SN54BCT760, SN74BCT760 OCTAL BUFFERS/DRIVERS WITH OPEN-COLLECTOR OUTPUTS SCBS034B – JULY 1989 – REVISED NOVEMBER 1993 • • Open-Collector Version of ′BCT244 Open-Collector Outputs Drive Bus Lines or Buffer Memory Address Registers ESD Protection Exceeds 2000 V Per MIL-STD-883C Method 3015 Packages Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic and Ceramic 300-mil DIPs (J, N) SN54BCT760 . . . J OR W PACKAGE SN74BCT760 . . . DW OR N PACKAGE (TOP VIEW) 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND description These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. 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 2Y4 1A1 1OE VCC SN54BCT760 . . . FK PACKAGE (TOP VIEW) The ′BCT760 is organized as two 4-bit buffers/line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. 1A2 2Y3 1A3 2Y2 1A4 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 1Y1 2A4 1Y2 2A3 1Y3 2Y1 GND 2A1 1Y4 2A2 The SN54BCT760 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74BCT760 is characterized for operation from 0°C to 70°C. 2OE • • FUNCTION TABLE (each buffer) INPUTS OE A OUTPUT Y L H H L L L H X 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 SN54BCT760, SN74BCT760 OCTAL BUFFERS/DRIVERS WITH OPEN-COLLECTOR OUTPUTS SCBS034B – JULY 1989 – REVISED NOVEMBER 1993 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1OE 2 18 4 16 6 14 8 12 1Y1 1A1 2OE 1Y3 1A2 2A2 2A3 2A4 18 4 16 6 14 8 12 1Y1 1Y2 1Y4 1Y3 EN 1A4 2A1 2 1Y2 1A3 19 1 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 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 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: SN54BCT760 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA SN74BCT760 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range: SN54BCT760 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74BCT760 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 negative input voltage rating may be exceeded if the input clamp current rating is observed. 2–2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54BCT760, SN74BCT760 OCTAL BUFFERS/DRIVERS WITH OPEN-COLLECTOR OUTPUTS SCBS034B – JULY 1989 – REVISED NOVEMBER 1993 recommended operating conditions SN54BCT760 SN74BCT760 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL VOH Low-level input voltage 0.8 0.8 High-level output voltage 5.5 5.5 V IIK IOL Input clamp current –18 –18 mA 64 mA TA Operating free-air temperature 70 °C High-level input voltage 2 2 Low-level output current V 48 – 55 125 V 0 V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VOL VCC = 4 4.5 5V II IIH VCC = 5.5 V, VCC = 5.5 V, IIL IOH VCC = 5.5 V, VCC = 4.5 V, ICC Ci SN54BCT760 TYP† MAX TEST CONDITIONS VCC = 5.5 V, VCC = 5 V, VCC = 5 V, MIN II = –18 mA IOL = 48 mA –1.2 0.38 IOL = 64 mA VI = 7 V VI = 2.7 V VI = 0.5 V VOH = 5.5 V SN74BCT760 TYP† MAX MIN –1.2 0.55 0.42 Outputs open 0.55 V 0.1 mA 20 20 µA –1 –1 mA 0.1 0.1 mA 21 33 21 33 Outputs low 48 76 48 76 OE disabled 6 10 6 10 Co † All typical values are at VCC = 5 V, TA = 25°C. V 0.1 Outputs high VI = 2.5 V or 0.5 V VI = 2.5 V or 0.5 V UNIT mA 6 6 pF 10 10 pF switching characteristics (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) 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‡ ′BCT760 MIN tPLH tPHL Any A Y tPLH tPHL OE Y SN54BCT760 UNIT SN74BCT760 TYP MAX MIN MAX MIN MAX 6.3 8 9.5 6.3 11.1 6.3 10 2.1 4.3 6.5 2.1 7.7 2.1 7.2 8.6 13 15.2 8.6 18.7 8.6 17.5 3.2 6.2 8.9 3.2 10.4 3.2 9.9 ns ns ‡ For conditions shown as MIN or MAX, use the appropriate values specified under recommended operating conditions. NOTE 2: Load circuits and voltage waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–3 SN54BCT760, SN74BCT760 OCTAL BUFFERS/DRIVERS WITH OPEN-COLLECTOR OUTPUTS SCBS034B – JULY 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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