HCF4538B DUAL MONOSTABLE MULTIVIBRATOR

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1 DUAL MONOSTABLE MULTIIBRATOR RETRIGGERABLE/RESETTABLE CAPABILITY TRIGGER AND RESET PROPAGATION DELAYS INDEPENDENT OF R X, C X TRIGGERING FROM LEADING OR TRAILING EDGE Q AND Q BUFFERED OUTPUT AAILABLE SEPARATE RESETS WIDE RANGE OF OUTPUT PULSE WIDTHS QUIESCENT CURRENT SPECIFIED UP TO 20 5, 10 AND 15 PARAMETRIC RATINGS SCHMITT TRIGGER INPUT ALLOWS UNLIMITED RISE AND FALL TIMES ON +TR AND -TR INPUTS INPUT LEAKAGE CURRENT I I = 100nA (MAX) AT DD = 18 T A = 25 C 100% TESTED FOR QUIESCENT CURRENT MEETS ALL REQUIREMENTS OF JEDEC JESD13B " STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEICES" DESCRIPTION The HCF4538B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. The HCF4538B dual precision monostable multivibrator provides stable retriggerable/ resettable one-shot operation for any fixed voltage DIP SOP ORDER CODES PACKAGE TUBE T & R DIP HCF4538BEY SOP HCF4538BM1 HCF4538M013TR timing application. An external resistor (R X ) and an external capacitor (C X ) control the timing and accuracy for the circuit. Adjustment of R X and C X provides a wide range of output pulse widths from the Q and Q terminals. The time delay from trigger input to output traition (trigger propagation delay) and the time delay from reset input to output traition (reset propagation delay) and the time delay from reset input to output traition (reset propagation delay) are independent of R X and C X. Precision control of output pulse width is achieved through linear CMOS techniques. Leading edge triggering (+TR) and trailing edge triggering (-TR) inputs are provided for triggering PIN CONNECTION 1/10

2 from either edge of an input pulse. An unused +TR input should be tied to SS. An unused -TR input should be tied to DD. A RESET (on low level) is provided for immediate termination of the output pulse or to prevent output pulses when power is turned on. An unused RESET input should be tied to DD. However, if an entire section of the HCF4538B is not used, its inputs must be tied to either DD or SS (see table 1). In normal operation the circuit triggers (extends the output IINPUT EQUIALENT CIRCUIT pulse one period) on the application of each new trigger pulse. For operation in the non-retiggerable mode, Q is connected to -TR when leading edge triggering (+TR) is used or Q is connected to +TR when trailing edge triggering (-TR) is used. The time period (T) for this multivibrator can be calculated by : T = R X C X. The min. value of external resistance, R X, is 4KΩ. The max. and min. values of external capacitance, C X, are 100 µf and 5nF, respectively. PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 4, 12 +TR 5, 11 -TR 3, 13 RESET 1, 15 C X 1, C X 2 2, 14 R X C X 1 R X C X 2 Trigger Inputs (Low to High, Edge-Triggered) Trigger Inputs (High to Low, Edge-Triggered) Direct Reset Inputs (Active Low) External Capacitor Connectio External Resistor/Capacitor Connectio 6, 10 Q1, Q2 Pulse Outputs 7, 9 Q1, Q2 Complementary Pulse Outputs 8 SS Negative Supply oltage 16 DD Positive Supply oltage Terminals 1, 8, 15 are electrically connected internally FUNCTIONAL DIAGRAM 2/10

3 LOGIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter alue Unit DD Supply oltage -0.5 to +22 I DC Input oltage -0.5 to DD I I DC Input Current ± 10 ma P D Power Dissipation per Package 200 mw Power Dissipation per Output Traistor 100 mw T op Operating Temperature -55 to +125 C T stg Storage Temperature -65 to +150 C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditio is not implied. All voltage values are referred to SS pin voltage. RECOMMENDED OPERATING CONDITIONS Symbol Parameter alue Unit DD Supply oltage 3 to 20 I Input oltage 0 to DD T op Operating Temperature -55 to 125 C 4/10

4 DC SPECIFICATIONS Test Condition alue Symbol Parameter I () O () I O (µa) DD () T A = 25 C -40 to 85 C -55 to 125 C Min. Typ. Max. Min. Max. Min. Max. Unit I L Quiescent Current 0/ / / / OH High Level Output 0/5 < oltage 0/10 < /15 < OL IH IL I OH I OL Low Level Output oltage High Level Input oltage Low Level Input oltage Output Drive Current Output Sink Current 5/0 < /0 < /0 < /4.5 < /9 < /13.5 < /0.5 < /1 < /1.5 < /5 2.5 < /5 4.6 < / < / < /5 0.4 < / < / < I I Input Leakage 0/18 Any Input 18 Current ±10-5 ±0.1 ±1 ±1 µa C I Input Capacitance Any Input pf The Noise Margin for both "1" and "0" level is: 1 min. with DD =5, 2 min. with DD =10, 2.5 min. with DD =15 µa ma ma 5/10

5 DYNAMIC ELECTRICAL CHARACTERISTICS (T amb = 25 C, C L = 50pF, R L = 200KΩ, t r = t f = 20 ) Symbol Parameter Test Condition alue (*) Unit DD () Min. Typ. Max. t TLH t THL Traition Time t PLH t PHL Propagation Delay Time TR or -TR to Q or Q t PLH t PHL t WH t WL t WT t WT t WT t W Propagation Delay Time Reset to Q or Q Minimum Input Pulse Width +TR, -TR or Reset Output Pulse Width - Q or Q (C X = µf, R X = 10KΩ (1) ) Output Pulse Width - Q or Q (C X = 0.1µF, R X = 100KΩ) Output Pulse Width - Q or Q (C X = 10µF, R X = 100KΩ) Pulse Width Match Between Circuits in Same Package : (100(T 1 - T 2 )/T 1 ) (C X = 0.1µF, R X = 100KΩ) (*) Typical temperature coefficient for all DD value is 0.3 %/ C. (1) Minimum R X value = 4KΩ, minimum C X value = 5000 pf R L = 1KΩ R L = 1KΩ ± 1 10 ± 1 15 ± 1 t rr Minimum Retrigger Time C IN Input Capacitance Any Input pf µs ms s % 6/10

6 Plastic DIP-16 (0.25) MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. a B b b D E e e F I L Z P001C 8/10