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SN74AHCT595PWRG4 Datasheet(PDF) 11 Page - Texas Instruments |
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SN74AHCT595PWRG4 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 25 page R1 270 R2 270 R3 270 R4 270 R5 270 R6 270 R7 270 R8 270 LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 GND VCC µC VCC IC1 14 11 10 12 13 8 16 15 1 2 3 4 5 6 7 9 VCC OA OB OC OD OE OF OG OH GND SN74AHCT595 OE RCLK SRCLR SRCLK SER OH* SN54AHCT595, SN74AHCT595 www.ti.com SCLS374N – MAY 1997 – REVISED JULY 2014 10 Application and Implementation 10.1 Application Information The SNx4AHCT595 is a low-drive CMOS device that can be used for a multitude of bus interface type applications where output ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on the outputs. The input switching levels have been lowered to accommodate TTL inputs of 0.8-V VIL and 2-V VIH. This feature makes it ideal for translating up from 3.3 V to 5 V. Figure 4 shows this type of translation. 10.2 Typical Application Figure 4. Specific Application Schematic 10.2.1 Design Requirements This device uses CMOS technology and has balanced output drive. Care should be taken to avoid bus contention because it can drive currents that would exceed maximum limits. The high drive will also create fast edges into light loads so routing and load conditions should be considered to prevent ringing. 10.2.2 Detailed Design Procedure • Recommended input conditions – Specified high and low levels. See (VIH and VIL) in the Recommended Operating Conditions table. – Specified high and low levels. See (VIH and VIL) in the Recommended Operating Conditions table. – Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC • Recommend output conditions – Load currents should not exceed 25 mA per output and 50 mA total for the part – Outputs should not be pulled above VCC Copyright © 1997–2014, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: SN54AHCT595 SN74AHCT595 |
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