SN74CBT3384 10-BIT CROSSBAR SWITCH SCDS004B – NOVEMBER 1992 – REVISED JUNE 1994 • • • • DB, DW, OR PW PACKAGE (TOP VIEW) Functionally Equivalent to QS3384 and QS3L384 5-Ω Switch Connection Between Two Ports TTL-Compatible Input and Output Levels Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages OE1 B1 A1 A2 B2 B3 A3 A4 B4 B5 A5 GND description The SN74CBT3384 provides ten bits of high-speed TTL-compatible bus switching. The low on resistance of the switch allows connections to be made without adding propagation delay. 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC B10 A10 A9 B9 B8 A8 A7 B7 B6 A6 OE2 The device is organized as two 5-bit switches with separate output-enable (OE) inputs. When OE is low, the switch is on and port A is connected to port B. When OE is high, the switch is open and a high-impedance state exists between the two ports. The SN74CBT3384 is characterized for operation from 0°C to 70°C. FUNCTION TABLE OE1 OE2 B1 – B5 B6 – B10 L L A1 – A5 A6 – A10 L H A1 – A5 Z H L Z A 6 – A10 H H Z 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 11–1 SN74CBT3384 10-BIT CROSSBAR SWITCH SCDS004B – NOVEMBER 1992 – REVISED JUNE 1994 logic diagram A1 B1 A5 B5 OE1 A6 B6 A10 B10 OE2 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 6 V Continuous channel current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Input clamp current, IIK (VI/O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 50 mA Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DB package . . . . . . . . . . . . . . . . . . 0.6 W DW package . . . . . . . . . . . . . . . . . 1.6 W PW package . . . . . . . . . . . . . . . . . . 0.7 W 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. NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils. For more information, refer to the Package Thermal Considerations application note. recommended operating conditions VCC VIH Supply voltage VIL TA Low-level control input voltage 11–2 High-level control input voltage MIN MAX UNIT 4.75 5.25 V 2 Operating free-air temperature 0 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 V 0.8 V 70 °C SN74CBT3384 10-BIT CROSSBAR SWITCH SCDS004B – NOVEMBER 1992 – REVISED JUNE 1994 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN VIK II VCC = 4.5 V, VCC = 5.25 V, II = – 18 mA VI = 5.25 V or GND IOS ICC VCC = 4.75 V, VCC = 5.5 V, VI(A) = 0, IO = 0, VI(B) = 4.75 V VI = VCC or GND VCC = 5.25 V, VI = 3 V or 0 One input at 3.4 V, Other inputs at VCC or GND VO = 3 V or 0, OE = VCC VCC = 4.75 V VI = 0, VI = 0, ∆ICC‡ Control pins Ci Control pins Cio(OFF) ron§ TYP† MAX UNIT –1.2 V ±5 250 50 µA 2.5 mA 3 pF 6 II = 64 mA II = 30 mA µA mA pF 5 7 5 7 Ω VI = 2.4 V, II = 15 mA 10 15 † All typical values are at VCC = 5 V, TA = 25°C. ‡ This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. § Measured by the voltage drop between the A and B pin at the indicated current through the switch. On resistance is determined by the lower of the voltages of the two (A or B) pins. switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Note 3) PARAMETER FROM (INPUT) TO (OUTPUT) tpd¶ A or B B or A ten OE A or B MIN 1 MAX UNIT 0.25 ns 8.5 ns tdis A or B 1 8.5 ns OE ¶ This parameter is characterized but not tested. This propagation delay is based on the RC time constant of the typical on resistance of the switch and a load capacitance of 50 pF. NOTE 3: Load circuit and voltage waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11–3 SN74CBT3384 10-BIT CROSSBAR SWITCH SCDS004B – NOVEMBER 1992 – REVISED JUNE 1994 11–4 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. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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