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SN74LVC257ADBLE 数据表(PDF) 6 Page - Texas Instruments |
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SN74LVC257ADBLE 数据表(HTML) 6 Page - Texas Instruments |
6 / 30 page SN54LVC257A, SN74LVC257A SCAS294O – JANUARY 1993 – REVISED JUNE 2015 www.ti.com 7.3 Recommended Operating Conditions See (1) SN54LVC257A SN74LVC257A UNIT MIN MAX MIN MAX Operating 2 3.6 1.65 3.6 VCC Supply voltage V Data retention only 1.5 1.5 VCC = 1.65 V to 1.95 V 0.65 × VCC VIH High-level input voltage VCC = 2.3 V to 2.7 V 1.7 V VCC = 2.7 V to 3.6 V 2 2 VCC = 1.65 V to 1.95 V 0.35 × VCC VIL Low-level input voltage VCC = 2.3 V to 2.7 V 0.7 V VCC = 2.7 V to 3.6 V 0.8 0.8 VI Input voltage 0 5.5 0 5.5 V VO Output voltage 0 VCC 0 VCC V VCC = 1.65 V –4 VCC = 2.3 V –8 IOH High-level output current mA VCC = 2.7 V –12 –12 VCC = 3 V –24 –24 VCC = 1.65 V 4 VCC = 2.3 V 8 IOL Low-level output current mA VCC = 2.7 V 12 12 VCC = 3 V 24 24 Δt/Δv Input transition rise or fall rate 10 10 ns/V TA Operating free-air temperature –55 125 –40 85 °C (1) All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, SCBA004. 7.4 Thermal Information: 16-Pin Packages SN54LVC257A, SN74LVC257A THERMAL METRIC(1) D (SOIC)(2) DB (SSOP)(2) NS (SO)(2) PW (TSSOP)(2) UNIT 16 PINS RθJA Junction-to-ambient thermal resistance 73 82 64 108 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. (2) The package thermal impedance is calculated in accordance with JESD 51-7. 7.5 Thermal Information: 20-Pin Package SN54LVC257A THERMAL METRIC(1) RGY (LCCC)(2) UNIT 20 PINS RθJA Junction-to-ambient thermal resistance 39 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. (2) The package thermal impedance is calculated in accordance with JESD 51-5. 6 Submit Documentation Feedback Copyright © 1993–2015, Texas Instruments Incorporated Product Folder Links: SN54LVC257A SN74LVC257A |
类似零件编号 - SN74LVC257ADBLE |
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类似说明 - SN74LVC257ADBLE |
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