SN74BCT757 OCTAL BUFFER/DRIVER WITH OPEN-COLLECTOR OUTPUTS SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 1993 • • • • DW OR N PACKAGE (TOP VIEW) BiCMOS Design Significantly Reduces ICCZ ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Open-Collector Outputs Drive Bus Lines or Buffer Memory Address Registers Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (N) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND description 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 This octal buffer and line driver is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. This device provides complementary output-enable (OE and OE) inputs and noninverting outputs. The SN74BCT757 is characterized for operation from 0°C to 70°C. FUNCTION TABLES INPUTS 1OE 1A OUTPUT 1Y H X H L L L L H H INPUTS 2OE 2A OUTPUT 2Y L X H H L L H H H 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 SN74BCT757 OCTAL BUFFER/DRIVER WITH OPEN-COLLECTOR OUTPUTS SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 1993 logic symbol† 1OE 1A1 1A2 1A3 1A4 2OE 2A1 2A2 2A3 2A4 1 logic diagram (positive logic) 1OE EN 2 18 4 16 6 14 8 12 19 1Y1 1 2 18 4 16 1A3 6 14 1A4 8 12 1A1 1Y1 1Y2 1Y3 1A2 1Y2 1Y4 1Y3 EN 11 9 13 7 15 5 17 3 1Y4 2Y1 2Y2 2Y3 2OE 19 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 range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Input voltage range, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Input current range, II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA 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, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. 2–2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN74BCT757 OCTAL BUFFER/DRIVER WITH OPEN-COLLECTOR OUTPUTS SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 1993 recommended operating conditions (see Note 1) MIN NOM MAX 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL VOH Low-level input voltage High-level output voltage 5.5 V IIK IOL Input clamp current –18 mA 64 mA 70 °C High-level input voltage 2 V 0.8 Low-level output current TA Operating free-air temperature NOTE 1: Unused or floating inputs must be held high or low. V 0 V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK VOL VCC = 4.5 V, VCC = 4.5 V, II = –18 mA IOL = 64 mA II IIH VCC = 5.5 V, VCC = 5.5 V, IIL IOH MIN TYP† 0.42 MAX UNIT –1.2 V 0.55 V VI = 7 V VI = 2.7 V 0.1 mA 20 µA VCC = 5.5 V, VCC = 4.5 V, VI = 0.5 V VOH = 5.5 V –1 mA 0.1 mA ICC VCC = 5.5 V, Outputs open Ci VCC = 5 V, VCC = 5 V, VI = 2.5 V or 0.5 V VO = 2.5 V or 0.5 V Outputs high 34 Outputs low 77 OE and OE inactive Co mA 10 6 pF 4 pF † All typical values are at VCC = 5 V, TA = 25°C. switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Note 2) FROM (INPUT) TO (OUTPUT) tPLH tPHL A Y tPLH tPHL 2OE Y tPLH tPHL 1OE Y PARAMETER VCC = 5 V, TA = 25°C MIN MAX 9.6 6.6 10.1 6 2 6.6 MIN TYP MAX 6.9 8.3 2.4 4.2 11 14.8 17.9 10.8 19.7 2.9 4.6 6.2 2.6 6.9 11.4 13.9 16.1 10 18 4.4 6.1 7.8 4 8.5 UNIT ns ns ns NOTE 2: Load circuits and voltage waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–3 SN74BCT757 OCTAL BUFFER/DRIVER WITH OPEN-COLLECTOR OUTPUTS SCBS041D – NOVEMBER 1989 – REVISED NOVEMBER 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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