SN64BCT245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS040A – JANUARY 1990 – REVISED JANUARY 1994 • • • • • DW OR N PACKAGE (TOP VIEW) BiCMOS Design Significantly Reduces ICCZ 3-State True Outputs Drive Bus Lines Directly High-Impedance State During Power Up and Power Down ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015 Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (N) DIR A1 A2 A3 A4 A5 A6 A7 A8 GND description 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC OE B1 B2 B3 B4 B5 B6 B7 B8 This octal bus transceiver is designed for asynchronous communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated. The outputs are in a high-impedance state during power up and power down while the supply voltage is less than approximately 3 V. The SN64BCT245 is characterized for operation from – 40°C to 85°C and 0°C to 70°C. FUNCTION TABLE INPUTS DIR L L B data to A bus L H A data to B bus H X Isolation logic symbol† OE DIR A1 19 1 2 OPERATION OE logic diagram (positive logic) DIR G3 1 3EN1[BA] 3EN2[AB] 19 18 1 B1 A1 OE 2 2 A2 A3 A4 A5 A6 A7 A8 3 17 4 16 5 15 6 14 7 13 8 12 9 11 B2 18 B3 B1 B4 B5 B6 B7 To Seven Other Channels B8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 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 3–1 SN64BCT245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS040A – JANUARY 1990 – REVISED JANUARY 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 High level output current High-level IOL Low level output current Low-level TA Operating free-air temperature 3–2 High-level input voltage 2 POST OFFICE BOX 655303 V A1 – A8 –3 B1 – B8 –15 A1 – A8 24 B1 – B8 64 – 40 • DALLAS, TEXAS 75265 V 85 mA mA °C SN64BCT245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS040A – JANUARY 1990 – REVISED JANUARY 1994 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK TEST CONDITIONS VCC = 4.5 V, II = –18 mA IOH = –1 mA VCC = 4.5 V IOH = – 3 mA IOH = –15 mA Any A VOH Any A or B Any B Any A VOL Any B Power up VCC = 4 4.5 5V IOL = 24 mA IOL = 64 mA VCC = 0 to 2.3 23V VO = 2.7 V VO = 0.5 V 1 8 V to 0 VCC = 1.8 VO = 2.7 V VO = 0.5 V VCC = 5 5.5 5V V, VI = 5 5.5 5V VCC = 5 5.5 5V V, VI = 2 2.7 7V VCC = 5 5.5 5V V, VI = 0 0.5 5V VCC = 5 5.5 5V V, VO = 0 IOZ Power down A and B II‡ DIR and OE A and B IIH‡ DIR and OE A and B IIL DIR and OE Any A IOS§ Any B ICCH ICCL ICCZ Ci Cio i A-to-B MIN TYP† 2.5 3.4 2.4 3.3 2 3.1 MAX UNIT –1.2 V V 0.35 0.5 0.42 0.55 OE at 0.8 08V 08V OE at 0.8 70 µA – 0.65 mA 70 µA – 0.65 mA 1 0.1 70 20 – 0.65 –1.2 – 60 –150 –100 – 225 VCC = 5.5 V VCC = 5.5 V 36 57 A-to-B 57 90 10 15 OE and DIR VCC = 5.5 V VCC = 5 V, A to B B to A VI = 2.5 V or 0.5 V VCC = 5 V V, 7 mA µA mA mA mA pF 9 VI = 2 2.5 5 V or 0.5 05V V pF 12 † All typical values are at VCC = 5 V, TA = 25°C. ‡ For I/O ports, the parameters IIH and IIL include the off-state output current. § Not more than one output should be tested at a time, and the duration of the test should not exceed one second. switching characteristics (see Note 2) PARAMETER FROM ((INPUT)) TO (OUTPUT)) (O tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B VCC = 5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω TA = – 40°C to 85°C UNIT TA = 0°C to 70°C MIN MAX MIN MAX MIN MAX 1 6 1 7.2 1 7 1.5 6.6 1.5 7.6 1.5 7 1.5 9.4 1.5 11.2 1.5 10.9 1.5 10.2 1.5 11.8 1.5 11.6 1.5 8.3 1.5 9.7 1.5 9.3 1.5 7.8 1.5 9.6 1.5 9.1 ns ns ns NOTE 2: Load circuits and voltage waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3–3 SN64BCT245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCBS040A – JANUARY 1990 – REVISED JANUARY 1994 3–4 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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