TC74VHC240,244F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC240F,TC74VHC240FT,TC74VHC240FK TC74VHC244F,TC74VHC244FT,TC74VHC244FK Octal Bus Buffer TC74VHC240F/FT/FK Inverted, 3-State Outputs TC74VHC244F/FT/FK Non-Inverted, 3-State Outputs The TC74VHC240 and 244 are advanced high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The 74VHC240 is an inverting 3-state buffer having two active-low output enables. The TC74VHC244 is a non-inverting 3-state buffer, and has two active-low output enables. These devices are designed to be used with 3-state memory address drivers, etc. An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. TC74VHC240F, TC74VHC244F TC74VHC240FT, TC74VHC244FT TC74VHC240FK, TC74VHC244FK Features • High speed: tpd = 3.9 ns (typ.) at VCC = 5 V • Low power dissipation: ICC = 4 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • • Power down protection is provided on all inputs. ∼ tpHL Balanced propagation delays: tpLH − • Wide operating voltage range: VCC (opr) = 2 to 5.5 V • Low noise: VOLP = 0.8 V (max) • Pin and function compatible with 74ALS240/244 Weight SOP20-P-300-1.27A 1 : 0.22 g (typ.) TSSOP20-P-0044-0.65A : 0.08 g (typ.) VSSOP20-P-0030-0.50 : 0.03 g (typ.) 2009-04-01 TC74VHC240,244F/FT/FK Pin Assignment TC74VHC244 TC74VHC240 1G 1 20 VCC 1G 1 20 VCC 1A1 2 19 2G 1A1 2 19 2G 3 18 1Y1 2Y4 3 18 1Y1 1A2 4 17 2A4 1A2 4 17 2A4 2Y3 5 16 1Y 2 2Y3 5 16 1Y2 1A3 6 15 2A3 1A3 6 15 2A3 2Y 2 7 14 1Y3 2Y2 7 14 1Y3 1A4 8 13 2A2 1A4 8 13 2A2 2Y1 9 12 1Y 4 2Y1 9 12 1Y4 GND 10 11 2A1 GND 10 11 2A1 2Y 4 (top view) (top view) IEC Logic Symbol TC74VHC244 TC74VHC240 1G 1A1 1A2 1A3 1A4 2G 2A1 2A2 2A3 2A4 (1) 1G EN (2) (4) (18) (16) (14) (6) (8) (19) (12) 1A1 1A2 1A3 1A4 1Y1 1Y 2 1Y3 1Y 4 2G EN (11) (13) (15) (17) (9) (7) (5) (3) 2A1 2A2 2A3 2A4 2Y1 2Y 2 2Y3 2Y 4 (1) EN (2) (4) (18) (16) (6) (8) (14) (12) (19) (11) (13) (15) (17) 1Y1 1Y2 1Y3 1Y4 EN (9) (7) (5) (3) 2Y1 2Y2 2Y3 2Y4 Truth Table Inputs Outputs G An Yn Yn L L L H L H H L H X Z Z X: Don’t care Z: High impedance Yn: TC74VHC244 Y n : TC74VHC240 2 2009-04-01 TC74VHC240,244F/FT/FK Absolute Maximum Ratings (Note) Characteristics Symbol Rating Unit Supply voltage range VCC −0.5 to 7.0 V DC input voltage VIN −0.5 to 7.0 V VOUT −0.5 to VCC + 0.5 V Input diode current IIK −20 mA Output diode current IOK ±20 mA DC output current IOUT ±25 mA DC VCC/ground current ICC ±75 mA Power dissipation PD 180 mW Storage temperature Tstg −65 to 150 °C DC output voltage Note: 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). Operating Ranges (Note) Characteristics Symbol Rating Unit Supply voltage VCC 2.0 to 5.5 V Input voltage VIN 0 to 5.5 V VOUT 0 to VCC V Operating temperature Topr −40 to 85 °C Input rise and fall time dt/dv Output voltage Note: 0 to 100 (VCC = 3.3 ± 0.3 V) 0 to 20 (VCC = 5 ± 0.5 V) ns/V The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. 3 2009-04-01 TC74VHC240,244F/FT/FK Electrical Characteristics DC Characteristics Characteristics Min Typ. Max Min Max 2.0 1.50 ⎯ ⎯ 1.50 ⎯ 3.0 to 5.5 VCC × 0.7 ⎯ ⎯ 2.0 ⎯ ⎯ 0.50 3.0 to 5.5 ⎯ ⎯ VCC × 0.3 ― VCC × 0.3 2.0 1.9 2.0 ⎯ 1.9 ⎯ 3.0 2.9 3.0 ⎯ 2.9 ⎯ 4.5 4.4 4.5 ⎯ 4.4 ⎯ IOH = −4 mA 3.0 2.58 ⎯ ⎯ 2.48 ⎯ IOH = −8 mA 4.5 3.94 ⎯ ⎯ 3.80 ⎯ 2.0 ⎯ 0.0 0.1 ⎯ 0.1 3.0 ⎯ 0.0 0.1 ⎯ 0.1 4.5 ⎯ 0.0 0.1 ⎯ 0.1 IOL = 4 mA 3.0 ⎯ ⎯ 0.36 ⎯ 0.44 IOL = 8 mA 4.5 ⎯ ⎯ 0.36 ⎯ 0.44 5.5 ⎯ ⎯ ±0.25 ⎯ ±2.50 μA VIH ⎯ Low-level input voltage VIL ⎯ IOH = −50 μA VOH VIN = VIH or VIL IOL = 50 μA Low-level output voltage VOL Unit VCC (V) High-level input voltage High-level output voltage Ta = −40 to 85°C Ta = 25°C Test Condition Symbol VIN = VIH or VIL VIN = VIH or VIL VCC × 0.7 ― ⎯ V 0.50 V V V 3-state output off-state current IOZ Input leakage current IIN VIN = 5.5 V or GND 0 to 5.5 ⎯ ⎯ ±0.1 ⎯ ±1.0 μA Quiescent supply current ICC VIN = VCC or GND 5.5 ⎯ ⎯ 4.0 ⎯ 40.0 μA VOUT = VCC or GND 4 2009-04-01 TC74VHC240,244F/FT/FK AC Characteristics (input: tr = tf = 3 ns) Characteristics VCC (V) Propagation delay time tpLH (TC74VHC240) tpHL Propagation delay time tpLH (TC74VHC244) tpHL 3-state output enable time 3-state output disable time Output to output skew Input capacitance Output capacitance Power dissipation capacitance (Note 2) tpZL tpZH tpLZ tpHZ tosLH tosHL CL (pF) Min Typ. Max Min Max 15 ⎯ 5.3 7.5 1.0 9.0 50 ⎯ 7.8 11.0 1.0 12.5 15 ⎯ 3.6 5.5 1.0 6.5 50 ⎯ 5.1 7.5 1.0 8.5 15 ⎯ 5.8 8.4 1.0 10.0 50 ⎯ 8.3 11.9 1.0 13.5 15 ⎯ 3.9 5.5 1.0 6.5 50 ⎯ 5.4 7.5 1.0 8.5 15 ⎯ 6.6 10.6 1.0 12.5 50 ⎯ 9.1 14.1 1.0 16.0 15 ⎯ 4.7 7.3 1.0 8.5 50 ⎯ 6.2 9.3 1.0 10.5 3.3 ± 0.3 50 ⎯ 10.3 14.0 1.0 16.0 5.0 ± 0.5 50 ⎯ 6.7 9.2 1.0 10.5 3.3 ± 0.3 50 ⎯ ⎯ 1.5 ⎯ 1.5 5.0 ± 0.5 50 ⎯ ⎯ 1.0 ⎯ 1.0 3.3 ± 0.3 ⎯ 5.0 ± 0.5 3.3 ± 0.3 ⎯ 5.0 ± 0.5 3.3 ± 0.3 RL = 1 kΩ 5.0 ± 0.5 RL = 1 kΩ (Note 1) Ta = −40 to 85°C Ta = 25°C Test Condition Symbol Unit ns ns ns ns ns CIN ⎯ ⎯ 4 10 ⎯ 10 pF COUT ⎯ ⎯ 6 ⎯ ⎯ ⎯ pF TC74VHC240 ⎯ 17 ⎯ ⎯ ⎯ TC74VHC244 ⎯ 19 ⎯ ⎯ ⎯ CPD pF 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) Noise Characteristics (input: tr = tf = 3 ns) Characteristics Ta = 25°C Test Condition Symbol VCC (V) Typ. Limit Unit Quiet output maximum dynamic VOL VOLP CL = 50 pF 5.0 0.5 0.8 V Quiet output minimum dynamic VOL VOLV CL = 50 pF 5.0 −0.5 −0.8 V Minimum high level dynamic input voltage VIHD CL = 50 pF 5.0 ⎯ 3.5 V Maximum low level dynamic input voltage VILD CL = 50 pF 5.0 ⎯ 1.5 V 5 2009-04-01 TC74VHC240,244F/FT/FK Input Equivalent Circuit INPUT 6 2009-04-01 TC74VHC240,244F/FT/FK Package Dimensions Weight: 0.22 g (typ.) 7 2009-04-01 TC74VHC240,244F/FT/FK Package Dimensions Weight: 0.08 g (typ.) 8 2009-04-01 TC74VHC240,244F/FT/FK Package Dimensions Weight: 0.03 g (typ.) 9 2009-04-01 TC74VHC240,244F/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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