74VHC240FT,74VHC244FT CMOS Digital Integrated Circuits Silicon Monolithic 74VHC240FT,74VHC244FT74VHC240FT,74VHC244FT74VHC240FT,74VHC244FT74VHC240FT,74VHC244FT 1. 1. Functional DescriptionFunctional Description 1. 1. Functional DescriptionFunctional Description Octal Bus Buffer 74VHC240FT: INVERTED, 3-STATE OUTPUTS 74VHC244FT: NON-INVERTED, 3-STATE OUTPUTS 2. 2. 2. 2. GeneralGeneralGeneralGeneral The 74VHC240FT and 74VHC244FT are advanced high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The 74VHC240FT is an inverting 3-state buffer having two active-low output enables. The 74VHC244FT is a non-inverting 3-state buffer, and has two active-low output enables. These devices are designed to be used with 3-state memory address drivers, etc. An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. 3. 3. FeaturesFeatures 3. 3. FeaturesFeatures (1) AEC-Q100 (Rev. H) (Note 1) (2) Wide operating temperature range: T = -40 to 125 opr (3) High speed: t = 3.9 ns (typ.) at V = 5 V pd CC (4) Low power dissipation: I = 4.0 A (max) at T = 25 CC a (5) High noise immunity: V = V = 28 % V (min) NIH NIL CC (6) Power down protection is provided on all inputs. (7) Balanced propagation delays: t t PLH PHL (8) Wide operating voltage range: V = 2.0 V to 5.5 V CC(opr) (9) Low noise: V = 0.8 V (max) OLP (10) Pin and function compatible with the 74 series (AC/HC/AHC/LV etc.) 240 or 244 type. Note 1: This device is compliant with the reliability requirements of AEC-Q100. For details, contact your Toshiba sales representative. Start of commercial production 2013-03 2016 Toshiba Corporation 2016-08-18 1 Rev.4.074VHC240FT,74VHC244FT 4. 4. 4. 4. PackagingPackagingPackagingPackaging TSSOP20B 5. 5. 5. 5. Pin AssignmentPin AssignmentPin AssignmentPin Assignment 74VHC240FT 74VHC244FT 6. 6. 6. 6. MarkingMarkingMarkingMarking 74VHC240FT 74VHC244FT 2016 Toshiba Corporation 2016-08-18 2 Rev.4.0