TC74LCX244F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX244F,TC74LCX244FT,TC74LCX244FK Low-Voltage Octal Bus Buffer with 5-V Tolerant Inputs and Outputs The TC74LCX244 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 74LCX244F/FT is a non-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. TC74LCX244F TC74LCX244FT 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 TC74LCX244FK (74AC/VHC/HC/F/ALS/LS etc.) 244 type Weight SOP20-P-300-1.27A TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50 : 0.22 g (typ.) : 0.08 g (typ.) : 0.03 g (typ.) Note: The Electrical Characteristics of VCC=1.8±0.15V is only applicable for products which manufactured from January 2009 onward. 1 2010-01-31 TC74LCX244F/FT/FK Pin Assignment (top view) IEC Logic Symbol 1 20 VCC 1A1 2 19 2OE 2Y4 3 18 1Y1 1A2 4 17 2A4 2Y3 5 16 1Y2 1OE 1OE 1A1 1A2 1A3 1A4 2OE 1A3 6 15 2A3 2Y2 7 14 1Y3 1A4 8 13 2A2 2Y1 9 12 1Y4 GND 10 11 2A1 2A1 2A2 2A3 2A4 1 EN 2 4 6 8 19 11 13 15 17 18 16 14 12 1Y1 1Y2 1Y3 1Y4 EN 9 7 5 3 2Y1 2Y2 2Y3 2Y4 Truth Table Inputs OE An Outputs L L L L H H H X Z X: Don’t care Z: High impedance 2 2010-01-31 TC74LCX244F/FT/FK Absolute Maximum Ratings (Note 1) Symbol Rating Unit Power supply voltage Characteristics 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 V (Note 3) IIK −50 Output diode current IOK ±50 DC output current IOUT ±50 mA Input diode current Power dissipation DC VCC/ground current Storage temperature mA (Note 4) mA PD 180 mW ICC/IGND ±100 mA Tstg −65 to 150 °C 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 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 2010-01-31 TC74LCX244F/FT/FK Electrical Characteristics DC Characteristics (Ta = −40 to 85°C) Characteristics H-level Symbol Test Condition Min Max 1.65 to 2.3 VCC×0.9 ⎯ 2.3 to 2.7 1.7 ⎯ 2.7 to 3.6 2.0 ⎯ 1.65 to 2.3 ⎯ VCC×0.1 2.3 to 2.7 ⎯ 0.7 2.7 to 3.6 ⎯ 0.8 1.65 to 3.6 VCC−0.2 ⎯ 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 μA 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 1.65 to 3.6 ⎯ ±5.0 μA 1.65 to 3.6 ⎯ ±5.0 μA VIN/VOUT = 5.5 V 0 ⎯ 10.0 μA 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 VIH = VCC − 0.6V 2.7 to 3.6 ⎯ 500 ⎯ VIH Input voltage L-level ⎯ VIL IOH = −100 μA H-level VOH 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 VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V 4 VCC (V) Unit V V μA 2010-01-31 TC74LCX244F/FT/FK 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 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 = 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 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) = CPD · VCC · fIN + ICC/8 (per bit) 5 2010-01-31 TC74LCX244F/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 VCC×2 GND @ VCC =3.3±0.3V @ VCC =2.7V VCC×2 @ VCC =2.5±0.2V @ VCC =1.8±0.15V tpHZ, tpZH GND Figure 1 6 2010-01-31 TC74LCX244F/FT/FK AC Waveform tr tf VIH 90% VIM Input (A) 10% 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 500Ω 500Ω 1kΩ 7 2010-01-31 TC74LCX244F/FT/FK Package Dimensions Weight: 0.22 g (typ.) 8 2010-01-31 TC74LCX244F/FT/FK Package Dimensions Weight: 0.08 g (typ.) 9 2010-01-31 TC74LCX244F/FT/FK Package Dimensions Weight: 0.03 g (typ.) 10 2010-01-31 TC74LCX244F/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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