These BCD-to-decimal decoders consist of eight inverters and ten four-input NAND gates The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates Full decoding of input logic ensures that all outputs remain off for all invalid (10–15) input conditions Features Y Y Y Y Diode clamped inputs Also for applications as .
Y Y Y Y Diode clamped inputs Also for applications as 4-line-to-16-line decoders 3line-to-8-line decoders All outputs are high for invalid input conditions Alternate Military Aerospace device (54LS42) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package Function Table No 0 1 2 3 4 5 6 7 8 9 I N V A L I D BCD Inputs D L L L L L L L L H H H H H H H H C L L L L H H H H L L L L H H H H B L L H H L L H H L L H H L L H H A L H L H L H L H L H L H L H L H 0 L H H H H 1 H L H H H 2 Decimal Outputs 3 4 5 6 7 8 9 H H H H H.
The LS42 decoder accepts four active HIGH BCD inputs and provides ten mutually exclusive active LOW outputs, as shown by.
Unit: mm 19.20 20.32 Max 14 8 6.30 7.40 Max 1 2.39 Max 1.30 7 7.62 0.51 Min 2.54 Min 5.06 Max 2.54 ± 0.25 0.48 ± 0.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | 74LS40 |
Motorola |
DUAL 4-INPUT NAND BUFFER | |
2 | 74LS43 |
Raytheon |
4 Line to 10 Line Decoders | |
3 | 74LS466 |
ETC |
OCTAL BUFFERS | |
4 | 74LS47 |
Motorola |
BCD TO 7-SEGMENT DECODER/DRIVER | |
5 | 74LS47 |
ON Semiconductor |
BCD to 7-Segment Decoder/Driver | |
6 | 74LS47 |
ETC |
BCD-TO-SEVEN SEGMENT DECORDER/DRIVER | |
7 | 74LS47 |
Fairchild Semiconductor |
BCD to 7-Segment Decoder/Driver | |
8 | 74LS471 |
National Semiconductor |
2048-BIT TTL PROM | |
9 | 74LS48 |
Hitachi Semiconductor |
BCD-to-Seven-Segment Decoder Driver | |
10 | 74LS48 |
Motorola |
BCD TO 7-SEGMENT DECODER | |
11 | 74LS48 |
National Semiconductor |
BCD to 7-Segment Decoder | |
12 | 74LS49 |
Hitachi Semiconductor |
BCD-to-Seven Segment Decoder Driver |