Overview
The 74HC4538D/S420118, produced by NXP USA Inc., is a dual retriggerable-resettable monostable multivibrator. This component is part of the 74HC series and is designed for precision timing applications. Each multivibrator within the device has two trigger/retrigger inputs, a direct reset input, and two complementary outputs. The device is highly versatile, allowing triggering from either the positive or negative edges of the input pulse.
The 74HC4538D/S420118 operates within a wide supply voltage range of 2.0 to 6.0 V and is known for its low power dissipation, making it suitable for a variety of electronic systems. It is packaged in a 16-SOIC (Small Outline Integrated Circuit) package, which is lead-free and RoHS compliant.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Type Number | 74HC4538D | - |
| Supply Voltage (VCC) | 2.0 - 6.0 | V |
| Logic Switching Levels | CMOS | - |
| Output Drive Capability | ± 5.2 | mA |
| Propagation Delay (tpd) | 27 | ns |
| Operating Temperature | -40°C to +125°C | °C |
| Package Type | 16-SOIC (0.154", 3.90mm Width) | - |
| Mounting Type | Surface Mount | - |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V | - |
Key Features
- Dual retriggerable-resettable monostable multivibrator with two trigger/retrigger inputs and a direct reset input.
- Wide supply voltage range from 2.0 to 6.0 V.
- CMOS low power dissipation and CMOS input levels.
- High noise immunity and tolerant of slow trigger rise and fall times due to Schmitt-trigger action in the trigger inputs.
- Separate reset inputs and the ability to trigger from either the positive or negative edges of the input pulse.
- Lead-free and RoHS compliant 16-SOIC package.
- ESD protection: HBM exceeds 2000 V and CDM exceeds 1000 V.
Applications
The 74HC4538D/S420118 is suitable for various timing and pulse generation applications in electronic systems. It can be used in:
- Pulse width modulation and timing circuits.
- Sequential logic circuits requiring precise timing.
- Automotive and industrial control systems where robust and reliable timing is crucial.
- Consumer electronics and communication devices needing low power and high noise immunity.
Q & A
- What is the primary function of the 74HC4538D/S420118?
The primary function is to act as a dual retriggerable-resettable monostable multivibrator, generating precise timing pulses.
- What is the supply voltage range for this component?
The supply voltage range is from 2.0 to 6.0 V.
- What type of package does the 74HC4538D/S420118 come in?
The component is packaged in a 16-SOIC (Small Outline Integrated Circuit) package.
- Is the 74HC4538D/S420118 lead-free and RoHS compliant?
- What is the propagation delay of the 74HC4538D/S420118?
The propagation delay is approximately 27 ns.
- Can the 74HC4538D/S420118 be triggered by both positive and negative edges of the input pulse?
- What is the ESD protection level of the 74HC4538D/S420118?
The ESD protection exceeds 2000 V for HBM and 1000 V for CDM.
- What are the operating temperature ranges for this component?
The operating temperature ranges from -40°C to +125°C.
- Does the 74HC4538D/S420118 have Schmitt-trigger inputs?
- Can the output pulse width be controlled externally?
