SN54ALS241C, SN54AS241A, SN74ALS241C, SN74AS241A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS153E – DECEMBER 1982 – REVISED AUGUST 1995 • • SN54ALS241C, SN54AS241A . . . J PACKAGE SN74ALS241C, SN74AS241A . . . 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/drivers are designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The designer has a choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. These devices feature high fan-out and improved fan-in. 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 SN54ALS241C, SN54AS241A . . . FK PACKAGE (TOP VIEW) 1A2 2Y3 1A3 2Y2 1A4 The -1 version of SN74ALS241C is identical to the standard version, except that the recommended maximum IOL of the -1 version is 48 mA. There is no -1 version of the SN54ALS241C. 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 SN54ALS241C and SN54AS241A are characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74ALS241C and SN74AS241A are characterized for operation from 0°C to 70°C. 2OE • FUNCTION TABLES INPUTS 1OE 1A OUTPUT 1Y L H H L L L H X Z INPUTS 2OE 2A OUTPUT 2Y H H H H L L L 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 SN54ALS241C, SN54AS241A, SN74ALS241C, SN74AS241A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS153E – DECEMBER 1982 – REVISED AUGUST 1995 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1 1OE EN 2 18 4 16 6 14 8 12 1Y1 1A1 2OE 2A1 2A2 2A3 2A4 18 4 16 6 14 8 12 1Y1 1Y2 1Y3 1A2 1Y2 1Y4 1A3 19 2 1Y3 EN 11 9 13 7 15 5 17 3 1A4 1Y4 2Y1 2Y2 2Y3 19 2OE 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: SN54ALS241C . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74ALS241C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 SN54ALS241C, SN54AS241A, SN74ALS241C, SN74AS241A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS153E – DECEMBER 1982 – REVISED AUGUST 1995 recommended operating conditions SN54ALS241C VCC VIH Supply voltage VIL IOH Low-level input voltage IOL Low level output current Low-level High-level input voltage SN74ALS241C MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 High-level output current TA Operating free-air temperature † Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V – 55 UNIT V V 0.7 0.8 V – 12 – 15 mA 12 24 48† mA 70 °C 125 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = – 18 mA IOH = – 0.4 mA VCC = 4.5 V IOH = – 3 mA IOH = – 12 mA SN54ALS241C MIN TYP‡ MAX SN74ALS241C MIN TYP‡ MAX – 1.2 – 1.2 VCC – 2 2.4 V V 2 0.25 VOL VCC = 4.5 V IOL = 24 mA IOL = 48 mA (-1 version) IOZH IOZL 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 VCC = 5.5 V 3.2 2 IOH = – 15 mA IOL = 12 mA ICC VCC – 2 2.4 3.2 UNIT 0.4 0.25 0.4 0.35 0.5 0.35 0.5 20 20 µA – 20 – 20 µA 0.1 0.1 mA 20 20 µA – 0.1 mA – 112 mA – 0.1 – 20 V – 112 – 30 Outputs high 9 17 9 18 Outputs low 15 28 15 26 Outputs disabled 17 32 17 30 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 SN54ALS241C, SN54AS241A, SN74ALS241C, SN74AS241A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS153E – DECEMBER 1982 – 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) SN54ALS241C tPLH tPHL A Y tPZH tPZL 1OE Y tPHZ tPLZ 1OE Y tPZH tPZL 2OE Y tPHZ tPLZ 2OE Y UNIT SN74ALS241C MIN MAX MIN MAX 3 31 2 11 1 17 3 10 3 33 3 21 3 27 4 21 2 17 1 10 2 32 2 15 3 38 4 21 3 30 5 21 2 17 2 10 3 35 3 15 ns ns 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: SN54AS241A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74AS241A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 SN54AS241A SN74AS241A MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IOH Low-level input voltage 0.8 0.8 V High-level output current – 12 – 15 mA IOL TA Low-level output current 48 64 mA 70 °C 4 High-level input voltage 2 Operating free-air temperature – 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 125 0 V V SN54ALS241C, SN54AS241A, SN74ALS241C, SN74AS241A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS153E – DECEMBER 1982 – 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 IO‡ VCC = 5.5 V, VCC = 5.5 V, ICC SN54AS241A TYP† MAX TEST CONDITIONS MIN – 1.2 VCC – 2 2.4 – 1.2 VCC – 2 2.4 3.4 3.4 UNIT V V 2.4 IOH = – 15 mA IOL = 48 mA 2.4 0.27 IOL = 64 mA VO = 2.7 V 0.55 0.31 VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0.4 V – 50 0.55 V 50 50 µA – 50 – 50 µA 0.1 0.1 mA 20 20 µA –1 mA – 150 mA –1 VO = 2.25 V Outputs high VCC = 5.5 V SN74AS241A TYP† MAX MIN – 150 – 50 22 35 22 35 Outputs low 61 90 61 90 Outputs disabled 35 56 35 56 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 1OE Y tPHZ tPLZ 1OE Y tPZH tPZL 2OE Y tPHZ tPLZ 2OE Y VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX§ SN54AS241A SN74AS241A 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 2 11 2 10.5 3 9.5 3 8.5 1 7 1 7 2 12 2 12 UNIT ns ns 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 SN54ALS241C, SN54AS241A, SN74ALS241C, SN74AS241A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS153E – DECEMBER 1982 – 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 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. 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