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SN74HC244-Q1 Fiches technique(PDF) 11 Page - Texas Instruments |
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SN74HC244-Q1 Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 32 page 1OE 1 1A1 2 18 1Y1 1A2 4 16 1Y1 1A3 6 14 1Y1 1A4 8 12 1Y4 2OE 19 2A1 11 9 1Y1 2A2 13 7 1Y1 2A3 15 5 1Y1 2A4 17 3 1Y4 Copyright © 2016, Texas Instruments Incorporated 11 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The SNx4HC244 device is organized as two 4-bit buffers and line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current- sinking capability of the driver. 8.2 Functional Block Diagram 8.3 Feature Description The SNx4HC244 has a wide operating voltage of 2 V to 6 V. Inputs accept voltage levels up to VCC. This device has a low power consumption of ICC 80 µA (maximum). The SNx4HC244 device can drive ±6 mA at VCC of 5 V. 8.4 Device Functional Modes Table 2 lists the functions of the SNx4HC244. Table 2. Function Table (Each Buffer or Driver) INPUTS OUTPUT OE A Y L H H L L L H X Z |
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Description similaire - SN74HC244-Q1 |
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