SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 • • SN54ALS244C, SN54AS244A . . . J PACKAGE SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE (TOP VIEW) 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers pnp Inputs Reduce dc Loading Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND description These octal buffers and line drivers are designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. With the ′ALS240A, ′ALS241C, ′AS240A, and ′AS241A, these devices provide the choice of selected combinations of inverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 2Y4 1A1 1OE VCC SN54ALS244C, SN54AS244A . . . FK PACKAGE (TOP VIEW) 1A2 2Y3 1A3 2Y2 1A4 The -1 version of SN74ALS244C is identical to the standard version, except that the recommended maximum IOL for the -1 version is 48 mA. There is no -1 version of the SN54ALS244C. 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 1Y1 2A4 1Y2 2A3 1Y3 2Y1 GND 2A1 1Y4 2A2 The SN54ALS244C and SN54AS244A are characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74ALS244C and SN74AS244A are characterized for operation from 0°C to 70°C. 2OE • FUNCTION TABLE (each buffer) INPUTS OE A OUTPUT Y L H H L L L H X Z Copyright 1995, 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 SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1OE 2 18 4 16 6 14 8 12 1Y1 1A1 2OE 1Y3 1A2 2A2 2A3 2A4 18 4 16 6 14 8 12 1Y1 1Y2 1Y4 1Y3 EN 1A4 2A1 2 1Y2 1A3 19 1 EN 11 9 13 7 15 5 17 3 1Y4 2Y1 2Y2 2Y3 2OE 19 2Y4 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2A1 2A2 2A3 2A4 11 9 13 7 15 5 17 3 2Y1 2Y2 2Y3 2Y4 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS244C . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74ALS244C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 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. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 recommended operating conditions SN54ALS244C VCC VIH Supply voltage High-level input voltage SN74ALS244C MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 UNIT V V VIL Low level input voltage Low-level 0.8† 0.7‡ IOH High-level output current – 12 – 15 mA IOL Low level output current Low-level 12 24 48§ mA 70 °C TA Operating free-air temperature † Applies over temperature range – 55°C to 70°C ‡ Applies over temperature range 70°C to 125°C § Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V – 55 125 0 0.8 V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VCC = 4.5 4 5 V to 5 5.5 5V VOH VCC = 4 4.5 5V VOL SN54ALS244C TYP¶ MAX TEST CONDITIONS VCC = 4.5 V MIN II = – 18 mA IOH = – 0.4 mA SN74ALS244C TYP¶ MAX MIN – 1.5 VCC – 2 2.4 IOH = – 3 mA IOH = – 12 mA – 1.5 VCC – 2 2.4 3.2 2 0.25 0.4 IOL = 24 mA IOL = 48 mA (-1 version) VCC = 5.5 V, VCC = 5.5 V, VO = 2.7 V VO = 0.4 V II IIH VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V IIL IO# VCC = 5.5 V, VCC = 5.5 V, VI = 0.4 V VO = 2.25 V ICC VCC = 5.5 V V V 2 IOH = – 15 mA IOL = 12 mA IOZH IOZL 3.2 UNIT – 20 0.25 0.4 0.35 0.5 0.35 0.5 V µA 20 20 – 20 – 20 µA 0.1 0.1 mA 20 20 µA – 0.1 – 0.1 mA – 112 mA – 112 – 30 Outputs high 9 18 9 17 Outputs low 15 25 15 24 Outputs disabled 17 29 17 27 mA ¶ All typical values are at VCC = 5 V, TA = 25°C. # The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† TO (OUTPUT) SN54ALS244C tPLH tPHL A Y tPZH tPZL OE Y tPHZ tPLZ OE Y UNIT SN74ALS244C MIN MAX MIN MAX 1 16 2 10 3 12 3 10 1 26 3 20 1 24 3 20 2 10 2 10 1 26 1 13 ns ns ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54AS244A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74AS244A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 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. recommended operating conditions SN54AS244A VCC VIH Supply voltage VIL IOH Low-level input voltage IOL TA 4 High-level input voltage SN74AS244A MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 UNIT V V 0.8 0.8 V High-level output current – 12 – 15 mA Low-level output current 48 64 mA 70 °C Operating free-air temperature – 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 125 0 SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = – 18 mA IOH = – 2 mA VCC = 4.5 V IOH = – 3 mA IOH = – 12 mA VOL VCC = 4 4.5 5V IOZH IOZL VCC = 5.5 V, VCC = 5.5 V, II IIH VCC = 5.5 V, VCC = 5.5 V, IIL OE SN54AS244A TYP† MAX TEST CONDITIONS MIN SN74AS244A TYP† MAX MIN – 1.2 VCC – 2 2.4 – 1.2 VCC – 2 2.4 3.4 3.4 2.4 0.55 IOL = 64 mA VO = 2.7 V 0.55 VO = 0.4 V VI = 7 V VI = 2.7 V 50 50 µA – 50 µA 0.1 0.1 mA 20 20 µA – 0.5 – 0.5 –1 –1 VI = 0 0.4 4V IO‡ VCC = 5.5 V, VO = 2.25 V Outputs high 22 34 22 34 ICC VCC = 5.5 V Outputs low 60 90 60 90 Outputs disabled 34 54 34 54 – 50 V – 50 VCC = 5 5.5 5V V, A V V 2.4 IOH = – 15 mA IOL = 48 mA UNIT – 150 – 50 – 150 mA mA mA † All typical values are at VCC = 5 V, TA = 25°C. ‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A Y tPZH tPZL OE Y tPHZ tPLZ OE Y VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX§ SN54AS244A SN74AS244A MIN MAX MIN MAX 2 9 2 6.2 1 7 1 6.2 1 10 1 9 2 8 2 7.5 1 6.5 1 6 1 10.5 1 9 UNIT ns ns ns § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point From Output Under Test CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.5 V Timing Input Test Point LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V High-Level Pulse 1.3 V R2 1.3 V 1.3 V 0.3 V 0.3 V tsu Data Input tw th 3.5 V 1.3 V 3.5 V Low-Level Pulse 1.3 V 0.3 V 1.3 V 0.3 V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATIONS 3.5 V Output Control (low-level enabling) 1.3 V 1.3 V 0.3 V tPZL Waveform 1 S1 Closed (see Note B) tPLZ [3.5 V 1.3 V tPHZ tPZH Waveform 2 S1 Open (see Note B) 1.3 V VOL 0.3 V VOH 1.3 V 0.3 V [0 V 3.5 V 1.3 V Input 1.3 V 0.3 V tPHL tPLH VOH In-Phase Output 1.3 V 1.3 V VOL tPLH tPHL VOH Out-of-Phase Output (see Note C) 1.3 V 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES 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. When measuring propagation delay items of 3-state outputs, switch S1 is open. D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%. E. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuits and Voltage Waveforms 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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 Lead/Ball Finish MSL Peak Temp (3) 5962-86839012A ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC 5962-8683901RA ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC 5962-8683901SA ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC 5962-9755901Q2A ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC 5962-9755901QRA ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC 5962-9755901QSA ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC JM38510/38303B2A ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC JM38510/38303BRA ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SN54ALS244CJ ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SN54AS244AJ ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SN74ALS244C-1DW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS244C-1DWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS244C-1N ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC SN74ALS244C-1NSR ACTIVE SO NS 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74ALS244CDBLE OBSOLETE SSOP DB 20 None Call TI SN74ALS244CDBR ACTIVE SSOP DB 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74ALS244CDW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS244CDWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS244CN ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC SN74ALS244CNSR ACTIVE SO NS 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74AS244ADW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74AS244ADWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74AS244AN ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC SN74AS244ANSR ACTIVE SO NS 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SNJ54ALS244CFK ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC SNJ54ALS244CJ ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SNJ54ALS244CW ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC SNJ54AS244AFK ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC SNJ54AS244AJ ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SNJ54AS244AW ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC (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. Addendum-Page 1 Call TI PACKAGE OPTION ADDENDUM www.ti.com 28-Feb-2005 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. 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