Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Multivibrators

Texas Instruments CD14538BM

Name: CD14538BM
Brand: Texas Instruments
SKU: CD14538BM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CD14538BM

Manufacturer:: Texas Instruments

Category:: Multivibrators

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: CD14538BM.pdf

Description:: IC MULTIVIBRATOR 100NS 16SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:894

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CD14538BM from Texas Instruments is a dual precision monostable multivibrator IC with independent trigger and reset inputs per section, 100% tested for propagation delay (t_PLH/t_PHL ≤ 400 ns at V_DD = 10 V), operating across -55°C to +125°C, and housed in a 16-pin SOIC (D) package. It serves as a timing and pulse-shaping element in digital control systems requiring stable one-shot response.

For engineers reviewing the CD14538BM datasheet, CD14538BM pinout, CD14538BM application, or CD14538BM equivalent, key selection considerations include its dual independent monostable architecture, guaranteed propagation delay performance over full military temperature range, compatibility with CD4098B/CD4538B designs, and availability in RoHS-compliant tape-and-reel packaging (CD14538BM96.A).

Technical Context

The CD14538BM implements two identical, independently operable monostable multivibrators, each with separate A and B trigger inputs, reset input, and Q/Q̅ outputs. Each section supports retriggerable and non-retriggerable modes via external RC network configuration.

Timing is determined by external R and C components connected to pins 1–2 (Section 1) and pins 13–14 (Section 2); output pulse width is adjustable from microseconds to seconds. The device uses CMOS silicon-gate technology, ensuring low static power consumption (I_DD ≤ 20 µA at V_DD = 5 V) and high noise immunity (V_IH ≥ 3.5 V, V_IL ≤ 1.5 V at V_DD = 5 V).

Key Specifications

Parameter	Value and Actual Design Meaning
Function	Dual precision monostable multivibrator with independent triggers and resets
Propagation delay	t_PLH/t_PHL ≤ 400 ns at V_DD = 10 V - enables fast timing resolution in high-speed logic interfaces
Supply voltage range	V_DD = 3 V to 18 V - supports mixed-voltage system integration and battery-backed operation
Operating temperature	-55°C to +125°C - qualified for military, aerospace, and harsh-environment industrial use
Output drive	I_OH/I_OL = ±4.2 mA at V_DD = 15 V - directly drives TTL loads and small capacitive buses without buffering
Input threshold	V_IL ≤ 1.5 V / V_IH ≥ 3.5 V at V_DD = 5 V - ensures robust noise margin against logic-level interference

Pinout & Package

CD14538BM is supplied in a 16-pin SOIC (D) package per TI drawing NS0016A, 3.90 mm body width, 1.75 mm height max, 1.27 mm lead pitch, RoHS-compliant NIPDAU finish, MSL Level-1 rating.

Pin/Terminal	Circuit Role	Design Meaning
1, 2	Section 1 timing RC network	Connect external resistor and capacitor to set Section 1 output pulse width
3, 4	Section 1 trigger inputs (A, B)	Active-low A and active-high B inputs enable flexible edge-triggering configurations
5	Section 1 reset	Asynchronous active-low reset overrides current timing cycle
6, 7	Section 1 outputs (Q, Q̅)	Complementary TTL/CMOS-compatible outputs with rail-to-rail swing
8	GND	Power ground reference for both sections and internal bias network
9, 10	Section 2 outputs (Q, Q̅)	Complementary outputs for second independent monostable channel
11	Section 2 reset	Asynchronous active-low reset for Section 2 only
12, 13	Section 2 trigger inputs (A, B)	Independent A/B trigger pair supporting retriggerable or non-retriggerable mode
14, 15	Section 2 timing RC network	Separate R/C connection for independent pulse-width setting on Section 2
16	V_DD	Positive supply input; decoupling capacitor required near pin for noise suppression

Key Features

Feature	Design Value
Dual independent monostables	Enables two synchronized or asynchronous timing functions on single chip-reduces board space and interconnect complexity
Retriggerable/non-retriggerable mode	Configurable via RC network grounding-supports pulse stretching or clean single-pulse generation
Military temperature qualification	Validated operation from -55°C to +125°C-meets MIL-PRF-38535 requirements for extended environmental reliability
Low quiescent current	I_DD ≤ 20 µA at 5 V - extends battery life in portable instrumentation and remote sensor nodes
Pin-compatible with CD4098B/CD4538B	Direct drop-in replacement for legacy designs-no PCB redesign needed when upgrading from obsolete CD4538B

Applications

Industrial Motion Control	Avionics Timing Interface
Use Scenario: Generating precise gate-enable pulses for stepper motor driver ICs during position correction cycles. IC Role / Device Role / Timing Role: Dual monostable provides synchronized enable/disable windows for H-bridge drivers and feedback sampling windows. Use Value: Guaranteed 400 ns propagation delay ensures deterministic timing alignment between motion command and power stage activation.	Use Scenario: Debouncing discrete switch inputs from cockpit controls before feeding to flight management system logic. IC Role / Device Role / Timing Role: Monostable acts as hardware-based switch filter with user-adjustable timeout to suppress mechanical contact bounce. Use Value: Independent RC networks per section allow simultaneous debounce of multiple critical controls without shared timing constraints.
Test Equipment Pulse Generator	Radiation-Hardened Data Acquisition
Use Scenario: Creating calibrated test pulses for verifying response time of analog-to-digital converter sample-and-hold circuits. IC Role / Device Role / Timing Role: Precision one-shot generates repeatable, jitter-free trigger edges with sub-microsecond stability. Use Value: Propagation delay consistency across -55°C to +125°C eliminates calibration drift in field-deployed bench instruments.	Use Scenario: Providing controlled power-up sequencing signals for radiation-tolerant ADCs and FPGA configuration latches. IC Role / Device Role / Timing Role: Monostable delivers deterministic delay between power rail stabilization and logic initialization commands. Use Value: Military-grade temperature range and CMOS process ensure reliable startup timing under thermal cycling in satellite payloads.

Industrial Motion Control

Avionics Timing Interface

Use Scenario: Generating precise gate-enable pulses for stepper motor driver ICs during position correction cycles.

IC Role / Device Role / Timing Role: Dual monostable provides synchronized enable/disable windows for H-bridge drivers and feedback sampling windows.

Use Value: Guaranteed 400 ns propagation delay ensures deterministic timing alignment between motion command and power stage activation.

Use Scenario: Debouncing discrete switch inputs from cockpit controls before feeding to flight management system logic.

IC Role / Device Role / Timing Role: Monostable acts as hardware-based switch filter with user-adjustable timeout to suppress mechanical contact bounce.

Use Value: Independent RC networks per section allow simultaneous debounce of multiple critical controls without shared timing constraints.

Test Equipment Pulse Generator

Radiation-Hardened Data Acquisition

Use Scenario: Creating calibrated test pulses for verifying response time of analog-to-digital converter sample-and-hold circuits.

IC Role / Device Role / Timing Role: Precision one-shot generates repeatable, jitter-free trigger edges with sub-microsecond stability.

Use Value: Propagation delay consistency across -55°C to +125°C eliminates calibration drift in field-deployed bench instruments.

Use Scenario: Providing controlled power-up sequencing signals for radiation-tolerant ADCs and FPGA configuration latches.

IC Role / Device Role / Timing Role: Monostable delivers deterministic delay between power rail stabilization and logic initialization commands.

Use Value: Military-grade temperature range and CMOS process ensure reliable startup timing under thermal cycling in satellite payloads.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual monostable multivibrator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4098B	Same pinout and function but not specified for -55°C operation; t_PLH/t_PHL not 100% tested	Limited to commercial/industrial temperature range; unsuitable for aerospace or extended-temperature deployments	Select CD4098B only for cost-sensitive, non-military applications where full temp-range validation is unnecessary
CD4538B	Pin-compatible but obsolete; no longer recommended for new designs per TI documentation	Legacy support only; lacks current RoHS compliance and long-term supply assurance	CD14538BM replaces CD4538B with improved test coverage, RoHS compliance, and active production status

Compared with CD4098B and CD4538B, the CD14538BM delivers verified military-temperature performance, guaranteed propagation delay, and active supply chain support-making it the only viable choice for new designs requiring long-lifecycle reliability and environmental robustness.

Availability

CD14538BM is available at Aetrix Electronics and suitable for industrial motion control, avionics interface modules, and test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD14538BM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in high-reliability, industrial-grade ICs.

The CD14538BM belongs to TI's legacy CMOS logic family designed for precision timing in mission-critical systems where environmental resilience and long-term manufacturability are essential.

FAQ

What is the maximum operating voltage for CD14538BM?

The CD14538BM supports a supply voltage range of 3 V to 18 V DC. At V_DD = 18 V, output drive capability remains within specification (±4.2 mA), and propagation delay is characterized up to this limit. Operation beyond 18 V risks permanent damage and is outside absolute maximum ratings defined in the SCHS093C datasheet.

Is CD14538BM pin-compatible with CD4098B?

Yes, CD14538BM is pin-compatible with CD4098B per TI documentation. Both share identical 16-pin SOIC (D) pin assignments, including matching trigger, reset, timing, and output pin locations. However, CD14538BM adds guaranteed propagation delay testing and extended temperature qualification not present in CD4098B.

Does CD14538BM support retriggerable operation?

Yes, CD14538BM supports both retriggerable and non-retriggerable monostable operation per section. Retriggerable mode is enabled by connecting the B input to V_DD and using the A input as the trigger; non-retriggerable mode uses grounded B input and A input for edge-triggered one-shot behavior.

What is the minimum pulse width achievable with CD14538BM?

The minimum practical pulse width for CD14538BM is approximately 1 µs, limited by propagation delay (≤400 ns) and external RC component tolerances. Using 1 kΩ and 100 pF yields ~100 ns nominal width, but layout parasitics and capacitor tolerance reduce usable resolution below 1 µs in production designs.

Is CD14538BM RoHS-compliant and lead-free?

Yes, CD14538BM (including orderable variant CD14538BM96.A) features NIPDAU lead finish and is RoHS-compliant per TI's packaging addendum. It carries MSL Level-1 rating and is qualified for lead-free reflow up to 260°C peak temperature without restriction.

CD14538BM Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 4000B

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Monostable

Independent Circuits:: 2

Schmitt Trigger Input:: Yes

Propagation Delay:: 100 ns

Current - Output High, Low:: 6.8mA, 6.8mA

Voltage - Supply:: 3 V ~ 18 V

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

CD14538BM FAQ

1.How can I place an order for CD14538BM through Aetrix?

Please submit a Request for Quotation (RFQ) for CD14538BM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CD14538BM reliable?

The price and inventory of CD14538BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD14538BM is usually 5 days.

3.What payment methods are accepted for CD14538BM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD14538BM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD14538BM?

CD14538BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD14538BM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CD14538BM?

For technical support, including CD14538BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD14538BM requirements.

6.How does Aetrix verify that CD14538BM is sourced from the original manufacturer or authorized distributors?

All CD14538BM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CD14538BM meets industry standards.

7.What is the process for return or replacement of CD14538BM?

All CD14538BM units undergo pre-shipment inspection (PSI). If there is an issue with CD14538BM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CD14538BM part is unused and in its original packaging.

Return procedure for CD14538BM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…