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SN54HC245J Datasheet(PDF) 5 Page - Texas Instruments |
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SN54HC245J Datasheet(HTML) 5 Page - Texas Instruments |
5 / 29 page SN54HC245, SN74HC245 www.ti.com SCLS131E – DECEMBER 1982 – REVISED SEPTEMBER 2015 6.4 Thermal Information SNx4HC245 DB DW N NS PW THERMAL METRIC(1) UNIT (SSOP) (SOIC) (PDIP) (SOP) (TSSOP) 20 PINS RθJA Junction-to-ambient thermal resistance 92.1 77.0 57.0 74.1 99.7 °C/W RθJC(top) Junction-to-case (top) thermal resistance 53.9 41.5 48.6 40.6 34.0 °C/W RθJB Junction-to-board thermal resistance 47.2 44.8 38.0 41.6 50.7 °C/W ψJT Junction-to-top characterization parameter 16.5 16.8 25.4 14.8 1.8 °C/W ψJB Junction-to-board characterization parameter 46.8 44.3 37.8 41.2 50.1 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 6.5 Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) TA = 25°C SN54HC245 SN74HC245 PARAMETER TEST CONDITIONS VCC UNIT MIN TYP MAX MIN MAX MIN MAX 2 V 1.9 1.998 1.9 1.9 IOH = –20 µA 4.5 V 4.4 4.499 4.4 4.4 VOH VI = VIH or VIL 6 V 5.9 5.999 5.9 5.9 V IOH = –6 mA 4.5 V 3.98 4.3 3.7 3.84 IOH = –7.8 mA 6 V 5.48 5.8 5.2 5.34 2 V 0.002 0.1 0.1 0.1 IOL = 20 µA 4.5 V 0.001 0.1 0.1 0.1 VOL VI = VIH or VIL 6 V 0.001 0.1 0.1 0.1 V IOL = 6 mA 4.5 V 0.17 0.26 0.4 0.33 IOL = 7.8 mA 6 V 0.15 0.26 0.4 0.33 II DIR or OE VI = VCC or 0 6 V ±0.1 ±100 ±1000 ±1000 nA IOZ A or B VO = VCC or 0 6 V ±0.01 ±0.5 ±10 ±5 µA ICC VI = VCC or 0, IO = 0 6 V 8 160 80 µA Ci DIR or OE 2 V to 6 V 3 10 10 10 pF 6.6 Switching Characteristics, CL = 50 pF over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3) TA = 25°C SN54HC245 SN74HC245 FROM TO PARAMETER VCC UNIT (INPUT) (OUTPUT) MIN TYP MAX MIN MAX MIN MAX 2 V 40 105 160 130 tpd A or B B or A 4.5 V 15 21 32 26 ns 6 V 12 18 27 22 2 V 125 230 340 290 ten OE A or B 4.5 V 23 46 68 58 ns 6 V 20 39 58 49 2 V 74 200 300 250 tdis OE A or B 4.5 V 25 40 60 50 ns 6 V 21 34 51 43 2 V 20 60 90 75 tt A or B 4.5 V 8 12 18 15 ns 6 V 6 10 15 13 Copyright © 1982–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: SN54HC245 SN74HC245 |
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