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Description
BCD to 7-Segment Decoder/Driver with Open-Collector Outputs
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The SN74LS47 are Low Power Schottky BCD to 7-Segment Decoder/ Drivers consisting of NAND gates, input buffers and seven AND-OR-INVERT gates. They offer active Low, high sink current outputs for driving indicators directly. Seven NAND gates and one driver are connected in pairs to make BCD data and its complement available to the seven decoding AND-OR-INVERT gates. The remaining NAND gate and three input buffers provide lamp test,blanking input / ripple-blanking output and ripple-blanking input.
The circuits accept 4-bit binary-coded-decimal (BCD) and, depending on the state of the auxiliary inputs,decodes this data to drive a 7-segment display indicator. The relative positive-1ogic output levels, as well as conditions required at the auxiliary inputs, are shown in the truth tables.Output configurations of the SN74LS47 are designed to withstand the relatively high voltages required for7-segment indicators.
These outputs will withstand 15 V with a maximum reverse current of 250μA.Indicator segments requiring up to 24 mA of current may be driven directly from the SN74LS47 high performance output transistors. Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions.
The SN74LS47 incorporates automatic leading and/ or trailing-edge zero-blanking control (RBI and RBO). Lamp test (LT) may be performed at any time which the BI/RBO node is a HIGH level. This device also contains an overriding blanking input (BI) which can be used to control the lamp intensity by varying the frequency and duty cycle of the Bl input signal or to inhibit the outputs.
● Lamp Intensity Modulation Capability (BI/RBO)
● Open Collector Outputs
● Lamp Test Provision
● Leading /Trailing Zero Suppression
● Input Clamp Diodes Limit High-Speed Termination Effects
Preview of the first 3 pages of the data sheet
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222 buyer reviews from India
Ana Parra
Length of registration:9 years
Great electronic components! Very accurate well-packed test run, 5 days to tabasco Mexico very fast.
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11/14/2022
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74LS47N
74LS47N has several brands around the world that may have alternate names for 74LS47N due to regional differences or acquisition. 74LS47N may also be known as the following names:
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Stock Status: 10000
Minimum: 5
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Unit Price:0.67056
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