|Category||Interface and Interconnect|
|Datasheet||Download SN74LS247 datasheet
|Cross ref.||Similar parts: SN74LS137D, SN74LS137DR2, SN74LS138D, SN74LS138DR2, SN74LS139D, SN74LS139DR2, SN74LS145D, SN74LS145DR2, SN74LS155D, SN74LS155DR2|
The is a BCD-to-Seven-Segment Decoder/Drivers. The LS247 composes the and with the tails. The LS247 has active-low outputs for direct drive of indicators. The LS247 features a lamp test input and have full ripple-blanking input/output controls. An automatic leading and/or trailing-edge zero-blanking control (RBI and RBO) is incorporated and an overriding blanking input (BI) is contained which may be used to control the lamp intensity by pulsing or to inhibit the output's lamp test may be performed at any time when the BI/RBO node is at high level. Segment identification and resultant displays are shown below. Display pattern for BCD input counts above 9 are unique symbols to authenticate input conditions.
Open-Collector Outputs Drive Indicators Directly Lamp-Test Provision Leading/Trailing Zero Suppression
Symbol VCC TA IOH IOL VO(off) IO(on) Parameter Supply Voltage Operating Ambient Temperature Range Output Current High BI/RBO Output Current Low BI/RBO OffState Output Voltage ag OnState Output Current ag Min 4.75 0 Typ 5.0 25 Max Unit °C mA
Device SN74LS247D SN74LS247DR2 Package 16 Pin DIP SOIC16 Shipping 2000 Units/Box 38 Units/Rail 2500/Tape & ReelCIRCUIT FEATURES LAMP INTENSITY MODULATION CAPABILITY
DRIVER OUTPUTS TYPE SN74LS247 ACTIVE LEVEL low OUTPUT CONFIGURATION open-collector SINK CURRENT 24 mA MAX VOLTAGE 15 V TYPICAL POWER DISSIPATION 35 mW
(13) INPUT (7) A INPUT (1) B INPUT (2) C INPUT (6) D BI/RBO BLANKING (4) INPUT OR RIPPLEBLANKING OUTPUT LAMP TEST INPUT RBI (5) RIPPLEBLANKING INPUT (14) (12) OUTPUT aOUTPUT b OUTPUT c OUTPUT d OUTPUT e OUTPUT f OUTPUT g
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