SN54BCT2240, SN74BCT2240 OCTAL BUFFERS AND LINE/MOS DRIVERS WITH 3-STATE OUTPUTS SCBS030D – SEPTEMBER 1988 – REVISED APRIL 1994 • • • SN54BCT2240 . . . J OR W PACKAGE SN74BCT2240 . . . DB, DW, OR N PACKAGE (TOP VIEW) State-of-the-Art BiCMOS Design Significantly Reduces ICCZ Output Ports Have Equivalent 33-Ω Series Resistors, So No External Resistors Are Required 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Package Options Include Plastic Small-Outline (DW) and Shrink Small-Outline (DB) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic and Ceramic 300-mil DIPs (J, 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 SN54BCT2240 . . . FK PACKAGE (TOP VIEW) 2Y4 1A1 1OE VCC 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. Taken together with the SN74BCT2241 and ′BCT2244, these devices provide the choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. These devices feature high fan-out and improved fan-in. 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 1A2 2Y3 1A3 2Y2 1A4 2OE • The ′BCT2240 is organized as two 4-bit 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. The outputs, which are designed to source or sink up to 12 mA, include 33-Ω series resistors to reduce overshoot and undershoot. The SN54BCT2240 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74BCT2240 is characterized for operation from 0°C to 70°C. FUNCTION TABLE (each buffer) INPUTS OE A OUTPUT Y L H L L L H H X Z 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 2–1 SN54BCT2240, SN74BCT2240 OCTAL BUFFERS AND LINE/MOS DRIVERS WITH 3-STATE OUTPUTS SCBS030D – SEPTEMBER 1988 – REVISED APRIL 1994 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1OE EN 2 18 1 4 16 6 14 8 12 1Y1 1A1 2OE 2A1 2A2 2A3 2A4 2 18 4 16 6 14 8 12 1Y3 1A2 1Y2 1Y4 1Y3 EN 11 9 1 13 7 15 5 17 3 1A4 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 schematic of Y outputs VCC Output GND 2–2 1Y1 1Y2 1A3 19 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2Y1 2Y2 2Y3 2Y4 SN54BCT2240, SN74BCT2240 OCTAL BUFFERS AND LINE/MOS DRIVERS WITH 3-STATE OUTPUTS SCBS030D – SEPTEMBER 1988 – REVISED APRIL 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 Input clamp current, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 mA Operating free-air temperature range: SN54BCT2240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74BCT2240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 and output voltage ratings may be exceeded if the input and output current ratings are observed. recommended operating conditions SN54BCT2240 SN74BCT2240 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IIK Low-level input voltage 0.8 0.8 V Input clamp current –18 –18 mA IOH IOL High-level output current –12 –12 mA Low-level output current 12 12 mA TA Operating free-air temperature 70 °C High-level input voltage 2 – 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 125 0 V V 2–3 SN54BCT2240, SN74BCT2240 OCTAL BUFFERS AND LINE/MOS DRIVERS WITH 3-STATE OUTPUTS SCBS030D – SEPTEMBER 1988 – REVISED APRIL 1994 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK SN54BCT2240 TYP† MAX TEST CONDITIONS VCC = 4.5 V, MIN II = –18 mA IOH = –1 mA SN74BCT2240 TYP† MAX MIN –1.2 –1.2 2.4 3.3 2.4 3.3 2 3.2 2 3.2 UNIT V VOH VCC = 4 4.5 5V VOL VCC = 4 4.5 5V II VCC = 5.5 V, IOL = 12 mA VI = 7 V IIH IIL VCC = 5.5 V, VI = 2.7 V 20 20 µA VCC = 5.5 V, VI = 0.5 V –1 –1 mA IOZH VCC = 5.5 V, VO = 2.7 V 50 50 µA IOZL IOS‡ VCC = 5.5 V, VO = 0.5 V VCC = 5.5 V, VO = 0 ICCH ICCL VCC = 5.5 V, VCC = 5.5 V, Outputs open 19 32 Outputs open 46 76 IOH = – 12 mA IOL = 1 mA V 0.15 0.5 0.15 0.5 0.35 0.8 0.35 0.8 0.1 0.1 – 225 – 50 µA mA 19 32 mA 46 76 mA 6 8 mA –100 ICCZ VCC = 5.5 V, Outputs open 6 8 † 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. mA – 225 – 50 –100 V 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 tPZH tPZL OE Y tPHZ tPLZ OE Y PARAMETER VCC = 5 V, TA = 25°C SN54BCT2240 MIN TYP MAX MIN MAX MIN MAX 0.5 3.4 4.8 0.5 6.3 0.5 5.7 0.5 2.8 4 0.5 4.6 0.5 4.4 2.6 6.2 8.2 2.6 10.1 2.6 9.3 4.3 8.8 10.9 4.3 12.9 4.3 12.4 2 5.3 7.1 2 9.2 2 8.7 2.2 6.7 8.5 2.2 12.2 2.2 10.6 NOTE 2: Load circuit and voltage waveforms are shown in Section 1. 2–4 POST OFFICE BOX 655303 SN74BCT2240 • DALLAS, TEXAS 75265 UNIT ns ns ns 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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