Overview
The MC14042B Quad Transparent Latch, produced by onsemi, is a versatile integrated circuit constructed with MOS P-channel and N-channel enhancement mode devices in a single monolithic structure. This device features four independent latches, each with a separate data input, but all sharing a common clock. The clock polarity can be controlled, allowing data transfer during either the high or low clock level, depending on the state of the polarity input. This flexibility makes the MC14042B suitable for a wide range of digital logic applications.
Key Specifications
| Characteristic | Symbol | VDD (Vdc) | Min | Typ | Max |
|---|---|---|---|---|---|
| Supply Voltage Range | VDD | 3.0 to 18 | - | - | - |
| Output Voltage '0' Level | VOL | 5.0, 10, 15 | 0.05 | 0.05 | 0.05 |
| Output Voltage '1' Level | VOH | 5.0, 10, 15 | 4.95, 9.95, 14.95 | 4.95, 9.95, 14.95 | 4.95, 9.95, 14.95 |
| Propagation Delay Time, D to Q, Q | tPD | 5.0, 10, 15 | 50, 30, 25 | - | - |
| Output Rise and Fall Time | tTLH, tTHL | 5.0, 10, 15 | 100, 50, 40 | - | - |
| Operating Temperature Range | TA | -55 to 125 | - | - | - |
Key Features
- Buffered Data Inputs
- Common Clock for all four latches
- Clock Polarity Control: Data transfer during high or low clock level
- Q and Q Outputs for each latch
- Double Diode Input Protection
- Wide Supply Voltage Range: 3.0 Vdc to 18 Vdc
Applications
The MC14042B Quad Transparent Latch is suitable for various digital logic applications, including data storage and transfer in digital circuits, clocked logic systems, and any scenario where data needs to be latched and transferred based on a clock signal. It is particularly useful in systems requiring flexible clock polarity control.
Q & A
- What is the MC14042B Quad Transparent Latch? The MC14042B is an integrated circuit featuring four independent transparent latches with a common clock and adjustable clock polarity.
- What is the supply voltage range for the MC14042B? The supply voltage range is from 3.0 Vdc to 18 Vdc.
- How does the clock polarity control work? The clock polarity can be set to transfer data during either the high or low clock level, depending on the state of the polarity input.
- What kind of input protection does the MC14042B have? The MC14042B features double diode input protection.
- What are the typical propagation delay times for the MC14042B? The propagation delay times are typically 50 ns, 30 ns, and 25 ns for VDD of 5.0 V, 10 V, and 15 V respectively.
- What is the operating temperature range for the MC14042B? The operating temperature range is from -55°C to 125°C.
- How many latches does the MC14042B have? The MC14042B has four independent latches.
- Do all latches share the same clock? Yes, all four latches share a common clock.
- What is the purpose of the Q and Q outputs? The Q and Q outputs provide complementary logic levels for each latch.
- Is the MC14042B available in Pb-free packages? Yes, the MC14042B is available in Pb-free packages.
- What are some common applications for the MC14042B? Common applications include data storage and transfer in digital circuits, clocked logic systems, and any scenario requiring flexible clock polarity control.
