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| TC74VHCT245AF/AFT/AFK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHCT245AF,TC74VHCT245AFT,TC74VHCT245AFK Octal Bus Transceiver The TC74VHCT245A is an advanced high speed CMOS OCTAL BUS TRANSCEIVER fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. It is intended for two-way asynchronous communication between data busses. The direction of data transmission is determined by the level of the DIR input. The enable input ( G ) can be used to disable the device so that the busses are effectively isolated. The input voltage are compatible with TTL output voltage. This device may be used as a level converter for interfacing 3.3 V to 5 V system. Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (Note) pins without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and input/output voltages such as battery back up, hot board insertion, etc. Note: Output in off-state TC74VHCT245AFK TC74VHCT245AF TC74VHCT245AFT Features (Note) * * * * * * * High speed: tpd = 4.9 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 A (max) at Ta = 25C Compatible with TTL outputs: VIL = 0.8 V (max) VIH = 2.0 V (min) Power down protection is provided on all inputs and outputs Balanced propagation delays: tpLH - tpHL Low noise: VOLP = 1.6 V (max) Pin and function compatible with the 74 series (74AC/HC/F/ALS/LS etc.) 245 type. Note: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result. All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull down resistors. Weight SOP20-P-300-1.27A : 0.22 g (typ.) TSSOP20-P-0044-0.65A : 0.08 g (typ.) VSSOP20-P-0030-0.50 : 0.03 g (typ.) 1 2007-10-01 TC74VHCT245AF/AFT/AFK Pin Assignment IEC Logic Symbol (19) (1) G3 3 EN 1 [BA] 3 EN 2 [AB] 1 2 A2 A3 A4 A5 (3) (4) (5) (6) (7) (8) (9) (17) (16) (15) (14) (13) (12) (11) B2 B3 B4 B5 B6 B7 B8 (18) B1 DIR A1 A2 A3 A4 A5 A6 A7 A8 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 11 (top view) VCC G B1 B2 B3 B4 B5 B6 B7 B8 G DIR A1 (2) GND 10 A6 A7 A8 Truth Table Inputs Function A Bus Output Input Z B Bus Input Output G L L H DIR L H X Output A=B B=A Z X: Don't care Z: High impedance 2 2007-10-01 TC74VHCT245AF/AFT/AFK Absolute Maximum Ratings (Note 1) Characteristics Supply voltage range DC input voltage (DIR, G ) DC bus I/O voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VI/O IIK IOK IOUT ICC PD Tstg Rating -0.5 to 7.0 -0.5 to 7.0 -0.5 to 7.0 -0.5 to VCC + 0.5 -20 20 25 75 Unit V V (Note 2) (Note 3) V mA (Note 4) mA mA mA mW C 180 -65 to 150 Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook ("Handling Precautions"/"Derating Concept and Methods") and individual reliability data (i.e. reliability test report and estimated failure rate, etc). Note 2: Output in off-state Note 3: High or low state. IOUT absolute maximum rating must be observed. Note 4: VOUT < GND, VOUT > VCC Operating Ranges (Note 1) Characteristics Supply voltage Input voltage (DIR, G ) Bus I/O voltage Operating temperature Input rise and fall time Symbol VCC VIN VI/O Topr dt/dV Rating 4.5 to 5.5 0 to 5.5 0 to 5.5 0 to VCC -40 to 85 Unit V V (Note 2) (Note 3) V C ns/V 0 to 20 Note 1: The operating ranges are required to ensure the normal operation of the device. Unused inputs and bus inputs must be tied to either VCC or GND. Please connect both bus inputs and the bus outputs with VCC or GND when the I/O of the bus terminal changes by the function. In this case, please note that the output is not short-circuited. Note 2: Output in off-state Note 3: High or low state 3 2007-10-01 TC74VHCT245AF/AFT/AFK Electrical Characteristics DC Characteristics Characteristics High-level input voltage Low-level input voltage High-level output voltage Low-level output voltage 3-state output off-state current Input leakage current Quiescent supply current Output leakage current Symbol Test Condition VCC (V) VIH VIL VOH Ta = 25C Min 2.0 Ta = -40 to 85C Max Unit Typ. Min 2.0 Max 4.5 to 5.5 4.5 to 5.5 4.5 4.5 4.5 4.5 5.5 V V V 0.8 0.8 VIN IOH = -50 A = VIH or IOH = -8 mA VIL VIN IOL = 50 A = VIH or IOL = 8 mA VIL VIN = VIH or VIL VOUT = VCC or GND VIN = 5.5 V or GND VIN = VCC or GND Per input: VIN = 3.4 V Other input: VCC or GND VOUT = 5.5 V 4.4 3.94 4.5 4.4 3.80 VOL 0.0 0.1 0.36 0.25 0.1 0.44 2.50 V IOZ IIN ICC ICCT IOPD A 0 to 5.5 5.5 5.5 0 0.1 1.0 A A 4.0 1.35 0.5 40.0 1.50 5.0 mA A AC Characteristics (input: tr = tf = 3 ns) Characteristics Symbol tpLH tpHL tpZL tpZH tpLZ tpHZ tosLH tosHL CIN CI/O CPD DIR, G An, Bn (Note 2) Test Condition VCC (V) Propagation delay time 3-state output enable time 3-state output disable time Output to output skew Input capacitance Bus input capacitance Power dissipation capacitance Ta = 25C CL (pF) 15 50 15 50 50 Min Ta = -40 to 85C Max 7.7 8.7 13.8 14.8 15.4 Min 1.0 1.0 1.0 1.0 1.0 Max 8.5 9.5 15.0 16.0 16.5 Unit Typ. 4.9 5.4 9.4 9.9 10.1 5.0 0.5 ns RL = 1 k 5.0 0.5 ns RL = 1 k 5.0 0.5 ns (Note 1) 5.0 0.5 50 1.0 10 1.0 10 ns pF pF pF 4 13 16 Note 1: Parameter guaranteed by design. tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn| Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (opr) = CPD*VCC*fIN + ICC/8 (per bit) 4 2007-10-01 TC74VHCT245AF/AFT/AFK Noise Characteristics (input: tr = tf = 3 ns) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Minimum high level dynamic input voltage Maximum low level dynamic input voltage Symbol VOLP VOLV VIHD VILD CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF Test Condition VCC (V) 5.0 5.0 5.0 5.0 Ta = 25C Typ. 1.1 -1.1 Limit 1.5 -1.5 Unit V V V V 2.0 0.8 5 2007-10-01 TC74VHCT245AF/AFT/AFK Package Dimensions Weight: 0.22 g (typ.) 6 2007-10-01 TC74VHCT245AF/AFT/AFK Package Dimensions Weight: 0.08 g (typ.) 7 2007-10-01 TC74VHCT245AF/AFT/AFK Package Dimensions Weight: 0.03 g (typ.) 8 2007-10-01 TC74VHCT245AF/AFT/AFK RESTRICTIONS ON PRODUCT USE * The information contained herein is subject to change without notice. 20070701-EN * TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.).These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in his document shall be made at the customer's own risk. * The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. * Please contact your sales representative for product-by-product details in this document regarding RoHS compatibility. Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations. 9 2007-10-01 |
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