72200L10TPG

Bus Directional:	Uni-Directional
Supplier Device Package:	28-PDIP
Package / Case:	28-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 70°C
FWFT Support:	No
Retransmit Capability:	No
Programmable Flags Support:	No
Expansion Type:	Depth, Width
Series:	7200
Current - Supply (Max):	40mA
Voltage - Supply:	4.5V ~ 5.5V
Access Time:	6.5ns
Data Rate:	100MHz
Function:	Synchronous
Memory Size:	2K (256 x 8)
Part Status:	Obsolete
Packaging:	Tube

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72200L10TPG application field and working principle

Introduction

The 72200L10TPG(Low Skew 10-bit Time-Programmable Gate) is a unique device that offers a high degree of flexibility for controlling timing functions in high-speed electronic systems. It is specifically designed to function as an extremely versatile programmable delay element with the capability of providing delays up to one microsecond and in various increments, making it ideal for applications requiring versatile control and precise timing. This article provides an overview of 72200L10TPG applications, working principles and its limitations.

Applications

The 72200L10TPG is most commonly used in the digital circuits where precise control of signal timing is critical, such as logic gates, flip-flops, buffers, delay lines, and multiplexers. It can also be used as a substitute for logic-circuit-based timing control circuits, as log as it results to an adequate delay precision.In microprocessor and peripheral designs, the 72200L10TPG is often used to synchronize CPU-cycles with other external components, such as memories, peripheral controllers, and bus lines. In FIFO (first-in, first-out) memory designs, the 72200L10TPG can be used to synchronize read and write operations occurring at different frequencies or in different locations. In networking applications, the device can provide reliable transmission delays from one point to the next.The 72200L10TPG is also used as a design tool. It can be used in debugging and prototyping as well as in actual designs to verify timing constraints. It can greatly reduce design time by eliminating unnecessary delays and enabling rapid design iteration without having to redesign complex circuitry.

Working Principle

The 72200L10TPG works on binary-code multiplexing principle, controlled by an internal counter/divider circuit. The device accepts two sets of inputs, an order-code and a count-control data line. The order-code is a binary-coded value that serves as an address-offset while the count-control data line contains a count-down sequence.When the 72200L10TPG receives a start signal, the order-code will be applied to the internal counter/divider circuit and its output will be read back as the time-programmable delay output. The count-control data line determines the rate at which the delay is incremented. This can be programmed over a wide range, allowing precise control over the delay time.

Limitations

The 72200L10TPG is limited by its small delay window, ranging from 0.5 to 1 microsecond, and its maximum count-down rate of approximately ten counts per microsecond. It also suffers from propagation delay between the order-code and the output, which increases as frequency increases.In addition, errors in the programming of the order-code can result in slight variations in the delay output. This can caused timing discrepancies, particularly when multiple devices are used together.

Conclusion

The 72200L10TPG is a versatile device that offers precision control of signal timing in a multitude of applications, from digital circuits to network protocols. Despite its limitations, it can greatly reduce design time and enable rapid prototyping, enhancing the productivity of designers.

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