40192B - HCC40192B CMOS Presettable Up/Down Counter

Overview

The HCC40192B is a high-speed CMOS presettable up/down counter belonging to the "B" series of CMOS devices. This integrated circuit is designed for applications requiring bidirectional counting with synchronous presetting capabilities. Manufactured using advanced silicon gate CMOS technology, it offers low power consumption while maintaining high noise immunity and wide operating voltage range.

This device features a fully synchronous counting operation, with separate clock inputs for up and down counting directions. The parallel load capability allows the counter to be preset to any desired value, making it highly versatile for various counting applications in digital systems.

Key Features

• Synchronous up/down counting operation
• Separate clock inputs for up and down counting
• Asynchronous parallel load capability
• Carry and borrow outputs for cascading
• Fully static operation - DC to 10 MHz (typical)
• Wide supply voltage range: 3V to 18V
• Low power consumption: 100nW (typical) at 5V
• High noise immunity: 0.45 VDD (typical)
• Symmetric output drive capability
• Standardized symmetrical output characteristics
• Compatible with TTL and other CMOS logic families

Applications

The HCC40192B finds applications in various digital systems requiring counting functionality:

• Digital frequency counters
• Programmable dividers
• Industrial control systems
• Automated test equipment
• Event counters
• Time measurement systems
• Position control systems
• Digital clocks and timers
• Microprocessor-based systems
• Communication equipment

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VDD): -0.5V to +20V
• Input Voltage (VIN): -0.5V to VDD + 0.5V
• Storage Temperature Range: -65°C to +150°C
• Power Dissipation: 200 mW

Recommended Operating Conditions

• Supply Voltage Range: 3V to 18V
• Input Voltage Range: 0V to VDD
• Operating Temperature Range: -55°C to +125°C

DC Characteristics (VDD = 5V, TA = 25°C)

• High Level Input Voltage: 3.5V min
• Low Level Input Voltage: 1.5V max
• High Level Output Voltage: 4.95V min (IOUT = -0.4mA)
• Low Level Output Voltage: 0.05V max (IOUT = 0.4mA)
• Input Leakage Current: ±0.1μA max
• Quiescent Supply Current: 1μA max (VDD = 10V)

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

• Maximum Clock Frequency: 10 MHz typical
• Propagation Delay (Clock to Output): 200 ns typical
• Rise/Fall Time: 100 ns typical
• Set-Up Time (Data to Clock): 100 ns typical
• Hold Time (Clock to Data): 50 ns typical

Functional Description

The HCC40192B is a 4-bit synchronous up/down decade counter with asynchronous parallel load capability. The device features separate clock inputs for up (CPU) and down (CPD) counting. Counting occurs on the positive-going transition of the respective clock input.

The counter can be preset to any value by applying the desired binary number to the parallel data inputs (P0-P3) and taking the parallel load (PL) input low. This operation is asynchronous and independent of the clock inputs. The master reset (MR) input, when high, clears all flip-flops regardless of the state of other inputs.

The device provides carry (TCU) and borrow (TCD) outputs which can be used for cascading multiple counters. The carry output produces a low pulse equal in width to the CPU high time when the counter overflows from 9 to 0. Similarly, the borrow output produces a low pulse equal in width to the CPD high time when the counter underflows from 0 to 9.

Pin Configuration and Functionality

• P0-P3: Parallel data inputs for presetting the counter
• Q0-Q3: Counter outputs (Q0 is LSB, Q3 is MSB)
• CPU: Clock input for up counting
• CPD: Clock input for down counting
• PL: Parallel load input (active low)
• MR: Master reset input (active high)
• TCU: Carry output for up counting
• TCD: Borrow output for down counting
• VDD: Positive supply voltage
• VSS: Ground reference

Package Information

The HCC40192B is available in several package options:

• DIP-16: 16-pin Dual In-line Package (300 mil width)
• SOIC-16: 16-pin Small Outline Integrated Circuit (150 mil width)
• TSSOP-16: 16-pin Thin Shrink Small Outline Package (4.4mm body width)

Package Dimensions (DIP-16)

• Overall Length: 19.3 mm max
• Overall Width: 6.35 mm max
• Lead Pitch: 2.54 mm
• Lead Length: 3.3 mm min
• Body Thickness: 3.3 mm max

Design Considerations

When implementing the HCC40192B in a circuit design, consider the following:

• Unused inputs must be tied to VDD or VSS to prevent floating conditions
• Decoupling capacitors (0.1μF) should be placed close to the VDD pin
• Clock signals should have fast rise and fall times for reliable operation
• For cascaded operation, connect TCU of one stage to CPU of the next higher stage
• When operating near maximum frequency, minimize capacitive loading on outputs
• For TTL compatibility, use a pull-up resistor on outputs when driving TTL inputs

Reliability and Quality

The HCC40192B is manufactured with strict quality control measures:

• ESD protection exceeds 2000V (Human Body Model)
• Latch-up immunity exceeds 250mA
• 100% tested for quiescent current at 20V
• Burn-in available for high-reliability applications
• Industrial temperature range version available (-40°C to +85°C)