74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049B – MARCH 1989 – REVISED JUNE 1996 D D D D D D D 3-State Outputs Interface Directly With System Bus Flow-Through Architecture Optimizes PCB Layout Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise EPICt (Enhanced-Performance Implanted CMOS) 1-mm Process 500-mA Typical Latch-Up Immunity at 125°C Provides Bus Interface From Multiple Sources in High-Performance Systems Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (N) DW OR N PACKAGE (TOP VIEW) A/B 1Y 2Y GND GND GND GND 3Y 4Y OE 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 1A 1B 2A 2B VCC VCC 3A 3B 4A 4B description This device is designed to multiplex signals from 4-bit data sources to four 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. The 74AC11257 is characterized for operation from –40°C to 85°C. FUNCTION TABLE INPUTS OUTPUT Y DATA OE SELECT A/B A B H X X X L L L X L L L H X H L H X L L L H X H H Z 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. EPIC is a trademark of Texas Instruments Incorporated. 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 74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049B – MARCH 1989 – REVISED JUNE 1996 logic symbol† OE A/B 1A 1B 2A 2B 3A 3B 4A 4B 10 1 20 19 18 EN G1 1 MUX 2 1Y 1 17 14 13 12 11 3 8 9 2Y 3Y 4Y † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) OE A/B 1A 1B 2A 2B 3A 3B 4A 4B 2 10 1 20 2 1Y 19 18 3 2Y 17 14 8 3Y 13 12 9 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 4Y 74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049B – MARCH 1989 – REVISED JUNE 1996 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 VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DW package . . . . . . . . . . . . . . . . . . 1.6 W N package . . . . . . . . . . . . . . . . . . . . 1.3 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 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 VCC VIH Supply voltage VCC = 3 V VCC = 4.5 V High-level input voltage VCC = 5.5 V VCC = 3 V VIL VI VO IOH IOL Low-level input voltage MIN NOM MAX 3 5 5.5 3.85 0.9 1.35 0 0 Input transition rise or fall rate TA Operating free-air temperature VCC = 3 V VCC = 4.5 V POST OFFICE BOX 655303 VCC VCC V V –4 –24 VCC = 5.5 V VCC = 3 V –24 VCC = 4.5 V VCC = 5.5 V 24 • DALLAS, TEXAS 75265 V 1.65 Output voltage Dt/Dv V 3.15 Input voltage Low-level output current V 2.1 VCC = 4.5 V VCC = 5.5 V High-level output current UNIT mA 12 mA 24 0 10 ns/V –40 85 °C 3 74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049B – MARCH 1989 – REVISED JUNE 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC IOH = –50 mA VOH IOH = –4 mA IOH = –24 24 mA IOH = –75 mA† IOL = 12 mA IOL = 24 mA IOZ II ICC Ci Co TA = 25°C TYP MAX MIN 3V 2.9 2.9 4.5 V 4.4 4.4 5.5 V 5.4 5.4 3V 2.58 2.48 4.5 V 3.94 3.8 5.5 V 4.94 4.8 5.5 V IOL = 50 mA VOL MIN MAX UNIT V 3.85 3V 0.1 0.1 4.5 V 0.1 0.1 5.5 V 0.1 0.1 3V 0.36 0.44 4.5 V 0.36 0.44 5.5 V 0.36 0.44 V IOL = 75 mA† VO = VCC or GND 5.5 V 5.5 V ±0.5 ±5 mA VI = VCC or GND VI = VCC or GND, 5.5 V ±0.1 ±1 mA 5.5 V 8 80 mA IO = 0 VI = VCC or GND VO = VCC or GND 1.65 5V 3.5 pF 5.5 V 8 pF † Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms. switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1) 4 PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B Y tPLH tPHL A/B Any Y tPZH tPZL OE Any Y tPHZ tPLZ OE Any Y POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN TA = 25°C TYP MAX MIN MAX 1.5 5.6 8.1 1.5 8.9 1.5 6.2 9 1.5 10.1 1.5 6.1 9.2 1.5 10.2 1.5 6.6 10 1.5 11.2 1.5 5.6 8.2 1.5 9.1 1.5 7.5 10.4 1.5 11.8 1.5 5.6 7.6 1.5 8.3 1.5 6.2 8.8 1.5 9.6 UNIT ns ns ns ns 74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049B – MARCH 1989 – REVISED JUNE 1996 switching characteristics, over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B Y tPLH tPHL A/B Any Y tPZH tPZL OE Any Y tPHZ tPLZ OE Any Y MIN TA = 25°C TYP MAX MIN MAX 1.5 3.6 5.8 1.5 6.4 1.5 4.1 6.5 1.5 7.2 1.5 4 6.5 1.5 7.2 1.5 4.4 7.1 1.5 7.9 1.5 3.8 5.9 1.5 6.5 1.5 5 7.6 1.5 8.6 1.5 4.5 6.4 1.5 7.6 1.5 4.8 6.9 1.5 7.6 UNIT ns ns ns ns operating characteristics, VCC = 5 V, TA = 25°C PARAMETER Cpd d TEST CONDITIONS Outputs enabled Power dissipation capacitance Outputs disabled POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 CL = 50 pF, pF f = 1 MHz TYP 37 11 UNIT pF 5 74AC11257 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS SCAS049B – MARCH 1989 – REVISED JUNE 1996 PARAMETER MEASUREMENT INFORMATION 2 × VCC S1 500 Ω From Output Under Test Open GND TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND 500 Ω CL = 50 pF (see Note A) LOAD CIRCUIT VCC 50% 50% 0V Input tPHL tPLH In-Phase Output 50% VCC VOH 50% VCC VOL 50% VCC VOH 50% VCC VOL VCC Output Waveform 2 S1 at GND (see Note B) 50% 50% 0V tPZL [ VCC tPLZ Output Waveform 1 S1 at 2 × VCC (see Note B) tPLH tPHL Out-of-Phase Output Output Control (low-level enabling) 50% VCC VOL tPHZ tPZH VOLTAGE WAVEFORMS 20% VCC 50% VCC 80% VCC VOH [0V VOLTAGE WAVEFORMS 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 are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns. D. The outputs are measured one at a time with one input transition per measurement. Figure 1. Load Circuit 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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