SN74F126 QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SDFS017A – D3212, JANUARY 1989 – REVISED OCTOBER 1993 • • D OR N PACKAGE (TOP VIEW) 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs 1OE 1A 1Y 2OE 2A 2Y GND description The SN74F126 bus buffer features independent line drivers with 3-state outputs. Each output is disabled when the associated output enable (OE) input is low. 1 14 2 13 3 12 4 11 5 10 6 9 7 8 VCC 4OE 4A 4Y 3OE 3A 3Y The SN74F126 is characterized for operation from 0°C to 70°C. FUNCTION TABLE (each buffer) INPUTS OE A OUTPUT Y H H H H L L L X Z logic symbol† 1OE 1A 2OE 2A 3OE 3A 4OE 4A 1 2 logic diagram (positive logic) EN 1 4 5 3 6 1Y 1A 13 12 8 11 1 2 3 1Y 2Y 10 9 1OE 2OE 4 3Y 2A 5 6 2Y 4Y 3OE † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 3A 4OE 4A 10 9 8 3Y 13 12 11 4Y Copyright 1993, 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 2–1 SN74F126 QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SDFS017A – D3212, JANUARY 1989 – REVISED OCTOBER 1993 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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed. recommended operating conditions MIN NOM MAX 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IIK Low-level input voltage 0.8 V Input clamp current – 18 mA IOH IOL High-level output current – 15 mA Low-level output current 64 mA TA Operating free-air temperature 70 °C High-level input voltage 2 V V 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL II TEST CONDITIONS VCC = 4.5 V, VCC = 4 4.5 5V VCC = 4.75 V, VCC = 4.5 V, VCC = 0, VCC = 5.5 V, II = – 18 mA IOH = – 3 mA IOH = – 15 mA IOH = – 3 mA MIN TYP‡ 2.4 3.3 2 3.1 MAX UNIT – 1.2 V V 2.7 IOL = 64 mA VI = 7 V 0.4 0.55 V 0.1 mA VI = 2.7 V VI = 0.5 V 20 µA – 20 µA VO = 2.7 V VO = 0.5 V 50 µA – 50 µA – 225 mA 20 30 mA 32 48 mA ICCZ VCC = 5.5 V, Outputs open 26 ‡ All typical values are at VCC = 5 V, TA = 25°C. § Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. 39 mA IIH IIL IOZH IOZL IOS§ ICCH ICCL 2–2 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, POST OFFICE BOX 655303 VO = 0 Outputs open Outputs open • DALLAS, TEXAS 75265 – 100 SN74F126 QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SDFS017A – D3212, JANUARY 1989 – REVISED OCTOBER 1993 switching characteristics (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A Y tPZH tPZL OE Y tPHZ tPLZ OE Y VCC = 5 V, CL = 50 pF, RL = 500 Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† MIN TYP MAX MIN MAX 2 4 6.5 2 7 3 5.5 8 2.8 8.5 3.8 6 7.5 3.3 8.5 3.8 6 8 3.5 8.5 2 4.5 6.5 2 7.5 3 5.5 7.5 3 8 UNIT ns ns ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 2: Load circuits and waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–3 SN74F126 QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SDFS017A – D3212, JANUARY 1989 – REVISED OCTOBER 1993 2–4 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. 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