10 12 ns ns ns PARAMETER FROM (INPUT) TO (OUTPUT) UNIT G G For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 SN54ALS240A, SN74ALS240A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS214 - D2661, DECEMBER 1982 - REVISED XXXXX 1988 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range: SN54AS240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74AS240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C recommended operating conditions SN54AS240 MIN VCC VIH VIL IOH IOL TA Supply Voltage High-level input voltage Low-level input Voltage High-level output current Low-level output current Operating free-air temperature - 55 4.5 2 0.8 -12 48 125 0 NOM 5 MAX 5.5 SN74AS240 MIN 4.5 2 0.8 -15 64 70 NOM 5 MAX 5.5 UNIT V V V mA mA C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VOH VCC = 4.5 V to 5.5 V, VCC = 4.5 V, VCC = 4.5 V, VOL IOZH IOZL II IIH IIL IO ICC 'AS241A inputs All others VCC = 4.5 V, VCC = 4.75 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5 5 V 5.5 V, VCC = 5.5 V, VCC = 5.5 V TEST CONDITIONS II = - 18 mA IOH = - 2 mA IOH = - 3 mA IOH = - 12 mA IOH = - 15 mA IOL = 48 mA IOL = 64 mA VO = 2.7 V VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0 4 V 0.4 VO = 2.25 V Outputs high Outputs low Outputs disabled - 50 11 51 24 0.27 0.55 0.31 50 - 50 0.1 20 -1 - 0.5 - 150 17 75 38 -50 11 51 24 0.55 50 - 50 0.1 20 -1 - 0.5 - 150 17 75 38 mA VCC - 2 2.4 2.4 2.4 V A A mA A mA mA 3.4 SN54AS240 MIN TYP MAX - 1.2 VCC - 2 2.4 3.4 V SN74AS240 MIN TYP MAX - 1.2 UNIT V All typical values are at VCC = 5 V, TA = 25C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54ALS240A, SN74ALS240A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS214 - D2661, DECEMBER 1982 - REVISED XXXXX 1988 switching characteristics (see Figure 1) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX SN54AS240 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ A Y Y Y 2 2 2 2 2 2 MAX 7 6 7 9.5 5.5 12.5 SN74AS240 MIN 2 2 2 2 2 2 MAX 6.5 5.7 6.4 9 5 9.5 NS NS NS PARAMETER FROM (INPUT) TO (OUTPUT) UNIT 1G G For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 SN54ALS240A, SN74ALS240A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS214 - D2661, DECEMBER 1982 - REVISED XXXXX 1988 PARAMETER MEASUREMENT INFORMATION 7V RL = R1 = R2 S1 R1 From Output Under Test CL (see Note A) R2 Test Point LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V Input tPLH In-Phase Output (see Note D) 1.3 V 1.3 V 1.3 V 0.3 V tPHL VOH 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES Waveform 2 S1 Open (see Note B) Waveform 1 S1 Closed (see Note B) tPZH Output Control (low-level enabling) tPZL 1.3 V 3.5 V 1.3 V 1.3 V 0.3 V tPLZ 3.5 V 0.3 V VOL tPHZ VOH 1.3 V 0.3 V 0V VOLTAGE WAVEFORMS . ENABLE AND DISABLE TIMES. 3-STATE OUTPUTS 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 have the following characteristics: PRR 1 MHz, tr = tf = 2 ns, duty cycle = 50%. D. When measuring propagation delay items of 3-state outputs, switch S1 is open. E. The outputs are measured one at a time with one input transition per measurement. Figure 1 6 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof. Copyright (c) 1998, Texas Instruments Incorporated |
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