SN64BCT125A QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SCBS052B – JULY 1990 – REVISED MAY 1994 • • • • • D OR N PACKAGE (TOP VIEW) State-of-the-Art BiCMOS Design Significantly Reduces ICCZ High-Impedance State During Power-Up and Power-Down 3-State Outputs Drive Bus Lines or Buffer-Memory Address Registers ESD Protection Exceeds 2000 V Per MIL-STD-883C Method 3015 Package Options Include Plastic Small-Outline (D) Packages and Standard Plastic 300-mil DIPs (N) 1OE 1A 1Y 2OE 2A 2Y GND 1 14 2 13 3 12 4 11 5 10 6 9 7 8 VCC 4OE 4A 4Y 3OE 3A 3Y description The SN64BCT125A bus buffer features independent line drivers with 3-state outputs. Each output is disabled when the associated output-enable (OE) input is high. The SN64BCT125A is characterized for operation from – 40°C to 85°C and 0°C to 70°C. FUNCTION TABLE (each buffer) INPUTS OE A OUTPUT Y L H H L L L H 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 9 13 12 11 1 2 3 1Y 2Y 10 8 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 1994, 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 3–3 SN64BCT125A QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SCBS052B – JULY 1990 – REVISED MAY 1994 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 7 V Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . – 0.5 V to 5.5 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°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 and output voltage ratings may be exceeded if the input and output 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 85 °C High-level input voltage 2 V V – 40 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4 4.5 5V VOL IOZH VCC = 4.5 V, VCC = 5.5 V, IOZL VCC = 5.5 V, VCC = 0 to 1.3 V (power up) II IIH IIL IOS§ ICCL ICCH ICCZ Ci MIN TYP‡ II = –18 mA IOH = – 3 mA 2.4 3.3 2 3.1 VCC = 4.5 V, VOH IOZ TEST CONDITIONS IOH = – 15 mA IOH = 64 mA VCC = 1.3 V to 0 (power down) VCC = 0, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V 0.42 VO = 2.7 V VO = 0.5 V VO = 2 2.7 7 V or 0 0.5 5 V, V OE at 0.8 08V –1.2 V V 0.55 V 50 µA – 50 µA µA VI = 7 V VI = 2.7 V 0.1 mA 25 µA VI = 0.5 V VO = 0 – 20 µA – 100 VI = 2.5 V or 0.5 V VO = 2.5 V or 0.5 V Co ‡ All typical values are at VCC = 5 V, TA = 25°C. § Not more than one output should be tested at a time, and the duration of the test should not exceed one second. 3–4 UNIT " 50 " 50 VCC = 5.5 V VCC = 5.5 V VCC = 5 V, VCC = 5 V, MAX POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 – 225 mA 46 49 mA 19 31 mA 6 14 mA 4 pF 9 pF SN64BCT125A QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SCBS052B – JULY 1990 – REVISED MAY 1994 switching characteristics (see Note 2) 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 VCC = 5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω Ω, TA = 25°C TA = – 40°C to 85°C UNIT TA = 0°C to 70°C MIN TYP MAX MIN MAX MIN MAX 1.6 3.5 5.2 1.6 6 1.6 5.7 2.7 5 6.9 2.7 8 2.7 7.7 3.4 6.7 9 3.4 11.1 3.4 10.3 5 8.2 10.4 5 12.8 5 11.7 3 5.8 7.4 3 9.4 3 8.9 2.8 5.5 7.3 2.8 9.9 2.8 8.6 ns ns ns NOTE 2: Load circuits and voltage waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3–5 SN64BCT125A QUADRUPLE BUS BUFFER GATE WITH 3-STATE OUTPUTS SCBS052B – JULY 1990 – REVISED MAY 1994 3–6 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. 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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