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SN74AHC244DBLE 数据表(PDF) 5 Page - Texas Instruments |
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SN74AHC244DBLE 数据表(HTML) 5 Page - Texas Instruments |
5 / 31 page SN54AHC244, SN74AHC244 www.ti.com SCLS226K – OCTOBER 1995 – REVISED JULY 2014 7.4 Thermal Information SN74AHCT244 THERMAL METRIC(1) DB DGV DW N NS PW UNIT 20 PINS 20 PINS 20 PINS 20 PINS 20 PINS 20 PINS RθJA Junction-to-ambient thermal resistance 99.9 119.2 83.0 54.9 80.4 105.4 RθJC(top) Junction-to-case (top) thermal resistance 61.7 34.5 48.9 41.7 46.9 39.5 RθJB Junction-to-board thermal resistance 55.2 60.7 50.5 35.8 47.9 56.4 °C/W ψJT Junction-to-top characterization parameter 22.6 1.2 21.1 27.9 19.9 3.1 ψJB Junction-to-board characterization parameter 54.8 60.0 50.1 35.7 47.5 55.8 RθJC(bot) Junction-to-case (bottom) thermal resistance n/a n/a n/a n/a n/a n/a (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. 7.5 Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) TA = 25°C SN54AHC244 SN74AHC244 PARAMETER TEST CONDITIONS VCC UNIT MIN TYP MAX MIN MAX MIN MAX 2 V 1.9 2 1.9 1.9 IOH = –50 µA 3 V 2.9 3 2.9 2.9 VOH 4.5 V 4.4 4.5 4.4 4.4 V IOH = –4 mA 3 V 2.58 2.48 2.48 IOH = –8 mA 4.5 V 3.94 3.8 3.8 2 V 0.1 0.1 0.1 IOL = 50 µA 3 V 0.1 0.1 0.1 VOL 4.5 V 0.1 0.1 0.1 V IOL = 4 mA 3 V 0.36 0.5 0.44 IOL = 8 mA 4.5 V 0.36 0.5 0.44 0 V to 5.5 II VI = 5.5 V or GND ±0.1 ±1(1) ±1 µA V VO = VCC or GND, IOZ 5.5 V ±0.25 ±2.5 ±2.5 µA VI (OE) = VIL or VIH ICC VI = VCC or GND, IO = 0 5.5 V 4 40 40 µA Ci VI = VCC or GND 5 V 2 10 10 pF Co VO = VCC or GND 5 V 3.5 pF (1) On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V. Copyright © 1995–2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: SN54AHC244 SN74AHC244 |
类似零件编号 - SN74AHC244DBLE |
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类似说明 - SN74AHC244DBLE |
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