SN74LS249 Datasheet - Motorola

SN74LS249 BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS

BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS The SN54/74LS247 thru SN54/74LS249 are BCD-to-Seven-Segment Decoder/Drivers. The LS247 and LS248 are functionally and electrically identical to the LS47 and LS48 with the same pinout configuration. The LS249 is a 16-pin version of the 14-pin LS49 and includes full functional capability for lamp test and ripple blanking which was not available in the LS49. The composition of all characters, except the 6 and 9 are identical between the LS247, 248, 249 and the .

SN74LS249 Features

* MAX, VIN = 0.4 V VCC = MIN, VIH = 2.0 V, VIL = per Truth Table 54, 74 74 54, 74 0.25 0.35 0.25 0.4 0.5 0.4 V IIL mA Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (VCC = 5.0 V, TA = 25°C) Limits Symbol tPLH tPHL tPHL tPLH Param

SN74LS249_MotorolaInc.pdf