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SN74LS174 Datasheet(PDF) 3 Page - ON Semiconductor |
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SN74LS174 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 8 page SN74LS174 http://onsemi.com 3 FUNCTIONAL DESCRIPTION The LS174 consists of six edge-triggered D flip-flops with individual D inputs and Q outputs. The Clock (CP) and Master Reset (MR) are common to all flip-flops. Each D input’s state is transferred to the corresponding flip-flop’s output following the LOW to HIGH Clock (CP) transition. A LOW input to the Master Reset (MR) will force all outputs LOW independent of Clock or Data inputs. The LS174 is useful for applications where the true output only is required and the Clock and Master Reset are common to all storage elements. TRUTH TABLE Inputs (t = n, MR = H) Outputs (t = n+1) Note 1 D Q H H L L Note 1: t = n + 1 indicates conditions after next clock. DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter Min Typ Max Unit Test Conditions VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for All Inputs VIL Input LOW Voltage 0.8 V Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage – 0.65 – 1.5 V VCC = MIN, IIN = – 18 mA VOH Output HIGH Voltage 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VO Output LOW Voltage 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN, VIN =VIL or VIH VOL Output LOW Voltage 0.35 0.5 V IOL = 8.0 mA VIN = VIL or VIH per Truth Table I Input HIGH Current 20 µA VCC = MAX, VIN = 2.7 V IIH Input HIGH Current 0.1 mA VCC = MAX, VIN = 7.0 V IIL Input LOW Current – 0.4 mA VCC = MAX, VIN = 0.4 V IOS Short Circuit Current (Note 1) –20 – 100 mA VCC = MAX ICC Power Supply Current 26 mA VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. |
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