器件名称: DM74LS247
功能描述: BCD to 7-Segment Decoder/Driver with Open-Collector Outputs
文件大小: 81.83KB 共4页
简 介:DM74LS247 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs
March 1998
DM74LS247 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs
General Description
The ’LS247 has active LOW open-collector outputs guaranteed to sink 24 mA. It has the same electrial characteristics and pin connections as the ’LS47. The only difference is that the ’LS247 will light the top bar (segment a) for numeral 6 and the bottom bar (segment d) for number 9. For detailed description and specifications please refer to the ’LS47 data sheet.
Connection Diagram
Dual-In-Line Package
Logic Symbol
DS009822-2
VCC = Pin 16 GND = Pin 8
DS009822-1
Order Number DM74LS247M or DM74LS247N See Package Number M16A or N16E Pin Names A0–A3 RBI LT BI/RBO a–g BCD Inputs Ripple Blanking Input (Active LOW) Lamp Test Input (Active LOW) Blanking Input (Active LOW) or Ripple Blanking Output (Active LOW) Segment Outputs (Active LOW) Description
1998 Fairchild Semiconductor Corporation
DS009822
www.fairchildsemi.com
Absolute Maximum Ratings (Note 1)
Supply Voltage Input Voltage 7V 7V
Operating Free Air Temperature Range Storage Temperature Range
0C to +70C 65C to +150C
Recommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current BI/RBO Low Level Output Current Free Air Operating Temperature 0 Parameter Min 4.75 2 0.8 50 24 70 Nom 5 Max 5.25 Units V V V A mA C
Note 1: The “Absolute Maximum Ratings” are th……
