M54HCT245 RAD HARD OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 13ns (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) 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 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 DILC-20 FPC-20 ORDER CODES PACKAGE FM EM DILC FPC M54HCT245D M54HCT245K M54HCT245D1 M54HCT245K1 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° SYMBOL 1 2, 3, 4, 5, 6, 7, 8, 9 18, 17, 16, 15, 14, 13, 12, 11 19 10 20 DIR A1 to A8 Directional Control Data Inputs/Outputs B1 to B8 Data Inputs/Outputs G GND VCC NAME AND FUNCTION Output Enable Input Ground (0V) Positive Supply Voltage Table 2: Truth Table INPUTS OUTPUT G DIR A BUS B BUS Yn L L H L H X OUTPUT INPUT Z INPUT OUTPUT Z A=B B=A Z X : Don’t Care Z : High Impedance 2/10 FUNCTION M54HCT245 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 VCC Parameter 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 3/10 M54HCT245 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 IO = 0 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 tPZL tPZH High Impedance Output Enable Time tPLZ tPHZ High Impedance Output Disable Time 4/10 VCC (V) CL (pF) 4.5 4.5 4.5 4.5 Value TA = 25°C Min. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Typ. Max. Max. 50 7 12 15 18 ns 50 150 13 18 22 30 28 38 33 45 ns 50 RL = 1 KΩ 19 30 38 45 150 RL = 1 KΩ 24 38 48 57 50 RL = 1 KΩ 17 30 38 45 ns ns M54HCT245 Table 7: Capacitive Characteristics Test Condition Symbol Parameter CIN Input Capacitance CI/OUT Output Capacitance Power Dissipation Capacitance (note 1) CPD Value TA = 25°C VCC (V) Min. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Typ. Max. Max. DIR, G 5 10 An, Bn 13 pF 41 pF 10 10 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) Figure 3: 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 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. 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 M54HCT245 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 M54HCT245 Table 8: Revision History Date Revision 15-Jun-2004 1 Description of Changes First Release 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. 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