N82C54

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N82C54

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PROGRAMMABLE INTERVAL TIMER

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Specifications

Attribute Value
Supplier Rochester Electronics, LLC
Package Bulk
ProductStatus Active
Type Programmable Timer
Frequency 8MHz
Voltage-Supply 4.5V ~ 5.5V
Current-Supply 20 mA
OperatingTemperature -55°C ~ 125°C (TC)
Package/Case 24-CDIP
SupplierDevicePackage 24-CDIP

Overview

Description

The N82C54 is a programmable interval timer chip used in microcomputer systems for timing control applications. It is a variant of the Intel 8254 and is designed to handle timing operations with greater precision and flexibility. This chip contains three independent 16-bit counters, which can be used to generate accurate time delays, count events, or create complex waveforms.
Each counter in the N82C54 can operate in six different modes, including interrupt on terminal count, hardware retriggerable one-shot, rate generator, square wave generator, software triggered strobe, and hardware triggered strobe. These modes allow it to perform a variety of timing functions suited for different applications.
The N82C54 interacts with the CPU via a system bus, allowing it to be easily programmed and integrated into various systems. It is commonly used in embedded systems, industrial automation, and instrumentation for tasks such as generating clock signals, scheduling tasks, and managing periodic interrupts. Its versatility and reliability make it a vital component in time-sensitive operations.

Equivalent

The N82C54 chip is a programmable interval timer used in microprocessor systems. Equivalent products include the Intel 8254, which is essentially the same chip with slightly different naming. Other similar programmable interval timers include the AMD Am9513, Signetics 82C54, and the Harris/Intersil 82C54. These chips provide similar functionality, such as counting and generating timings for interfacing microprocessors. However, always check the datasheets for exact compatibility.

Features

The N82C54 is a programmable interval timer/counter device commonly used in microprocessor systems for timing applications. Here are its key features:
1. Three Independent 16-bit Counters: It includes three separate counters, each capable of handling 16-bit binary or BCD counting, providing flexibility in various timing applications.
2. Programmable Modes: The device offers six programmable counting modes that support operations such as event counting, frequency division, and pulse generation.
3. Binary and BCD Counting: Counters can be configured for either binary or BCD (Binary-Coded Decimal) counting, providing versatility for different application needs.
4. Interfacing: It is designed for easy interfacing with the CPU, typically requiring just a few control signals for operation.
5. Compatibility: The N82C54 is compatible with most microprocessor families, making it a popular choice in embedded systems.
6. Low-Power CMOS Technology: It utilizes CMOS technology, which ensures low power consumption while maintaining high performance.
7. Individual Counter Control: Each counter can be individually controlled and programmed, allowing for simultaneous timing tasks.
These features make the N82C54 suitable for applications like event counting, frequency measurement, and generating accurate time delays.

Pinout

The N82C54 is a programmable interval timer device that contains three independent 16-bit counters, each capable of handling clock input rates up to 10 MHz. It is commonly used in microprocessor systems for timing control applications.
The N82C54 is packaged in a 24-pin dual in-line package (DIP). Here's a brief summary of its pin functions:
1. VCC (1 pin) - Power supply pin.
2. GND (1 pin) - Ground pin.
3. D0-D7 (8 pins) - Data bus for communication with the microprocessor, allowing control and data exchange.
4. /RD (1 pin) - Read control signal, active low.
5. /WR (1 pin) - Write control signal, active low.
6. A0-A1 (2 pins) - Address lines to select registers or counters.
7. /CS (1 pin) - Chip select, active low, used to enable the device for reading or writing.
8. CLK0-CLK2 (3 pins) - Clock input for each of the three counters.
9. GATE0-GATE2 (3 pins) - Control inputs for the count enable/disable function for each counter.
10. OUT0-OUT2 (3 pins) - Counter outputs, which provide the timing pulses or waveforms.
This configuration provides versatile timing and counter functionalities, making the N82C54 suitable for various applications in embedded systems.

Manufacturer

The N82C54 is a programmable interval timer (PIT) that was manufactured by Intel. Intel Corporation is a leading American multinational technology company known primarily for designing and manufacturing semiconductor and computing products. It is one of the world's largest and highest-valued semiconductor chip makers, renowned for its microprocessors, integrated graphics processing units, and other related products. Intel plays a significant role in the technology industry, providing components for computer systems and influencing advancements in computing technology.

Application

The N82C54 is a programmable interval timer primarily used in microprocessor systems for precise timing control. Its applications include generating accurate time delays, producing clock signals, and managing event counting. It's often utilized in embedded systems for tasks such as scheduling and timekeeping. Additionally, it can be employed in applications like frequency measurement, pulse generation, and as a watchdog timer to monitor system operation. The N82C54 is valued for its versatility and reliability in industrial automation, instrumentation, and control systems, where precise timing is crucial.

Package

The N82C54 is a programmable interval timer (PIT) integrated circuit typically available in a dual in-line package (DIP) or a plastic leaded chip carrier (PLCC) package. These packages facilitate easy mounting on printed circuit boards (PCBs) for various timing and control applications in computing and embedded systems.

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