M74HCT244

M74HCT244 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) s s s s s s HIGH SPEED: tPD = 15 ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244 DIP SOP TSSOP ORDER CODES PACKAGE DIP SOP TSSOP TUBE M74HCT244B1R M74HCT244M1R T&R M74HCT244RM13TR M74HCT244TTR DESCRIPTION The 74HCT244 is an advanced high-speed CMOS OCTAL BUS BUFFER (3-STATE) fabricated with silicon gate C2MOS technology. G control input governs four BUS BUFFERs. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS August 2001 1/9 M74HCT244 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 SYMBOL 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 1Y1 to 1Y4 2G GND VCC NAME AND FUNCTION Output Enable Input Data Inputs Data Outputs Data Inputs Data Outputs Output Enable Input Ground (0V) Positive Supply Voltage TRUTH TABLE INPUTS G L L H X : Don’t Care Z : High Impedance OUTPUT An L H X Yn L H Z ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 ± 20 ± 20 ± 35 ± 70 500(*) -65 to +150 300 Unit V V V mA mA mA mA mW °C °C ICC or IGND DC VCC or Ground Current PD Power Dissipation Tstg TL Storage Temperature Lead Temperature (10 sec) Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied (*) 500mW at 65 °C; derate to 300mW by 10mW/ °C from 65°C to 85°C RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise and Fall Time (VCC = 4.5 to 5.5V) Parameter Value 4.5 to 5.5 0 to VCC 0 to VCC -55 to 125 0 to 500 Unit V V V °C ns 2/9 M74HCT244 DC SPECIFICATIONS Test Condition Symbol Parameter VCC (V) 4.5 to 5.5 4.5 to 5.5 4.5 4.5 5.5 5.5 5.5 5.5 IO=-20 µA IO=-6.0 mA IO=20 µA IO=6.0 mA VI = VCC or GND VI = VIH or VIL VO = VCC or GND VI = VCC or GND Per Input pin VI = 0.5V or VI = 2.4V Other Inputs at VCC or GND TA = 25°C Min. 2.0 Typ. Max. Value -40 to 85°C Min. 2.0 Max. -55 to 125°C Min. 2.0 Max. V Unit VIH High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current High Impedance Output Leakage Current Quiescent Supply Current Additional Worst Case Supply Current VIL 0.8 4.4 4.18 4.5 4.31 0.0 0.17 0.1 0.26 ± 0.1 ± 0.5 4 2.0 4.4 4.13 0.8 4.4 4.10 0.1 0.33 ±1 ±5 40 2.9 0.8 V VOH VOL II IOZ V 0.1 0.40 ±1 ± 10 80 3.0 V µA µA µA mA ICC ∆ ICC AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter VCC (V) 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 CL (pF) 50 50 150 50 150 50 150 50 TA = 25°C Min. Typ. 7 15 21 15 21 17 23 16 Max. 12 22 30 25 33 30 38 30 Value -40 to 85°C Min. Max. 15 28 38 31 41 38 48 38 -55 to 125°C Min. Max. 18 33 45 38 50 45 57 45 ns ns ns ns ns Unit tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time tPLH tPHL Propagation Delay Time tPZL tPZH Output Enable Time tPLZ tPHZ Output Disable Time RL = 1 KΩ RL = 1 KΩ 3/9 M74HCT244 CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter VCC (V) TA = 25°C Min. Typ. 5 10 31 Max. 10 Value -40 to 85°C Min. Max. 10 -55 to 125°C Min. Max. 10 pF pF pF Unit CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = C PD x VCC x fIN + ICC/8 (per circuit) TEST CIRCUIT TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ CL = 50pF/150pF or equivalent (includes jig and probe capacitance) R1 = 1KΩ or equivalent RT = ZOUT of pulse generator (typically 50Ω) SWITCH Open VCC GND 4/9 M74HCT244 WAVEFORM 1: PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle) W AVEFORM 2 :OUTPUT AND ENABLE TIMES (f=1MHz; 50% duty cycle) 5/9 M74HCT244 Plastic DIP-20 (0.25) MECHANICAL DATA mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.34 8.5 2.54 22.86 7.1 3.93 0.130 0.053 0.254 1.39 0.45 0.25 25.4 0.335 0.100 0.900 0.280 0.155 1.65 TYP MAX. MIN. 0.010 0.055 0.018 0.010 1.000 0.065 TYP. MAX. inch P001J 6/9 M74HCT244 SO-20 MECHANICAL DATA mm. DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F L M S 7.40 0.50 12.60 10.00 1.27 11.43 7.60 1.27 0.75 8° (max.) 0.291 0.020 13.00 10.65 0.35 0.23 0.5 45° (typ.) 0.496 0.393 0.050 0.450 0.300 0.050 0.029 0.512 0.419 0.1 TYP MAX. 2.65 0.2 2.45 0.49 0.32 0.014 0.009 0.020 0.004 MIN. TYP. MAX. 0.104 0.008 0.096 0.019 0.012 inch PO13L 7/9 M74HCT244 TSSOP20 MECHANICAL DATA mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0° 0.45 0.60 0.05 0.8 0.19 0.09 6.4 6.2 4.3 6.5 6.4 4.4 0.65 BSC 8° 0.75 0° 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 6.6 6.6 4.48 0.002 0.031 0.007 0.004 0.252 0.244 0.169 0.256 0.252 0.173 0.0256 BSC 8° 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0089 0.260 0.260 0.176 inch A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0087225C 8/9 M74HCT244 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © The ST logo is a registered trademark of STMicroelectronics © 2001 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom © http://www.st.com 9/9