DM74123 FAIRCHILD | Alldatasheet

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Technical content

Features

■ DC triggered from active-HIGH transition or active-LOW transition inputs ■ Retriggerable to 100% duty cycle ■ Direct reset terminates output pulse ■ Compensated for VCC and temperature variations ■ DTL, TTL compatible ■ Input clamp diodes Ordering Code: Connection Diagram Triggering Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Functional Description The basic output pulse width is determined by selection of an external resistor (RX) and capacitor (CX). Once trig- gered, the basic pulse width may be extended by retrigger- ing the gated active-LOW transition or active-HIGH transition inputs or be reduced by use of the active-LOW transition clear input. Retriggering to 100% duty cycle is possible by application of an input pulse train whose cycle time is shorter than the output cycle time such that a con- tinuous “HIGH” logic state is maintained at the “Q” output. Order Number Package Number Package Description DM74123N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Inputs ResponseAB C L R X X L No Trigger /c16 L X No Trigger /c16 H H Trigger H /c17 X No Trigger L /c17 H Trigger LH /c17 Trigger

3 www.fairchildsemi.com DM74123 Absolute Maximum Ratings(Note 1) Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions Note 2: TA = 25°C and VCC = 5V.

Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted) Note 3: All typicals are at VCC = 5V, TA = 25°C. Note 4: Not more than one output should be shorted at a time. Note 5: Quiescent ICC is measured (after clearing) with 2.4V applied to all clear and A inputs, B inputs grounded, all outputs OPEN, CEXT = 0.02 µF, and REXT = 25 KΩ . Note 6: ICC is measured in the triggered state with 2.4V applied to all clear and B inputs, A inputs grounded, all outputs OPEN, CEXT = 0.02 µF, and REXT = 25 kΩ . Supply Voltage 7V Input Voltage 5.5V Operating Free Air Temperature Range 0°C to +70°C Storage Temperature −65°C to +150°C Symbol Parameter Min Nom Max Units V CC Supply Voltage 4.75 5 5.25 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −0.8 mA IOL LOW Level Output Current 16 mA tW Pulse Width A or B HIGH 40 (Note 2) A or B LOW 40 ns Clear LOW 40 TWQ Minimum Width of A or B 65 ns(Min) Pulse at Q (Note 2) R EXT External Timing Resistor 5 50 k Ω C EXT External Timing Capacitance No Restriction µF C WIRE Wiring Capacitance 50 pFat REXT /CEXT Terminal (Note 2) TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units (Note 3) VI Input Clamp Voltage V CC = Min, II = −12 mA −1.5 V VOH HIGH Level V CC = Min, IOH = Max 2.5 3.4 V Output Voltage V IL = Max, VIH = Min VOL LOW Level V CC = Min, IOL = Max 0.2 0.4 V Output Voltage V IH = Min, VIL = Max II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 mA IIH HIGH Level V CC = Max Data 40 µA Input Current V I = 2.4V Clear 80 IIL Low Level V CC = Max, VI = 0.4V Clear −3.2 mA Input Current Data −1.6 IOS Short Circuit Output Current V CC = Max (Note 4) −10 −40 mA ICC Supply Current V CC = Max (Note 5)(Note 6) 46 66 mA

www.fairchildsemi.com 4 DM74123 Switching Characteristics at VCC = 5V and TA = 25°C Note 7: C ECT = 1000 pF, REXT = 10 kΩ Symbol Parameter C L = 15 pF, RL = 400Ω UnitsFrom (Input) C EXT = 1000 pF, REXT = 10 KΩ To (Output) Min Max tPLH Propagation Delay Time A to Q 33 ns LOW-to-HIGH Level Output tPLH Propagation Delay Time B to Q 28 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time A to Q 40 ns HIGH-to-LOW Level Output tPHL Propagation Delay Time B to Q 36 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Clear to Q 40 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Clear to Q 27 ns HIGH-to-LOW Level Output tW(out) Output Pulse Width A or B to Q 3.08 3.76 µs (Note 7)

5 www.fairchildsemi.com DM74123 Dual Retriggerable One-Shot with Clear and Complementary Outputs Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com