40102

Technical Summary: HCC40102B Synchronous/Asynchronous Presettable Down Counter

Overview

The HCC40102B is a high-reliability CMOS presettable 8-bit synchronous/asynchronous down counter designed for medium-speed digital applications. Manufactured using silicon gate CMOS technology, this device offers low power consumption, high noise immunity, and compatibility with a wide range of supply voltages (3V to 20V). The counter features both synchronous and asynchronous preset capabilities, making it suitable for complex timing and counting applications where flexibility in initialization is required.

This component is part of the 4000B series CMOS logic family and complies with JEDEC standard No. 13A, ensuring interoperability with other B-series CMOS devices. The extended temperature range version (HCC40102B) makes it suitable for industrial and automotive applications where environmental conditions may vary significantly.

Key Features

• Flexible Counting Modes: Supports both synchronous and asynchronous preset operations
• Wide Operating Voltage Range: 3V to 20V DC supply voltage
• Medium-Speed Operation: Typical clock frequency of 3.6MHz at VDD = 10V
• Cascadable Design: Multiple units can be connected for higher bit-width applications
• Low Power Consumption: Quiescent current specified up to 20V for HCC devices
• Excellent Noise Immunity: Typical CMOS noise margin of 45% of VDD
• Multiple Parametric Ratings: Characterized for 5V, 10V, and 15V operation
• Low Input Current: Maximum input current of 100nA at 18V and 25°C
• Rigorous Testing: 100% tested for quiescent current compliance
• Temperature Range: Standard (-40°C to +85°C) and extended (-55°C to +125°C) versions available

Applications

The HCC40102B finds use in a wide variety of digital systems requiring precise counting or timing functions:

• Frequency dividers and programmable counters
• Industrial control systems
• Automotive electronics
• Digital clocks and timers
• Event counters in instrumentation
• Sequence generators
• Microcontroller-based system peripherals
• Communication equipment
• Military and aerospace electronics (extended temperature version)

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VDD): -0.5V to +22V
• Input Voltage (VIN): -0.5V to VDD + 0.5V
• Operating Temperature Range: -40°C to +85°C (standard), -55°C to +125°C (extended)
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage Range: 3V to 20V
• Input Voltage Range: 0V to VDD
• Clock Frequency: 0Hz to 3.6MHz (typical at 10V)

DC Characteristics (VDD = 10V, TA = 25°C)

• High-Level Input Voltage: 7V min (VDD = 10V)
• Low-Level Input Voltage: 3V max (VDD = 10V)
• High-Level Output Voltage: 9.95V min (VDD = 10V, IOH = -0.4mA)
• Low-Level Output Voltage: 0.05V max (VDD = 10V, IOL = 0.4mA)
• Input Leakage Current: 100nA max (VIN = 18V)
• Quiescent Current: 1μA max (VDD = 20V, all inputs at VDD or GND)

AC Characteristics (VDD = 10V, TA = 25°C)

• Maximum Clock Frequency: 3.6MHz typical
• Propagation Delay (Clock to Output): 300ns typical
• Transition Time: 150ns typical
• Setup Time (Preset to Clock): 200ns typical
• Hold Time (Clock to Preset): 100ns typical

Package Information

The HCC40102B is available in multiple package options to suit different application requirements:

Standard Package Options

• 16-pin DIP (Dual In-line Package):
  • Package Code: DIP16
  • Body Dimensions: 19.3mm x 6.35mm
  • Lead Pitch: 2.54mm
  • Lead Length: 3.3mm min
• 16-pin SOIC (Small Outline Integrated Circuit):
  • Package Code: SO16
  • Body Dimensions: 9.9mm x 3.9mm
  • Lead Pitch: 1.27mm
  • Lead Length: 0.5mm min
• 16-pin TSSOP (Thin Shrink Small Outline Package):
  • Package Code: TSSOP16
  • Body Dimensions: 5mm x 4.4mm
  • Lead Pitch: 0.65mm
  • Package Height: 1.2mm max

Thermal Characteristics

• DIP Package:
  • Thermal Resistance (Junction-to-Ambient): 80°C/W
  • Thermal Resistance (Junction-to-Case): 45°C/W
• SOIC Package:
  • Thermal Resistance (Junction-to-Ambient): 160°C/W
  • Thermal Resistance (Junction-to-Case): 75°C/W

Functional Description

The HCC40102B operates as an 8-bit presettable down counter with synchronous counting and asynchronous preset capabilities. The device features:

• Parallel Load (Preset) Capability: Allows the counter to be asynchronously preset to any value via the parallel data inputs (P0-P7)
• Synchronous Counting: The count decrements on the positive clock edge when enabled
• Cascading Output: Provides a carry-out signal for easy cascading of multiple counters
• Master Reset: Asynchronous reset input clears the counter to zero regardless of clock state

The counter advances on the positive-going edge of the clock signal when the enable input is active. The asynchronous parallel load feature allows immediate loading of a preset value independent of the clock state, while the synchronous operation ensures predictable counting behavior in complex digital systems.

Quality and Reliability

The HCC40102B is manufactured under strict quality control procedures and undergoes comprehensive testing to ensure reliability:

• 100% quiescent current testing
• Full functional testing at multiple voltage levels
• Temperature cycling and burn-in for extended temperature versions
• ESD protection exceeds 2000V (Human Body Model)
• Latch-up immunity exceeds 100mA