Timers

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. 

National Semiconductor Corp - MM5456N - IC, Timer.

Digital alarm clock.

Monolithic MOS Integrated Circuit.

Case: 22 Dip.

New.

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

ZILOG - Z8430APS -IC, Timers.

NMOS/CMOS Counter timer circuit.

Double marked Z80CTC.

Case: 28 Dip,

Note: Socket Pulls/Used.

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.

National Semiconductor Corp - LM555H  IC, timer.

Package: TO-99/8 Metal can.

New Old Stock

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.

ST Microelectronics - NE556N IC, timer.

Dual 555.

Package: 14 Dip.

New. 

Rockwell - R6532P IC, Timer.

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

Package: 40 Dip.

Socket Pulls. Used/Removed from Equipment.

Note: Double marked R6532-11

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

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

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.

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

Sanyo - LM8560  IC, Timer.

Single–Chip ED MOS LSI

LED Direct Drive by Time–Sharing (Duplex)
Wide Operating Voltage Range
Alarm on a 24–Hour Basis
Two Selections of Time Format: AM/PM 12–Hour Basis & 24–Hour Basis
On–Chip CR Oscillator for Battery Backup
50Hz or 60Hz Reference Frequency
Automatic Advance Capable: “Hours”, “Minutes”
Sleep Timer: Max. 59 Minutes or 1Hour, 59 Minutes
Repeatedly Usable Snooze
Power Failure Indicator
900Hz Output for Alarm Tone

Applications: Digital Alarm Clock.

Case: 28 Dip.

Alternates: ECG2062, NTE2062

Genuine Sanyo - New Old Stock

Additional Information: http://pdf.datasheetcatalog.com/datasheet/sanyo/LM8560B.pdf

Rockwell - R6532-15 IC, Timer.

RAM-I/O-Interval Timer (RIOT).

128B RAM

Package: 40 DIP.

New.

Additional Data: http://www.datasheetcatalog.com/datasheets_pdf/R/6/5/3/R6532.shtml

Note: Double marked C010750-12.

Applications: Atari 2600, Gottlieb Pinball Machines, Atari 810,1050 Disc Drives, 8050/8250/8250lp Commodore Pet disk drives, Atari 850 interface.

Philips - 7555ID - IC, Timer.

The ICM7555 and ICM7556 are CMOS RC timers providing significantly improved performance over the standard SE/NE555/6 and 355 timers.

Status: Discontinued

Type: 555 Type, Timer/Oscillator (Single)

Frequency: 500kHz

Voltage – Supply: 3V ~ 16V

Current – Supply: 180 µA

Operating Temperature: -40°C ~ 85°C

Package / Case: 8-SOIC (0.154", 3.90mm Width)

Supplier Device Package: 8-SO

Mounting Type: Surface Mount

Case: 8 SMD.

National Semiconductor Corp - LM556CN - IC, timer.

Dual 555.

Package: 14 Dip.

National Semiconductor Corp - LM556CN - IC, Timer.

Dual 555.

Genuine National Semiconductor - New Old Stock

Package: 14 Dip.

National Semiconductor Corp - LM555CN IC, timer.

Timing in microseconds through hours.

Package: 8 Dip.

Note: Direct replacement for SE555/NE555.

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 

Note: Used/Removed from equipment.

MOSTEK - MK3882N - Microprocessor Peripheral Timer - Counter Timer Circuit

Double marked Z80-CTC

New

28-Dip 

MOSTEK - MK3882N - Microprocessor Peripheral Timer - Counter Timer Circuit

Double marked Z80-CTC

Used / Clean Pulls

28-dip.