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HD74LS640 Datasheet(PDF) 2 Page - Renesas Technology Corp |
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HD74LS640 Datasheet(HTML) 2 Page - Renesas Technology Corp |
2 / 7 page HD74LS640 Rev.2.00, Feb.18.2005, page 2 of 6 Block Diagram A B Direction Control DIR Transceiver (1/8) Enable G Absolute Maximum Ratings Item Symbol Ratings Unit Supply voltage VCC 7 V Input voltage VIN 7 V Power dissipation PT 400 mW Storage temperature Tstg –65 to +150 °C Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Symbol Min Typ Max Unit Supply voltage VCC 4.75 5.00 5.25 V IOH — — –15 mA Output current IOL — — 24 mA Operating temperature Topr –20 25 75 °C Electrical Characteristics (Ta = –20 to +75 °C) Item Symbol min. typ.* max. Unit Condition VIH 2.0 — — V Input voltage VIL — — 0.8 V Hysteresis VT + – V T – 0.2 — — V VCC = 4.75 V 2.4 — — V IOH = –3 mA VOH 2 — — V IOH = –15 mA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V — — 0.4 V IOL = 12 mA Output voltage VOL — — 0.5 V IOL = 24 mA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V IOZH — — 20 µA VO = 2.7 V Output current IOZL — — –400 µA VO = 0.4 V VCC = 5.25 V, G input = 2 V IIH — — 20 µA VCC = 5.25 V, VI = 2.7 V IIL — — –400 µA VCC = 5.25 V, VI = 0.4 V A or B — — 0.1 mA VI = 5.5 V Input current DIR or G II — — 0.1 mA VI = 7 V VCC = 5.25 V Short-circuit output current IOS** –40 — –225 mA VCC = 5.25 V ICCH — 48 70 mA ICCL — 62 90 mA Supply current ICCZ — 64 95 mA VCC = 5.25 V, Output open Input clamp voltage VIK — — –1.5 V VCC = 4.75 V, IIN = –18 mA Notes: * VCC = 5 V, Ta = 25°C ** Not more than one output shall be shorted at a time. the duration of the short circuit shall not exceed one second. |
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