Overview
The CD4049UBE is a CMOS hex inverting buffer and converter produced by Texas Instruments. This device is part of the CD4049UB series, which features six inverting buffers designed for logic-level conversion and driving capabilities. The CD4049UBE is particularly useful for converting CMOS logic levels to DTL (Diode-Transistor Logic) or TTL (Transistor-Transistor Logic) levels, making it versatile in various digital circuit applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3 | - | 18 | V |
| Input Current (IIN) | ±0.1 | - | ±1 | µA |
| Output Low Voltage (VOL) | 0 | - | 0.4 | V |
| Output High Voltage (VOH) | 4.95 | - | 5 | V (at VCC = 5V) |
| Output Low Current (IOL) | 2.6 | - | 5.2 | mA (at VCC = 5V) |
| Propagation Delay Time (tPLH, tPHL) | 32 | - | 65 | ns (at VCC = 5V) |
| Input Capacitance (CIN) | 15 | - | 22.5 | pF |
| Junction-to-Ambient Thermal Resistance (RθJA) | 49.5 | - | 108.9 | °C/W |
Key Features
- Inverting hex buffers with high sink current capability to drive two TTL loads.
- Logic-level conversion using only one supply voltage (VCC).
- High input impedance and low input current.
- Maximum input current of 1 µA at 18 V over the full package temperature range.
- Parametric ratings for 5 V, 10 V, and 15 V supply voltages.
- Available in various packages including PDIP, SOIC, SO, and TSSOP.
Applications
- CMOS to DTL or TTL converters.
- CMOS current sink or source drivers.
- CMOS high-to-low logic level converters.
- General-purpose digital logic circuits requiring level conversion and buffering.
Q & A
- What is the primary function of the CD4049UBE?
The CD4049UBE is primarily used as an inverting hex buffer and converter for logic-level conversion, particularly from CMOS to DTL or TTL levels.
- What are the typical supply voltage ranges for the CD4049UBE?
The device can operate with supply voltages ranging from 3 V to 18 V.
- How many inverting buffers does the CD4049UBE contain?
The CD4049UBE contains six inverting buffers.
- What is the maximum output low current (IOL) at VCC = 5 V?
The maximum output low current (IOL) at VCC = 5 V is 5.2 mA.
- What are the typical propagation delay times for the CD4049UBE?
The typical propagation delay times (tPLH and tPHL) at VCC = 5 V are 32 ns to 65 ns.
- What is the input capacitance (CIN) of the CD4049UBE?
The input capacitance (CIN) is typically between 15 pF and 22.5 pF.
- In what packages is the CD4049UBE available?
The CD4049UBE is available in PDIP, SOIC, SO, and TSSOP packages.
- What is the junction-to-ambient thermal resistance (RθJA) for the SOIC package?
The junction-to-ambient thermal resistance (RθJA) for the SOIC package is approximately 81.6 °C/W.
- Can the CD4049UBE drive TTL loads directly?
- What is the maximum input current (IIN) at 18 V?
The maximum input current (IIN) at 18 V is ±1 µA.
