MC14538BCP Dual Precision Retiggerable/Resettable Monostable Multivibrator

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MC14538BCP

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Dual Precision Retiggerable/Resettable Monostable Multivibrator

Manufacturer Part Number: MC14538BCP
Brand: Motorola
DateCode: 9630+
Package / Case: DIP16
Category: Integrated Circuits (ICs)
Warranty: 100% Perfect Functions

Model comparison: MC14538BCP vs XD14538 comparison

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Web Site	Package	Brand	Est. Market Price	Description
Texas Instruments (TI)	DIP-18	STMicro electronics	$2.55	单电源双运算放大器，电源范围3V至32V，短路保护输出单电源双运算放大器，电源范围3V至32V，短路保护输出
STMicroelectronics (ST)	DIP-18	STMicro electronics	$2.55	单电源双运算放大器，电源范围3V至32V，短路保护输出单电源双运算放大器，电源范围3V至32V，短路保护输出
DigiKey	DIP-18	STMicro electronics	$2.55	单电源双运算放大器，电源范围3V至32V，短路保护输出单电源双运算放大器，电源范围3V至32V，短路保护输出
Mouser	DIP-18	STMicro electronics	$2.55	单电源双运算放大器，电源范围3V至32V，短路保护输出单电源双运算放大器，电源范围3V至32V，短路保护输出
RS America	DIP-18	STMicro electronics	$2.55	单电源双运算放大器，电源范围3V至32V，短路保护输出单电源双运算放大器，电源范围3V至32V，短路保护输出

The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！

Product Attributes

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	V_CC	-	2.0	5.0	6.0	V
Output Current	I_O	V_OL = 0.4V, V_OH = 4.5V	-10	-	10	mA
Input Voltage	V_I	-	0	-	V_CC	V
Propagation Delay Time	t_pd	V_CC = 5V, T_A = 25°C	10	20	30	ns
Trigger Pulse Width	t_PW	V_CC = 5V, T_A = 25°C	20	40	60	ns
Reset Pulse Width	t_RW	V_CC = 5V, T_A = 25°C	20	40	60	ns
Operating Temperature Range	T_A	-	-40	-	85	°C
Storage Temperature Range	T_STG	-	-65	-	150	°C

Instructions for Using MC14538BCP:

Power Supply:
- Ensure the supply voltage (V_CC) is within the specified range of 2.0V to 6.0V.
- Use a stable power source to avoid voltage fluctuations that can affect performance.
Input Signals:
- The input voltage (V_I) should be between 0V and V_CC.
- Ensure that input signals are clean and free from noise to prevent false triggering.
Output Configuration:
- The output current (I_O) should not exceed ±10mA to avoid damaging the device.
- Use appropriate external components (e.g., pull-up resistors) to ensure proper logic levels.
Propagation Delay:
- The propagation delay time (t_pd) is typically 20ns at V_CC = 5V and T_A = 25°C.
- Consider this delay when designing timing-critical circuits.
Trigger and Reset Pulses:
- The trigger pulse width (t_PW) and reset pulse width (t_RW) should be at least 20ns to ensure reliable operation.
- Longer pulse widths can be used if necessary, but they should not exceed 60ns.
Temperature Considerations:
- The operating temperature range (T_A) is -40°C to 85°C.
- The storage temperature range (T_STG) is -65°C to 150°C.
- Avoid exposing the device to temperatures outside these ranges to prevent damage.
Handling and Storage:
- Handle the device with care to avoid static discharge, which can damage sensitive components.
- Store the device in a dry, cool place to prevent moisture-related issues.

By following these guidelines, you can ensure optimal performance and reliability of the MC14538BCP in your application.

(For reference only)

Description

The MC14538BCP is a dual precision retrigger able, resettable mono stable multi vibrator. This multi vibrator is triggered by the edge of the input pulse and it produces an accurate output pulse over a wide range of widths. Also the duration and accuracy of the device is measures by the external timing terms namely C_X and R_X. Here the R_X component is in ohms (Ω) while the C_Xcomponent is measured in Farads. This mono stable multi vibrator is a part of the family MC14538B, the suffix P resembles to its build.

SupplierFile/202007/13/f_65faaa34732c45a0a9440d3d5ae051a2.png

To understand the working of this device, the above labelled logic diagram can be useful. This device is popularly manufactured by on semiconductor in the package of PDIP – 16.

Pin configuration

SupplierFile/202007/13/f_9909c84dc07449788b3119359da9280f.png

The MC14538BCP consist of total 16 pin, also it is a THT component so it can be easily inserted in a perf board or a zero PCB. The device contains two input pins labelled as A and B. While the output pin is labelled as Q. The R_X and C_X are for the external components, capacitor and resistor respectively. The pin number 16 refers to the V_DD (DC Power supply) and the pin number 8, 1 and 15 is labelled as V_SS refers to the ground connection of the device. The reset pin on the pin number 3 and 13 of the MC14538BCP sets the reset latch and causes the capacitor to be fast charged. For further information regarding pin configuration of the device please refer to its datasheet.

Features

● The device offers a pulse width of range 10μs to 10s

● Consists of separate latched reset inputs

● Pin – for – Pin compatible with CD4528B ( CD4098 )

● This device can easily drive two low power TTL loads as wellas one low power Schottky TTL load under the rated temperature range

● Has a DC supply voltage ranging from -0.5V to 18V

● The Trigger input allows unlimited rise and fall time

● Its Power Dissipation per package is 500mW only

● Has a very common operating temperature range of -55℃ to 125℃

● They are Lead free and they are RoHS compliant that means they are free from hazardous materials which are found in the electronic products

● PPAP capable

Application

SupplierFile/202007/13/f_5fff1d5f02004db79a579e549016c4e4.png

Trigger able and Non-trigger able circuit

The MC14538BCP offers a wide range of features due to which it can be used in retrigger able mono stables circuitry and non – trigger able mono stables circuitry system. By understanding its relevant properties, the MC14538BCP can be easily replaced by the IC CD14538B.

QUANTITY	UNIT PRICE	PLUS UNIT PRICE	TOTAL PRICE
≥1:	US $0.71568	US $0.64411	US $0.64411
≥5:	US $0.57254	US $0.51529	US $2.57645
≥10:	US $0.32921	US $0.29629	US $2.96290
≥20:	US $0.28627	US $0.25764	US $5.15280
≥50:	US $0.25764	US $0.23188	US $11.59400
≥100:	US $0.22961	US $0.20665	US $20.66500
≥200:	US $0.22305	US $0.20075	US $40.15000
≥500:	US $0.21649	US $0.19484	US $97.42000
≥1000:	US $0.20993	US $0.18894	US $188.94000

Substitute (equivalent) Product

Substitute Product	Description
CD4538BCN	Dual Precision Monostable Multivibrator with independent trigger inputs, ideal for precise timing applications.
74HC123N	Dual Retriggerable Monostable Multivibrator for high-speed operations with retriggering and resetting capabilities.
MC74HC123ANG	High-Speed CMOS Dual Retriggerable Monostable Multivibrator, compatible with the MC14538BCP pin configuration.
CD74HCT123E	High-Speed Monostable Multivibrator with a logic level operation suitable for various timing tasks.
SN74LS123N	Dual Retriggerable Monostable Multivibrator in a low-power Schottky design, excellent for low-power applications.

Product Usage

The MC14538BCP is a CMOS Monostable Multivibrator (commonly referred to as a timer or pulse generator) IC. It is versatile and can be used in a variety of circuits where precise timing or pulse generation is required. Here are some common applications and circuits that might use the MC14538BCP:

Pulse Generation:
- Delay Circuits: Generates a delay for a specified period of time when triggered.
- Pulse Width Modulation (PWM): Creating pulse trains with adjustable duty cycles.
Timers:
- Timers for Signal Processing: Timing intervals in signal processing applications.
- Debouncing: Debouncing mechanical switches to produce clean, bounce-free digital signals.
Oscillators:
- Astable Oscillators: Configured to generate a continuous square wave for clock generation or other applications requiring a periodic signal.
- Monostable Oscillators: Generating a single pulse of a specified width following each trigger event.
Frequency Counters and Dividers:
- Frequency Counters: Counting the number of pulses within a given time frame.
- Frequency Dividers: Reducing the frequency of a signal by generating a pulse for every set number of input pulses.
Timers for Control Systems:
- Sequential Timers: Used in automation to control the sequence of operations.
- Time Delay Relays: Activating a relay after a certain delay upon receiving a signal.
Waveform Generation:
- Pulse Shapers: Shaping digital signals into desired forms, like stretched or shortened pulses.
- Square Wave Generators: Producing consistent square waves for clock signals in digital circuits.

The MC14538BCP offers two independent monostable multivibrator sections, which can be individually triggered and timed.

Typical Circuit Example

Here is a simple example of how you might use the MC14538BCP in a monostable pulse generator circuit:

Components Needed:
- MC14538BCP IC
- Resistor (R) and Capacitor (C) to set the timing interval.
- Voltage supply (Vcc)
- Trigger input source (button, signal generator, etc.)
- Output load (e.g., LED, microcontroller input pin, etc.)
Circuit Connections:
- Vcc: Connect to the power supply (typical voltage range: 3V to 15V).
- Ground (GND): Connect to the circuit ground.
- Trigger Input: Connect your trigger source to the appropriate trigger input pin.
- Timing Components: Connect the resistor (R) and capacitor (C) between the timing pins as specified in the datasheet to set the desired pulse width.
- Output: Connect the output pin to the load (e.g., an LED with a current-limiting resistor, or the input pin of another digital circuit).

When a trigger is received, the IC generates an output pulse of width determined by the values of the external resistor and capacitor.

You would typically refer to the MC14538BCP datasheet for detailed pin configurations, exact formulas for setting the timing interval, and further application notes to optimize your specific circuit design.

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MC14538BCP Dual Precision Retiggerable/Resettable Monostable Multivibrator

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MC14538BCP

MC14538BCP has several brands around the world that may have alternate names for MC14538BCP due to regional differences or acquisition. MC14538BCP may also be known as the following names:

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