Overview
The SN74LVC1G123DCTTG4, manufactured by Texas Instruments, is a single retriggerable monostable multivibrator. This device is designed to operate over a wide voltage range of 1.65V to 5.5V VCC, making it versatile for various applications. It features Schmitt-trigger inputs to handle slow input transition rates and provides glitch-free power-up reset on all outputs. The device is available in the Texas Instruments NanoFree™ package and supports mixed-mode voltage operation on all ports.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Operating Voltage (VCC) | 1.65 | 5.5 | V |
| Input Voltage | -0.5 | 5.5 | V |
| Operating Temperature | -40 | 125 | °C |
| Maximum Propagation Delay (tpd) at 3.3V | 8 | ns | |
| Low-Level Output Current (IOL) at VCC = 3V | 16 | mA | |
| External Timing Resistance (Rext) at VCC ≥ 3V | 1 kΩ | ||
| Junction-to-Ambient Thermal Resistance (RθJA) for DCT Package | 220 | °C/W |
Key Features
- Available in the Texas Instruments NanoFree™ package
- Supports 5V VCC operation and inputs up to 5.5V
- Schmitt-trigger circuitry on A and B inputs for slow input transition rates
- Edge triggered from active-high or active-low gated logic inputs
- Retriggerable for very long output pulses, up to 100% duty cycle
- Overriding clear terminates output pulse
- Glitch-free power-up reset on outputs
- Ioff supports live insertion, partial-power-down mode, and back-drive protection
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 (2000V Human-Body Model, 200V Machine Model, 1000V Charged-Device Model)
Applications
The SN74LVC1G123DCTTG4 is suitable for a variety of applications, including:
- Switch debounce circuits: The device can convert multiple triggers from a switch into a single, stable output pulse, making it ideal for debouncing switches.
- Pulse generation and timing: The device can generate output pulses with durations controlled by external resistance and capacitance, making it useful in timing and pulse generation applications.
- Mixed-mode voltage operation: It supports mixed-mode voltage operation on all ports, making it versatile for use in systems with different voltage levels.
Q & A
- What is the operating voltage range of the SN74LVC1G123DCTTG4?
The operating voltage range is from 1.65V to 5.5V VCC.
- What type of inputs does the SN74LVC1G123DCTTG4 have?
The device features Schmitt-trigger inputs to handle slow input transition rates.
- How can the output pulse duration be controlled?
The output pulse duration is controlled by selecting external resistance and capacitance values connected between Cext and Rext/Cext and VCC.
- What is the maximum propagation delay at 3.3V?
The maximum propagation delay at 3.3V is 8 ns).
- Does the device support live insertion and partial-power-down mode?
- What is the purpose of the clear (CLR) input?
The clear (CLR) input can be used to terminate the output pulse early).
- What kind of ESD protection does the device have?
The device has ESD protection that exceeds JESD 22 standards (2000V Human-Body Model, 200V Machine Model, 1000V Charged-Device Model)).
- Can the device be used in switch debounce circuits?
- What is the operating temperature range of the SN74LVC1G123DCTTG4?
The operating temperature range is from -40°C to 125°C).
- What package options are available for the SN74LVC1G123DCTTG4?
The device is available in various packages, including DCT (SSOP), DCU (VSSOP), and DSBGA).
