Overview
The MC14511B BCD-to-seven segment latch/decoder/driver, produced by onsemi, is a versatile integrated circuit designed to handle multiple functions in a single monolithic structure. It combines a 4-bit storage latch, an 8421 BCD-to-seven segment decoder, and output drive capability. The device is constructed with complementary MOS (CMOS) enhancement mode devices and NPN bipolar output drivers, making it suitable for a wide range of display applications.
The MC14511B can be used with various types of display readouts, including seven-segment light-emitting diodes (LED), incandescent, fluorescent, gas discharge, or liquid crystal displays (LCD), either directly or indirectly. It features inputs for lamp test (LT), blanking (BI), and latch enable (LE), which allow for testing the display, controlling the brightness, and storing BCD codes respectively.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage Range (VDD) | -0.5 to +18.0 | V |
| Input Voltage Range (Vin) | -0.5 to VDD + 0.5 | V |
| Operating Temperature Range (TA) | -55 to +125 | °C |
| Storage Temperature Range (Tstg) | -65 to +150 | °C |
| Maximum Output Drive Current (IOHmax) | 25 | mA |
| Power Dissipation per Package (PD) | 500 | mW |
| Chip Complexity | 216 FETs or 54 Equivalent Gates | |
| Supply Voltage Range | 3.0 V to 18 V | V |
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
- Capable of Driving Two Low-power TTL Loads, One Low-power Schottky TTL Load, or Two HTL Loads
- Triple Diode Protection on all Inputs
- Pb-Free and RoHS Compliant
Applications
The MC14511B is widely used in various display driver applications, including:
- Instrument display drivers (e.g., counters, DVMs)
- Computer/calculator display drivers
- Cockpit display drivers
- Clock, watch, and timer applications
Q & A
- What is the primary function of the MC14511B?
The MC14511B functions as a BCD-to-seven segment latch/decoder/driver, combining a 4-bit storage latch, an 8421 BCD-to-seven segment decoder, and output drive capability.
- What types of displays can the MC14511B drive?
The MC14511B can drive seven-segment light-emitting diodes (LED), incandescent, fluorescent, gas discharge, or liquid crystal displays (LCD).
- What is the supply voltage range for the MC14511B?
The supply voltage range for the MC14511B is 3.0 V to 18 V.
- What is the maximum output drive current of the MC14511B?
The maximum output drive current of the MC14511B is 25 mA.
- Does the MC14511B have any protection features?
Yes, the MC14511B includes triple diode protection on all inputs to protect against high static voltages or electric fields.
- What are the operating and storage temperature ranges for the MC14511B?
The operating temperature range is -55°C to +125°C, and the storage temperature range is -65°C to +150°C.
- Is the MC14511B Pb-Free and RoHS Compliant?
Yes, the MC14511B is Pb-Free and RoHS Compliant.
- What are some common applications of the MC14511B?
Common applications include instrument display drivers, computer/calculator display drivers, cockpit display drivers, and various clock, watch, and timer uses.
- How does the MC14511B handle lamp intensity modulation?
The MC14511B provides lamp intensity modulation capability through its blanking input and lamp test provision.
- Can the MC14511B perform time-sharing (multiplexing)?
Yes, the MC14511B has a time share (multiplexing) facility.
