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| M54HCT245 RAD HARD OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (NON INVERTED) s s s s s s s s s s HIGH SPEED: tPD = 13ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4A(MAX.) at TA=25C COMPATIBLE WITH TTL OUTPUTS: VIH = 2V (MIN.) VIL = 0.8V (MAX) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL PIN AND FUNCTION COMPATIBLE WITH 54 SERIES 245 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-9405-014 DILC-20 FPC-20 ORDER CODES PACKAGE DILC FPC FM M54HCT245D M54HCT245K EM M54HCT245D1 M54HCT245K1 DESCRIPTION The M54HCT245 is an advanced high-speed CMOS OCTAL BUS TRANSCEIVER (3-STATE) fabricated with silicon gate C2MOS technology. This IC is intended for two-way asynchronous communication between data buses, and the direction of data transmission is determined by DIR input. The enable input G can be used to disable the device so that the buses are effectively isolated. All inputs are equipped with protection circuits against static discharge and transient excess voltage. All floating bus terminals during High Z State must be held HIGH or LOW. PIN CONNECTION June 2004 Rev. 1 1/10 M54HCT245 Figure 1: IEC Logic Symbols Figure 2: Input And Output Equivalent Circuit Table 1: Pin Description PIN N 1 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 12, 11 19 10 20 SYMBOL DIR A1 to A8 B1 to B8 NAME AND FUNCTION Directional Control Data Inputs/Outputs Data Inputs/Outputs G GND VCC Output Enable Input Ground (0V) Positive Supply Voltage Table 2: Truth Table INPUTS G L L H X : Don't Care Z : High Impedance FUNCTION DIR L H X A BUS OUTPUT INPUT Z B BUS INPUT OUTPUT Z OUTPUT Yn A=B B=A Z 2/10 M54HCT245 Table 3: Absolute Maximum Ratings Symbol VCC VI VO IIK IOK IO PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 35 70 420 -65 to +150 265 Unit V V V mA mA mA mA mW C C ICC or IGND DC VCC or Ground Current 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 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 3/10 M54HCT245 Table 5: 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 A IO=-6.0 mA IO=20 A 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 IO = 0 TA = 25C Min. 2.0 Typ. Max. Value -40 to 85C Min. 2.0 Max. -55 to 125C 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 A A A mA ICC ICC Table 6: AC Electrical Characteristics (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter VCC (V) 4.5 4.5 4.5 CL (pF) 50 50 150 50 150 50 RL = 1 K RL = 1 K RL = 1 K TA = 25C Min. Typ. 7 13 18 19 24 17 Max. 12 22 30 30 38 30 Value -40 to 85C Min. Max. 15 28 38 38 48 38 -55 to 125C Min. Max. 18 33 45 45 57 45 ns ns ns Unit tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time tPZL tPZH High Impedance Output Enable Time tPLZ tPHZ High Impedance Output Disable Time 4.5 ns 4/10 M54HCT245 Table 7: Capacitive Characteristics Test Condition Symbol Parameter VCC (V) DIR, G An, Bn TA = 25C Min. Typ. 5 13 41 Max. 10 Value -40 to 85C Min. Max. 10 -55 to 125C Min. Max. 10 pF pF pF Unit CIN CI/OUT 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) = CPD x VCC x fIN + ICC/8 (per circuit) Figure 3: Test Circuit TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ CL = 50pF/150pF or equivalent (includes jig and probe capacitance) R1 = 1K or equivalent RT = ZOUT of pulse generator (typically 50) SWITCH Open VCC GND 5/10 M54HCT245 Figure 4: Waveform - Propagation Delay Time (f=1MHz; 50% duty cycle) Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle) 6/10 M54HCT245 DILC-20 MECHANICAL DATA mm. DIM. MIN. A a1 a2 B b b1 D E e e1 e2 F I K L 11.30 1.14 1.27 22.73 7.62 7.29 2.1 3.00 0.63 1.93 0.40 0.20 25.14 7.36 0.88 2.03 0.45 0.254 25.40 7.62 2.54 22.86 7.87 7.49 22.99 8.12 7.70 3.86 11.56 1.40 0.445 0.045 0.050 0.895 0.300 0.287 TYP MAX. 2.71 3.70 1.14 2.23 0.50 0.30 25.65 7.87 MIN. 0.083 0.118 0.025 0.076 0.016 0.008 0.990 0.290 0.035 0.080 0.018 0.010 1.000 0.300 0.100 0.900 0.310 0.295 0.905 0.320 0.303 0.152 0.455 0.055 TYP. MAX. 0.107 0.146 0.045 0.088 0.020 0.012 1.010 0.310 inch 0016178J 7/10 M54HCT245 FPC-20 MECHANICAL DATA mm. DIM. MIN. A B C D E F G H L M N O P 1.14 0.10 0.38 7.24 24.46 0.45 0.50 7.87 1.27 0.18 1.40 0.25 0.045 0.004 9.98 9.98 1.45 0.10 11.30 TYP 10.16 10.16 1.61 0.127 11.43 1.27 0.43 0.48 8.16 26.67 0.55 0.015 0.285 0.960 0.018 0.020 0.310 0.050 0.007 0.055 0.010 MAX. 10.34 10.34 1.78 0.18 11.56 MIN. 0.393 0.393 0.57 0.004 0.445 TYP. 0.400 0.400 0.63 0.005 0.450 0.050 0.017 0.019 0.320 1.050 0.022 MAX. 0.407 0.407 0.070 0.007 0.455 inch 016032F 8/10 M54HCT245 Table 8: Revision History Date 15-Jun-2004 Revision 1 First Release Description of Changes 9/10 M54HCT245 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 All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 10/10 |
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