74LS248中文资料摩托罗拉数据手册PDF规格书

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.

LS247

• Open-Collector Outputs Drive Indicators Directly

• Lamp-Test Provision

• Leading/Trailing Zero Suppression

LS248

• Internal Pull-Ups Eliminate Need for External Resistors

• Lamp-Test Provision

• Leading/Trailing Zero Suppression

LS249

• Open-Collector Outputs

• Lamp-Test Provision

• Leading/Trailing Zero Suppression