74LS145 DIP BCD to Decimal Decoder/Driver
The 74LS145 is a high speed TTL integrated circuit designed to decode a four bit Binary Coded Decimal input into one of ten mutually exclusive outputs. This device features high performance open collector outputs that are specifically rated for a 15V breakdown voltage. This makes the IC ideal for directly driving indicators, relays, or other loads that operate at higher voltage levels than standard TTL logic.
When the input exceeds the decimal range of zero through nine, all outputs remain in the high impedance off state, providing an automatic blanking function for invalid BCD states. This decoder is widely used in numerical displays and control systems where efficient interfacing between logic levels and power loads is required. The low power Schottky technology ensures that the device maintains fast switching speeds while minimizing power consumption in complex digital circuits.
KEY FEATURES
- 4-line BCD to 10-line decimal decoding
- High voltage open collector outputs rated for 15V
- Full decoding of all 10 decimal output states
- Automatic blanking for invalid BCD input codes
- Low power Schottky design for high speed performance
- Standard 16 pin dual in line package
SPECIFICATIONS
- Supply Voltage 4.75V to 5.25V
- Operating Temperature 0 to 70 Celsius
- Logic Type TTL Low Power Schottky
- Output Breakdown Voltage 15V
- Low Level Output Current 80mA
- Typical Power Dissipation 35mW
- Input Voltage High 2.0V Minimum
INTERFACES
- A BCD input bit 0 least significant
- B BCD input bit 1
- C BCD input bit 2
- D BCD input bit 3 most significant
- 0 Decimal output 0 active low
- 1 Decimal output 1 active low
- 2 Decimal output 2 active low
- 3 Decimal output 3 active low
- 4 Decimal output 4 active low
- 5 Decimal output 5 active low
- 6 Decimal output 6 active low
- 7 Decimal output 7 active low
- 8 Decimal output 8 active low
- 9 Decimal output 9 active low
- VCC Positive supply voltage
- GND Ground reference
