MC14415 Quad Precision Timer/Driver DIP-16 (MC14415 IC)

The MC14415 is a specialized CMOS integrated circuit designed as a Quad Precision Timer and Driver. Housed in a 16-pin DIP package, it consists of four digital timers where the output pulse width is a precise function of the input clock frequency. Once the IC detects a proper input sequence, the corresponding output buffer is set (turned on); after exactly 100 clock pulses are counted, the buffer is reset (turned off).

Originally developed by Motorola, this IC was engineered specifically for high-speed line printers to provide critical timing for hammer drivers. However, its ability to generate high-accuracy pulse widths makes it suitable for various precision timing applications. The device combines the low power consumption of CMOS logic with the high-current driving capability of integrated NPN bipolar output drivers.

Key Features

• Four Precision Timers: Contains four independent digital time delay circuits.
• Clock Conditioning: Includes Schmitt Trigger clock conditioning for improved noise immunity.
• Bipolar Outputs: Integrated NPN bipolar drivers for direct load switching.
• Flexible Strobing: Supports both positive and negative edge strobing on the inputs.
• Inhibit Function: Features timing disable capability via an Inhibit output.
• CMOS Technology: Constructed with complementary MOS enhancement mode devices for low power.
• Precise Counting: Uses synchronous polynomial counters to ensure exact 100-clock pulse delays.

Specifications

• IC Type: Quad Precision Timer / Driver
• Supply Voltage (VDD): 3.0V to 18V
• Input Clock Frequency: Determines the output pulse width
• Delay Count: Fixed at 100 clock pulses
• Output Type: NPN Bipolar (Active High)
• Package Type: PDIP-16
• Mounting Type: Through-Hole
• Operating Temperature: -55 to +125 degrees Celsius

Interfaces

• Pin 1 (Input 1): Trigger Input for Timer 1
• Pin 2 (Input 2): Trigger Input for Timer 2
• Pin 3 (Input 3): Trigger Input for Timer 3
• Pin 4 (Input 4): Trigger Input for Timer 4
• Pin 5 (Inhibit): Global Inhibit Input (Disables Outputs)
• Pin 6 (Clock): Master Clock Input
• Pin 7 (Clock Out): Buffered Clock Output
• Pin 8 (VSS): Ground (0V)
• Pin 9 (NC): No Connection
• Pin 10 (Output 4): Timer 4 Driver Output
• Pin 11 (Output 3): Timer 3 Driver Output
• Pin 12 (Output 2): Timer 2 Driver Output
• Pin 13 (Output 1): Timer 1 Driver Output
• Pin 14 (NC): No Connection
• Pin 15 (NC): No Connection
• Pin 16 (VDD): Positive Power Supply