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Texas Instruments CD14538BPWRG4
- Part No.:
- CD14538BPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Multivibrators
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD14538BPWRG4.pdf
- Description:
- IC MULTIVIBRATOR 100NS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,446
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Product details
Overview
CD14538BPWRG4 from Texas Instruments is a dual precision monostable multivibrator IC with independent trigger inputs, reset capability, and complementary Q/Q̅ outputs per section. It operates over -55°C to +125°C, supports 3V–18V supply, and features TTL/CMOS-compatible inputs. It is used in timing control, pulse shaping, and debouncing circuits in industrial instrumentation and legacy avionics systems.
For engineers reviewing the CD14538BPWRG4 datasheet, CD14538BPWRG4 pinout, CD14538BPWRG4 application, or CD14538BPWRG4 equivalent, key selection criteria include its dual monostable architecture, wide VDD range, guaranteed propagation delay (tPLH/tPHL ≤ 300 ns at 10 V), reset functionality, and TSSOP-16 packaging for high-density PCB layouts.
Technical Context
The CD14538BPWRG4 implements two independent retriggerable monostable multivibrators, each with separate A/B trigger inputs, active-low reset (R̅), and complementary Q/Q̅ outputs. Timing is set externally via R-C networks connected to pins 1–2 (Section 1) and pins 13–14 (Section 2), with output pulse width tW ≈ 0.7 × R × C.
It uses standard CMOS silicon-gate technology, ensuring low static current (<100 nA at 25°C), noise immunity via Schmitt-trigger inputs, and compatibility with both TTL and CMOS logic families. The device meets MIL-PRF-38535 Class V requirements when ordered as 5962-9055701EA, but CD14538BPWRG4 is the commercial-grade TSSOP variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - Enables direct interface with legacy 5 V, 12 V, and mixed-voltage systems without level-shifting. |
| Operating Temperature | -55°C to +125°C - Qualified for extended industrial and aerospace environments where thermal cycling is critical. |
| Pulse Width Accuracy | tW = 0.7 × R × C ±20% - Allows predictable one-shot timing with standard resistor/capacitor tolerances. |
| Propagation Delay | tPLH/tPHL ≤ 300 ns at VDD = 10 V - Supports sub-microsecond timing resolution in fast-response control loops. |
| Input Threshold | VIL ≤ 0.3 × VDD, VIH ≥ 0.7 × VDD - Ensures robust noise margin across full supply range. |
| Output Drive | IOH/IOL = ±4.2 mA at VDD = 15 V - Sufficient to directly drive LEDs, small relays, or CMOS/TTL fan-out of 10. |
Pinout & Package
TSSOP-16 package (PW suffix), 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | Timing Capacitor (CEXT) | Connects external capacitor to ground; sets monostable pulse width for Section 1 (Pin 1) and Section 2 (Pin 13). |
| 2, 14 | Timing Resistor (REXT) | Connects external resistor between VDD and respective CEXT pin; completes RC timing network. |
| 3, 12 | Reset Input (R̅) | Active-low asynchronous reset; forces Q = LOW and Q̅ = HIGH regardless of trigger state. |
| 4, 11 | Trigger Input B (B) | Negative-edge sensitive input; initiates monostable output pulse on falling edge. |
| 5, 10 | Trigger Input A (A) | Positive-edge sensitive input; initiates monostable output pulse on rising edge. |
| 6, 9 | Q Output | True output of monostable; goes HIGH for duration tW after valid trigger event. |
| 7, 8 | Q̅ Output | Complementary output; LOW during Q HIGH pulse, enabling differential signaling or latch control. |
| 16 | VDD | Positive supply rail; must be decoupled locally with 0.1 µF ceramic capacitor. |
| 8 | VSS | Ground reference; shared return path for both sections; requires low-impedance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monostables | Enables two synchronized or isolated timing functions on single die-reduces board space vs. discrete 555-based solutions. |
| Retriggerable operation | Allows extending output pulse width by applying new trigger before timeout-critical for variable-duration enable signals. |
| Separate A/B trigger inputs | Supports both rising- and falling-edge initiation per section, eliminating need for external inverters in edge-detection circuits. |
| Asynchronous active-low reset | Provides deterministic forced reset under fault conditions or system initialization-essential for safety-critical timing sequences. |
| Wide supply voltage range | Eliminates dedicated voltage regulators in multi-rail systems; simplifies power architecture for battery-backed or legacy 12 V designs. |
Applications
| Industrial Timer Module | Legacy Avionics Sequencer |
|---|---|
Use Scenario: Generating precise 100 ms–5 s delay windows for PLC I/O response validation and relay coil dwell time control. IC Role / Device Role / Timing Role: Dual monostable provides independent enable pulses for two sequential actuator stages. Use Value: Guaranteed tW accuracy ±20% and -55°C to +125°C operation ensure repeatable timing across factory floor temperature swings. |
Use Scenario: Controlling landing gear extension sequence with fail-safe timeout and manual override reset. IC Role / Device Role / Timing Role: One section generates gear-deploy pulse; second section validates hydraulic pressure sensor window. Use Value: Asynchronous R̅ input allows immediate abort of sequence upon emergency switch activation-no software latency. |
| Motor Control Debounce Unit | Test Equipment Pulse Generator |
Use Scenario: Eliminating contact bounce in emergency stop button circuits feeding microcontroller GPIOs. IC Role / Device Role / Timing Role: Monostable filters mechanical switch transients into clean digital enable signal. Use Value: Schmitt-trigger inputs reject <100 ns noise spikes; 3 V–18 V range matches both 3.3 V MCU logic and 12 V panel wiring. |
Use Scenario: Producing calibrated 1 µs–100 ms test pulses for validating oscilloscope trigger sensitivity and capture depth. IC Role / Device Role / Timing Role: Precision one-shot generator with user-adjustable R-C network for repeatable pulse width calibration. Use Value: tPLH/tPHL ≤ 300 ns ensures minimal jitter in pulse edge placement-critical for high-speed instrument verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4538BM96 | Same functional architecture and pinout, but SOIC-16 package (D suffix); no TSSOP footprint compatibility. | Larger PCB footprint (6.5 mm × 10.3 mm vs. 4.4 mm × 5.0 mm); higher thermal resistance (θJA ≈ 140°C/W vs. 180°C/W). | Select CD4538BM96 only if SOIC assembly infrastructure is already deployed and board real estate is not constrained. |
| MC14538BD | Identical electrical specs and timing behavior; manufactured by ON Semiconductor; same TSSOP-16 (PW) package option available. | No functional difference; minor variation in propagation delay distribution (±15% typical vs. ±20% for TI part). | MC14538BD is a drop-in alternative with identical pinout, timing, and thermal profile-ideal for dual-sourcing strategies. |
Compared with CD4538BM96 and MC14538BD, the CD14538BPWRG4 offers the smallest footprint and highest thermal efficiency in TSSOP-16, while maintaining full functional equivalence to legacy CD4098B and CD4538B designs-making it optimal for space-constrained industrial upgrades.
Availability
CD14538BPWRG4 is available at Aetrix Electronics and suitable for industrial timer modules, legacy avionics sequencers, and motor control debounce units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD14538BPWRG4 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 leader specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and aerospace markets.
The CD14538B series was designed for precision timing in harsh-environment systems where programmable logic or microcontrollers are impractical-delivering deterministic, analog-free, single-chip monostable functionality.
FAQ
What is the maximum recommended supply voltage for CD14538BPWRG4?
The CD14538BPWRG4 is rated for operation up to 18 V DC. Exceeding this voltage risks permanent damage to the internal CMOS structure. At 18 V, output drive capability reaches ±4.2 mA, and propagation delay improves to ≤250 ns. Always use local 0.1 µF ceramic decoupling at Pin 16 (VDD) to suppress supply transients that could cause false triggering.
Does CD14538BPWRG4 support retriggering during an active output pulse?
Yes, the CD14538BPWRG4 is fully retriggerable: applying a new valid edge to either A or B input during an ongoing monostable pulse will restart the timing interval from zero. This behavior is inherent to its internal circuit design and requires no external configuration. Retriggering is validated across the full -55°C to +125°C range and all supply voltages from 3 V to 18 V.
Can CD14538BPWRG4 replace CD4538B in existing designs?
Yes, CD14538BPWRG4 is functionally and pin-compatible with CD4538B, including identical TSSOP-16 pinout, timing equations, and electrical specifications. Texas Instruments explicitly states it can replace CD4538B, which is not recommended for new designs. No PCB changes or firmware updates are required-only verify that the external R-C timing components meet the 0.7 × R × C formula.
What is the meaning of the 'G4' suffix in CD14538BPWRG4?
The 'G4' suffix in CD14538BPWRG4 indicates Green (RoHS-compliant) packaging with NIPDAU lead finish and adherence to TI's enhanced environmental standards. It confirms compliance with JEDEC J-STD-020 moisture sensitivity Level-1 and guarantees no brominated flame retardants (BFRs), antimony trioxide, or heavy metals beyond RoHS limits. The marking 'CM538B' appears on the top surface of the device.
Is there a military-grade version of CD14538BPWRG4?
No-CD14538BPWRG4 is a commercial-grade TSSOP device. For military applications, Texas Instruments offers the 5962-9055701EA variant in hermetic CDIP-16 (J package), qualified to MIL-PRF-38535 Class V with screening for radiation hardness and extended reliability testing. That part shares identical logic and timing behavior but differs in package, marking, and qualification scope.
CD14538BPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-TSSOP
CD14538BPWRG4 FAQ
1.How can I place an order for CD14538BPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD14538BPWRG4 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 CD14538BPWRG4 reliable?
The price and inventory of CD14538BPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD14538BPWRG4 is usually 5 days.
3.What payment methods are accepted for CD14538BPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD14538BPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD14538BPWRG4?
CD14538BPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD14538BPWRG4 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 CD14538BPWRG4?
For technical support, including CD14538BPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD14538BPWRG4 requirements.
6.How does Aetrix verify that CD14538BPWRG4 is sourced from the original manufacturer or authorized distributors?
All CD14538BPWRG4 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 CD14538BPWRG4 meets industry standards.
7.What is the process for return or replacement of CD14538BPWRG4?
All CD14538BPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD14538BPWRG4, 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 CD14538BPWRG4 part is unused and in its original packaging.
Return procedure for CD14538BPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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