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 TC74LCX245FK (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 1 : 0.22g (typ.) : 0.08 g (typ.) : 0.03 g (typ.) 2007-10-19 TC74LCX245F/FT/FK Pin Assignment (top view) IEC Logic Symbol OE DIR DIR 1 20 VCC A1 2 19 OE A2 3 18 B1 A3 4 17 B2 A4 5 16 B3 A2 A5 6 15 B4 A3 A6 7 14 B5 A7 8 13 B6 9 12 B7 GND 10 11 B8 G3 3EN1 (BA) 3EN2 (AB) A1 2 18 1 B1 2 A4 A5 A8 19 1 A6 A7 A8 3 17 4 16 5 15 6 14 7 13 B6 8 12 B7 9 11 B8 B2 B3 B4 B5 Truth Table Inputs OE DIR L L L H Outputs Function A-Bus B-Bus A=B Output Input H B=A Input Output X Z Z X: Don’t care Z: High impedance 2 2007-10-19 TC74LCX245F/FT/FK Absolute Maximum Ratings (Note 1) Characteristics Power supply voltage Symbol Rating Unit VCC −0.5 to 7.0 V VIN −0.5 to 7.0 V DC input voltage (DIR, OE ) −0.5 to 7.0 (Note 2) DC bus I/O voltage VI/O −0.5 to VCC + 0.5 V (Note 3) Input diode current IIK −50 Output diode current IOK ±50 DC output current IOUT ±50 mA Power dissipation PD 180 mW ICC/IGND ±100 mA Tstg −65 to 150 °C DC VCC/ground current Storage temperature mA (Note 4) mA 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 Symbol VCC Input voltage Rating 2.0 to 3.6 1.5 to 3.6 (Note 2) 0 to 5.5 VIN (DIR, OE ) Bus I/O voltage VI/O Output current IOH/IOL Unit V 0 to 5.5 (Note 3) 0 to VCC (Note 4) ±24 (Note 5) ±12 (Note 6) Operating temperature Topr −40 to 85 Input rise and fall time dt/dv 0 to 10 V V mA °C (Note 7) ns/V 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 85°C) Characteristics Input voltage Symbol Test Condition H-level VIH ⎯ L-level VIL ⎯ H-level VOH Min Max 2.7 to 3.6 2.0 ⎯ 2.7 to 3.6 ⎯ 0.8 IOH = −100 μA 2.7 to 3.6 VCC − 0.2 ⎯ IOH = −12 mA 2.7 2.2 ⎯ IOH = −18 mA 3.0 2.4 ⎯ IOH = −24 mA 3.0 2.2 ⎯ IOL = 100 μA 2.7 to 3.6 ⎯ 0.2 IOL = 12 mA 2.7 ⎯ 0.4 IOL = 16 mA 3.0 ⎯ 0.4 IOL = 24 mA 3.0 ⎯ 0.55 2.7 to 3.6 ⎯ ±5.0 μA 2.7 to 3.6 ⎯ ±5.0 μA 0 ⎯ 10.0 μA VIN = VCC or GND 2.7 to 3.6 ⎯ 10.0 VIN/VOUT = 3.6 to 5.5 V 2.7 to 3.6 ⎯ ±10.0 VIH = VCC − 0.6 V 2.7 to 3.6 ⎯ 500 Min Max 2.7 ⎯ 8.0 3.3 ± 0.3 1.5 7.0 2.7 ⎯ 9.5 3.3 ± 0.3 1.5 8.5 2.7 ⎯ 8.5 3.3 ± 0.3 1.5 7.5 2.7 ⎯ ⎯ 3.3 ± 0.3 ⎯ 1.0 VIN = VIH or VIL Output voltage L-level VOL Input leakage current IIN 3-state output OFF state current IOZ Power-off leakage current IOFF Quiescent supply current ICC Increase in ICC per input ΔICC VIN = VIH or VIL VCC (V) VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V VIN/VOUT = 5.5 V Unit V V μA AC Characteristics (Ta = −40 to 85°C) Characteristics Propagation delay time Output enable time Output disable time Output to output skew Note: Symbol tpLH tpHL tpZL tpZH tpLZ tpHZ Test Condition VCC (V) Figure 1, Figure 2 Figure 1, Figure 3 Figure 1, Figure 3 tosLH (Note) tosHL Unit ns ns ns ns Parameter guaranteed by design. (tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|) 4 2007-10-19 TC74LCX245F/FT/FK Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω) Characteristics Symbol Test Condition VCC (V) Typ. Unit Quiet output maximum dynamic VOL VOLP VIH = 3.3 V, VIL = 0 V 3.3 0.8 V Quiet output minimum dynamic VOL |VOLV| VIH = 3.3 V, VIL = 0 V 3.3 0.8 V Typ. Unit Capacitive Characteristics (Ta = 25°C) Characteristics Symbol Test Condition VCC (V) Input capacitance CIN DIR, OE 3.3 7 pF Bus input capacitance CI/O An, Bn 3.3 8 pF Power dissipation capacitance CPD fIN = 10 MHz 3.3 25 pF Note: (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) = CPD･VCC･fIN + ICC/8 (per bit) AC Test Circuit RL Switch RL Measure CL Output Open 6.0 V GND CL = 50 pF Parameter Switch tpLH, tpHL Open tpLZ, tpZL 6.0 V tpHZ, tpZH GND RL = 500 Ω Figure 1 AC Waveform tr 2.5 ns tf 2.5 ns 2.7 V 90% 1.5 V Input (An, Bn) 10% GND VOH Output (Bn, An) 1.5 V tpHL tpLH VOL Figure 2 tpLH, tpHL 5 2007-10-19 TC74LCX245F/FT/FK tr 2.5 ns tf 2.5 ns 2.7 V 90% 1.5 V Output Enable ( OE ) 10% tpLZ GND tpZL 3.0 V Output (An, Bn) Low to Off to Low 1.5 V tpHZ VOL + 0.3 V VOH − 0.3 V Output (An, Bn) High to Off to High VOL tpZH VOH 1.5 V GND Outputs enabled Outputs disabled Outputs enabled 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 20070701-EN • The information contained herein is subject to change without notice. • 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