Part Number : 74LS49, SN74LS49, HD74LS49
Function : BCD-TO-7-Segment Decoder / Driver
Package : DIP 14 Pin type
Manufactures : TI ( Motorola ) , Hitachi
The 74LS49 features active-high outputs for driving lamp buffer. This circuit incorporates a direct blanking input. Segment identification and resultant displays are shown below. Display patterns for BCD input counts above 9 are unique symbols to authenticate input conditions. It contains an over-riding blanking input ( BI ) which can be used to control the lamp intensity by pulsing or to inhibit the output. Inputs and outputs are entirely compatible for use with TTL or DTL logic outputs.
1. Open-Collector Outputs
2. Blanking Input