74LS56 50-to-1 Frequency Divider IC – Datasheet.

74LS56 is a Dual 4 -50-to-1 Frequency Divider IC belonging to the 74XXYY IC Series. The 74LS56 frequency divider consists of three separate counters A, B & C on a single monolithic substrate IC. The ‘A’ & B counters Divide by 5 to 1 in the LS56 while the ‘C’ Counter divides by 2 to 1. The LS56b IC features a clear pin which is common to all three counters A, B & C. When the clear pin is low, the counters are enabled. When the clear pin is set to high, the counters are disabled and their outputs are set to low.

What is a Frequency Divider?

A Frequency Divider is a circuit that divides a given frequency by a factor of n, where n is an integer. Based on the application, Frequency Dividers can be designed for both Analog and Digital domains. Analog Frequency Dividers are used for very high frequency application but are very rarely used. They are further classified into Regenerative Dividers, Parametric Dividers and Harmonic Injection Dividers.

74LS56 Key Features & Specifications

• Supply Voltage 5V
• VIH – High-level input Voltage 2V
• VIL – Low-level input Voltage 0.7V
• Maximum current allowed to draw through each gate output: 8mA
• IOL (Max): 16mA
• IOH (Max): -1mA
• Clock frequency 15MHz
• TTL outputs
• Low power consumption

74LS56 Pinout

Pin Name	Pin No.	Description
CLK B	1	Clock input B
Vcc	2	Chip Supply Voltage
Qa	3	Chip Output A
GND	4	Ground
CLK A	5	Clock input A
CLR	6	Clear pin
Qb	7	Chip Output b
Qc	8	Chip Output c

Applications

Frequency Divider Circuits or Frequency Dividers are an integral part of many communication and audio based systems like:

• Frequency Synthesizers
• Audio Equipment
• Radar and Satellite Communication
• Military Equipment
• RF Devices

74LS56 Datasheet

You can download the 74LS56 frequency divider IC Datasheet from the link given below:

See Also: 74LS48 BCD-to-7 Segment Decoder – Datasheet | 74LS32 Quad 2 – Input OR Gate IC – Datasheet | 7407 Hex Buffer IC