Overview
The MC14511BDR2G is a BCD-to-seven segment latch/decoder/driver produced by onsemi. It is constructed with complementary MOS (CMOS) enhancement mode devices and NPN bipolar output drivers in a single monolithic structure. This circuit provides the functions of a 4-bit storage latch, an 8421 BCD-to-seven segment decoder, and an output drive capability. It includes features such as lamp test, blanking, and latch enable inputs, which are used to test the display, turn off or pulse modulate the brightness, and store a BCD code, respectively. The device can be used with various display types including seven-segment light-emitting diodes (LED), incandescent, fluorescent, gas discharge, or liquid crystal readouts.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage Range | −0.5 to +18.0 | V |
| Input Voltage Range, All Inputs | −0.5 to VDD + 0.5 | V |
| Maximum Output Drive Current (Source) per Output | 25 | mA |
| Operating Temperature Range | −55 to +125 | °C |
| Storage Temperature Range | −65 to +150 | °C |
| Power Dissipation, per Package | 500 | mW |
| Chip Complexity | 216 FETs or 54 Equivalent Gates | |
| Package Type | SOIC-16 |
Key Features
- Low Logic Circuit Power Dissipation
- High-Current Sourcing Outputs (Up to 25 mA)
- Latch Storage of Code
- Blanking Input
- Lamp Test Provision
- Readout Blanking on all Illegal Input Combinations
- Lamp Intensity Modulation Capability
- Time Share (Multiplexing) Facility
- Supply Voltage Range = 3.0 V to 18 V
- Capable of Driving Two Low-power TTL Loads, One Low-power Schottky TTL Load, or Two HTL Loads Over the Rated Temperature Range
- Triple Diode Protection on all Inputs
- Pb-Free and RoHS Compliant
Applications
The MC14511BDR2G is versatile and can be used in various applications, including:
- Instrument display drivers (e.g., counters, DVMs)
- Computer/calculator display drivers
- Cockpit display drivers
- Clock, watch, and timer uses
Q & A
- What is the primary function of the MC14511BDR2G?
The MC14511BDR2G functions as a 4-bit storage latch, an 8421 BCD-to-seven segment decoder, and an output drive capability in a single monolithic structure.
- What types of displays can the MC14511BDR2G drive?
The device can drive seven-segment light-emitting diodes (LED), incandescent, fluorescent, gas discharge, or liquid crystal readouts.
- What is the supply voltage range for the MC14511BDR2G?
The supply voltage range is from 3.0 V to 18 V.
- What is the maximum output drive current per output?
The maximum output drive current per output is 25 mA.
- What is the operating temperature range for the MC14511BDR2G?
The operating temperature range is from −55°C to +125°C.
- Does the MC14511BDR2G have any protection features?
Yes, it includes triple diode protection on all inputs and is Pb-Free and RoHS Compliant.
- What package types are available for the MC14511BDR2G?
The device is available in SOIC-16 packages.
- Can the MC14511BDR2G be used in automotive applications?
Yes, the NLV prefix version is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other demanding applications.
- How does the lamp test provision work on the MC14511BDR2G?
The lamp test provision allows for testing the display by activating the LT (lamp test) input, which helps in verifying the display functionality.
- What is the purpose of the blanking input on the MC14511BDR2G?
The blanking input (BI) allows for turning off or pulse modulating the brightness of the display.
