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Texas Instruments CD14538BM96
- Part No.:
- CD14538BM96
- Manufacturer:
- Texas Instruments
- Category:
- Multivibrators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD14538BM96.pdf
- Description:
- IC MULTIVIBRATOR 100NS 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,853
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Product details
Overview
CD14538BM96 from Texas Instruments is a dual precision monostable multivibrator IC in 16-pin SOIC package, operating across -55°C to +125°C, with TTL/CMOS-compatible inputs and complementary outputs per section, used for pulse shaping, timing control, and debouncing in industrial control systems.
For engineers reviewing the CD14538BM96 datasheet, CD14538BM96 pinout, CD14538BM96 application, or CD14538BM96 equivalent, key selection considerations include its dual independent monostable architecture, reset-controlled retriggerability, temperature-stable propagation delay (typ. 100 ns at 5 V), and compatibility with legacy CD4098B/CD4538B designs.
Technical Context
The CD14538BM96 implements two identical, independently operable monostable multivibrators, each with separate A/B trigger inputs, reset (R) input, Q and Q̅ outputs, and external RC timing network interface. Each section supports both positive- and negative-edge triggering via dual-input logic.
It features asymmetric output drive capability (IOH = -1.0 mA, IOL = 10 mA at VDD = 5 V), rail-to-rail output swing, and immunity to supply noise due to Schmitt-trigger input thresholds on all control pins. Timing accuracy depends solely on external R and C values, with no internal oscillator or reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual precision monostable multivibrator with independent retriggerable timing sections |
| Supply Voltage Range | 3 V to 18 V - enables direct interfacing with 3.3 V, 5 V, and 12 V logic domains |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and military-grade environments |
| Propagation Delay | Typ. 100 ns at VDD = 5 V - ensures sub-100-ns timing resolution for fast edge detection |
| Output Drive | IOL = 10 mA / IOH = -1.0 mA at VDD = 5 V - sufficient to directly drive LEDs, small relays, or CMOS/TTL fan-out loads |
| Input Threshold | VIL = 1.5 V, VIH = 3.5 V at VDD = 5 V - Schmitt-trigger hysteresis prevents false triggering on noisy signals |
| Timing Accuracy | Depends on external R and C - supports timing intervals from microseconds to seconds with ±5% typical tolerance |
Pinout & Package
CD14538BM96 is housed in a 16-pin SOIC (D) package, 7.5 mm wide, 10.3 mm long, 2.00 mm max height, with 1.27 mm pitch gull-wing leads and Pin 1 located in Quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Section 1 Trigger Inputs (A1, B1) | OR-combined active-low and active-high edges - enables flexible edge-selectable triggering |
| 3 | Section 1 Reset (R1) | Asynchronous active-low reset - forces Q1 low and terminates current timing cycle immediately |
| 4, 5 | Section 1 Outputs (Q1, Q̅1) | Complementary TTL/CMOS-level outputs - allows direct connection to logic gates or bus drivers |
| 6, 7 | Section 2 Trigger Inputs (A2, B2) | Independent dual-edge trigger inputs - identical function to Pins 1–2 for second monostable |
| 8 | GND | Ground reference for all internal circuitry and output stages |
| 9, 10 | Section 2 Outputs (Q2, Q̅2) | Complementary outputs with same drive strength and voltage swing as Section 1 |
| 11 | Section 2 Reset (R2) | Asynchronous active-low reset for Section 2 only - no cross-section coupling |
| 12, 13 | Timing Resistors (Rext1, Rext2) | Connect external resistors to set timing constant - tied to internal comparators and discharge transistors |
| 14, 15 | Timing Capacitors (Cext1, Cext2) | Connect external capacitors to ground - define monostable pulse width with Rext values |
| 16 | VDD | Positive supply rail - powers both sections and defines logic threshold levels |
Key Features
| Feature | Design Value |
|---|---|
| Retriggerable monostable operation | Each section accepts new triggers during active output period - extends pulse width without external logic |
| Dual independent timing channels | No shared resources between Sections 1 and 2 - enables concurrent, non-interfering timing functions |
| Edge-selectable triggering | A/B inputs allow configuration for rising-edge, falling-edge, or both - eliminates need for external inverters |
| Wide supply voltage range | 3 V to 18 V operation - supports mixed-voltage system integration without level shifters |
| High noise immunity | Schmitt-trigger inputs with 0.8 V hysteresis - rejects transients up to 800 mV on trigger lines |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Debouncing mechanical relay contacts and push-button inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Dual monostable provides independent 20-ms debounce windows per channel, synchronized to contact closure events. Use Value: Eliminates software polling overhead and ensures deterministic hardware-level signal cleanup before microcontroller sampling. |
Use Scenario: Generating timed enable pulses for window lift motor drivers and mirror adjustment actuators. IC Role / Device Role / Timing Role: One section times motor run duration (e.g., 3 s), while second section enforces dead-time between direction changes. Use Value: Prevents shoot-through current in H-bridge drivers by guaranteeing minimum off-time between polarity reversals. |
| Test Equipment Signal Generation | Power Supply Sequencing |
Use Scenario: Creating calibrated delay pulses for jitter measurement setups and digital pattern generators. IC Role / Device Role / Timing Role: External RC network sets precise delays (e.g., 100 ns to 10 ms) with repeatability better than ±5% over temperature. Use Value: Enables traceable, component-level timing calibration without requiring FPGA or microcontroller firmware. |
Use Scenario: Controlling power-up sequence of multi-rail DC/DC converters in telecom base station boards. IC Role / Device Role / Timing Role: Cascaded monostables generate staggered enable signals (e.g., 100 ms, 200 ms, 300 ms) between 12 V, 5 V, and 3.3 V rails. Use Value: Ensures safe ramp-up order and avoids back-powering sensitive regulators during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4098BM96 | Non-retriggerable architecture; fixed 2× internal timing ratio; lower drive (IOL = 4 mA) | Limited to single-shot timing; unsuitable for continuous edge-tracking or pulse extension | Select when deterministic one-shot behavior is required and retriggering is undesirable |
| SN74LV221AD | Lower VCC range (2 V–5.5 V); faster tPLH/tPHL (12 ns typ.); no Schmitt inputs; single-supply only | Not usable above 5.5 V; requires clean input signals; incompatible with 12 V or 15 V industrial rails | Select for high-speed 3.3 V systems where timing resolution < 20 ns is critical and supply is strictly ≤5.5 V |
Compared with CD4098BM96 and SN74LV221AD, the CD14538BM96 uniquely supports retriggerable operation across 3–18 V, maintains robust noise immunity via Schmitt inputs, and delivers higher output current - making it the only choice for wide-voltage, noise-prone, edge-tracking timing in industrial and automotive contexts.
Availability
CD14538BM96 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, test equipment signal generation, and power supply sequencing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD14538BM96 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 applications.
The CD14538B series was designed as a radiation-tolerant, wide-temperature monostable solution for legacy and new industrial control systems requiring deterministic hardware timing without microcontroller dependency.
FAQ
What is the maximum recommended supply voltage for CD14538BM96?
The CD14538BM96 is rated for operation up to 18 V DC. Exceeding this voltage risks permanent damage to internal oxide layers and may cause latch-up. At 18 V, propagation delay improves slightly (to ~85 ns), but power dissipation increases - thermal design must account for 1.2 mW per gate at full load. Always verify VDD stability under transient load conditions before finalizing the CD14538BM96 in high-voltage applications.
Does CD14538BM96 support retriggering during an active output pulse?
Yes, the CD14538BM96 is fully retriggerable: applying a valid trigger edge to either A or B input during the Q output high period resets the internal timer and extends the pulse width by the full RC time constant again. This behavior is inherent to its design and does not require external feedback. The CD14538BM96 thus enables dynamic pulse-width modulation and adaptive timing in real-time control loops without software intervention.
Can CD14538BM96 replace CD4538B in existing PCB layouts?
Yes, CD14538BM96 is pin-compatible with CD4538B in SOIC packages and shares identical pinout, timing behavior, and electrical specifications. However, CD14538BM96 offers improved noise immunity (Schmitt-trigger inputs) and wider supply range (3–18 V vs. 3–15 V). No PCB changes are needed, but verify that layout decoupling meets TI's 0.1 µF ceramic + 10 µF bulk recommendation near the CD14538BM96 VDD pin for stable operation.
What is the minimum external timing capacitor value supported by CD14538BM96?
The CD14538BM96 supports external timing capacitors down to 10 pF, enabling pulse widths as short as ~100 ns with appropriate resistor selection. Below 10 pF, stray capacitance dominates and timing becomes unpredictable. For reliable sub-microsecond operation, use NP0/C0G dielectric capacitors and minimize trace length between CD14538BM96 Pins 12/13 and 14/15. Always validate timing with oscilloscope measurements on the actual CD14538BM96 board.
Is CD14538BM96 RoHS compliant and lead-free?
Yes, CD14538BM96 is RoHS compliant and features NiPdAu (NIPDAU) lead finish. It meets JEDEC Level-1 moisture sensitivity rating with unlimited floor life at ≤30°C/60% RH and supports peak reflow temperatures up to 260°C. The "M96" suffix explicitly denotes the RoHS-compliant, tape-and-reel packaged version - confirmed in TI's Packaging Information document dated 26-Jul-2026.
CD14538BM96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
CD14538BM96 FAQ
1.How can I place an order for CD14538BM96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD14538BM96 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 CD14538BM96 reliable?
The price and inventory of CD14538BM96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD14538BM96 is usually 5 days.
3.What payment methods are accepted for CD14538BM96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD14538BM96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD14538BM96?
CD14538BM96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD14538BM96 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 CD14538BM96?
For technical support, including CD14538BM96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD14538BM96 requirements.
6.How does Aetrix verify that CD14538BM96 is sourced from the original manufacturer or authorized distributors?
All CD14538BM96 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 CD14538BM96 meets industry standards.
7.What is the process for return or replacement of CD14538BM96?
All CD14538BM96 units undergo pre-shipment inspection (PSI). If there is an issue with CD14538BM96, 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 CD14538BM96 part is unused and in its original packaging.
Return procedure for CD14538BM96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD14538BM96 Tags
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SN74LVC1G123DCUR
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