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| TC74LCX245F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX245F,TC74LCX245FT,TC74LCX245FK Low-Voltage Octal Bus Transceiver with 5-V Tolerant Inputs and Outputs The TC74LCX245 is a high-performance CMOS octal bus transceiver. Designed for use in 3.3-V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. The device is designed for low-voltage (3.3 V) VCC applications, but it could be used to interface to 5-V supply environment for both inputs and outputs. The direction of data transmission is determined by the level of the DIR input. The enable input ( OE ) can be used to disable the device so that the busses are effectively isolated. All inputs are equipped with protection circuits against static discharge. TC74LCX245F TC74LCX245FT Features (Note) * * * * * * * * Low-voltage operation: VCC = 2.0 to 3.6 V High-speed operation: tpd = 7.0 ns (max) (VCC = 3.0 to 3.6 V) Ouput current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V) Latch-up performance: -500 mA Available in JEITA SOP, TSSOP and VSSOP (US) Bidirectional interface between 5.0 V and 3.3 V signals Power-down protection provided on all inputs and outputs Pin and function compatible with the 74 series (74AC/VHC/HC/F/ALS/LS etc.) 245 type Note: Do not apply a signal to any bus pins when it is in the output mode. Damage may result. All floating (high impedance) bus pins must have their input levels fixed by means of pull-up or pull-down resistors. Weight SOP20-P-300-1.27A TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50 : 0.22g (typ.) : 0.08 g (typ.) : 0.03 g (typ.) TC74LCX245FK 1 2007-10-19 TC74LCX245F/FT/FK Pin Assignment (top view) IEC Logic Symbol OE DIR 19 1 G3 3EN1 (BA) 3EN2 (AB) A1 2 1 2 A2 A3 A4 A5 A8 9 12 11 B7 B8 A6 A7 A8 7 8 9 13 12 11 B6 B7 B8 3 4 5 6 17 16 15 14 B2 B3 B4 B5 18 B1 DIR A1 A2 A3 A4 A5 A6 A7 1 2 3 4 5 6 7 8 20 VCC 19 18 17 16 15 14 13 OE B1 B2 B3 B4 B5 B6 GND 10 Truth Table Inputs OE L L H DIR L H X Outputs A=B B=A Z Function A-Bus Output Input Z B-Bus Input Output X: Don't care Z: High impedance 2 2007-10-19 TC74LCX245F/FT/FK Absolute Maximum Ratings (Note 1) Characteristics Power supply voltage DC input voltage (DIR, OE ) DC bus I/O voltage Input diode current Output diode current DC output current Power dissipation DC VCC/ground current Storage temperature Symbol VCC VIN Rating -0.5 to 7.0 -0.5 to 7.0 -0.5 to 7.0 (Note 2) Unit V V VI/O IIK IOK IOUT PD ICC/IGND Tstg -0.5 to VCC + 0.5 V mA (Note 3) -50 50 50 (Note 4) mA mA mW mA C 180 100 -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 Power supply voltage Input voltage (DIR, OE ) Bus I/O voltage Output current Operating temperature Input rise and fall time Symbol VCC VIN VI/O IOH/IOL Topr dt/dv Rating 2.0 to 3.6 1.5 to 3.6 (Note 2) 0 to 5.5 0 to 5.5 (Note 3) 0 to VCC (Note 4) 24 12 -40 to 85 Unit V V V mA C (Note 7) ns/V (Note 5) (Note 6) 0 to 10 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: Data retention only Note 3: Output in OFF state Note 4: High or low state Note 5: VCC = 3.0 to 3.6 V Note 6: VCC = 2.7 to 3.0 V Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V 3 2007-10-19 TC74LCX245F/FT/FK Electrical Characteristics DC Characteristics (Ta = -40 to 85C) Characteristics H-level L-level Symbol VIH VIL Test Condition VCC (V) 2.7 to 3.6 2.7 to 3.6 Min 2.0 Max Unit Input voltage V 0.8 IOH = -100 A H-level VOH VIN = VIH or VIL IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 A L-level VOL VIN = VIH or VIL IOL = 12 mA IOL = 16 mA IOL = 24 mA Input leakage current 3-state output OFF state current Power-off leakage current Quiescent supply current Increase in ICC per input IIN IOZ IOFF ICC ICC 2.7 to 3.6 2.7 3.0 3.0 2.7 to 3.6 2.7 3.0 3.0 2.7 to 3.6 2.7 to 3.6 0 2.7 to 3.6 2.7 to 3.6 2.7 to 3.6 VCC - 0.2 2.2 2.4 2.2 V 0.2 0.4 0.4 0.55 5.0 5.0 A A A VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V VIN/VOUT = 5.5 V VIN = VCC or GND VIN/VOUT = 3.6 to 5.5 V VIH = VCC - 0.6 V 10.0 10.0 10.0 A 500 AC Characteristics (Ta = -40 to 85C) Characteristics Symbol tpLH tpHL tpZL tpZH tpLZ tpHZ tosLH tosHL Test Condition VCC (V) 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 (Note) 2.7 3.3 0.3 Min Max 8.0 7.0 9.5 8.5 8.5 7.5 Unit Propagation delay time Figure 1, Figure 2 1.5 ns Output enable time Figure 1, Figure 3 1.5 ns Output disable time Figure 1, Figure 3 1.5 ns Output to output skew 1.0 ns Note: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|) 4 2007-10-19 TC74LCX245F/FT/FK Dynamic Switching Characteristics (Ta = 25C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 ) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Symbol VOLP |VOLV| Test Condition VIH = 3.3 V, VIL = 0 V VIH = 3.3 V, VIL = 0 V VCC (V) 3.3 3.3 Typ. 0.8 0.8 Unit V V Capacitive Characteristics (Ta = 25C) Characteristics Input capacitance Bus input capacitance Power dissipation capacitance Symbol CIN CI/O CPD DIR, OE An, Bn fIN = 10 MHz (Note) Test Condition VCC (V) 3.3 3.3 3.3 Typ. 7 8 25 Unit pF pF pF Note: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption. Average operating current can be obtained by the equation: ICC (opr) = CPDVCCfIN + ICC/8 (per bit) AC Test Circuit Open 6.0 V GND Measure CL RL Switch RL Parameter tpLH, tpHL tpLZ, tpZL tpHZ, tpZH Switch Open 6.0 V GND Output CL = 50 pF RL = 500 Figure 1 AC Waveform tr 2.5 ns Input (An, Bn) tf 2.5 ns 90% 1.5 V 10% 2.7 V GND VOH 1.5 V tpLH tpHL VOL Output (Bn, An) Figure 2 tpLH, tpHL 5 2007-10-19 TC74LCX245F/FT/FK tr 2.5 ns Output Enable ( OE ) tpLZ Output (An, Bn) Low to Off to Low tpHZ Output (An, Bn) High to Off to High Outputs enabled tf 2.5 ns 90% 1.5 V 10% tpZL 3.0 V 1.5 V VOL + 0.3 V VOH - 0.3 V tpZH VOL VOH 1.5 V GND Outputs disabled Outputs enabled 2.7 V GND Figure 3 tpLZ, tpHZ, tpZL, tpZH 6 2007-10-19 TC74LCX245F/FT/FK Package Dimensions Weight: 0.22 g (typ.) 7 2007-10-19 TC74LCX245F/FT/FK Package Dimensions Weight: 0.08 g (typ.) 8 2007-10-19 TC74LCX245F/FT/FK Package Dimensions Weight: 0.03 g (typ.) 9 2007-10-19 TC74LCX245F/FT/FK 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. 10 2007-10-19 |
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