SN74LS47N. SN74LS47NSR. ACTIVE. SO. NS. Green (RoHS. & no Sb /Br). CU NIPDAU. LevelC-UNLIM. 0 to 74LS SNJAJ. ACTIVE. 74LS47 component details, pinout & Datasheet. 74LS47 is a BCD to 7-segment decoder/driver IC & It accepts a binary coded decimal as input and converts it. Part Number: 74LS47, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor.

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May 11, 5, 1, Finally, the LE latch enable terminal pin 5 enables the IC to give either direct or latched decoding operation. This article will provide a brief overview of the 74ld47 tools available to you. Figures 6, 7and 8 show how to modify the above circuit to drive LED common-anode displays, gas discharge displays, and low-brightness fluorescent displays, respectively.

Driving a fluorescent readout with 74ks47 B.

Posted by mmt in forum: Note in the cases of Figures 6 and 7 that an NPN buffer transistor must be interposed between each output drive segment and the input segment of the display. Quote of the day. The B has four input control terminals, and three auxiliary output terminals.

74LS47 Datasheet(PDF) – Fairchild Semiconductor

Method of modifying the Figure 17 circuit 74os47 give automatic leading-zero suppression. Search the history of over billion web pages on the Internet. No doubt that this is a resurrection!

A decoder is a combinatorial circuit with NO memory elements. Feb 28, 2, Way of using the B to drive a seven-segment LCD.


Each segemnt of the display has associated with it a Boolean equation that determines weather the segment is on or off. Figure 4 shows the functional diagram and pin notations of the device, which can use any power source in the 5V to 15V range. This feature enables the IC to act as a universal unit that can drive common-cathode or common-anode LED or liquid-crystal seven-segment displays with equal ease, as shown in Figures 10 to Driving a low-brightness fluorescent 74le When the not-LATCH terminal is pulled low, the BCD input signals that are present at the moment of transition are datadheet into memory and fed in decoded form to the seven-segment outputs until datasheeh 74ld47 pin returns to the high state.

Posted by leonheard in forum: Your name or email address: No better way datazheet learn!

They have integral ripple-blanking facilities, 7ls47 do not incorporate data latches. The LT daasheet drives all 74lw47 outputs on when the terminal is driven to logic 0 with the RBO terminal open or at logic 1.

Do you already have an account? Need to brush up on your electronics principles?

74ls47 (BCD to 7-Segment Decoder) Datasheet

Figure 1 shows the functional diagrams and pin designations of these devices, each of which is housed in a pin DIL package. Here is the important point. Posted by darasheet Electronics in forum: Feb 9, 6. No, create an account now. Dec 6, 8.

74LS47 datasheet, 74LS47 datasheets, manuals for 74LS47 electornic semiconductor part

The not-BL pin 4 terminal is also normally tied high, datsaheet blanks turns off all seven 47ls47 when 74l47 low. Indicator segments requiring up to 24 mA of current may be driven directly from the SN74LS47 high performance output transistors.


Feb 8, 1. If trailing-zero suppression is required, the direction of ripple-blanking feedback must be reversed with the RBI terminal of the LSD grounded and its RBO terminal wired to the 74ls terminal of the next least-significant 74ld47, and so on. A special two-part feature on how to use seven-segment alphanumeric displays. Figure 11 shows the basic way of using the B to drive a seven-segment LCD, and Figures 12 and 13 show it used to drive other types of seven-segment displays.

Learning Electronics Need to brush up on your electronics principles? The 74LS47 has active-low outputs designed for driving a common-anode LED display via external current-limiting resistors Rxas shown in Figure 2.

Full text of ” IC Datasheet: If cascaded B ICs are required to give automatic leading-zero suppression, the basic Figure 17 circuit must be modified as shown in Figure 18 to provide ripple-blanking operation. In Figure 12Rx sets the segment current of the display and Ry sets the base current of the transistor 10mA maximum. The opening episode of this special feature explained the basic operating and usage principles of seven-segment alphanumeric displays.

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