HEF4538BT

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HEF4538BT

Monostable Multivibrator

  • Manufacturer
  • Mfr. Part #HEF4538BT
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  • Datasheet
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Specifications

Overview

Description

The HEF4538BT is a dual retriggerable monostable multivibrator integrated circuit (IC) designed for generating precise timing pulses. It belongs to the HEF4000 series of CMOS logic devices and is known for its low power consumption and high noise immunity. The HEF4538BT features two independent monostable sections, each capable of outputting a single pulse of adjustable duration in response to a trigger signal.
Key specifications include a wide operating voltage range (typically 3V to 15V), and it can be triggered by either a positive or negative edge. The output pulse width is determined by external resistors and capacitors, allowing for flexibility in timing applications. This IC is commonly used in timer circuits, pulse width modulation, frequency division, and various timing applications in digital electronics.
Due to its versatility and ease of use, the HEF4538BT is popular in both educational and professional electronic projects, making it a valuable component for hobbyists and engineers alike.

Features

The HEF4538BT is a dual monostable multivibrator, part of the HEF4000 series of CMOS logic ICs. Key features include:
1. Dual Configuration: Contains two independent one-shot circuits.
2. Triggering Modes: Can be triggered by positive or negative edge signals.
3. Variable Pulse Width: The output pulse width is adjustable via an external resistor and capacitor.
4. Wide Operating Voltage: Functions within a supply voltage range of 3V to 15V.
5. Low Power Consumption: Consumes low static power, typical of CMOS technology.
6. High Noise Immunity: Offers good noise margins due to its CMOS design.
7. Output Characteristics: Can drive standard TTL and CMOS loads.
8. Propagation Delay: Provides fast response times, typically in the range of microseconds.
9. Temperature Range: Operates effectively across a wide temperature range.
This IC is ideal for applications in timing, pulse generation, and frequency division in digital circuits.

Package

The HEF4538BT is typically packaged in a DIP (Dual In-line Package) format, specifically a 16-pin DIP. This package type allows for easy integration into various electronic circuits and breadboards.

Pinout

The HEF4538BT is a dual precision monostable multivibrator, featuring a total of 16 pins. Its primary function is to generate a single output pulse in response to an input trigger, with the duration of the pulse determined by external resistors and capacitors.
Pin Configuration:
1. 1 (A) - Trigger input A
2. 2 (B) - Trigger input B
3. 3 (Q_A) - Output A
4. 4 (Q_B) - Output B
5. 5 (GND) - Ground
6. 6 (R_A) - Reset input A
7. 7 (R_B) - Reset input B
8. 8 (V_DD) - Supply voltage
9. 9 (C_A) - Control input A
10. 10 (C_B) - Control input B
11. 11 (R1_A) - Timing resistor input A
12. 12 (R1_B) - Timing resistor input B
13. 13 (C1_A) - Timing capacitor input A
14. 14 (C1_B) - Timing capacitor input B
15. 15 (NC) - No connection
16. 16 (NC) - No connection
The HEF4538BT is commonly used in timer applications and pulse generation circuits.

Manufacturer

The HEF4538BT is manufactured by NXP Semiconductors, a global semiconductor company that specializes in designing and manufacturing a wide range of electronic components. NXP is well-known for its innovative products in various markets, including automotive, industrial, mobile, and the Internet of Things (IoT). The company focuses on high-performance mixed-signal and digital processing solutions, providing critical components for applications like secure connectivity, smart mobility, and embedded systems. NXP Semiconductors was originally part of Philips and has since become an independent entity, continuing to play a significant role in the semiconductor industry.

Application

The HEF4538BT is a dual monostable multivibrator IC used in various applications such as timer circuits, pulse width modulation, frequency modulation, and event counting. It can be employed in timing applications for generating precise delays, in control systems for pulse generation, and in digital circuits for signal shaping. Additionally, it is useful in automotive electronics, industrial automation, and consumer electronics for processes requiring reliable timing and signal generation.

Equivalent

The HEF4538BT is a dual monostable multivibrator. Equivalent products include the CD4538, MC14538, and TC4538. These chips offer similar functionalities for timing applications, but it’s essential to check specific datasheets for pin configurations and electrical characteristics to ensure compatibility.

Shipping

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

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