SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level. 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC OE 4A 4B 4Y 3A 3B 3Y SN54ALS257A, SN54ALS258A . . . FK PACKAGE (TOP VIEW) The SN54ALS257A and SN54ALS258A are characterized for operation over the full military temperature range of –55°C to 125°C. The SN74ALS257A, SN74ALS258A, SN74AS257, and SN74AS258 are characterized for operation from 0°C to 70°C. 3 4 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 4A 4B NC 4Y 3A 2Y GND NC 3Y 3B 1B 1Y NC 2A 2B A/B NC VCC OE D SN54ALS257A, SN54ALS258A . . . J PACKAGE SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 . . . D OR N PACKAGE (TOP VIEW) 3-State Outputs Interface Directly With System Bus Provide Bus Interface From Multiple Sources in High-Performance Systems Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 1A D NC – No internal connection FUNCTION TABLE INPUTS OUTPUT Y A B SN54ALS257A SN74ALS257A SN74AS257 DATA OE A /B SN54ALS258A SN74ALS258A SN74AS258 H X X X Z Z L L L X L H L L H X H L L H X L L H L H X H H L 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 1996, 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 SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 logic symbols† SN54ALS257A, SN74ALS257A, SN74AS257 15 OE 1 A /B 1A 1B 2A 2B 3A 3B 4A 4B 15 EN OE G1 A /B 2 3 SN54ALS258A, SN74ALS258A, SN74AS258 1 MUX 1A 4 1Y 1 5 2A 7 6 2Y 11 3Y 14 3B 4A 12 13 2B 3A 9 10 1B 4Y 4B EN 1 G1 2 1 3 MUX 4 1 1Y 5 7 6 2Y 11 9 10 3Y 14 12 13 4Y † These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. logic diagrams (positive logic) SN54ALS257A, SN74ALS257A, SN74AS257 OE A/B 1A 1B 2A 2B 3A 3B 4A 4B SN54ALS258A, SN74ALS258A, SN74AS258 15 OE 1 A /B 2 4 1A 1B 5 2A 2B 11 4 3A 3B 14 4A 5 7 4B 11 9 POST OFFICE BOX 655303 3Y 10 14 12 13 Pin numbers shown are for the D, J, and N packages. 2 2Y 6 4Y 13 1Y 3 3Y 10 12 2 2Y 6 9 1 1Y 3 7 15 • DALLAS, TEXAS 75265 4Y SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 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 Maximum power dissipation at TA = 55°C (in still air) (see Note 1): D package . . . . . . . . . . . . . . . . . . . 1.3 W N package . . . . . . . . . . . . . . . . . . . 1.1 W Operating free-air temperature range, TA: SN54ALS257A, SN54ALS258A . . . . . . . . . . . . . . –55°C to 125°C SN74ALS257A, SN74ALS258A . . . . . . . . . . . . . . . . . 0°C to 70°C 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. NOTE 1: The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils, except for the N package, which has a trace length of zero. recommended operating conditions SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A UNIT MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL IOH Low-level input voltage 0.7 0.8 V High-level output current –1 –2.6 mA IOL TA Low-level output current 12 24 mA 70 °C High-level input voltage 2 Operating free-air temperature –55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 125 0 V V 3 SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER SN54ALS257A SN54ALS258A TEST CONDITIONS MIN VIK VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = –18 mA IOH = –0.4 mA VCC = 4 4.5 5V IOH = –1 mA IOH = –2.6 mA VOH VCC = 4 4.5 5V IOL = 12 mA IOL = 24 mA 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 VOH SN54ALS257A SN54ALS257A, SN74ALS257A VCC = 5.5 V ICC TYP† VCC = 5.5 V MAX MIN TYP† –1.5 VCC–2 2.4 UNIT MAX –1.5 V VCC–2 V 3.3 2.4 0.25 –20 0.4 3.2 0.25 0.4 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 3 8 3 6 Outputs low 8 12 8 12 Outputs disabled 9 14 9 14 2.5 5 2.5 4 Outputs high SN54ALS258A, SN54ALS258A SN74ALS258A SN74ALS257A SN74ALS258A Outputs low 7 11 7 11 Outputs disabled 8 13 8 13 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 or B Any Y tPLH tPHL A /B Any Y tPZH tPZL OE Any Y tPHZ tPLZ OE Any Y VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX§ SN54ALS257A SN74ALS257A MIN MAX MIN MAX 2 12 2 10 2 14 2 12 4 21 6 18 6 25 6 22 3 20 4 16 4 22 5 18 2 12 2 10 2 35 4 15 § For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT ns ns ns ns SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† SN54ALS258A tPLH tPHL A or B Any Y tPLH tPHL A /B Any Y tPZH tPZL OE Any Y tPHZ tPLZ OE Any Y UNIT SN74ALS258A MIN MAX MIN MAX 1 12 2 8 2 9 2 7 4 28 5 25 5 25 6 20 3 20 4 18 5 21 5 18 2 12 2 10 3 37 4 18 ns ns ns ns † For conditions shown 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 Maximum power dissipation at TA = 55°C (in still air) (see Note 1): D package . . . . . . . . . . . . . . . . . . . 1.3 W N package . . . . . . . . . . . . . . . . . . . 1.1 W Operating free-air temperature range, TA: SN74AS257, SN74AS258 . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C 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. NOTE 1: The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils, except for the N package, which has a trace length of zero. recommended operating conditions SN74AS257 SN74AS258 UNIT MIN NOM MAX 4.5 5 5.5 VCC VIH Supply voltage VIL IOH Low-level input voltage 0.8 V High-level output current – 15 mA IOL TA Low-level output current 48 mA 70 °C High-level input voltage 2 Operating free-air temperature 0 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 V V 5 SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN74AS257 SN74AS258 MIN VIK VOH VOL IOZH IOZL II IIH IIL A, B, or OE A/B A, B, or OE A/B A, B, or OE A/B IO‡ SN74AS257 VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = –18 mA IOH = –2 mA VCC = 4.5 V, VCC = 4.5 V, IOH = –15 mA IOL = 48 mA VCC = 5.5 V, VCC = 5.5 V, VO = 2.7 V VO = 0.4 V VCC = 5 5.5 5V V, VI = 7 V VCC = 5 5.5 5V V, VI = 2 2.7 7V VCC = 5 5.5 5V V, VI = 0 0.4 4V VCC = 5.5 V, VO = 2.25 V Outputs high VCC = 5.5 V Outputs low SN74AS258 VCC = 5.5 V UNIT MAX –1.2 VCC – 2 2.4 0.35 0.5 V 50 µA –50 µA 0.1 0.2 20 40 –0.5 –1 –30 V V 3.2 –112 12.1 19.7 19 30.6 19.7 31.9 Outputs high 8.4 13.5 Outputs low 15.2 24.6 Outputs disabled 15.5 Outputs disabled ICC TYP† mA µA mA mA mA 25.2 † 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. 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† UNIT SN74AS257 tPLH tPHL A or B Any Y tPLH tPHL A /B Any Y tPZH tPZL OE Any Y tPHZ tPLZ OE Any Y MIN MAX 1 5.5 1 6 2 11 2 10 2 7.5 2 9.5 1.5 6.5 2 7 ns ns ns ns switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† UNIT SN74AS258 tPLH tPHL A or B Any Y tPLH tPHL A /B Any Y tPZH tPZL OE Any Y tPHZ tPLZ OE Any Y MIN MAX 1 5 1 4 2 9.5 2 10 2 8 2 10 1.5 6 2 6.5 ns ns ns ns † For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 S1 R1 CL (see Note A) 3.5 V High-Level Pulse Test Point From Output Under Test 1.3 V 0.3 V tw R2 3.5 V Low-Level Pulse 1.3 V 1.3 V 0.3 V LOAD CIRCUIT FOR 3-STATE OUTPUTS 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 3.5 V tPZH VOL 0.3 V 0.3 V [0 V 1.3 V 0.3 V tPHL tPLH VOH In-Phase Output 1.3 V 1.3 V VOL tPLH tPHL VOH 1.3 V 1.3 V Input 1.3 V tPHZ Waveform 2 S1 Open (see Note B) 1.3 V 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 8 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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