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74VHCT245ATTR 데이터시트(PDF) 1 Page - STMicroelectronics |
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74VHCT245ATTR 데이터시트(HTML) 1 Page - STMicroelectronics |
1 / 13 page 1/13 December 2004 s HIGH SPEED: tPD = 4.5 ns (TYP.) at VCC = 5V s LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA=25°C s COMPATIBLE WITH TTL OUTPUTS: VIH = 2V (MIN.), VIL = 0.8V (MAX) s POWER DOWN PROTECTION ON INPUTS & OUTPUTS s SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 mA (MIN) s BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL s OPERATING VOLTAGE RANGE: VCC(OPR) = 4.5V to 5.5V s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 245 s IMPROVED LATCH-UP IMMUNITY s LOW NOISE: VOLP = 0.9V (MAX.) DESCRIPTION The 74VHCT245A is an advanced high-speed CMOS OCTAL BUS TRANSCEIVER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. This IC is intended for two-way asynchronous communication between data busses; the direction of data transmission is determined by DIR input. The enable input G can be used to disable the device so that the busses are effectively isolated. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. All floating bus terminals during High Z State must be held HIGH or LOW. 74VHCT245A OCTAL BUS TRANSCEIVER (3-STATE) Figure 1: Pin Connection And IEC Logic Symbols Table 1: Order Codes PACKAGE T & R SOP 74VHCT245AMTR TSSOP 74VHCT245ATTR TSSOP SOP Rev. 4 |
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