Timers

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  1. Motorola - MC1555U - IC, Timer. Single RC-Type Timer. 8 CDIP. Rare
    Special Price $14.98 Regular Price $18.50 As low as $8.98

    Motorola - MC1555U - IC, Timer.

    The MC1555/MC1455 monolithic timing circuit is a highly stable controller capable of producing accurate time delays, or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200 mA or drive MTTL circuits.

    Status: Discontinued

    Single RC-Type Timer.

    P(D) Max.(W) Power Dissipation=625m

    Nom. Supp (V)=15.

    Genuine Motorola - New Old Stock - Very Rare

    Package 8 CDIP, Case 693-02. 

     

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  2. National Semiconductor Corp - MM5456N - IC, Timer. Digital Alarm Clock. Monolithic MOS integrated circuit.
    Special Price $8.98 Regular Price $16.95 As low as $6.98
    IN STOCK - MORE THAN 1,000 READY TO SHIP!

    National Semiconductor Corp - MM5456N - IC, Timer.

    Digital alarm clock.

    Monolithic MOS Integrated Circuit.

    Clock IC, MOS, PDIP22
    Part #: MM5456N
    Part Category: Consumer ICs
    Manufacturer: (NSC) now Texas Instruments High-Performance Analog
    Description: Clock IC, MOS, PDIP22
    Status Discontinued
    JESD-30 Code R-PDIP-T22
    JESD-609 Code e0
    Number of Terminals 22
    Operating Temperature-Min -25.0  Cel
    Operating Temperature-Max 70.0  Cel
    Package Body Material PLASTIC/EPOXY
    Package Code DIP
    Package Equivalence Code DIP22,.4
    Package Shape RECTANGULAR
    Package Style IN-LINE
    Qualification Status Not Qualified
    Sub Category Clock ICs
    Surface Mount NO
    Technology MOS
    Temperature Grade OTHER
    Terminal Finish Tin/Lead (Sn/Pb)
    Terminal Form THROUGH-HOLE
    Terminal Pitch 2.54  mm
    Terminal Position DUAL

    Case: 22 Dip.

    New.

    Reference: https://html.datasheetq.com/pdf-html/518108/National-Semiconductor/1page/MM5456N.html?lang=en

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  3. ZILOG - Z8430APS - IC, timers. NMOS/CMOS Counter Timer Circuit.
    Special Price $3.98 Regular Price $6.00 As low as $2.98

    ZILOG - Z8430APS -IC, Timers.

    NMOS/CMOS Counter timer circuit.

    Double marked Z80CTC.

    Case: 28 Dip,

    Note: Socket Pulls/Used.

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  4. Advanced Micro Devices - P8253-5 - IC, timer. Programmable interval timer. Used.
    Special Price $7.98 Regular Price $9.50

    Advanced Micro Devices - P8253-5 IC, Timer.

    Status: Discontinued

    Programmable Interval Timer.

    Case: 24 Dip.

    Note: Clean Socket Pulls.

    Used/Removed from equipment.

    Rare and Difficult IC to find.

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  5. National Semiconductor Corp - LM555H A+ - IC, timer.
    Special Price $10.98 Regular Price $14.50
    IN STOCK - MORE THAN 100 READY TO SHIP!

    National Semiconductor Corp - LM555H  IC, timer.

    Package: TO-99/8 Metal can.

    New Old Stock

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  6. National Semiconductor Corp - LM555H - IC, Timer.
    Special Price $10.98 Regular Price $14.50

    National Semiconductor Corp - LM555H - IC, Timer.

    Number of Internal Timers: 1 Timer        

    Supply Voltage - Max: 18 V         

    Supply Voltage - Min: 4.5 V         

    Operating Temperature: - 55 C to + 125 C                             

    Mounting Style: Through Hole   

    Package / Case: TO-99   

    High Level Output Current: 200 mA         

    Length: 9.14 mm             

    Low Level Output Current: - 200 mA       

    Pd - Power Dissipation:  760 mW

    Note: National Semicoductor ICs where trnsferred to Texas Instruments.

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  7. Texas Instruments - SA555P - IC, timer. Single. Timing.
    $0.50
    IC, timer. Single. Timing in microseconds through hours. Package: 8 Dip. New. Learn More
  8. ST Microelectronics - NE556N - IC, timer. Dual 555. New.
    Special Price $0.79 Regular Price $1.00 As low as $0.29
    IN STOCK - MORE THAN 500 READY TO SHIP!

    ST Microelectronics - NE556N IC, timer.

    Dual 555.

    Package: 14 Dip.

    New. 

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  9. ST MICROELECTRONICS - HCF4536BE - DIP PROGRAMABLE TIMER
    Special Price $2.25 Regular Price $3.00
    PROGRAMABLE TIMER DIP SGS-THOMPSON Learn More
  10. Rockwell - R6532P - IC, timer. RAM-I/O-interval timer (RIOT). Used/Socket Pull.
    Special Price $12.98 Regular Price $24.50
    READY TO SHIP - ONLY 2 LEFT IN STOCK!

    Rockwell - R6532P IC, Timer.

    RAM-I/O-interval timer (RIOT).

    Package: 40 Dip.

    Socket Pulls. Used/Removed from Equipment.

    Note: Double marked R6532-11

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  11. RCA - LM555N - IC, timer. Single. Timing.
    $0.50

    IC, timer. Single. Timing in microseconds through hours. Package: 8 Dip. New.

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  12. National Semiconductor Corp - LM555H/883B - IC. Timer. Military.
    Special Price $24.98 Regular Price $28.50 As low as $16.98
    READY TO SHIP - ONLY 2 LEFT IN STOCK!

    National Semiconductor Corp - LM555H/883B IC. Timer.

    Package: New TO-99 Gold Leads.

    Some may have test dots.

    Operating Temperaure: -55 C to 125 C

    Storage Temperature: -65 C to 150 C

    Bulk Packed

    NSN: 5962-01-131-1230

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  13. National Semiconductor Corp - LM3905N - IC, Timer. Precision. 8 Dip.
    Special Price $9.98 Regular Price $12.00 As low as $7.98

    National Semiconductor Corp - LM3905N - IC, Timer. Precision.

    Timing periods from microseconds to hours.

    Operates from 4.5 to 40V supplies.

    Input protected from +/-40V.

    Timing period can be voltage controlled.

    TTL compatible input and output.

    Package: 8 Dip.

    Genuine National Semiconductor - New Old Stock

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  14. MAXIM - ICM7242MJA - IC. Fixed timer/counter. 8 Cdip.
    $5.00
    IC. Long range fixed timer/counter. Supply voltage: 18V. Current: 50mA. Dissipation: 200mW. Operating temperature: -20 to 85 Deg C. Package: 8 Cdip. Learn More
  15. DALLAS - DS1287 - IC. Real time clock. Used.
    $6.00
    IC. Real time clock. Package: 18 dip in a 24 dip outline. Note: Used/Removed from equipment. Guaranteed Learn More
  16. DALLAS Maxim - DS12887 - IC. Real Time Clock - CMOS Clock, 24 Pin Dip.
    Special Price $8.98 Regular Price $9.95

    DALLAS Maxim - DS12887 - IC. Real Time Clock - CMOS Clock, 24 Pin Dip.

    IC. Real Time Clock. Package: 18 dip in a 24 dip outline. Replaces DS1287 and used in personal computers to keep time, date, and CMOS settings while PC power is off.

    Review Dallas Maxim's on-line application notes for features, installation and compatibility instructions prior to purchasing the DS12887 Real Time Clock. 

    Status: Discontinued 

    Type: Clock/Calendar

    Features: Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output

    Memory Size: 114B

    Time Format: HH:MM:SS (12/24 hr)

    Date Format: YY-MM-DD-dd

    Interface: Parallel

    Voltage – Supply: 4.5V ~ 5.5V

    Voltage - Supply, Battery: 2.5V ~ 4V

    Current - Timekeeping (Max): 15mA @ 4.5V ~ 5.5V

    Operating Temperature: 0°C ~ 70°C

    Mounting Type: Through Hole

    Package / Case: 24-DIP Module (0.600", 15.24mm)

    Note: Genuine Dallas Maxim - Not an inexpensive Chinese Import Copy.

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  17. Dallas - Maxim Integrated - DS2417 - IC, timer. 1-Wire Time chip with Interrupt. SMD.

    Dallas - Maxim Integrated - DS2417 IC, Timer.

    The DS2417 1-Wire Time Chip with Interrupt offers a simple solution for storing and retrieving vital time information with minimal hardware. The DS2417 contains a unique lasered ROM and a real-time clock/calendar implemented as a binary counter. Only one pin is required for communication with the device. Utilizing a backup energy source, the data is nonvolatile and allows for stand-alone operation. The DS2417 features can be used to add functions such as calendar, time and date stamp, and logbook to any type of electronic device or embedded application that uses a microcontroller.

    1-Wire Time Chip with Interrupt.

    Package: 6 Pin TSOC SMD.

    Note: Dallas Semiconductor was aquired by Maxim Integrated

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  18. DALLAS - DS1302S - IC. Timekeeper, trickle charge.
    $3.00
    IC. Timekeeper, trickle charge. Package: 8 SOIC SMD. Learn More
  19. ZILOG - Z80CTC - Timer - Counter Timer Circuit
    Special Price $3.75 Regular Price $5.00
    Microprocessor Peripheral Timer - Counter Timer Circuit Double marked SL206 New 28-dip. Learn More
  20. ZILOG - Z84C9012VSC - I/O Controller, KIO Serial/Parallel Counter Timer
    Special Price $14.95 Regular Price $19.00
    I/O Controller, KIO Serial/Parallel Counter Timer NEW PLCC Learn More
  21. Unidentified MFG - KIA555P - 8-DIP NEW
    Special Price $0.79 Regular Price $1.00
  22. Unidentified MFG - 2N1374 - Transistor, PNP. P/N: 2N1374.
    $5.00
    Transistor, PNP. Max voltage: 15VEBO, 25VCBO. Max current: 200mA. Dissipation: 225mW. Package: TO-5 long leads. P/N: 2N1374. Note: Germanium. Manufacture logo "S". Learn More
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