M54HCT244 RAD HARD OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 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 54 SERIES 244 SPACE GRADE-1: ESA SCC QUALIFIED 50 krad QUALIFIED, 100 krad AVAILABLE ON REQUEST NO SEL UNDER HIGH LET HEAVY IONS IRRADIATION DEVICE FULLY COMPLIANT WITH SCC-9402-009 DESCRIPTION The 54HCT244 is an advanced high-speed CMOS OCTAL BUS BUFFER (3-STATE) fabricated with silicon gate C2MOS technology. DILC-20 FPC-20 ORDER CODES PACKAGE FM EM DILC FPC M54HCT244D M54HCT244K M54HCT244D1 M54HCT244K1 G control input governs four BUS BUFFERs. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION June 2004 Rev. 1 1/10 M54HCT244 Figure 1: IEC Logic Symbols Figure 2: Input And Output Equivalent Circuit Table 1: Pin Description PIN N° SYMBOL 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 Output Enable Input Data Inputs Data Outputs Data Inputs 1Y1 to 1Y4 Data Outputs 2G GND VCC NAME AND FUNCTION Output Enable Input Ground (0V) Positive Supply Voltage Table 2: Truth Table INPUTS X : Don’t Care Z : High Impedance 2/10 OUTPUT G An Yn L L H L H X L H Z M54HCT244 Table 3: Absolute Maximum Ratings Symbol VCC Parameter Supply Voltage Value Unit -0.5 to +7 V VI DC Input Voltage -0.5 to VCC + 0.5 V VO DC Output Voltage -0.5 to VCC + 0.5 ± 20 V mA IIK DC Input Diode Current IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 35 mA ± 70 mA ICC or IGND DC VCC or Ground Current PD Power Dissipation Tstg Storage Temperature TL Lead Temperature (10 sec) 420 mW -65 to +150 °C 265 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied Table 4: Recommended Operating Conditions Symbol Value Unit Supply Voltage 4.5 to 5.5 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC V Top Operating Temperature -55 to 125 °C tr, tf Input Rise and Fall Time (VCC = 4.5 to 5.5V) 0 to 500 ns VCC Parameter 3/10 M54HCT244 Table 5: DC Specifications Test Condition Symbol VIH VIL VOH VOL II IOZ ICC ∆ ICC Parameter High Level Input Voltage Low Level Input Voltage Min. 4.5 to 5.5 4.5 to 5.5 4.5 Low Level Output Voltage 4.5 Input Leakage Current High Impedance Output Leakage Current Quiescent Supply Current Additional Worst Case Supply Current TA = 25°C VCC (V) High Level Output Voltage Value Typ. Max. 2.0 -40 to 85°C -55 to 125°C Min. Min. Max. 2.0 0.8 Max. 2.0 0.8 V 0.8 IO=-20 µA 4.4 4.5 4.4 4.4 IO=-6.0 mA 4.18 4.31 4.13 4.10 Unit V V IO=20 µA 0.0 0.1 0.1 0.1 IO=6.0 mA 0.17 0.26 0.33 0.40 V 5.5 VI = VCC or GND ± 0.1 ±1 ±1 µA 5.5 VI = VIH or VIL VO = VCC or GND ± 0.5 ±5 ± 10 µA 5.5 VI = VCC or GND 4 40 80 µA 5.5 Per Input pin VI = 0.5V or VI = 2.4V Other Inputs at VCC or GND 2.0 2.9 3.0 mA Table 6: AC Electrical Characteristics (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter 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 4/10 VCC (V) CL (pF) 4.5 Value TA = 25°C Min. -40 to 85°C -55 to 125°C Min. Min. Typ. Max. 50 7 12 15 18 4.5 4.5 4.5 4.5 4.5 4.5 50 150 50 150 50 150 15 21 15 21 17 23 22 30 25 33 30 38 28 38 31 41 38 48 33 45 38 50 45 57 4.5 50 16 30 38 45 RL = 1 KΩ RL = 1 KΩ Max. Unit Max. ns ns ns ns ns M54HCT244 Table 7: Capacitive Characteristics Test Condition Symbol Parameter CIN Input Capacitance COUT Output Capacitance Power Dissipation Capacitance (note 1) CPD Value TA = 25°C VCC (V) Min. Typ. Max. 5 10 -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. 10 10 pF 10 pF 31 pF 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) = CPD x VCC x fIN + ICC/8 (per circuit) Table 8: Test Circuit TEST SWITCH tPLH, tPHL Open tPZL, tPLZ VCC tPZH, tPHZ GND CL = 50pF/150pF or equivalent (includes jig and probe capacitance) R1 = 1KΩ or equivalent RT = ZOUT of pulse generator (typically 50Ω) 5/10 M54HCT244 Figure 3: Waveform - Propagation Delay Times (f=1MHz; 50% duty cycle) Figure 4: Waveform - Output And Enable Times (f=1MHz; 50% duty cycle) 6/10 M54HCT244 DILC-20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.1 2.71 0.083 0.107 a1 3.00 3.70 0.118 0.146 a2 0.63 0.88 1.14 0.025 0.035 0.045 B 1.93 2.03 2.23 0.076 0.080 0.088 b 0.40 0.45 0.50 0.016 0.018 0.020 b1 0.20 0.254 0.30 0.008 0.010 0.012 D 25.14 25.40 25.65 0.990 1.000 1.010 E 7.36 7.62 7.87 0.290 0.300 0.310 e 2.54 0.100 e1 22.73 22.86 22.99 0.895 0.900 0.905 e2 7.62 7.87 8.12 0.300 0.310 0.320 F 7.29 7.49 7.70 0.287 0.295 0.303 I 3.86 K 11.30 L 1.14 1.27 0.152 11.56 0.445 1.40 0.045 0.455 0.050 0.055 0016178J 7/10 M54HCT244 FPC-20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 9.98 10.16 10.34 0.393 0.400 0.407 B 9.98 10.16 10.34 0.393 0.400 0.407 C 1.45 1.61 1.78 0.57 0.63 0.070 D 0.10 0.127 0.18 0.004 0.005 0.007 E 11.30 11.43 11.56 0.445 0.450 0.455 F 1.27 G 0.38 H 0.48 0.015 7.24 8.16 0.285 0.320 L 24.46 26.67 0.960 1.050 M 0.45 0.55 0.018 N 0.43 0.050 0.50 7.87 0.017 0.020 0.019 0.022 0.310 O 1.14 1.27 1.40 0.045 0.050 0.055 P 0.10 0.18 0.25 0.004 0.007 0.010 016032F 8/10 M54HCT244 Table 9: Revision History Date Revision 15-Jun-2004 1 Description of Changes First Release 9/10 M54HCT244 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. 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