7447 IC BCD to 7-Segment Decoders/Drivers Common Anode

السعر الأصلي هو: 25.00 EGP.السعر الحالي هو: 18.00 EGP.

7447 BCD to 7 Segment Decoder/Driver

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7447 IC BCD to 7-Segment Decoders/Drivers Common Anode

7447  BCD to 7-Segment Decoder/Driver Datasheet

Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions. All of the circuits incorporate automatic leading and/or trailing-edge, zero-blanking control (RBI and RBO). Lamp test (LT) of these devices may be performed at any time when the BI/RBO node is at a high logic level. All types contain an overriding blanking input (BI) which can be used to control the lamp intensity (by pulsing) or to inhibit the outputs.

Features
  • All circuit types feature lamp intensity modulation capability
  • Open-collector outputs drive indicators directly
  • Lamp-test provision
  • Leading/trailing zero suppression
Pin Layout
TTL 7447 Pin Layout
Pin Description
Pin NumberDescription
1BCD B Input
2BCD C Input
3Lamp Test
4RB Output
5RB Input
6BCD D Input
7BCD A Input
8Ground
97-Segment e Output
107-Segment d Output
117-Segment c Output
127-Segment b Output
137-Segment a Output
147-Segment g Output
157-Segment f Output
16Vcc – Positive Supply
Dimensional Drawing
DIP16 IC Dimensional Drawing
Technical Data

Absolute Maximum Ratings

Supply Voltage7V
Input Voltage5.5V
Operating Free Air Temperature0°C to 70°C
Storage Temperature Range-65°C to 150°C

Recommended Operating Conditions

SymbolParameterMinTypMaxUnits
VccSupply Votage4.7555.25V
VihHIGH Level Input Voltage2V
VilLOW Level Input Voltage0.8V
IohHIGH Level Output Current-0.4mA
IolLOW Level Output Current16mA
TaFree Air Operating Temperature070°C

Electrical Characteristics

SymbolParameterConditionsMinTypMaxUnits
ViInput Clamp VoltageVcc=Min Ii=-12mA-1.5V
VohHIGH Level Output VoltageVcc=Min Ioh=MAX Vil=MAX2.43.4V
VolLOW Level Output VoltageVcc=Min Iol=MAX Vih=MAX0.20.4V
IiInput Current@MAX Input VoltageVcc=Max Vi=5.5V1mA
IihHIGH Level Input CurrentVcc=Max Vi=2.4V40µA
IilLOW Level Input CurrentVcc=Max Vi=0.4V-1.6mA
IosShort Circuit Output CurrentVcc=Max-18-55mA
IcchSupply Current with Outputs HIGHVcc=Max48mA
IcclSupply Current with Outputs LOWVcc=Max1222mA

Switching Characteristics at Vcc=5V,Ta=25°C

SymbolParameterConditionsMinTypMaxUnits
tplhPropagation Delay Time LOW-to-HIGH Level OutputCl=15pF Rl=400R22nS
tphlPropagation Delay Time HIGH-to-LOW Level OutputCl=15pF Rl=400R15nS

14 Days Warranty

This item is covered with a standard warranty of 14 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Micro Ohm customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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