TC74LCX240F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX240F, TC74LCX240FT, TC74LCX240FK Low-Voltage Octal Bus Buffer (inverted) with 5-V Tolerant Inputs and Outputs The TC74LCX240 is a high-performance CMOS octal bus buffer. 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 74LCX240F/FT is an inverting 3-state buffer having two active-low output enables. This device is designed to be used with 3-state memory address drivers, etc. All inputs are equipped with protection circuits against static discharge. TC74LCX240F TC74LCX240FT Features * Low-voltage operation: VCC = 1.65 to 3.6 V * High-speed operation: tpd = 6.5 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) * Power-down protection provided on all inputs and outputs * Pin and function compatible with the 74 series (74AC/VHC/HC/F/ALS/LS etc.) 240 type TC74LCX240FK 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.) Note: The Electrical Characteristics of VCC=1.80.15V is only applicable for products which manufactured from January 2009 onward. Start of commercial production 1994-03 1 2014-03-01 TC74LCX240F/FT/FK Pin Assignment (top view) IEC Logic Symbol 1OE 1 20 VCC 1A1 2 19 2OE 2Y 4 3 18 1Y1 1A2 4 17 2A4 2Y3 5 16 1Y 2 1OE 1A1 1A2 1A3 1A4 2OE 1A3 6 15 2A3 2Y2 7 14 1Y 3 1A4 8 13 2A2 2 Y1 9 12 1Y 4 GND 10 11 2A1 2A1 2A2 2A3 2A4 1 EN 2 4 6 8 19 18 16 14 12 1Y1 1Y 2 1Y 3 1Y 4 EN 11 13 15 17 9 7 5 3 2 Y1 2Y2 2Y3 2Y 4 Truth Table Inputs Outputs OE An L L L H L H X Z H X: Don't care Z: High impedance Absolute Maximum Ratings (Note 1) Characteristics Symbol Rating Unit Power supply voltage VCC -0.5 to 7.0 V DC input voltage VIN -0.5 to 7.0 V -0.5 to 7.0 (Note 2) DC output voltage VOUT -0.5 to VCC + 0.5 (Note 3) V 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 2 2014-03-01 TC74LCX240F/FT/FK Operating Ranges (Note 1) Characteristics Symbol Power supply voltage VCC Input voltage VIN Output voltage VOUT Output current IOH/IOL Rating Unit 1.65 to 3.6 1.5 to 3.6 (Note 2) 0 to 5.5 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 must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. 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 2014-03-01 TC74LCX240F/FT/FK Electrical Characteristics DC Characteristics (Ta = -40 to 85C) Characteristics Symbol Test Condition Min Max Unit VCC (V) H-level VIH Input voltage L-level VIL 1.65 to 2.3 VCCx0.9 2.3 to 2.7 1.7 2.7 to 3.6 2.0 1.65 to 2.3 VCCx0.1 2.3 to 2.7 0.7 2.7 to 3.6 0.8 VCC-0.2 IOH = -100 A 1.65 to 3.6 H-level VOH VIN = VIH or VIL Output voltage L-level VOL VIN = VIH or VIL IOH = -4 mA 1.65 1.05 IOH = -8 mA 2.3 1.7 IOH = -12 mA 2.7 2.2 IOH = -18 mA 3.0 2.4 IOH = -24 mA 3.0 2.2 IOL = 100 A 1.65 to 3.6 0.2 IOL = 4 mA 1.65 0.45 IOL = 8 mA 2.3 0.7 IOL = 12 mA 2.7 0.4 IOL = 16 mA 3.0 0.4 IOL = 24 mA 3.0 0.55 V V Input leakage current IIN VIN = 0 to 5.5 V 1.65 to 3.6 5.0 A 3-state output OFF state current IOZ VIN = VIH or VIL VOUT = 0 to 5.5 V 1.65 to 3.6 5.0 A Power-off leakage current IOFF VIN/VOUT = 5.5 V 0 10.0 A Quiescent supply current ICC VIN = VCC or GND 1.65 to 3.6 10.0 VIN/VOUT = 3.6 to 5.5 V 1.65 to 3.6 10.0 Increase in ICC per input ICC VIH = VCC - 0.6 V 2.7 to 3.6 500 4 A 2014-03-01 TC74LCX240F/FT/FK AC Characteristics (Ta = -40 to 85C) Characteristics Propagation delay time Output enable time Output disable time Output to output skew Note: Symbol tpLH tpHL tpZL tpZH tpLZ tpHZ Test Condition Figure 1, Figure 2 Figure 1, Figure 3 Figure 1, Figure 3 tosLH (Note) tosHL Min Max 1.8 0.15 25.0 2.5 0.2 8.5 2.7 7.5 3.3 0.3 1.5 6.5 1.8 0.15 32.0 2.5 0.2 16.0 2.7 9.0 3.3 0.3 1.5 8.0 1.8 0.15 30.0 2.5 0.2 15.0 2.7 8.0 3.3 0.3 1.5 7.0 2.7 3.3 0.3 1.0 VCC (V) Unit ns ns ns ns Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|) Dynamic Switching Characteristics (Ta = 25C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 ) 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 = 25C) Characteristics Input capacitance Output capacitance Power dissipation capacitance Note: Symbol Test Condition CIN 3.3 7 pF COUT 3.3 8 pF 3.3 25 pF CPD fIN = 10 MHz VCC (V) (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) 5 2014-03-01 TC74LCX240F/FT/FK AC Test Circuit RL Switch Parameter Switch tpLH, tpHL Open 6.0 V Measure tpLZ, tpZL RL CL Output Open 6.0 V or VCCx2 GND @ VCC =3.30.3V @ VCC =2.7V VCCx2 @ VCC =2.50.2V @ VCC =1.80.15V tpHZ, tpZH GND Figuare 1 6 2014-03-01 TC74LCX240F/FT/FK AC Waveform tf tr VIH 90% VIM 10% Input (A) GND VOH Output (Y ) VOM tpLH VOL tpHL Figure 2 tpLH, tpHL tr tf 90% VIM Output Enable ( OE ) VIH 10% tpLZ GND tpZL VOH Output ( Y ) Low to Off to Low VOM tpHZ VX VOL tpZH VOH VY Output ( Y ) High to Off to High VOM GND Outputs enabled Outputs enabled Outputs disabled Figure 3 tpLZ, tpHZ, tpZL, tpZH VCC Symbol 3.3 0.3 V 2.7V Input Output Load 2.5 0.2 V 1.8 0.15 V VIH 2.7V VCC VCC VIM 1.5V VCC/2 VCC/2 tr, tf 2.5ns 2.0ns 2.0ns VOM 1.5V VOH/2 VOH/2 VX VOL +0.3V VOL +0.15V VOL +0.15V VY VOH -0.3V VOH -0.15V VOH -0.15V CL 50pF 30pF 30pF RL 500 500 1k 7 2014-03-01 TC74LCX240F/FT/FK Package Dimensions Weight: 0.22 g (typ.) 8 2014-03-01 TC74LCX240F/FT/FK Package Dimensions Weight: 0.08 g (typ.) 9 2014-03-01 TC74LCX240F/FT/FK Package Dimensions Weight: 0.03 g (typ.) 10 2014-03-01 TC74LCX240F/FT/FK RESTRICTIONS ON PRODUCT USE * Toshiba Corporation, and its subsidiaries and affiliates (collectively "TOSHIBA"), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively "Product") without notice. * This document and any information herein may not be reproduced without prior written permission from TOSHIBA. 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