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SN74AHC245-EP Arkusz danych(PDF) 11 Page - Texas Instruments |
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SN74AHC245-EP Arkusz danych(HTML) 11 Page - Texas Instruments |
11 / 32 page 5 V LEDs, Relays, or other system boards OE V GND A1 A8 B1 B8 Regulated 5 V 3.3 V µC CC DIR or other system boards 5 V LEDs, Relays, or other system boards OE V GND A1 A8 B1 B8 Regulated 5 V or 3.3 V µC CC DIR 5 V LEDs, Relays, or other system boards µC SN54AHC245, SN74AHC245 www.ti.com SCLS230J – OCTOBER 1995 – REVISED JULY 2014 10 Application and Implementation 10.1 Application Information The SNx4AHC245A 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 inputs can accept voltages to 5.5 V at any valid VCC making it ideal for down translation. 10.2 Typical Application Figure 4. Typical 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. Outputs can be combined to produce higher drive but the high drive will also create faster edges into light loads, so routing and load conditions should be considered to prevent ringing. 10.2.2 Detailed Design Procedure 1. Recommended Input Conditions – Rise time and fall time specs: See ( Δt/ΔV) 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. 2. Recommend Output Conditions – Load currents should not exceed 25 mA per output and 75 mA total for the part. – Outputs should not be pulled above VCC. Copyright © 1995–2014, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: SN54AHC245 SN74AHC245 |
Podobny numer części - SN74AHC245-EP |
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Podobny opis - SN74AHC245-EP |
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