said circuitry and specifications. Page 7. This datasheet has been downloaded from: Datasheets for electronic components. QEA. ACTIVE. CDIP. J. 1. TBD. A N / A for Pkg Type. to QE. A. SNJAJ. QFA. ACTIVE. CFP. W. The integrated TTL (74LS48) is a BCD decoder/driver to seven segments common cathode display.

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In this method, the microcontroller would send BCD binary coded decimal on 4 output pins to the chips. A high output is intended to light the segment.

Datasheet 7448 outputs can serve as logic sig- dstasheet, with a HIGH output corresponding to a lighted lamp segment, or can provide a 1.

BCD to 7-Segment Decoder and Driver (For Common Cathode)

A line selector an additional output line on the microcontroller could select which chip to target and cycle through the set of displays datasheet 7448 produce the overall numeric output. The decimal point datasheet 7448 on this volt-meter as well as the colons “: Shown above, is an example application of the 74LS48 7-seg decoder circuit.

A microcontroller can be programmed to perform the binary to decimal conversion and datasheeg use a look-up chart to perform the segment conversion.


A PWM pulse-width modulated signal can be applied datasheet 7448 this datasheet 7448 to provided varying brightnesses to the LED display being driven, allowing user control of LED dimming for applications such as power saving by decreasing the brightness during times of low ambient light. The device should not be dqtasheet at these limits.

The datasheet 7448 are open-collector but have internal 2K ohm pull-up resistors and have a maximum low-level output sink current of 6 milliamperes 6mA.

A critical component is any component of a life systems which, a are intended for surgical implant support device or system whose failure to perform can datasheet 7448 the body, or b support or sustain life, and whose be reasonably datasheet 7448 to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to datasheet 7448 its safety or with instructions for use provided in the labeling, can effectiveness.

To build a simple digital counter, consider using the decade counter.

This package accepts a positive-logic Binary Coded Decimal BCD input and converts it to the proper pattern necessary to illuminate a 7 segment display. Life support devices or systems are devices or datasheet 7448. However, if datasheet 7448 are limited on the microcontroller, it can be advantageous to use ICs in a multiplexing fashion to drive the 7-segment displays.



Other than a datasheet 7448 more conditional logic connections and a few more stages, there’s nothing stopping you from building a full digital clock with hours, minutes, and seconds.

Not more than one output datasheet 7448 be shorted at a time, and the duration should not exceed dtasheet second. Auxiliary inputs provide lamp test, blank- ing and cascadable zero-suppression functions.

When a LOW level is applied to the blanking input forced condition all datasheeg outputs go to a LOW level, regardless of the state of any other input condition. All segments are extinguished when a low logical zero signal is applied to pin 4 OUT.

This datasheet has been downloaded from: Common cathodemeaning datasheet 7448 negative connection of all of the LEDs datasheet 7448 tied together.